High-Quality ZGS□-12 Combined Transformer

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High-Quality ZGS□-12 Combined Transformer

The ZGS□-12 combined transformer is a compact, fully sealed American-style box transformer designed for cable distribution networks. Integrating high-voltage control, protection, and distribution equipment, it offers flexible ring-main or terminal power supply. Featuring low-loss transformers and plug-in dry-type fuses, it suits various low-voltage feeder needs. Its compact, fully insulated design ensures safety and reliability for urban and rural power grids.

Product Details

Product Model

1.ZGS□-12 Combined Transformer.jpg

Performance Parameters of Transformers

△Performance Parameters of 10kV Prefabricated Substation S11, S13, S20 Series Oil-immersed Transformers

Serial Number	Rated Capacity(kVA)	Rated Voltage-High Voltage(kV)	Rated Voltage-Low Voltage(kV)	Tapping Range(%)	Vector Group Symbol	No-load Current(%)-S9	No-load Current(%)-S10/S11	Loss(W)-No-load-S10
1	30	6 6.3 10	0.4 (0.69)	±5 (±2×2.5)	Yyn0 Dyn11	2.2	2.0
2	50					2.0	1.8
3	63					1.9	1.5
4	80					1.7	1.2
5	100					1.6	1.1
6	125					1.5	1.0	340
7	160					1.4	1.0	400
8	200					1.4	0.8	480
9	250					1.2	0.8	560
10	315					1.1	0.7	670
11	400					1.0	0.7	800
12	500					1.0	0.6	960
13	630					0.9	0.6	1200
14	800					0.8	0.6	1400
15	1000					0.7	0.5	1700
16	1250					0.6	0.5	1950
17	1600					0.6	0.5	2400

Serial Number	Loss(W)-No-load-S10	Loss(W)-No-load-S11	Loss(W)-load-S9	Loss(W)-load-S10/S11	Resistance Voltage(%)	Noise(dB)	Temperature Rise
1	130		600		4	5.5	Top oil Temperature 60° coil 65°
2	170		870
3	200		1040
4	250		1250
5	290		1500
6	270		1800
7	310		2200
8	375		2600
9	455	400	3050	3000
10	540	475	3650	3600
11	650	570	4300	4200
12	775	680	5100	5000
13	920	800	6200	6000	4.5
14	1120	980	7500	7400
15	1320	1150	10300	9860
16	1560	1360	12800	12000
17	1880	1640	14500	14000

Note:

According to customer requirements, the high-voltage tap range of the transformer can be designed as ±2×2.5%.

According to customer requirements, the low-voltage of the transformer can be designed as 0.69kv.

△Performance Parameters of Load Switch

Rated Current(A)	Rated Voltage(kV)	Impulse Withstand Voltage(kV)	Power Frequency Withstand Voltage(1min.kV)	Rated Short-time Withstand Current(kA/s)	Short-circuit Making Current(kA)	Peak Withstand Current of Short-time Current(kA)	Number of Load Operations	Number of Mechanical Operations
315	12	75	42	12.5/2	31.5	31.5	100	2000
630	12	75	42	16/4	40	40	100	3000

Dimensions

△ZGS□ standard type dimensions

Standard Type	Capacity kVA	A	B	C	D	E	F	H
	100-250	1900	1650	1250	650/800	600	1410/1560	1450
	315	1900	1650	1350	650/800	650	1460/1610	1450
	400-500	1900	1750	1450	650/800	650	1490/1640	1550
	630	1900	1750	1550	650/800	700	1580/1730	1550
	800	1900	1850	1550	650/800	700	1640/1790	1650
	1000	1900	1850	1650	650/800	700	1640/1790	1650

2.ZGS□-12 Combined Transformer.jpg

△ZGS□ Enhanced Type Dimensions

Standard Type	Capacity kVA	A	B	C	D	E	F	H
	100-250	2400	1650	1250	800	600	1560	1450
	315	2400	1650	1350	800	650	1610	1450
	400-500	2400	1750	1450	800	650	1640	1550
	630	2400	1750	1550	800	700	1730	1550
	800	2400	1850	1550	800	700	1790	1650
	1000	2400	1850	1650	800	700	1790	1650

3.ZGS□-12 Combined Transformer.jpg

△ZGS□ Enhanced Type Dimensions

Standard Type	Capacity kVA	A	B	C	D	E	F	G	M	H
	100-250	2400	1750	1250	800	600	1750	1560	950	550
	315	2400	1750	1350	800	650	1750	1610	950	550
	400-500	2400	1850	1450	800	650	1750	1640	950	550
	630	2400	1850	1550	800	650	1750	1720	950	550
	800	2400	1950	1650	800	650	1750	1790	950	550
	1000	2400	1950	1650	800	700	1750	1840	950	550

Product Functions

◆Integrates high-voltage control, protection, substation, and distribution equipment.

◆Provides flexible power supply in ring-main, terminal, or dual-power modes.

◆Accommodates various low-voltage feeder requirements with customizable housing.

◆Offers transformer overload protection via high-voltage fuses housed in oil.

◆Allows for hot-plugging of 200A cable elbows with load operation.

Applicable Environment

◇Ambient Temperature: -30℃ to +40℃.

◇Altitude: ≤1000 meters.

◇Humidity: Average daily relative humidity ≤95%.

◇Installation Site: Minimal pollution, no corrosive/flammable gases, severe vibration, or inclinations >3°.

◇Other: Withstands specified wind speeds and seismic conditions.

Product Highlights

◆Compact & Space-Saving: Volume is approximately 1/3 to 1/2 of comparable European-style transformers.

◆Fully Sealed & Safe: Fully insulated structure requires no insulation distance, ensuring personnel safety.

◆High Reliability: Excellent transformer performance with low loss, noise, and strong overload/short-circuit resistance.

◆Flexible Configuration: Available in standard, enhanced, or comprehensive housing types for cost-effective selection.

◆Grid-Adaptive Design: Incorporates plug-in dry-type fuses tailored for Chinese grid requirements.