ZGS11-Z(H) Series Combined Transformer, 10 kV

A combined‑type transformer (also known as an American‑style pad‑mounted substation) integrates the transformer core, high‑voltage load switch, protective fuses, and other components into a single, sealed oil‑filled enclosure. It is equipped with a full suite of operational monitoring instruments, including pressure gauges, pressure relief valves, oil level indicators, and oil temperature gauges. This type of substation offers outstanding performance characteristics such as reliable power supply, rational design, rapid and flexible installation, convenient operation, compact size, and low cost. It can be deployed both outdoors and indoors and is widely used in industrial parks, residential communities, commercial centers, high‑rise buildings, and various other applications.

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Box-type Substation Series

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Product Description

　　Overview

　　A combined‑type transformer (also known as an American‑style pad‑mounted transformer) integrates the transformer core, high‑voltage load switch, protective fuses, and other components into a single sealed oil‑filled enclosure. It is equipped with a full suite of operational monitoring instruments, including pressure gauges, pressure relief valves, oil level indicators, and oil temperature gauges. Featuring reliable power supply, rational design, rapid and flexible installation, convenient operation, compact size, and low cost, the American‑style pad‑mounted transformer is suitable for both outdoor and indoor applications and is widely used in industrial parks, residential communities, commercial centers, high‑rise buildings, and various other settings.

　　Characteristics of American-style pad-mounted substations:

　　1. Fully sealed, fully insulated design—eliminating the need for clearance distances and ensuring reliable personal safety.

　　2. Compact in size and with a streamlined structure, it occupies only about one-third the footprint of conventional domestic transformer substations of the same capacity.

　　3. It can be used both in ring networks and as a terminal unit, with seamless switching that enhances the flexibility of power supply.

　　4. Low losses—on par with those of comparable domestic transformers—and, upon customer request, a range of combined‑type transformers is available, featuring loss levels corresponding to Series 9, Series 10, Series 11, and amorphous‑alloy core designs.

　　5. The cable joint can handle a load current of 200 A; in emergency situations, it can be operated as a load switch and also exhibits the characteristics of an isolating switch, offering convenient and flexible operation.

　　6. Equipped with dual-fuse protection for reliable operation.

　　7. The enclosure features an anti-corrosion design and a special paint finish, making it suitable for a wide range of harsh environments, such as highly polluted areas prone to frequent storms.

　　Technical Performance Parameters

Rated Capacity (kVA)	Rated Voltage (kV)		Connection Group	No-load Electric current (%)	Loss (W)		Impedance Voltage (%)	Reference external dimensions (mm)			Reference weight (kg)
Rated Capacity (kVA)	High pressure	Low pressure	Connection Group	No-load Electric current (%)	No-load	Load	Impedance Voltage (%)	long	wide	High	Body of the vessel	Heavy oil	Total weight
30	6.0 ±2×2.5% or 6.3 ±2×2.5% or 10 ±2×2.5%	0.4	Yyn0 Dyn11	2.1	100	630/600	4.0	1800	1250	2000	170	300	1130
50				2.0	130	910/870		1800	1250	2000	200	340	1180
63				1.9	150	1090/1040		1800	1250	2000	230	365	1220
80				1.8	180	1310/1250		1800	1500	2000	265	400	1250
100				1.6	200	1580/1500		1800	1500	2000	325	430	1290
125				1.5	240	1890/1800		1800	1500	2000	376	440	1340
160				1.4	290	2310/2200		1800	1500	2000	450	448	1400
200				1.3	340	2730/2600		1800	1550	2000	520	460	1540
250				1.2	400	3200/3050		1800	1550	2000	622	450	1630
315				1.1	480	3830/3650		1800	1650	2000	746	506	1836
400				1.0	570	4520/4300		1800	1650	2000	910	610	2165
500				1.0	680	5410/5150		1800	1750	2000	1032	645	2366
630				0.9	810	6200	4.5	1800	1750	2000	1290	720	2800
800				0.8	980	7500		1800	1800	2000	1550	850	3270
1000				0.7	1150	10300		1800	1800	2000	1675	875	3592
Note: For three-phase transformers with a rated capacity of 500 kVA or less, the load loss values above the diagonal line in the table apply to the Dyn II connection group, while those below the diagonal line apply to the YynO connection group.