Specification

P.O. Box 4544 CH-6304 Zug / Switzerland Physical Address:

Dammstrasse 16 CH-6300 Zug / Switzerland Phone Fax Date

April 2014

V2

+41-41-724 24 48 +41-41-724 24 25

Author

Phone direct / E-Mail

Horst Adams

+41-41-724 24 48 [email protected]

HYDROCAL 1003 Transformer Online Monitoring System with Gas-in-Oil and Moisture-in-Oil Measurement Application System should continuously monitor and analyse the key fault gases of power transformers, Hydrogen (H2) and Carbon Monoxide (CO) as well as analysis of Moisture (H2O) dissolved in transformer oil. The system should also offer additional monitoring functions for other transformerspecific information, such as voltage, current, oil and ambient temperatures, tap changer positions, etc.

Technical specification Measuring quantities

Measuring range

Measuring accuracy

Hydrogen H2 Carbon Monoxide CO

0 ... 2000 ppm 0 ... 2000 ppm

± 15 % of the measuring value ± 25 ppm ± 20 % of the measuring value ± 25 ppm

Moisture in Oil H2O

absolute 0 ... 100 ppm

± 3 % of the measuring value ± 3 ppm

Gas measurement principle

H2: Micro-electronic gas sensor CO: Electro-chemical measurement cell

Moisture measurement principle

Thin-film capacitive moisture sensor (relative [%] and absolute [ppm])

Gas extraction method

Diffusion principle with gas-permeable TEFLON® membrane

Measurement interval

20 min.

Operation temperature

Oil temperature Ambient temperature Storage temperature Temperature coefficient

Oil pressure Functions

0 … 800 kpa, no negative pressure allowed Individual gas in oil concentration measurement of H2 and CO Gas trend analysis (chart / bar diagram) Free configurable alarm levels

-20°C ... +90°C -50°C ... +55°C (below -10°C display function locked) -20°C ... +65°C 1%/K

Page 2 / 5 April 2014 Specification HYDROCAL 1003 Outputs

4 x Analog outputs 12 x Digital outputs

4 x 0/4 ... 20mA DC (free assignment) 4 x Relay ouputs (220 VDC/VAC / 2 A / 60 W) (free assignment) 8 x Optocoupler outputs

Alarms

H2 Alarm (H) H2 Daily trend H2 Weekly trend CO Alarm (H) CO Daily trend CO Weekly trend H2O Alarm (H) H2O Daily trend H2O Weekly trend

1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm 1st level and 2nd level alarm

Inputs

8 x Analog DC inputs 4 x Analog inputs

0/4 ... 20 mA DC

4 x Analog inputs

0/4 ... 20 mA DC or 0 ... 10 V DC (configurable by jumpers)

Storage capability Communication

Protection class Power supply

4 MB RS 232 - Serial interface with external connector (Proprietary or MODBUS® RTU/ASCII protocol) RS 485 (proprietary or MODBUS® RTU/ASCII protocol) ETHERNET 10/100 Mbit/s modem (Option) Copper-wired / RJ45 or fibre-optical / SC duplex connector (Proprietary protocol) Internal GSM Modem with external adhesive antenna (Option) (Proprietary protocol) On-board analog modem (Option) (Proprietary protocol) DNP3 serial modem with RS 485 connection (Option) (DNP3 protocol) IP 55 110 V (120 V) -20% +15% AC 50/60 Hz 1) or 220 V (240 V) -20% +15% AC 50/60 Hz 1) or 110 V (120 V) -20% +15% DC 1) or 220 V (240 V) -20% +15% DC 1) Other nominal voltages on request! Note: 1)

110 V (120 V)  110 V -20% = 88 Vmin (120 V) +15% = 138 Vmax 220 V (240 V)  220 V -20% = 176 Vmin (240 V) +15% = 276 Vmax

Dimensions

approx. W 224 x H 224 x D 307.5 mm

Weight

approx. 7.5 kg

Page 3 / 5 April 2014 Specification HYDROCAL 1003 Functions

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System Set-Up and System Mounting

