High-Quality ZGS□-12 Combined Transformer

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High-Quality ZGS□-12 Combined Transformer from China Suppliers and Factory for Reliable Power Distribution

The ZGS□-12 combined transformer is a top-tier American-style box transformer, expertly designed for cable distribution networks. This compact and fully sealed unit integrates high-voltage control, protection, and distribution equipment, providing versatile options for both ring-main and terminal power supply. Featuring advanced low-loss transformers and plug-in dry-type fuses, it efficiently meets diverse low-voltage feeder requirements. Manufactured in China, this transformer is ideal for urban and rural power grid applications, ensuring safety and reliability. With its fully insulated design, it stands out as a product from leading suppliers and factories in the industry, promising exceptional performance for effective power distribution.

Product Details

Product Model

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
Standard Type	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

ZGS□ Enhanced Type Dimensions

Standard Type	Capacity kVA	A	B	C	D	E	F	H
Standard Type	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

ZGS□ Enhanced Type Dimensions

Standard Type	Capacity kVA	A	B	C	D	E	F	G	M	H
Standard Type	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

Frequently Asked Questions (FAQ)

What are the primary high-voltage and low-voltage ratings for the ZGS□-12 transformer series?

The standard high-voltage ratings support 6kV, 6.3kV, and 10kV configurations. The standard low-voltage rating is 0.4kV, with an optional 0.69kV configuration available upon custom request.

Can the high-voltage tapping range be customized?

Yes. While the standard tap range is ±5%, it can be custom-engineered to ±2×2.5% according to specific operational and customer requirements.

What are the allowable temperature rise limits during transformer operation?

The series operates within standard thermal thresholds: the allowable temperature rise is 60°C for the top oil layer and 65°C for the transformer coils.

What mechanical and electrical endurance ratings do the load switches provide?

Both 315A and 630A rated load switches deliver up to 100 on-load switching operations. The 315A switch provides 2,000 mechanical operations, while the 630A switch delivers up to 3,000 mechanical operations.

What is the difference between standard and enhanced dimension enclosures?

The standard type features a compact structure with an overall length (A) of 1900mm. The enhanced dimension models offer an expanded base length of 2400mm with modified depth and height parameters to provide additional compartment space and facilitate diverse installation requirements.

Which vector connection group symbols are available?

The combined transformer supports standard dual vector groups: Yyn0 and Dyn11.