On-load tap changers type UCG

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 UCG model is the smallest of the UC types and is suitable for transformers up to 500 MVA with a BIL rating of 1050 kV and a current rating of 600 (1500) A.

Extend your transformer’s lifetime and easily upgrade to on-load tap-changers type UCG with vacuum technology.

Product scope

Base technology: Conventional, resistance, in-tank
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)	300 kV	300 kV
Max lightning impulse (BIL)	1050 kV	1050 kV
Max current 3-phase 1-phase (one tap-changer/phase)	600 A 1500 A	N.A. 1500 A
Enforced current splitting 1-phase (one tap-changer/phase)	1800 A	1800 A
Max step voltage	3500 V	3500 V

Why Hitachi Energy?

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-AAY
Maintenance guide	1ZSE 5492-124
Repair guide	1ZSE 5492-129
Spare parts list	1ZSC000562-ACV
(V)UC Transport cover for yoke mounted tap-changers - Product information	1ZSC000562-ADN
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	Available versions	Drawing number
380 650 750 1050	C	L	N	300-600	5-18	Short: 300 2) Long: 300 to 600	5492 0104-1
			B11)				5492 0104-5
			E, T	300-600		Short: all 2) Long: all	5492 0104-5
				900-1200		Long only	5492 0104-3
				900		Short 2)	5492 0104-31
				1500		Long	5492 0104-2
			B21)	300-600		Short: 300 2) Long: 300 to 600	5492 0104-6
		R	N	300-600	8-15	Short: 300 2) Long: 300 to 600	5492 0104-7
					16-35		5492 0104-8
			B11)		8-15		5492 0104-15
					16-35		5492 0104-16
			E, T	300-600	8-15	Short: all 2) Long: all	5492 0104-15
					16-35		5492 0104-16
				900-1200	8-15	Long	5492 0104-13
					16-35		5492 0104-14
				900	8-15	Short 2)	5492 0104-32
					16-35		5492 0104-33
				1500	8-15	Long	5492 0104-9
					16-35		5492 0104-10
			B21)	300-600	8-15	Short: 300 2) Long: 300 to 600	5492 0104-17
					16-35		5492 0104-18
		D	N	300-600	8-15	Short: 300 2) Long: 300 to 600	5492 0104-19
					16-35		5492 0104-20
			B11)		8-15		5492 0104-27
					16-35		5492 0104-28
			E, T	300-600	8-15	Short: all 2) Long: all	5492 0104-27
					16-35		5492 0104-28
				900-1200	8-15	Long	5492 0104-23
					16-35		5492 0104-24
				900	8-15	Short 2)	5492 0104-34
					16-35		5492 0104-35
				1500	8-15	Long	5492 0104-21
					16-35		5492 0104-22
			B21)	300-600	8-15	Short: 300 2) Long: 300 to 600	5492 0104-29
					16-35		5492 0104-30
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group". 2) Step voltage ≤ 1500 V

Insulating level (kV)	Selector	Switching type	Connection	Max. rated through-current (A)	Number of positions	Available versions	Drawing number
380 650 750 1050	III	L	N	300-600	5-22	Short: 300 2) Long: 300 to 600	5492 0101-1
							5492 0101-2
			B11)
			E, T	300-900		Short: all 2) Long: all
				900		Short 2)	5492 0101-3
				1200		Long	5492 0101-4
				1500			5492 0101-5
			B21)	300-600		Short: 300 2) Long: 300 to 600	5492 0101-6
		R, D	N	300-600	9, 13	Short: 300 2) Long: 300 to 600	5492 0101-7
					11, 15-35		5492 0101-8
			B11)		9, 13		5492 0101-9
					11, 15-35		5492 0101-10
			E, T	300-900	9, 13	Short: all 2) Long: all	5492 0101-9
					11, 15-35		5492 0101-10
				900	9, 13	Short 2)	5492 0101-11
					11, 15-35		5492 0101-12
				1200	9, 13	Long	5492 0101-13
					11, 15-35		5492 0101-14
				1500	9, 13		5492 0101-15
					11, 15-35		5492 0101-16
			B21)	300-600	9, 13	Short: 300 2) Long: 300 to 600	5492 0101-17
					11, 15-35		5492 0101-18
1) B1 (1 phase) and B2 (2 phases) are combined components, forming the "B-group". 2) Step voltage: see Technical guide, section "Rated phase step voltage for type UCG".

