MPR-6/3
Motor Protection Relay with 3 thermal sensor inputs
Instruction Manual
This instruction manual is updated for MPR-6/3 manufactured after Nov. 1 2003
Table of Contents Page 2 3 4-5 6-7 8-9 10-15 16 17-18 19 20 21 22 23 24-25 26
Subject Introduction Wiring Diagram Terminal Review Front Panel and LCD Displays Menu Configuration Parameter Settings Trip/Alarm and Reset Options Setting Summary Actual Data Statistical Data Service Messages Flash & Constant Massages Communication Technical Specification Dimensions
Safety • Read this manual carefully before operating the equipment and follow its instructions • Installation, operation and maintenance should be in strict accordance with this manual, national codes and good practice. Installation or operation not performed in strict accordance with these instructions will void manufacturer’s warranty. • Disconnect all power inputs before servicing the MPR-6.
Attention 1. 2. 3.
This product was designed for compliance with IEC 947-4-2 for class A equipment. The MPR-6 is designed to meet UL requirements For further information, see Technical Specification
Warnings • Internal components and PCBs are at main potential when the MPR-6 is connected to main. This voltage is extremely dangerous and will cause death or severe injury if contacted. • Unit must be grounded to ensure correct operation, safety and to prevent damage.
The company reserves the right to make any improvements Or modifications to its products without prior notice.
1
Introduction The MPR-6 Motor Protection Relay is a new generation of microprocessor based relay designed to protect three phase induction motors. The MPR-6 incorporates two main functions. a. Motor protection. b. Supervision and communication.
"Time To Trip" and "Time To Start" When current exceeds the overload setting a built-in unique algorithm calculates the time until motor will be tripped (when thermal capacity is 100%), enabling the operator or host computer to take corrective actions before tripping. After the MPR-6 has tripped the motor it will calculate the time delay until motor can be restarted, after it has cooled down.
Motor Protection AC motors are very rugged and reliable when operating within their limits. However, they are usually designed to operate close to their rated limits with minimal margins for operating under abnormal conditions. A comprehensive protection device is required to accurately create a Thermal Model for the motor to run safely up to its limits. This relay should protect the motor from abnormal conditions in the power supply, motor and cable faults as well as operator malfunctions. The MPR-6 monitors three phase and ground currents (true RMS line currents are measured at a sampling rate of 0.5 mSec) and three temperature (RTD or PTC/NTC Thermistor) inputs. In all, the MPR-6 provides a comprehensive protection package. Protection - Too many starts - Maximum start time, - Under current - Load increase - Thermal level (Overload) - Over-current Jam / Stall & Short circuit - Unbalanced current - Ground fault current - Phase Sequence - Temperature (3 Sensors)- RTD Pt.100 or PTC/NTC Thermistor - External fault 1- N.O/N.C contacts - External fault 2 - N.O/N.C contacts
Informative data An illuminated LCD (Liquid Crystal Display) with 2 lines and 16 characters each provides clear status and statistical information. Identical information is available through the communication Actual Data - Phase currents, Ground fault current, Three Temperature sensors (PT100 or Thermistor) temperatures or resistances, Motor load in % of FLC, Thermal Capacity, Time to trip, Time to start, Unbalanced current.
Statistical Data - Motors running hours, Total number of starts, Total number of trips, Last start time, last start current peak, Last Trip, Last Alarm, Pre-Trip Phase currents and Ground fault current.
(*)
Communication RS485 serial link with Modbus communication protocol, operating at baud rate of 1200 to 9600 bits/sec enables monitoring of setpoints and actual parameters. Modifications of the setpoint parameters through the serial link make it very easy to enter user setpoints in place of the factory default parameters. The serial link enables remote control of both the MPR-6 and the motor. Up to 32 MPR-6 relays can be connected on the same link to the host computer. When a need for more than 32 units arises, using MMI & Data highway equipment, an unlimited number of relays can be connected to the host computer.
(*) (*) (*) (*) (*)
Two separate levels (*) Each of these faults has 2 separate levels. Normally level 1 will be used as an Alarm and level 2 as a Trip. It is possible to use both as Alarms or as Trips with different time delays.
Analogue Output Programmable Analogue Output in reference to: Motor Load Current, Max. of I1-I3, I1, I2, I3, Ground Current, T1, T2, T3, Min. of T1-T3, Max of T1-T3, Thermal Capacity and can be programmed to normal or inverted : 0-20mA, 4-20mA outputs.
Field settings Protection levels and time delay settings are individually configured through the key pad on the front panel or through the communication port.
Easy setting and operation The front panel LCD together with a Keypad and LEDs enables user friendly interface, accurate digital parameters setting, actual parameters reading, and detailed trip and alarm messages display. Unauthorized setting changes can easily be prevented by the software setting
Configurable operation Unique Tripping/Alarm options, makes it possible to designate any of the above faults as an Alarm, Trip, both or none. Further more, two auxiliary relays can be designated to operate with any of the faults.
2
Wiring Diagram & Terminals Review
3
Wiring Diagram & Terminals Review Ground Fault Current ........................................ 29, 30
Output Relays (C/O, 8A/250VAC, 2000VA)
C/T Wiring Diagrams Alarm Relay (Fail-Safe logic) Common .................................................................... 1 N.C ............................................................................ 2 N.O ........................................................................... 3 Fail safe logic - when MPR-6 is energized Alarm Relay is energized (changing contacts position). Upon fault which is designated as "Alarm" the relay de-energizes (contacts return to original position).
Note: It is advisable to use Core Balance C/T. C T1
3 phase C/Ts + Core Balance C/T
Trip Relay Can be designated (by parameter setting) as one of: * Trip relay (changes contact position upon fault which is designated as "Trip"). * Trip relay with Fail-Safe logic. Common ……………………………………………..4 N.C ............................................................................ 5 N.O ........................................................................... 6
C T2
5A 21
5A 22
23
24
C T3
C T4
5A
5A
26
27
29
30
L1 L2 L3
C T1
3 phase C/Ts in a Residual Ground Fault connection .
Programmable Relay C Can be designated (by parameter setting) as auxiliary relay - dedicated for a fault or group of faults. Common ……………………………………………..7 N.C ............................................................................ 8 N.O ........................................................................... 9
C T2
5A 21
5A 22
23
24
25
C T3
C T4
5A
5A
26
27
28
29
30
L1 L2 L3
Note: In case of residual Ground Fault connection, It is recommended to set G/F During Strt to relatively high level, to avoid nuisance tripping.
Programmable Relay D Can be designated (by parameter setting) as auxiliary relay - dedicated for a fault or group of faults. Common ……………………………………………10 N.C .......................................................................... 11 N.O ......................................................................... 12
C T1
Optional wiring: Three phase protection using 2 C/Ts. Where: I3=-(I1+I2)
Discrete inputs Input 1....................................................................... 13 Programmable: Reset, External Fault (N.O or N.C). Input 2 ...................................................................... 14 Programmable: Reset, External Fault (N.O or N.C). Common .................................................................. 15 Note: The Discrete input circuitry is isolated as a group from all other terminals.
