OFF CIRCUIT TAP CHANGERS FOR THREEPHASE DISTRIBUTION TRANSFORMERS ( TYPE KDR )

GENERAL SPECIFICATION These tap changers are available in one, two or three phase applications. Multi layer types are also available.

VOLTAGE CLASS

The shaft length is fixed as 50, 70,100 or 130 mm. Driving mechanism can be either on the edge or in the middle of the phases. Connection diagrams in page KDR 2 can be applied in any variation to all types. Easy assembly and compact design provides labor and cost savings.

ASSEMBLY A notch is provided to mark each position. For operation, unscrew and release the notch by applying an axial pull on the control knob. Then turn the knob to the desired position. Engage the knob and screw the lock nut. This process is clearly marked on control knob as;

VOLTAGE CLASS

B.I.L.

15 kV

95 kV

20 kV

125 kV

30 kV

170 kV

Other B.I.L. values are also available upon customer request.

“ I LIFT – II TURN – III SWITCH ON “ This description can be engraved in any language.

MATERIALS Steel Parts : These parts can be stainless or mild steel. Mild steel parts are cadmium or zinc plated. Upon request galvanizing is also available. Polyamide Parts : These parts are NYLON 66, superior mechanical properties against all acting forces, strong against UV lights. Aluminum Parts : GAlSi12Cu Brass Parts : CuZN40Pb2 Ms 60 F34 DIN 17673 Copper Parts : E-Cu F25 DIN 40500 Insulator Parts : Paper phenol-plastic resin based laminates, HP 2061.5 class of DIN 7735. ON REQUEST The aluminum parts can be protected by anodic oxidation. The mild steel parts can be supplied in stainless steel. The brass and copper parts can be tin, silver or cadmium plated.

CURRENT CURRENT

CONTACT INNER DIA. (For cable connection)

10 A

φ 2,1 mm.

30 A

φ 3,1 mm.

63 A

φ 5,1 mm.

KDR 1 / A

TYPE KDR THREEPHASE TAP CHANGER Usual diagrams

KDR 2 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil Delta diagram 20-30 kV 30-63 A 3-7 positions Setting 2.5 % per position

18 18 18

L

50

L

70

100

130

Number of Positions 3 4 5 6 7

Number of Positions 3 4 5 6 7 3 4 5 6 7 3 4 5 6 7

A 347 401 455 509 563

A 347 401 455 509 563 347 401 455 509 563 347 401 455 509 563

18 18 18

10A Unit No. C209331 C209332 C209333 C209334 C209335

20kV 30A Unit No. C209351 C209352 C209353 C209354 C209355

63A Unit No. C209371 C209372 C209373 C209374 C209375

10A Unit No. D209331 D209332 D209333 D209334 D209335 E209331 E209332 E209333 E209334 E209335 F209331 F209332 F209333 F209334 F209335

20kV 30A Unit No. D209351 D209352 D209353 D209354 D209355 E209351 E209352 E209353 E209354 E209355 F209351 F209352 F209353 F209354 F209355

63A Unit No. D209371 D209372 D209373 D209374 D209375 E209371 E209372 E209373 E209374 E209375 F209371 F209372 F209373 F209374 F209375

18 18 18

A 422 476 530 584 638 422 476 530 584 638 422 476 530 584 638

10A Unit No. D209531 D209532 D209533 D209534 D209535 E209531 E209532 E209533 E209534 E209535 F209531 F209532 F209533 F209534 F209535

30kV 30A Unit No. D209551 D209552 D209553 D209554 D209555 E209551 E209552 E209553 E209554 E209555 F209551 F209552 F209553 F209554 F209555

63A Unit No. D209571 D209572 D209573 D209574 D209575 E209571 E209572 E209573 E209574 E209575 F209571 F209572 F209573 F209574 F209575

J K

C E I

10A 2.1 4

30A 3.1 5

20kV 55 55 55

63A 5.1 7

30kV 80 80 80

KDR 3 / B

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil Delta diagram 30 kV 30-63 A 3-7 positions (*) Setting 2.5 % per position

L

100

130

Number of Positions 3 4 5 6 7 3 4 5 6 7

A 449 512 575 638 701 449 512 575 638 701

30A

63A

Unit No.

Unit No.

1E209551 1E209552 1E209553 1E209554 1E209555 1F209551 1F209552 1F209553 1F209554 1F209555

1E209571 1E209572 1E209573 1E209574 1E209575 1F209571 1F209572 1F209573 1F209574 1F209575

30A

63A

J

3.1

5.1

K

5

7

(*) Special type with 21mm distance between contacts for 30 kV.