Insulating level (kV)	Selector	Switching type	Connection	Max. rated through-current (A)	Number of positions	Available versions	Drawing number
380 650 750 1050	F	L	N	300-600	5-18	400 A: long 500 A: long 600 A: long	1ZSC004528-ABC
			B11)	300-600		B1, 400 A: long 500 A: long 600 A: long	1ZSC004528-ABE
			E, T	300-1500		1200 A: long 1500 A: long	1ZSC004528-ABE
			B21)	300-600		400 A: long 500 A: long 600 A: long	1ZSC004528-ABJ
		R, D	N	300-600	8-9, 12-13	400 A: long 500 A: long 600 A: long	1ZSC004528-AAU
					10-11, 14-35		1ZSC004528-ABY
			B11)	300-600	8-9, 12-13	B1, 400 A: long 500 A: long 600 A: long	1ZSC004528-AAW
					10-11, 14-35		1ZSC004528-ABZ
			E, T	300-1500	8-9, 12-13	1200 A: long 1500 A: long	1ZSC004528-AAW
					10-11, 14-35		1ZSC004528-ABZ
			B21)	300-600	8-9, 12-13	400 A: long 500 A: long 600 A: long	1ZSC004528-ABA
					10-11, 14-35		1ZSC004528-ACA
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 0103-1
Top section accessories, cover, and active part mounting	1ZSC027626-AAB
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
Temperature relay	1ZSC003716-AAM
Temperature sensor	1ZSC005333-AAF
Temperature sensor and pressure relay	5492 0083-33
Thermo switch housing	5492 0083-22

Number of positions	Max. number of turns	Min. number of turns
5	5492 0373-1	5492 0376-1
6	5492 0373-2	5492 0376-2
7	5492 0373-3	5492 0376-3
8	5492 0373-4	5492 0376-4
9	5492 0373-5	5492 0376-5
10	5492 0373-6	5492 0376-6
11	5492 0373-7	5492 0376-7
12	5492 0373-8	5492 0376-8
13	5492 0373-9	5492 0376-9
14	5492 0373-10	5492 0376-10
15	5492 0373-11	5492 0376-11
16	5492 0373-12	5492 0376-12
17	5492 0373-13	5492 0376-13
18	5492 0373-14	5492 0376-14

Number of positions	Max. number of turns	Min. number of turns
9	5492 0374-1	5492 0377-1
11	5492 0374-2	5492 0377-2
13	5492 0374-3	5492 0377-3
15	5492 0374-10	5492 0377-10
17	5492 0374-4	5492 0377-4
19	5492 0374-5	5492 0377-5
21	5492 0374-6	5492 0377-6
23	5492 0374-7	5492 0377-7
25	5492 0374-8	5492 0377-8
27	5492 0374-9	5492 0377-9
29	5492 0374-11	5492 0377-11
31	5492 0374-12	5492 0377-12
33	5492 0374-13	5492 0377-13
35	5492 0374-14	5492 0377-14

Number of positions	Max. number of turns	Min. number of turns
9	5492 0375-1	5492 0378-1
11	5492 0375-2	5492 0378-2
13	5492 0375-3	5492 0378-3
15	5492 0375-10	5492 0378-10
17	5492 0375-4	5492 0378-4
19	5492 0375-5	5492 0378-5
21	5492 0375-6	5492 0378-6
23	5492 0375-7	5492 0378-7
25	5492 0375-8	5492 0378-8
27	5492 0375-9	5492 0378-9
29	5492 0375-11	5492 0378-11
31	5492 0375-12	5492 0378-12
33	5492 0375-13	5492 0378-13
35	5492 0375-14	5492 0378-14

Number of positions	Max. number of turns	Min. number of turns
5	5492 0367-11	5492 0370-11
6	5492 0367-12	5492 0370-12
7	5492 0367-13	5492 0370-13
8	5492 0367-14	5492 0370-14
9	5492 0367-1	5492 0370-1
10	5492 0367-2	5492 0370-2
11	5492 0367-3	5492 0370-3
12	5492 0367-4	5492 0370-4
13	5492 0367-5	5492 0370-5
14	5492 0367-6	5492 0370-6
15	5492 0367-7	5492 0370-7
16	5492 0367-8	5492 0370-8
17	5492 0367-9	5492 0370-9
18	5492 0367-10	5492 0370-10
19	5492 0367-15	5492 0370-15
20	5492 0367-16	5492 0370-16
21	5492 0367-17	5492 0370-17
22	5492 0367-18	5492 0370-18