C T2
5A 21
5A 22
23
C T4
C T3
5A 24
25
26
5A 27
28
29
30
L1 L2 L3
Note: This connection is not recommended. In case this connection must be used, accuracy will be reduced and Ground Fault [protection is not possible.
Control power supply 115, 230VAC to be specified, at 50/60 Hz. Consult factory for universal AC/DC power supply. Ground ..................................................................... 18 Neutral ..................................................................... 19 Phase ..................................................................... 20 Analogue Inputs Line Currents (from 5A C/T, or 1A by special order) Phase L1 ........................................................... 21 ,22 Phase L2 ..................................................... 23 ,24 ,25 Phase L3 . .................................................... 26, 27, 28 Terminals 25 and 28 are for convenience when residual wiring is used
4
Wiring Diagram & Terminals Review Resistances
RTD / Thermistor Input
* RTD 100Ω-240Ω * Thermistor 0.1KΩ-30KΩ
RTD 100-240Ω ...........................................41-42&43 RTD 100-240Ω ...........................................44-45&46 RTD 100-240Ω ...........................................47-48&49 (Where 43, 46 & 49 are for RTD compensation)
RTD or Thermistor selection (all must be of same type) is done by removing rear panel to set Dip Switches SW1.1 - SW1.8 on Micro-Controller Printed Circuit Board. Set all 8 ON for Thermistors and OFF for RTDs. Set “CH. 1 2 3 Sensoer” setting parameter accordingly.
Thermistor 0.1K-30KΩ ....................................41-42 Thermistor 0.1K-30KΩ ....................................44-45 Thermistor 0.1K-30KΩ ....................................47-48
RTDs three wire measurement system is used to compensate for cable resistance. See temperature table below.
Disconnected Temperature Sensor The MPR-6/3 contains “Disconnected Temp. Sensor” which detects a missing sensor and signals the “Alarm”, but not the “Trip”. Normally, when a sensor’s temperature is very high, a typical relay will trip on high temperature. In the MPR-6/3 when temperature reading becomes infinite rapidly, it will only Alarm and will not Trip. Temp. measurements will show ????.
Resistance-Temperature-Device Conversion Table (Pt.100=Platinum 100 Ω) TEMP IN Pt.100 OHMS (Ω) (°C) (DIN 43760) --------------------------------------------0 100.00 10 103.90 20 107.79 30 111.67 40 115.54 50 119.40 60 123.24 70 127.07 80 130.89 90 134.70 100 138.50 110 142.29 120 146.06 130 149.82 140 153.58 150 157.32 160 161.04 170 164.76 180 168.46 190 172.16 200 175.84
Serial Link Standard RS485 Half Duplex, with MODBUS protocol. Twisted shielded pair should be used for wiring. Serial Port (-) ............................................................ 39 Serial Port (+) ........................................................... 40 Shield – Connect to Ground Note: 1. In order to match the line, connect 120 Ω resistor between (+) and (-) at the end and beginning of the line. Analogue Output Programmable Analogue Output in reference to: Motor Load Current, Max. of I1-I3, I1, I2, I3, Ground Current, T1, T2, T3, Min. of T1-T3, Max of T1-T3, Thermal Capacity and can be programmed to normal or inverted output. Twisted shielded pair should be used for wiring, Connect Shield to Ground. Frogramming allow selection between: 0-20mA 4-20mA Or their respective inverse.Maximum value (20mA or 0mA) is related to max. scale defined in the “Analogue out Full Range” window.
Notes: 1. Leave terminals open if temperature sensor is not connected and Disable temp. Alarm and Trip. 2. Maximum cable resistance allowed for RTD, must be less than 25Ω. 3. Shielded cables must be used, connect shield to ground (earth).
Analogue Port (+) ..................................................... 51 Analogue Port (-) ...................................................... 52 Shield – Connect to Ground (See note) Warning The communication circuit is isolated as a group together with analogue output. The analogue output circuit is isolated as a group together with the RS485 communication. When using both connections, verify that analogue out user (or RS-485 user) is using isolated circuitry.
5
Front Panel &LCD Displays LEDs and LCD
Keys
On - Illuminates when control power supply is connected.
Page - Press to change set-point pages in positive cyclical order.
Start/ Run - Flashes during starting, illuminates continuously after completion of starting
Select - Press to scroll parameters within page. If key is pressed for more than 0.5 sec, parameters will be displayed at a fast rate.
Alarm /Trip - Flashes in Alarm condition, illuminates continuously at Trip condition . Turns off after resetting.
- Press to increase / decrease parameter value. Press and hold to fast rate changing (*).
LCD Display – Illuminated two lines of 16 characters each, presenting all data and messages.
Store - Press to store displayed parameter value in the non-volatile memory (*).
Operation Upon initiation the On LED lights and the LCD displays: Communication ***Settings*** In order to review above page press Select key. Messages are displayed on the LCD in two lines. • Upper line describes parameter's name. • Lower line shows its value. To change settings, press or keys and save the new value by pressing Store key. Once data was properly stored in the non-volatile memory the LCD displays the 2 sec. flash message:
Notes : 1. A new parameter setting becomes effective when set, even before storing it in the non-volatile memory. Setting a parameter without storing, and moving to another page, will return the parameter to its previously stored value. 2. Any set-point parameters can be viewed, altered and stored at any time (provided that Parameters Lock set to No). However, it is not recommended to change and store parameters while motor is starting or running. 3. Any stored parameter is kept indefinitely in the non-volatile memory.
DATA SAVED OK
6
Reset - Press for more then 0.5 Sec. to cancel displayed Alarm or Trip (*). Short press on the RESET key will toggle the direction of massage display. At up direction a " __ " character is displayed at the bottom left hand side of the LCD. Pressing on Page key or leaving the keypad with no action for 10 Sec returns scroll direction to forward (down) direction. Notes: If "Parameters Lock" is set to Yes, parameters can be only viewed. When Parameters lock is set to No, it is possible to view, change and store any setting parameter.
Front Panel & LCD Displays 2. Pressing Store key while the LCD displays a header, will store this header as the default display. If no key is pressed for more than five minutes this header will be constantly displayed
Five types of information displays are available. 1. Parameter Settings By pressing Page key the LCD displays the following headers:
Returning to Factory Default Values
SYSTEM PARAMETER ***SETTINGS***
Press Page and display:
PROTECTION ***SETTINGS***
simultaneously, the LCD will *** SERVICE *** ***OPTIONS***
TRIPPING / ALARM ***OPTIONS***
Press Select key twice, the LCD will display: STORE NOW ? DEFAULT SETTINGS
2. Informative Data By continuing pressing Page the LCD displays the following headers:
Press Store and Page keys simultaneously, the LCD will display:
ACTUAL DATA - **** -
DATA SAVED OK
STATISTICAL DATA - **** -
Attention : Storing Default parameters erases all previously updated parameters.
