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On-load tap-changers type UCL

The UC family is a group of diverter switch on-load tap-changers. They come in a wide range of models with a rating suitable for every application. They are mounted inside of the transformer tank, suspended from the transformer cover. The UC types operate with conventional arc quenching in oil diverter switches. 

The UCL model is the mid-size of the UC types and is suitable for transformers up to 850 MVA with a BIL rating of 1175 kV and current rating of 925 (2400) A. 

Product scope

  • Base technology: Conventional, resistance, in-tank, diverter switch
  • Common applications: Network, special, industrial, HVDC
  Tap-changer placed in the neutral point of the winding Other placements of the tap-changer
Highest voltage for equipment (Um) 362 kV 362 kV
Max lightning impulse (BIL) 1175 kV 1175 kV
Max current 3-phase 1-phase (one tap-changer/phase) 925 A
2400 A
N.A.
2400 A
Enforced current splitting 1-phase (one tap-changer/phase) 2700 A 2700 A
Max step voltage 4500 V 4500 V

Why Hitachi ABB Power Grids?

  • Unique open design for quick and easy maintenance
  • Maintenance in any tap position and without dismantling the shaft system, thus eliminating the risk for failure from improper assembly or alignment
  • No online oil filter is needed
  • Unsurpassed maintenance intervals

Get to know more

Document title ID
Technical guide 1ZSC000562-AAW
Declaration of conformity 1ZSC000498-ABN
Ordering data form (.xlsm)
Please note that this is an interactive form, which can be filled in, saved and sent to us by e-mail.
1ZSC000498-ACC
Ordering data form explanations 1ZSC000498-AAP
User's manual 1ZSE 5492-155
Installation and commissioning guide 1ZSC000562-AAZ
Maintenance guide 1ZSE 5492-125
Repair guide 1ZSE 5492-129
Spare parts list 1ZSC000562-ACW
   
Accessories and protection devices 1ZSC000562-AAD
Oil filter unit, type HPS 27/27, 54 1ZSC000562-AAF
Oil filter unit, type OLU 1ZSC000562-AAR

Insulating level (kV) Selector Switching type Connection Max. rated through-current (A) Number of positions Drawing number
380
650
750
1050
1175 2)
III L N 600 5-22 5492 0085-1
925 5492 0085-2
E, T, B1 1) 600 5492 0085-3
925 5492 0085-4
E, T 1800 5492 0085-5
2400 5492 0085-6
B2 1) 600 5492 0085-7
925 5492 0085-8
R, D N 600 9, 13 5492 0085-9
11, 15-35 5492 0085-10
925 9, 13 5492 0085-11
11, 15-35 5492 0085-12
E, T, B1 1) 600 9, 13 5492 0085-13
11, 15-35 5492 0085-14
925 9, 13 5492 0085-15
11, 15-35 5492 0085-16
E, T 1800 9, 13 5492 0085-17
11, 15-35 5492 0085-18
2400 9, 13 5492 0085-19
11, 15-35 5492 0085-20
B2 1) 600 9, 13 5492 0085-21
11, 15-35 5492 0085-22
925 9, 13 5492 0085-23
11, 15-35 5492 0085-24
L N 925 21 5492 0085-26
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group".
2) Same as 1050, but with different shielding rings. Models available on request.

Insulating level (kV) Selector Switching type Connection Max. rated through-current (A) Number of positions Drawing number 
380
650
750
1050
F L N 600, 925 5-18 1ZSC026120-ABX 
E, T, B11) 600, 925, 1800 1ZSC026120-AAP
E, T 2400 1ZSC026120-AAS
B21) 600, 925 1ZSC026120-AAT
R, D N 600, 925 8-9, 12-13 1ZSC026120-AAU
10-11, 14-35 1ZSC026120-AAV
E, T, B11) 600, 925, 1800 8-9, 12-13 1ZSC026120-AAW
10-11, 14-35 1ZSC026120-AAZ
E, T 2400 8-9, 12-13 1ZSC026120-ABA
10-11, 14-35 1ZSC026120-ABB
B21) 600, 925 8-9, 12-13 1ZSC026120-ABC
10-11, 14-35 1ZSC026120-ABD
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group".

The drawing shows Drawing number
Mounting on active part 5492 0086-1
Accessories placement: Standard top section without oil filter unit 5492 0086-2
Accessories placement: Top section for oil filter unit 5492 0086-3
Accessories placement: Top section with temperature switch 5492 0086-5
Accessories placement: Top section with two valves R1" 5492 0086-4
Accessories placement: Top section with two valves R1" 5492 0086-8
Drain valve 5492 0083-10
Pressure relief device - flow diameter 130 mm - Qualitrol 5492 0083-15
Pressure relief device - flow diameter 50 mm, standard - Comem 1ZSC003721-AAW
Pressure relief device - flow diameter 50 mm, class C5-M - Comem 1ZSC003721-AAV
Bevel gear (on top section, T-shape) 5492 0083-19
Bevel gear (on top section, L-shape) 1ZSC004021-AAD
Bevel gear (in external drive shaft system) 5492 0083-1
Support for bevel gear (on external drive shaft system) 5492 999-11
Pressure relay 5492 0083-2
Oil flow relay 1ZSC003527-ABB
External drive shaft system 5492 0083-4
Bevel gear (in external drive shaft system) 5492 0083-1
Temperature relay 1ZSC003716-AAM
Temperature sensor 1ZSC005333-AAF
Temperature sensor and pressure relay 5492 0083-33
Thermo switch housing 5492 0083-22

Movie title ID
Tap-changers by ABB: Based on traditions - geared for change 1ZSC000717-AAM
Life cycle support: Training centers 1ZSC000717-ABD
Vacuum - a logical progression: Upgrading made as easy as 1 - 2 - 3 1ZSC000717-ABE
It's all about commitment: Life cycle support 1ZSC000717-ACX
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