High-Quality ZGS□-12 Combined Transformer

YBWF/G-40.5/0.69 Wind Power Transformer/Photovoltaic Power Transformer

SCB□ series 6-10kV Dry-Type Power Transformer

S□ series 6-10kV Oil-Immersed Power Transformer

Indoor high voltage vacuum circuit breaker series

XGN15-12 Box-type Fixed Ring Main Unit Switchgear

TRXGN-12 Air (Environmentally Friendly Gas) Insulated Ring Main Unit

MNS Low-Voltage Withdrawable Switchgear

Cable Branch Box with SF6 Load Switch

35kV European-style cable branch box

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

Introducing the ZGS□-12 Combined Transformer, a state-of-the-art, fully sealed American-style box transformer specifically designed for cable distribution networks in urban and rural settings. As a leading product from China, this transformer integrates advanced high-voltage control, protection, and distribution equipment, making it ideal for flexible ring-main or terminal power supply solutions. Manufactured in our specialized factory, this transformer features low-loss technology and plug-in dry-type fuses to meet various low-voltage feeder demands efficiently. With its compact and fully insulated design, the ZGS□-12 ensures exceptional safety and reliability, positioning it as a top choice among suppliers in the industry

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
	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□-12 Combined Transformer Standard Type Dimensions Diagram

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

ZGS□-12 Combined Transformer Enhanced Type Dimensions Diagram

ZGS□ Enhanced Type Dimensions (Extended Parameters)

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

❓ Frequently Asked Questions (FAQ)

Q What is the ZGS□-12 Combined Transformer used for?

The ZGS□-12 Combined Transformer is designed for use in 10kV prefabricated substations. It integrates the transformer with high-voltage switchgear and low-voltage distribution equipment into a compact unit, making it suitable for urban power distribution, industrial facilities, and commercial buildings.

Q What capacity range is available for the ZGS□-12 Combined Transformer?

The ZGS□-12 Combined Transformer is available in a wide range of rated capacities from 30 kVA up to 1600 kVA, covering the S9, S10, S11, S13, and S20 series oil-immersed transformer types to meet various application requirements.

Q Can the high-voltage tap range be customized?

Yes. According to customer requirements, the high-voltage tap range of the transformer can be designed as ±2×2.5%, providing greater flexibility for voltage adjustment in different grid conditions.

Q What are the available low-voltage output options?

The standard low-voltage output is 0.4 kV. However, according to customer requirements, the low-voltage output of the transformer can also be configured as 0.69 kV to suit specific industrial applications.

Q What is the difference between the Standard Type and Enhanced Type dimensions?

The Standard Type and Enhanced Type differ primarily in the dimension A (length). The Enhanced Type has a larger A dimension of 2400 mm compared to 1900 mm for the Standard Type, providing additional space for enhanced protection components or additional switchgear configurations. Other dimensions such as B, C, E, F, and H remain similar across both types for the same capacity range.

Q What are the key electrical parameters of the load switch used in this transformer?

The load switch is available in two rated current configurations: 315 A and 630 A, both rated at 12 kV. Key parameters include an impulse withstand voltage of 75 kV, power frequency withstand voltage of 42 kV (1 min), and short-circuit making currents of 31.5 kA and 40 kA respectively. The 315 A switch supports 2000 mechanical operations, while the 630 A switch supports 3000 mechanical operations.