3. Service Messages By pressing Page and keys the LCD displays the following header: *** SERVICE *** *** OPTIONS ***
Clearing Statistical Data Values Press Page and display:
simultaneously, the LCD will *** SERVICE *** ***OPTIONS***
4. Flash Messages Flash messages are displayed as a response to an event. For example, the flash message after storing is:
Press Select key three times, the LCD will display: CLEAR STATISTICAL DATA
DATA SAVED OK
Press Store and Reset keys simultaneously, the LCD will display:
5. Constant Messages Messages which are displayed upon fault. For example, when starting process is too long and MAX START TIME is enabled as Trip the following constant message will appear.
DATA SAVED OK Attention : Clearing statistical data erases all previously stored statistical data.
TRIP: MAX START TIME Alarm message for a missing Temperature sensor. Notes : 1. Pressing Store key while the LCD displays an "Actual Data" parameter, will store this parameter as default display. If no key is pressed for more than five minutes, this parameter will be constantly displayed.
7
Menu Configuration PAGE 1
PAGE 2
PAGE 3
PAGE 4
PAGE 5
SYSTEM PARAMETER *** SETTINGS ***
PROTECTION *** SETTINGS ***
TRIPPING ALARM *** OPTIONS ***
ACTUAL DATA -****-
STATISTICAL DATA -****-
SELECT
SELECT
SELECT
SELECT
SELECT
UPON INITIATION, the LCD Displays: I1= , I2 = TO REVIEW/MODIFY ALL PARAMETERS
, I3 =
PRESS
KEYS TO CHANGE PARAMETER VALUE
LINE FREQUENCY 50HZ
MAX START TIME 10 SEC
MAX START TIME TRIP: DISABLE
I1 82
MOTOR FLC 100 AMP
NUMBER OF STARTS 10
MAX START TIME ALARM: ENABLE
GROUND CURRENT 0 AMP.
CT PRIMARY 100 AMP
STARTS PERIOD 30 MIN
MAX START TIME AUTO RST: DSABL
T1 95
GND CT PRIMARY 100 AMP
#ST AUTO RST DLY 15 MIN.
MAX START TIME RELAY C: DISABLE
MOTOR LOAD CURR. 82 % OF FLC
LAST ALARM THERMAL LEVEL 1
TRIP INHIBIT OFF
U/C LEVEL 1 50 % OF FLC
MAX START TIME RELAY D: DISABLE
UNBALANCE CURR. 0%
TRIP I1 90 90
CONFIG TRIP DELAY TRIP
U/C LVL 1 DELAY 2 SEC
TOO MANY STARTS TRIP: DISABLE
THERMAL CAPACITY 20 % OF CAPACITY
TRIP GND CURRENT 0 AMP
CONFIG INPUT 1 REMOTE RESET
U/C LEVEL 2 40 % OF FLC
U/C LEVEL 1 TRIP: DISABLE
TIME TO TRIP-O/L NO TRIP EXPECTED
TRIP T1, T2, T3 125 128 127
CONFIG INPUT 2 REMOTE RESET
U/C LEVEL 2 DELAY 5 SEC.
U/C LEVEL 2 TRIP: DISABLE
TIME TO START 0 SEC.
TOTAL RUN TIME 10137.5 HOURS
CONFIG. ANLG OUT 4..20mA NORMAL
LOAD INCREASE 120 % OF FLC
LOAD INCREASED TRIP: DISABLE
CURRENT FLUCTAT 3 % OF FLC (not tested now)
TOTAL # OF START 1017
AN.OUT PARAMETER MOTOR LOAD CURR.
O/C LEVEL 1 – JAM 400% OF FLC
O/C LEVEL 1 - JAM TRIP: ENABLE
AN.OUT FUL RANGE 200 % OF FLC
O/C LVL 1 DELAY 2.0 SEC
O/C LVL 2 - SHORT TRIP: ENABLE
PARAMETERS LOCK NO
O/C LVL 2 – SHORT 800 % OF FLC
THERMAL LEVEL 1 TRIP: DISABLE
ADDRESS NUMBER 248
O/C LEVEL 2 DELAY 0.5 SEC.
THERMAL LEVEL 2 TRIP: ENABLE
BAUD RATE 19200
OVERLOAD PICKUP 105% OF FLC
UNBALANCE LVL 1 TRIP: DISABLE
S. LINK PAR. SAVE DISABLE
THERMAL LEVEL 1 80% OF CAPACITY
UNBALANCE LVL 2 TRIP: ENABLE
T6X TIME 10.0 SEC.
PHASE SEQUENCE TRIP: DISABLE
G/F DURING STRT 100 % OF FLC
HOT/COLD RATIO 50 %
GND FAULT LVL 1 TRIP: DISABLE
CH. 1 2 3 SENSOR PT100
COOL TIME FACTOR 5
GND FAULT LVL 2 TRIP: ENABLE
TEMP. 1 LEVEL 1 100 deg. C
UNBALANCE LVL 2 15 % OF FLC
COMM PORT FAILED TRIP: DISABLE
TEMP. 1 LEVEL 2 130 deg. C
UNBALANCE MIN T 5 SEC.
INTERNAL FAILURE TRIP: DISABLE
TEMP.2 LEVEL 1 TRIP: DISABLE
TEMP. 2 LEVEL 1 100 deg. C
U/B LVL 2 MAX T 30 SEC.
EXTERNAL FAULT 1 TRIP: DISABLE
TEMP. 2 LEVEL 2 TRIP: DISABLE
TEMP. 2 LEVEL 2 130 deg. C
GND FAULT LVL 1 5% OF FLC
EXTERNAL FAULT 2 TRIP: DISABLE
TEMP.3 LEVEL 1 TRIP: DISABLE
TEMP. 3 LEVEL 1 100 deg. C
G/F LVL 1 DELAY 10 SEC.
TEMP.1 LEVEL 1 TRIP: DISABLE
TEMP. 3 LEVEL 2 TRIP: DISABLE
TEMP. 3 LEVEL 2 130 deg. C
GND FAULT LVL 2 10 % OF FLC
TEMP. 1 LEVEL 2 TRIP: DISABLE
UNSTABLE CURRENT TRIP: DISABLE
UNSTABL CURRENT 5 % OF FLC
G/F LVL 2 DELAY 0.5 SEC.