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System should permanently analyze the individual gases (no composite value) of the transformer key fault gases such as Hydrogen (H2) and Carbon Monoxide (CO) System should permanently analyze absolute Moisture (H2O) in oil of transformer System should be equipped with min. 8 analog inputs for other transformer specific measuring functions, e. g. load current, voltage, moisture in oil, top and bottom oil temperature, ambient air temperature, OLTC motor drive power, tap changer position, etc. System should be capable to carry out additional calculations based on measurements from the analogue inputs, e. g. the calculation of the hot spot temperature, loss of life and the aging rate (acc. IEC 60076-7) System should be capable to set alarm levels (both Hi-1st level and HiHi-2nd level) for all quantities. The detection of an alarm should be signalled via an integrated display of the system, via digital alarm outputs and automatically via modem to a central PC System should be equipped with a memory of min 4 MB Flash for the permanent recording of the H2, CO and H2O contents, the status / values of all connected external sensors and for all appeared alarm situations. As the recording intervals for external sensors should be free configurable the system should calculate the approximate recording time for the actual configuration in order to allow the operator to adapt the regular read-out intervals System should be equipped with a large graphical liquid crystal display (LCD) of min. 320 x 240 pixels. The LCD display should be backlit for clear reading at night Operation should be possible via display and keypad as well as using PC user software (remote and direct). For easy installation and data access both gas in oil analysis of Hydrogen (H2) and Carbon Monoxide (CO) and analogue inputs for transformer monitoring should be integrated into one unit. System should be integrated into aluminium, powder painted housing with protection degree IP 55 against water and dust entry In order to sustain the heavy EMC conditions near high-voltage (HV) installations internal CPU, memory and I/O electronics should be equipped with an additional internal EMC shielding System should directly be mounted to a G 1½" DIN ISO 228-1 or 1½” NPT ANSI B 1.20.1 valve on the transformer. There should be no external tubes from/to the system to transport oil samples from/to the system as those tubes may break and may cause loss of transformer oil and subsequently severely cause transformer damages and power supply interruptions The system should not be equipped with any moving parts (e. g. pump for oil circulation), but use natural oil convection of the transformer.

Page 4 / 5 April 2014 Specification HYDROCAL 1003 System firmware

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Manual operation should be supported by function, navigation and alphanumerical buttons. System firmware of the system should possess a customer-friendly graphical-oriented operation that should make handling and operation easy even for the operator without English language skills System firmware should display all logged historical and actual measuring results in graphical and table form. Alarm configuration and handling as well as modification of system parameters should be possible on-site via manual operation even without PC. System firmware should be equipped with a menu displaying the transformer administration data, e.g. name and address of the site, name and type of the transformer as well as other information from the transformer name plate System firmware should possess a gas-in-oil analysis menu showing for both gases Hydrogen (H2) and Carbon Monoxide (CO) as well as for Moisture (H2O) for the actual and historical measurements in either tabular or graphical (chart diagram) form System firmware should possess a transformer monitoring and management (TMMS) menu showing the actual and historical measurements of externally connected sensors in tabular and graphical (chart diagram) form. The user should be able to freely set-up the system configuration including measurement interval, transducer details etc. In case of connected sensors for voltage, current, oil and ambient temperatures the System firmware should also possess a menu to calculate the aging rate, the loss of life and the hot spot temperature of the transformer acc. to the standards IEC 60076-7 System firmware should possess an alarm menu displaying all active and historical alarms. The alarm menu should allow for the confirmation of alarms System firmware should be equipped with a configuration menu allowing direct modification on site of the most important system parameters, e. g. alarm levels, input allocations and communication settings System firmware should possess a DGA adjustment function allowing inputting last lab results of DGA analysis.

Page 5 / 5 April 2014 Specification HYDROCAL 1003 System PC-Software

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 Communications

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System PC-software should be user-friendly. All text information / text messages of the system PC-software must be in English language System PC-software should handle a network of various transformers and installed gas-in-oil analysis systems with transformer monitoring and management (TMMS) functions The software operator should be able to enter new transformers incl. site and administration information and add them to the existing database. System PC-software should automatically carry-out systematic readout of a network of installed transformers / systems at intervals that can be freely configured. System PC-software should possess all display, alarm handling and system configuration functions as are included in the system firmware System PC-software should be able to transfer all measurement results (both gas-in-oil analysis of hydrogen H2 and carbon monoxide CO, moisture H2O and external additional sensors into standard data structures, e. g. CSV or MICROSOFT  EXCEL System PC software should possess a DGA adjustment function allowing the input of last lab results of DGA analysis. The system should be equipped with integrated standard interfaces RS 232 and RS 485 (half-duplex mode) The RS 232 interface must be directly accessible without opening of the cover of the system. The external connector must possess a protective cover in order to maintain the IP 55 protection degree of the system The system must be equipped with an optional on-board or internal modem for remote communication. There must be on-board / internal modems available for communication via GSM/GPRS network, Ethernet, DNP3 serial as well as for analog telephone networks In order to sustain the heavy EMC conditions near high-voltage (HV) installations the on-board modems must be integrated into that internal compartment that is equipped with an additional internal EMC shielding The communication system should allow connecting more than one unit (up to 31 units) through MODBUS® RTU/ASCII, DNP3 or proprietary protocols.