Number of positions	Max. number of turns	Min. number of turns
9	5492 0368-1	5492 0371-1
11	5492 0368-2	5492 0371-2
13	5492 0368-3	5492 0371-3
15	5492 0368-4	5492 0371-4
17	5492 0368-5	5492 0371-5
19	5492 0368-6	5492 0371-6
21	5492 0368-7	5492 0371-7
23	5492 0368-8	5492 0371-8
25	5492 0368-9	5492 0371-9
27	5492 0368-10	5492 0371-10
29	5492 0368-11	5492 0371-11
31	5492 0368-12	5492 0371-12
33	5492 0368-13	5492 0371-13
35	5492 0368-14	5492 0371-14

Number of positions	Max. number of turns	Min. number of turns
9	5492 0369-1	5492 0372-1
11	5492 0369-2	5492 0372-2
13	5492 0369-3	5492 0372-3
15	5492 0369-4	5492 0372-4
17	5492 0369-5	5492 0372-5
19	5492 0369-6	5492 0372-6
21	5492 0369-7	5492 0372-7
23	5492 0369-8	5492 0372-8
25	5492 0369-9	5492 0372-9
27	5492 0369-10	5492 0372-10
29	5492 0369-11	5492 0372-11
31	5492 0369-12	5492 0372-12
33	5492 0369-13	5492 0372-13
35	5492 0369-14	5492 0372-14

Number of positions	Max. number of turns	Min. number of turns
5	1ZSC004307-AAA	1ZSC004308-AAA
6	1ZSC004307-AAB	1ZSC004308-AAB
7	1ZSC004307-AAC	1ZSC004308-AAC
8	1ZSC004307-AAD	1ZSC004308-AAD
9	1ZSC004307-AAE	1ZSC004308-AAE
10	1ZSC004307-AAF	1ZSC004308-AAF
11	1ZSC004307-AAG	1ZSC004308-AAG
12	1ZSC004307-AAH	1ZSC004308-AAH
13	1ZSC004307-AAJ	1ZSC004308-AAJ
14	1ZSC004307-AAK	1ZSC004308-AAK
15	1ZSC004307-AAL	1ZSC004308-AAL
16	1ZSC004307-AAM	1ZSC004308-AAM
17	1ZSC004307-AAN	1ZSC004308-AAN
18	1ZSC004307-AAP	1ZSC004308-AAP

Number of positions	Max. number of turns	Min. number of turns
9	1ZSC004309-AAA	1ZSC004310-AAA
11	1ZSC004309-AAB	1ZSC004310-AAB
13	1ZSC004309-AAC	1ZSC004310-AAC
15	1ZSC004309-AAD	1ZSC004310-AAD
17	1ZSC004309-AAE	1ZSC004310-AAE
19	1ZSC004309-AAF	1ZSC004310-AAF
21	1ZSC004309-AAG	1ZSC004310-AAG
23	1ZSC004309-AAH	1ZSC004310-AAH
25	1ZSC004309-AAJ	1ZSC004310-AAJ
27	1ZSC004309-AAK	1ZSC004310-AAK
29	1ZSC004309-AAL	1ZSC004310-AAL
31	1ZSC004309-AAM	1ZSC004310-AAM
33	1ZSC004309-AAN	1ZSC004310-AAN
35	1ZSC004309-AAP	1ZSC004310-AAP

Number of positions	Max. number of turns	Min. number of turns
9	1ZSC004311-AAA	1ZSC004312-AAA
11	1ZSC004311-AAB	1ZSC004312-AAB
13	1ZSC004311-AAC	1ZSC004312-AAC
15	1ZSC004311-AAD	1ZSC004312-AAD
17	1ZSC004311-AAE	1ZSC004312-AAE
19	1ZSC004311-AAF	1ZSC004312-AAF
21	1ZSC004311-AAG	1ZSC004312-AAG
23	1ZSC004311-AAH	1ZSC004312-AAH
25	1ZSC004311-AAJ	1ZSC004312-AAJ
27	1ZSC004311-AAK	1ZSC004312-AAK
29	1ZSC004311-AAL	1ZSC004312-AAL
31	1ZSC004311-AAM	1ZSC004312-AAM
33	1ZSC004311-AAN	1ZSC004312-AAN
35	1ZSC004311-AAP	1ZSC004312-AAP

Conventional on-load tap-changers

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Catalogs and instructions

Dimension drawings type UCG.../C

Dimension drawings type UCG.../III

Dimension drawings type UCG../F

Additional dimension drawings

Connection diagrams type UCGL../C

Connection diagrams type UCGR./C

Connection diagrams type UCGD./C

Connection diagrams type UCGL./III

Connection diagrams type UCGR./III

Connection diagrams type UCGD./III

Connection diagrams type UCGL./F

Connection diagrams type UCGR./F

Connection diagrams type UCGD./F

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Conventional on-load tap-changers

Tap-changers

Transformer Insulation and Components

Transformers

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