8
I2 83
T2 97
I3 82
T3 96
A
LAST STRT PERIOD 5.5 SEC LAST START MAX I 550A
C
LAST TRIP THERMAL LEVEL 2
I2 I3 90
TOTAL # OF TRIPS 12
A
C
Menu Configuration
Press
Page
+
Key to enter Service Options mode
Page 1 *** SERVICE *** *** OPTIONS *** Select
Key to select the required parameters
Program Version MP3141003-Modbus
Press Store Now ? Default Settings Clear Statistical Data
Press
Page
+
Store
Key to Store Default Settings
Reset
+
Store
Key to Clear statistical Data
9
Parameter Settings SYSTEM PARAMETERS ***SETTINGS*** Parameter & Default Value
Description
Range
LINE FREQUENCY 50 HZ
Rated frequency
50 / 60 Hz
MOTOR FLC 100 Amp.
Motor Full Load (name plate) Current.
1 - 1000A
1A to 100A 5A above 100A
CT PRIMARY 100 Amp.
Primary rated current of Current Transformer.
1 - 1500A.
1A to 100A 5A above 100A
GND CT PRIMARY 100 Amp.
Primary rated current of Ground Fault Transformer.
1 - 1500A
1A to 100A 5A above 100A
Inhibits Trip command thus preventing opening of motor contactor when current exceeds a set value, to prevent contactor's damage. The fault must be cleared by an upstream circuit breaker or fuses. When contactors are not used (circuit breaker application) set to OFF. Note: Thermal Level 2 Trip overrides trip inhibit setting.
400-1000% of Motor FLC, OFF
10%
TRIP INHIBIT OFF
Increments
WARNING The MPR-6 will not protect the motor against high current above the current inhibit setting. It is the customer's responsibility to ensure that the motor is protected against fault current, above Current Inhibit by external protection. CONFIG. TRIP REL Trip CONFIG. INPUT 1 Remote Reset
Designation of Output Relay B as:
• Trip • Trip fail-safe • Remote Reset • Ext. fault 1 N/O
Designation of Input -1 as:
• Ext. fault 1 N/C CONFIG. INPUT 2 Remote Reset
• Remote Reset • Ext. fault 2 N/O
Designation of Input -2 as:
• Ext. fault 2 N/C • 0-20mA, 0-20mA Invert
CONFIG. ANLG OUT 0..20mA NORMAL
Choose Desired Output range (in mA)
AN.OUT PARAMETER Motor Load Curr.
Parameter for the analogue output ref.
AN.OUT FULL RANGE 200 % of FLC
Define the highest output of the ref. device
From 0-250% (in °C or mA), or % of Thermal Capacity (Respectively)
PARAMETERS LOCK No
Set to Yes to prevent parameter modification, parameter storing and Thermal Capacity reset.
No / Yes
MPR-6 Address on Serial Link. RS485 Allows a maximum of 32 MPR-6's on a twisted pair. For user convenience in programming the number of serial links is extended to 3 digits.
1-247, 248 = Off
BAUD RATE 19200
Serial Link communication speed in bps. Disconnect and then reconnect control supply after any change of baud rate.
1200, 2400, 4800, 9600,19200
S.LINK PAR. SAVE Disable
Enables / Disables to store setting parameters through serial link.
Disable / Enable
ADDRESS NUMBER 248
• 4-20mA, 0-20mA Invert
Motor Load Curr., Max. of I1-I3, I1, I2, I3, Ground Curr., T1, T2, T3, Min. of T1-T3, Max. of T1-T3, Thermal Capacity
10
1
Parameter Settings PROTECTION ***SETTINGS*** Parameter & Default Value
Description
Range
Increments
Maximum permitted starting time. End of starting is assumed when motor's current decreases below 110% of Overload Pickup value.
1 - 250 sec.
1 sec.
Maximum Permitted number of starts during "Starts Period". Auto Reset, when Enabled, occurs after "#St Auto Rst Dly" time has elapsed.
1 - 10
1
STARTS PERIOD 30 min.
Time period during which the number of starts is counted.
1 - 60 min.
1 min.
#ST AUTO RST DLY 15 min.
Auto reset (when enabled) delay after Too many starts faults.
1 - 60 min.
1 min.
U/C LEVEL 1 50 % of FLC
Under Current level-1 for a running motor. Fault occurs when current decreases below the set value for more than U/C Lvl 1 Delay.
10 - 90 % of Motor FLC.
1%
U/C LVL 1 DELAY 2 sec.
Under Current level-1 delay.
1 - 60 sec.
1 sec.
U/C LEVEL 2 40 % of FLC
Under Current level-2 for a running motor. Fault occurs when current decreases below the set value for more than U/C Lvl 2 Delay.
10 - 90 % of Motor FLC.
1%
U/C LVL 2 DELAY 5 sec.
Under Current level-2 delay.
1 - 60 sec.
1 sec.
Load Increase Alarm. Operative after start process ended (after current decreased below 110% of Overload pickup). Fault occurs when motors average current increases above the set value for more than 5 sec.
60 - 150% of Motor FLC
1%
Over Current Level-1. Stall / Jam protection, operative after end of starting process. Fault occurs when motors average current increases above set value for more than O/C Lvl 1 Delay.
100 - 500 % of Motor FLC.
10%
Time delay for over current level-1.
0.5 - 10 sec.
0.1 sec.
Over Current Level-2. Short circuit protection, operative during starting and running. Indicates that current exceeded set value for more than O/C Delay. Note: O/C Level 2" Trip is prevented when the highest of any of the line currents exceeds Trip Inhibit setting. It is designed to prevent opening of motor contactor under high short circuit conditions to protect it's contacts from being damaged.
400 - 1200 % of Motor FLC.
10%
Time delay for over current level -2. Note: When set to 0 actual delay is less than 90 mSec.
0 – 4 sec.
0.1 sec.
MAX. START TIME 10 sec.
NUMBER OF STARTS 10
LOAD INCREASE 120 % of FLC
O/C LEVEL 1 - JAM 400% of FLC
O/C LVL 1 DELAY 2.0 sec. O/C LVL 2-SHORT 800 % of FLC
O/C LEVEL 2 DELAY 0.5sec.
11
Parameter Settings
Parameter & Default Value OVERLOAD PICKUP 105 % of FLC
THERMAL LEVEL 1 80 % of Capacity
t6X TIME 10.0 sec. HOT/COLD RATIO 50 %
COOL TIME FACTOR 5 UNBALANCE LVL 2 15 % of FLC
Description
Range
Increments
Lower threshold for Thermal Level 1 / 2 protection. Thermal trip is not possible as long as current is below the set value. When current increases above the set value a trip will occur after a time delay that depends on the present value of the current level, the “Thermal Capacity” and on the t6x setting
60 – 130 % of Motor FLC.
1%
Simulation of motor’s thermal condition, stored in a thermal register. The “heating” of the thermal register (i.e. it’s increment) is related to the square of the current (the highest of the three line currents). The rate of “cooling” of the thermal register is directly related to motor’s present Thermal condition. Thermal capacity of 100% is equivalent to a motor running at the maximum allowed temperature. At this point the motor must be tripped (Thermal level 2). “Thermal Level 1” is adjustable from 50-99% of “Thermal Trip”. The following three parameters are used to calculate the “Thermal Capacity”.