KDR 4 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Star diagram 20-30 kV 10-30 A 3-5-7 positions. Setting 2.5 % per position

L

70

100

130

Number of Positions

A

3 5 7 3 5 7 3 5 7

347 456 564 347 456 564 347 456 564

20kV Unit No. 10A D219361R D219363R D219365R E219361R E219363R E219365R F219361R F219363R F219365R

Unit No. 30A D219361P D219363P D219365P E219361P E219363P E219365P F219361P F219363P F219365P

A 455 563 671 455 563 671 455 563 671

30kV Unit No. 10A D219561R D219563R D219565R E219561R E219563R E219565R F219561R F219563R F219565R

Unit No. 30A D219561P D219563P D219565P E219561P E219563P E219565P F219561P F219563P F219565P

10A

30A

J

2.1

3.1

K

4

5

C E I

20kV

30kV

55 55 55

91 91 91

KDR 5 / A

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil Series parallel coupling 15-20 kV 30-63 A Setting 2.5 % per position

L

Number of Positions

50 70 100 130

2 2 2 2

30A

63A

Unit No. C229850 D229850 E229850 F229850

Unit No. C229870 D229870 E229870 F229870

30A

63A

J

3.1

5.1

K

5

7

KDR 6 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil Star-delta coupling 15-20 kV 30-63 A Setting 2.5 % per position

Number of Positions

Unit No.

Unit No.

50

2

C249850

C249870

70

2

D249850

D249870

100

2

E249850

E249870

130

2

F249850

F249870

L

30A

63A J K

30A 3.1 5

63A 5.1 7

KDR 7 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Common output per phase 20 kV 10-63 A 3-5-7 positions. Setting 2.5 % per position

Number of Positions 3 5 7 3 5 7

10A

30A

63A

Unit No.

Unit No.

Unit No.

392 500 608 392 500 608

C239331 C239333 C239335 D239331 D239333 D239335

C239351 C239353 C239355 D239351 D239353 D239355

C239371 C239373 C239375 D239371 D239373 D239375

100

3 5 7

392 500 608

E239331 E239333 E239335

E239351 E239353 E239355

E239371 E239373 E239375

130

3 5 7

392 500 608

F239331 F239333 F239335

F239351 F239353 F239355

F239371 F239373 F239375

L

50

70

A

10A

30A

63A

J

2.1

3.1

5.1

K

4

5

7

KDR 8 / A

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Common output per phase 30 kV 10-63 A 3-5-7 positions. Setting 2.5 % per position

L

100

130

Number of Positions 3 5 7 3 5 7

A 484 610 736 484 610 736

10A

30A

63A

10A

30A

63A

Unit No.

Unit No.

Unit No.

J

2.1

3.1

5.1

1E239331 1E239333 1E239335 1F239331 1F239333 1F239335

1E239351 1E239353 1E239355 1F239351 1F239353 1F239355

1E239371 1E239373 1E239375 1F239371 1F239373 1F239375

K

4

5

7

KDR 9 / A

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Common output per phase 20 kV 10-63 A 3-5-7 positions. Setting 2.5 % per position

L

50

70

100

130

Number of Positions 3 5 7 3 5 7 3 5 7 3 5 7

10A

30A

63A

Unit No.

Unit No.

Unit No.

495 603 711

C269331 C269333 C269335

C269351 C269353 C269355

C269371 C269373 C269375

495 603 711 495 603 711 495 603 711

D269331 D269333 D269335 E269331 E269333 E269335 F269331 F269333 F269335

D269351 D269353 D269355 E269351 E269353 E269355 F269351 F269353 F269355

D269371 D269373 D269375 E269371 E269373 E269375 F269371 F269373 F269375

A

10A

30A

63A

J

2.1

3.1

5.1

K

4

5

7

KDR 10 / A

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Two Stages- Delta diagram 20-30 kV 30-63 A 3-7 positions Setting 2.5 % per position

L

50

L

70

100

130

Number of Positions

A

10A Unit No.

20kV 30A Unit No.

63A Unit No.

3

358

C2X209331 C2X209351 C2X209371

4

412

C2X209332 C2X209352 C2X209372

5

466

C2X209333 C2X209353 C2X209373

6

520

C2X209334 C2X209354 C2X209374

7

574

C2X209335 C2X209355 C2X209375

Number of Positions

A

10A Unit No.

20kV 30A Unit No.

63A Unit No.

A

10A Unit No.

30kV 30A Unit No.

J K

10A 2.1 4

30A 3.1 5

63A 5.1 7

63A Unit No.