50 – 99 % of max. thermal capacity.
1%
Overload trip time of cold motor at 6 times Motor FLC. (The time required to heat Thermal Capacity from 0 to 100% at 6 x FLC).
0.5 – 120 sec.
0.5
The ratio between thermal Capacity available for a hot motor and thermal capacity available for a cold motor. (A higher setting allows for a longer time before tripping hot motor due to high current).
20- 100% Thermal Capacity.
The Ratio between cooling time constant of stopped motor to the heating/cooling time constant of running motor.
1 – 15
Unbalance Current –The difference between maximum and minimum values of motors’ three line currents, divided by motors’ maximum current or motors’ FLC (this method prevents nuisance alarms at low currents). Fault occurs only if actual Unbalance is greater than the set value. See figure 6 for time delay. This parameter has no influence on unbalance level 2 time delay. Note: Unbalance Level 1 is automatically set to 50 % of Unbalance Level 2 setting.
of 1%.
1
10 – 40% see curve on page 15
UNBALANCE MIN T 5 sec.
Unbalance minimum time for both level 1 and 2. It is the time delay for Level 1. Level 2 cannot respond faster than this setting.
1 – 30 sec.
1 sec.
U/B. LVL-2 MAX T 30 sec.
Unbalance curve selection. Time delay at 10 % of Unbalance. Fault time inversely relates to the actual unbalance (See page 15).
20 – 120 sec.
1 sec.
GND FAULT LVL 1 5% of FLC
Ground fault current level-1. Fault occurs when Ground Current exceeds the set value for more than G/F Lvl 1 Delay.
1-100% of Motor FLC
1 %.
12
Parameter Settings
Parameter & Default Value
Description
Range
Increments
G/F LVL 1 DELAY 10 sec.
Ground fault current level-1 Delay.
1 – 60 sec.
1 sec.
GND FAULT LVL 2 10 % of FLC
Ground fault current level-2. Fault occurs when Ground Current exceeds the set value for more than G/F Lvl 2 Delay.
1-100% of Motor FLC
1%
G/F LVL 2 DELAY 0.5 sec.
Ground fault current level-2 Delay. Note: When set to 0 actual delay is less than 90 mSec.
0 - 2 sec.
0.1 sec.
G/F DURING STRT 100 % of FLC
During starting, both GND FAULT LVL 1 and GND FAULT LVL 2 are ignored. G/F DURING STRT is used instead..
1-100% of Motor FLC
1%
TEMP. 1 LEVEL 1 100 deg.C
Selects desired type of temperature sensors. NTC - Negative Temperature Coefficient PTC - Positive Temperature Coefficient PT100 - 100Ω RTD. Thermistor / PT100 change must be accompanied by internal dip switch settings. Choose the desired temperature set point for Sensor # 1Alarm.
• 0-250°C • 0.1-30KOhm
1°C 0.1KOhm
TEMP. 1 LEVEL 2 130 deg.C
Choose the desired temperature set point for • 0-250°C Sensor # 1 Trip. • 0.1-30KOhm
1°C 0.1KOhm
TEMP. 2 LEVEL 1 100 deg.C
Choose the desired temperature set point for • 0-250°C Sensor # 2 Alarm. • 0.1-30KOhm
1°C 0.1KOhm
TEMP. 2 LEVEL 2 130 deg.C
Choose the desired temperature set point for • 0-250°C Sensor # 2 Trip. • 0.1-30KOhm
1°C 0.1KOhm
TEMP. 3 LEVEL 1 100 deg.C
Choose the desired temperature set point for • 0-250°C Sensor # 3 Alarm. • 0.1-30KOhm
1°C 0.1KOhm
TEMP. 3 LEVEL 2 130 deg.cC
Choose the desired temperature set point for • 0-250°C Sensor # 3 Trip. • 0.1-30KOhm
1°C 0.1KOhm
UNSTABLE CURRENT 5% of FLC
Current fluctuation exceeding pre-set value Delay: 120 sec
1%
CH. 1 2 3 SENSOR PT100
13
• NTC Thermistor • PTC Thermistor • PT100
1-10% of Motor FLC
Parameter Settings Figure 4 - Overload Protection - Cold Motor 10000
Time (Sec)
1000
100
t6x=120 t6x=60 10
t6x=30
6
t6x=20
5 4
t6x=10
3 2
t6x=5 1 1
2
3
4
5
6
7
8
9
10
I/In
Figure 5 - Overload Protection - Hot Motor (hot/cold ratio = 0.5)
10000
Time (Sec)
1000
100
t6x=120 10
t6x=60
6 5
t6x=30
4
t6x=20
3 2
t6x=10
t6x=5
1 1
2
3
4
5
6
7
8
9
10
100
I/In
14
Parameter Settings Figure 6 - Unbalance Protection
Parameter: U/B LVL 2 Max Time (Sec)
1000
120 80 60 40
20
10
5 4 3 2
1 10
20
30
40
50
60
Actual Unbalan ce (% )
70
80
90
100
Unbalance Level Value Selection: Diagonal selected line intersects with the vertical axis at U/B LVL 2 MAX T, as set at Protection Settings page. Unbalance greater then Unbalance LVL 2 will Alarm / Trip after time delay that depends on the severity of the unbalance and the selected curve. Example: Assume that the user requires the MPR-6 to trip the motor at 40% Unbalance current after a delay of 5 sec. The intersection point of 5 sec and 40 % is on a diagonal line which intersects the X axis at 80 sec. Hence, set U/B LVL 2 MAX T parameter to 80 sec. Please note that at 60 % unbalance the MPR-6 will trip after approximately 2.5 sec. Unbalance LVL 2 parameter will set the lower threshold under which the MPR-6 will not trip.
Additional Protection Parameter & Default Value PHASE SEQUENCE No
EXTERNAL FAULT 1
EXTERNAL FAULT 2
INTERNAL FAILURE
Communication Port Failed
Description
Range
Fault occurs when the phase sequence is reversed. Phase sequence is tested only for short period after starting. Detection of wrong phase sequence accomplished in less then 0.5 Sec. Note: The phase sequence is designed to operate properly only in DOL starting. If for example motor is started by electronic soft starter, VFD, etc. Phase Sequence protection must be set to Off.
Yes / No
If config. input 1 is set to Ext. Fault 1 N/O then Fault occurs when In.1 and common input terminal contact closes. If config. input 1 is set to Ext. Fault 1 N/C then Fault occurs when Programmable Input-1 contact opens. If config. input 2 is set to Ext. Fault 2 N/O then Fault occurs when Programmable Input-1 contact closes. If config. input 2 is set to Ext. Fault 2 N/C then Fault occurs when Programmable Input-1 contact opens. The MPR-6 incorporates a built in Test program. The test program is constantly running in the background. Fault occurs when the MPR-6 detects an internal fault. Fault occurs when the MPR-6 detects three consecutive transmissions from the host computer, in which a parity bit, and/or the CRC word are wrong. Auto reset, when Enabled, occurs when a transmission from the host computer is received properly.
15
Trip / Alarm Options Protection function Each of the MPR -6 Protection has five setting: 1. Trip 2. Alarm 3. Auto Reset 4. Relay C 5. Relay D
External Faults External Fault 1 occurs when input 1 is set as “External Fault 1 NO” and the MPR detects a closed circuit between In.1 and common input terminals. External fault 1 occurs when Input 1 is set as “External Fault 1 NC” and the MPR detects open circuit between the “In1” and the “Common” input terminals.
With this five setting any the MPR-6 protection can be assigned to each of the following functions : 1. Trip only 2. Alarm only 3. Alarm and Trip 4. Disabled 5. Enabling Auto Resetting 6. Operating Aux relay C 7. Operating Aux relay D
More than One Alarm or Trip. The MPR-6 is designed to accept and store the first Alarm it detects. If this alarm has not been reset and an additional alarm occurs, the MPR-6 will not display the second alarm on the LCD nor assign it to the Fault Data page. Example: If "Unbalance Level 1" occurs and then a "Thermal Level 1" occurs, the MPR-6 will continue displaying "Unbalance Alarm" message on both LCD and Statistical Data page. This is to assist the user in establishing the cause of the alarm. In case a trip occurs after an alarm, the trip message will override the alarm message.
When Trip only is required 1. Set Trip: Enable, Alarm: Disable. Upon fault: • Trip LED illuminates. • Trip relay: if designated as "Trip", energizes. if designated as "Trip-Fail Safe", de-energizes. • Relays C and/or D (if assigned to function in this fault) energize.
Resetting Reset after fault can be either through the Reset key on the front panel or remotely through Input -1 or 2, when designated as Remote Reset, or through the Serial link.
2. When Alarm only is required set Trip: Disable, Alarm: Enable. Upon fault: • Alarm LED illuminates. • Alarm relay: De-energizes (fail-safe operation) • Aux relay C and/or D (if assigned to function in this fault), energize.
The MPR-6 can also be assigned to have Auto Reset Auto Reset - When required set "Auto Rst: Enable" If not required set "Auto Rst: Disable" The MPR-6 resets itself automatically when the fault cause disappears. The Auto Reset is activated after a 2 sec. delay. Note: It is recommended to avoid unnecessary Autoreset
3. When Alarm and Trip are required set Trip: Enable, Alarm: Enable. Upon fault: • Trip and Alarm LEDs illuminate. • Trip relay: if designated "Trip", energizes. if designated to "Trip-Fail Safe", de-energizes. • Alarm relay: De-energizes (fail-safe operation) • Aux relays C and/or D (if assigned to function in this fault) , energize.
On some faults, when Auto Reset is enabled, the MPR-6 trips and after a 2 sec. delay resets itself automatically. The fault message on the LCD disappears after 2 sec. Example: On "U/C Level 2", when Auto Reset function is Enabled, the contactor opens. After 2 sec. automatic Reset occurs. The motor stops and the "U/C Level 2" message is displayed for only 2 sec.
4. To Disable this protection set Trip: Disable, Alarm: Disable
Thermal Capacity Reset method (to enable emergency restart) Due to the importance of the Thermal protection a different reset method is used. Thermal Capacity fault can be reset only from the front panel Reset key. It is not possible to reset this fault through Input-1 or Input-2 and not through the communication. It is impossible to reset a "Thermal Level 2" condition until "Thermal Capacity " has reduced bellow 50%. If urgent starting is needed (while parameters lock=N0), before thermal capacity has reduced below 50%, press Reset key. The LCD will display: "Reset Thermal Capacity??? Pressing Reset key again after 1 second resets the Thermal Capacity.
5. Operating Aux relay C The relay can be assigned for one or more of the 20 faults. It will operates for a certain fault only if Trip or Alarm are enabled. 6. Operating Aux relay D The relay can be assigned for one or more of the 20 faults. It will operates for a certain fault only if Trip or Alarm are enabled.
16
Setting Summary
Protection Settings
System Parameters Settings
The following table summarizes the ranges and factory default settings for each of the parameters. New settings can be marked in the empty spaces ( ). In this table, (+) stands for "Enabled", (-) for "Disabled" and - to not applicable. Motor Number (___________) Application Name (____________________________________________) Parameter Default Function Name Range Field Settings No. Settings 1
Line frequency
50-60Hz
50HZ
2
Motor FLC
1-1000A
100A
3
C/T Primary
1-1000A
100A
4
GND C/T Primary
1-1000A
100A
5
Trip Inhibit
400-1000% FLC, Off
Off
6
Config. Trip Relay
Trip/Trip - Fail-safe
Trip
7
Config Input 1
Reset, Ext Fault N.O or N.C
Reset
8
Config Input 2
Reset, Ext Fault N.O or N.C
Reset
9
Config. Anlg Out
10
An. Out Parameter
11
An. Out Ful Range
10..250 % of FLC (message changes according to an. Out Parameter setting).