3

358

D2X209331 D2X209351 D2X209371

433

D2X209531 D2X209551 D2X209571

4

412

D2X209332 D2X209352 D2X209372

487

D2X209532 D2X209552 D2X209572

5

466

D2X209333 D2X209353 D2X209373

541

D2X209533 D2X209553 D2X209573

6

520

D2X209334 D2X209354 D2X209374

595

D2X209534 D2X209554 D2X209574

7

574

D2X209335 D2X209355 D2X209375

649

D2X209535 D2X209555 D2X209575

3

358

E2X209331 E2X209351 E2X209371

433

E2X209531 E2X209551 E2X209571

4

412

E2X209332 E2X209352 E2X209372

487

E2X209532 E2X209552 E2X209572

5

466

E2X209333 E2X209353 E2X209373

541

E2X209533 E2X209553 E2X209573

6

520

E2X209334 E2X209354 E2X209374

595

E2X209534 E2X209554 E2X209574

7

574

E2X209335 E2X209355 E2X209375

649

E2X209535 E2X209555 E2X209575

3

358

F2X209331 F2X209351 F2X209371

433

F2X209531 F2X209551 F2X209571

4

412

F2X209332 F2X209352 F2X209372

487

F2X209532 F2X209552 F2X209572

5

466

F2X209333 F2X209353 F2X209373

541

F2X209533 F2X209553 F2X209573

6

520

F2X209334 F2X209354 F2X209374

595

F2X209534 F2X209554 F2X209574

7

574

F2X209335 F2X209355 F2X209375

649

F2X209535 F2X209555 F2X209575

C E I

20kV 55 55 55

30kV 80 80 80

KDR 11 / A

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil or askarel Multi-stage tap changers. Setting 2.5 % per position

-

Five –stage tap changer 1 stage, series-parallel coupling – 10-20 kV - 30 to 63 A 2 stages, star-delta coupling – 15-20 kV – 30 to 63 A 2 stages, delta diagram – 20kV – 30 to 63 A 3-5-7 positions – setting 2.5 % per position

KDR 12 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil 1. Stage series parallel coupling 15-20 kV 30-63 A 2. Stage delta diagram 20 kV 30-63 A 3-5-7 positions. Setting 2.5 % per position 2.

L

50

Number of Positions 3 5

M

182

7 3 70

100

130

5

202

30A

63A

Unit No.

Unit No.

C200050

C200070

C200051

C200071

C200052

C200072

D200050

D200070

D200051

D200071

7

D200052

D200072

3

E200050

E200070

E200051

E200071

7

E200052

E200072

3

F200050

F200070

F200051

F200071

F200052

F200072

5

5 7

232

262

30A 3.1 5

J K

63A 5.1 7

Number of Positions

C

D

E

3 5 7

73 55 37

75 57 39

76 58 40

KDR 13 /0

TYPE KDR THREEPHASE TAP CHANGER Off-circuit operation can be used in oil 1. Stage series-parallel coupling 15-20 kV 30-63 A 2. Stage delta diagram 20 kV 30-63 A 3-5-7 positions. Setting 2.5 % per position

L

50

70

100

130

Number of Positions 3 5 7 3 5 7 3 5 7 3 5 7

M

132

152

182

212

30A

63A

Unit No.

Unit No.

C280851 C280853 C280855

C280871 C280873 C280875

D280851 D280853 D280855 E280851 E280853 E280855 F280851 F280853 F280855

D280871 D280873 D280875 E280871 E280873 E280875 F280871 F280873 F280875

J K

Number of Positions 3 5 7

30A 3.1 5

63A 5.1 7

C

D

E

73 55 37

75 57 39

76 58 40

KDR 14 /0

TYPE KDR THREEPHASE TAP CHANGER Control devices Assembly according to the order given below as numbers

Lid Assembly The notched end of the shaft (11) is to be fitted into the slot inside the lid. Press the lid onto the shaft, turn it 90° and release. The lid will be locked automatically. To dismantle the lid, apply the assembly operation in reverse order.

Assembly Order: 1234567891011-

O-ring 18.54x3.53 O-ring Sleeve O-ring 9.13x2.62 Spacer Washers Washer 13.9x10.2x3.5 Position Stopper Fixing Nut Control Device Body (Nylon-6) Spring Control Device Lid Shaft

Position Changing Mode In order to change the position of the tap changer, pull the control device body (8) along the direction of the arrow, turn it to the desired position notch and release. The spring system will automatically lock the position via position stopper and position notch on the body.

Notes: For the assembly of the tap changer, the thickness of the transformer cover sheet is assumed to be 10 mm. If the sheet thickness is lower than 10 mm then use the additional spacer washers (4) so that the resulting thickness is to be 10 mm. For example, if the cover sheet thickness is 6 mm then 4 washers are to be used, for the 10mm thick cover sheet no washer is needed. Normal Rest Mode

KDR 15 /A

TYPE KDR THREEPHASE TAP CHANGER Control devices

KDR 16 /C

TYPE KDR THREEPHASE TAP CHANGER Numbering of the positions

KNOB NUMBERING

WHEN ORDERING PLEASE QUOTE: 1- The tap changer unit no. 2- The voltage class current and type of setting or coupling. 3- Control device no. 4- The language on the control device. 5- Number of positions. 6- The indication of the repeater disc (A1, B1) 7- Dimensions of the fixed contacts (j and k) 8- L, e, x, w dimensions from the tables. For special setups not shown in the catalogue please consult us.

KDR 17 /0