200% of FLC
12
Parameters lock
Yes / No
No
13
Address No
1-247, 248=Off
248
14
Baud Rate
1200-19200
19200
15
S.Link Par. Save
Disable, Enable
Disable
21
Max Start Time
1-250 sec
10 sec
22
No of Starts
1-10
10
23
Starts period
1-60 min
30 min
24
#St Auto Rst Dly
1-60 min
15 min
25
U/C Level 1
10-90% FLC
50 %
26
U/C Level 1 delay
1-60 sec
2 sec
27
U/C Level 2
10-90% FLC
40 %
28
U/C Level 2 delay
1-60 sec
5 sec
29
Load Increase
60-150% FLC
120 %
30
O/C Level 1- (Jam)
100-500% FLC
400 %
31
O/C Level 1 delay
0.5-10 sec
2 sec
32
O/C Level 2 - (Short)
400-1200% FLC
800%
33
O/C Level 2 delay
0-4 sec
0.5 sec
34
Overload pickup
60-130% FLC
105 %
35
Thermal Level 1
50-99% FLC
80 %
36
t6x (curve selection)
0.5-120 sec
10 sec
37
Hot to Cold Ratio
20-100%
50 %
38
Cool Time Factor
1-15
5
39
Unbalance Level 2
10-40% of FLC
15%
40
Unbalance Min T
1–30 sec
5 sec
41
U/B Level 2 Max T
20-120 Sec
30 sec
0-20mA normal,4-20mA normal,0-20mA inverted, 4-20mA inverted Motor Load Current, Max of I1,I2,I3, I1, I2, I3, Ground Current, T1,T2,T3, Min. of T1,T2,T3, Max. of T1,T2,T3, Thermal Capacity,
17
Motor Load Current
Setting Summary 42
G/F Level 1
1-100% FLC
5%
43
G/F Level 1 delay
1-60 sec
10 sec
44
G/F Level 2
1-100 % FLC
10 %
45
G/F Level 2 delay
0-2 sec
0.5 sec
46
G/F During Strt
1 – 100 % of FLC
100 %
47
CH 123 Sensor
NTC, PTC, PT100
PT100
48
Temp. 1 Level 1
0.1-30K / 1-250°C
10K / 100°C
49
Temp. 1 Level 2
0.1-30K / 1-250°C
13K / 130°C
50
Temp. 2 Level 1
0.1-30K / 1-250°C
10K / 100°C
51
Temp. 2 Level 2
0.1-30K / 1-250°C
13K / 130°C
52
Temp. 3 Level 1
0.1-30K / 1-250°C
10K / 100°C
53
Temp. 3 Level 2
0.1-30K / 1-250°C
13K / 130°C
54
Unstable Current
1-10 % FLC
5%
18
Setting Summary Trip/ Alarm Options: Protection Description
Trip Dflt
New
Alarm Dflt
Auto Reset
New
Dflt
New
Relay C Dflt
New
Relay D Dflt
New
ANSI Code Standards
1
Max Start Time
-
+
-
-
-
48
2
Too Many Starts
-
-
-
-
-
66
3
U/C Level 1
-
+
-
-
-
37
4
U/C Level 2
-
-
-
-
-
37
5
Load Increased
-
+
-
-
-
51L
6
O/C Level 1-Jam
+
+
-
-
-
51R
7
O/C Lvl 2 - Short
+
+
-
-
-
50
8
Thermal Level 1
-
+
-
-
-
49S/51
9
Thermal Level 2
+
+
-
-
-
49S/51
10
Unbalance Lvl 1
-
+
-
-
-
46
11
Unbalance Lvl 2
+
+
-
-
-
46
12
Phase Sequence
-
-
-
-
-
47
13
GND Fault Lvl 1
-
+
-
-
-
50G, 64
14
GND Fault Lvl 2
+
+
-
-
-
50N, 64
15
Comm. Port Fail
-
-
+
-
-
3
16
Internal Failure
-
+
-
-
-
---
17
External Fault 1
-
-
-
-
-
---
18
External Fault 2
-
-
-
-
-
---
19
Temp.1 Level 1
-
-
-
-
-
49R
20
Temp.1 Level 2
-
-
-
-
-
49R
21
Temp.2 Level 1
-
-
-
-
-
49R
22
Temp.2 Level 2
-
-
-
-
-
49R
23
Temp.3 Level 1
-
-
-
-
-
49R
24
Temp.3 Level 2
-
-
-
-
-
49R
25
Unstable Current
-
-
-
-
-
---
Note: Disable = “-“, Enable = “+”
19
Actual Data
To enter Actual Data press Page key until Actual data header is displayed Note: Values given below are examples only. ACTUAL DATA - ???? Parameter & Example Value
Description
Range
I1 I2 I3 345 343 346 A
Line (motor) currents.
1A - 12KA.
GROUND CURRENT 0 Amp.
Ground fault current.
1A - 12KA
T1 95
RTD Measured °C / Thermistor measured resistance. Note: if Thermistor/RTD is not connected LCD shows: ?????
RTD 1-250°C Thermistor 0.1- 30K
MOTOR LOAD CURR. 90 % of FLC
Motor current as a percentage of Motor FLC.
0 - 1200% FLC
UNBALANCE CURR. 1%
Unbalance current, the difference between max. and min. of motor's three line currents, related to the larger between motor's max. line current and Motor FLC.
0 - 100%
THERMAL CAPACITY 20% of Capacity
Thermal register capacity. Trip level = 100%
0-250% of max. Thermal Capacity
TIME TO TRIP- O/L No Trip Expected
Expected time to trip (reaching 100% Thermal Capacity) at the present current value.
No trip expected, 0 - 4 hours
Expected time to re-start is displayed on the LCD in one of the following cases: * After "Thermal Trip" - in this case it is the expected time of the Thermal Capacity to decay to 50% of its the maximum "Thermal Capacity". * After "Too Many Starts" Trip - it is the time until Auto Reset will be performed (if enabled)
After "Thermal Trip": 0 - ... minutes After "Too Many Starts" : 1 - few hours.
Current fluctuation exceeding pre-set value Delay: 120 sec
1 - 10%
T2 93
T3 96
°C
TIME TO START 0 sec.
CURRENT FLUCTUAT 5%
20
Statistical Data STATISTICAL DATA - ???? Parameter & Example Value
Description
Range
LAST STRT PERIOD 5.6 sec.
Last start time duration.
0-255 seconds.
LAST START MAX I 550 amp.
RMS maximum current (highest of three phases) during last start.
0-24000 amp.
LAST TRIP Temp. 1 Level 2
Last active fault that was Enabled as a Trip.
all 20 faults
LAST ALARM Temp. 1 Level 1
Last active fault that was Enabled as an Alarm.
all 20 faults.
TRIP I1, I2, I3 110 112 109 A
Values of three line (motor) currents before last trip.
0-12000 amp.
TRIP GND CURRENT 0 amp.
Values of Ground Fault current before last trip.
0-12000 amp.
TRIP T1,
Values of thermal sensors before last trip. R1-R3 for Thermistors and T1-T3 for PT100 RTDs
RTD 1-250°C Thermistor 0.1- 30K
TOTAL RUN TIME 10137.5 hours
Total run time since commissioning.
0-60,000 hours.
TOTAL # OF START 1017
Total number of starts since commissioning.
0-65535
TOTAL # OF TRIPS 12
Total number of trips since commissioning.
0-65535
125
123
T2,
T3
126
°C
21
Test Messages SERVICE ??? OPTIONS ??? Parameter & Example Value
Description
PROGRAM VERSION MP3171003-Modbus
Program version description.
STORE NOW ? Default settings
Stores All factory default parameters in the non-volatile memory. Press Store and Set Page keys simultaneously, to store. "Data Saved Ok" message will be displayed for about two seconds.
CLEAR Statistical Data
Resets and stores "0" for all the statistical data. Press Reset and Store keys simultaneously, to reset and store zero values in the non-volatile memory. The parameters are: Total run time, Total # of starts, Total # of trips, Last start period, Last start peak I, Trip I1, I2, I3, Trip GND current, Trip T1,T2,T3, Thermal capacity “ Data Saved OK" message will be displayed for about two seconds.
Warning Resetting Statistical Data resets all previous statistical data values ! ! ! The last two actions (default storing and resetting statistical data ) should be done with care, since retrieving previous set-point parameters or statistical data is impossible.
22
Flash & Constant Messages Flash Messages The message is displayed for a short while only. Display than returns to the previous message. Flash messages are usually displayed as a response to an operator action. It is used either to confirm activation of the requested operation, or to indicate reason for not doing so. Parameter & Example Value
Description
DATA SAVED OK
Displayed after pressing Store key. If an error is found during store process, then next message is shown.
STORAGE ERROR
Displayed when an error is found in the store process.
WRONG PARAMETERS
Displayed after power-up, if the non-volatile parameter check sum is found to be wrong.
UNAUTHORIZED ACCESS
Displayed when Parameters lock is set to yes, and a parameter change is attempted. Also displayed after Unauthorized Store action.
RESET THERMAL CAPACITY ???
Displayed as a response to pressing Reset key while parameters lock is set to No. It indicates that a second press on Reset key after 1 Sec. will reset thermal capacity to 0. Note : This should be done with care !! Resetting Thermal Capacity may prevent the MPC from tripping for thermal overload while justified
THERMAL CAPACITY RESET PERFORMED
Displayed after second press on Reset Key, as explained in the previous message.
INTERNAL FAILURE
Displayed as a response to finding an error during an Internal Test.
Constant Messages Displayed, as a response to an event and not as a result of an operator action. Parameter & Example Value
Description
ALARM THERMAL LEVEL 1
Displayed when the Alarm LED illuminates. The lower line displays the fault name.
TRIP THERMAL LEVEL
Displayed when the Trip LED illuminates. The lower line displays the fault name.
23
Communications Communications Manual is supplied upon request The MPR-6 incorporates RS485 serial link and uses a Modbus RTU protocol (The protocol is not included in this document) to provide high-speed data acquisition to supervisory computers. Data formats have been carefully structured to provide fast notification of alarms and continuous updates of performance parameters. Load control can be performed from host computers or by PLCs. The following can be performed through the communication. • Read and modify all MPR-6 Settings • Read all Actual and Statistical Data parameters • Reset System security is exceptionally high, meeting the highest standards of protected communication in the industry. Included in each message is a 16 bit CRC.
Small System Up to 32 MPRs can be connected to the PLC or host computer via a twisted shielded pair. Note: Terminate serial link cable with 120-Ohm resistors at both ends. The MPR-6 system is user expandable. No special engineering skills or tools are required. For larger systems a Data Highway enables multiple MPR-6 connection. The system also performs high-speed data acquisition Users therefore have a simple and friendly means of building a fully integrated monitoring and control systems An optional basic communication package is available. The package includes: 1. Parameter Reading and Programming Software 2. Connection cable and RS-232 to RS-485 Converter 3. Modbus Communication Manual
RS-232 to RS-485 Converter
For programming and supervision of single units via a PC/Laptop or compatible. MP
R
Mo -6
db
MP
us
Co
R -6
Twisted Shielded Pair
24
m
n mu
ic a
tio
n
SET-PRO Software
Technical Specifications Auxiliary Power Supply 230VAC (165 - 260V), 115VAC (88 - 125V), (to be specify). 45 to 65Hz. Consult factory for universal AC/DC power supply. Power consumption: ≤ 10VA Current Measurement (three currents) Method : True rms, sample time 0.5mS. Range: 0.05 to 12 * phase CT Primary amps setting. Full scale: 12 * phase CT Primary amps setting. Accuracy : ± 1.5% , for 0.9 to 1.5 * CT Primary amps setting. ± 5% above 1.5 * CT Primary ± (3% + 0.02 * CT Primary) below 0.9 * CT Primary Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100mΩ) ≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20mΩ) Ground Fault Current measurement (one current) Method : True RMS, sample time 0.5mS. Range: 0.05 to 1.0 * E/F CT Primary amps setting. Full scale: 1.0 * E/F CT Primary amps setting. Accuracy : ± 3% of full scale. Power consumption: ≤ 0.1VA per 1A at 1Amp. input, (Input impedance ≤ 100mΩ) ≤ 0.5VA per 5A at 5Amp. input, (Input impedance ≤ 20mΩ) Thermistor Input Range: Accuracy: Time Delay
0.1 - 30KΩ. ± 0.1KΩ up to 5KΩ, ± 3% above 5KΩ. 2 Sec.
RTD Input Range: 100 - 240Ω or 0°C - 250°C Accuracy: ± 3% of resistance. Max wire resistance: 25Ω. Time Delay 2 Sec.
Overload Alarm and Trip Curves (both heating and cooling) Fault time accuracy: ± 1 Second up to 10 seconds. ± 1 second ± 2% above 10 seconds. Threshold current level : OVERLOAD PICKUP ± 1.5%. Total Run Time Accuracy:
±2%.
Current Unbalance Alarm and Trip Method: Unbalance = 100 * (Imax - Imin) / Ir [%] Where: Imax = max. of the three phase currents. Imin = min. of the three phase currents. Ir = larger of (Imax , Motor FLC setting). (to prevent nuisance tripping at low current levels) Alarm Threshold unbalance alarm level: 50% of Unbalance Current setting ± 2%. Alarm (fixed) time delay: 1.0 ± 0.5 Sec. Trip Curves Threshold unbalance trip Level: Unbalance Current setting ± 2%. Trip time accuracy: ± 1 Second up to 10 seconds. ± 1 second ± 2% above 10 seconds.
25
Technical Specifications Fault Time Delays Accuracy:
±0.5 Sec. or ±2% of time, which ever is greater, for all but the above mentioned faults and the following exceptions: - O/C Level 2: -0.1/+0.2 Sec. for less than 1Sec. delay.* - Ground Fault Level 2: -0.1/+0.2Sec. for less than 1Sec. delay.* * When adjusted to 0 60 טmS ± 30mS.
Relays Contacts Rated load: 8A/250VAC 1800VA. Maximum voltage: 250VAC.
48Vdc, 0.25A Inductive 125Vdc, 0.15A
48Vdc, 1.0A Resistive 125Vdc, 0.4A
Dielectric Strength 1500VAC, for 1 minute, Between Ground (terminal 18) and: * Current inputs. * Auxiliary power supply inputs * Control terminals Temperature Range 0°C to +50°C (default - all units), -10°C to +60°C (by special order) Standards Impulse : Meets IEC 255-4 (1976) & Amend #1 (1979) Meets IEC 255-5 (1977) 5 kV common-mode test 5 kV transverse-mode test Surge withstand : Oscillatory 2.5 kV peak Fast transient 4 kV crest voltage In accordance with: ANSI C37.90.1 (1990), IEC 55-4 (1976) & Amend #1 (1979) Class III, IEC 255-22-2 (1988) Class III RFI :
In accordance with EMI standard ANSI C37.90.2
26
Dimensions (mm)
96
86.4
144
Cut-O ut
107
92
138
C:\WINDOWS\Desktop\MPR-6-3-Instruction Manual-27-07-2003.doc
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