Explore our full range of high- and low-voltage electrical equipment, including switchgear,
transformers,and prefabricated substations designed for reliability and safety.
Fully sealed and insulated structure, no insulation distance required, reliable guarantee of personal safety;
It has the characteristics of small size and compact structure, only about 1/3 to 1/2 of the capacity of European substations;
Available in both ring network and terminal power supply modes, with flexible and convenient conversion;
Adopting a dual fuse full range protection method greatly reduces operating costs;
The box is specially painted with anti-corrosion design, suitable for various harsh environments;
Adopting the Dyn11 connection method, it has the advantages of no neutral point drift and good lightning protection performance;
A well-designed transformer with the advantages of low noise and low losses;
Low voltage measurement can be equipped with an intelligent undervoltage controller to cut off the power supply when abnormal voltage occurs on the low voltage bus;
Ensure power supply safety, series products that can meet user needs to the greatest extent possible;
Communication interfaces can be reserved to facilitate the expansion of distribution automation.
ProductDescription：
The ZGS combination transformer places the transformer body, high-voltage load switch, and protective fuse in the same oil tank, greatly reducing the size of the equipment. The box body is a fully sealed structure, using concealed high-strength bolts and oil resistant nitrile rubber gaskets to seal the box cover, which can withstand a pressure of 50kPa for a long time. The box body is designed with waterproof and anti condensation requirements fully considered. The top cover design has a 5% slope to prevent water accumulation. The box door is a three-point interlocking system, and the high-voltage compartment can only be opened after the low-voltage compartment is opened.
Application field：
ZGS combination transformer (also known as American box transformer) is a new type of product designed and manufactured specifically for China’s urban distribution network, based on years of on-site service and operation experience of American box transformers, and the digestion and absorption of advanced foreign technology and design concepts. It has excellent performance such as reliable power supply, reasonable structure, fast installation, flexibility, easy operation, small size, and beautiful appearance. Mainly used in 10kV urban and rural power grids, it is also suitable for public places such as industrial and mining enterprises, airports, stations, ports, highways, and subways.
Technical Parameter：
| project | unit | parameter | parameter |
| rated voltage | kv | 12 | 24 |
| rated current | A | 630 | 630 |
| rated frequency | Hz | 50 | 50 |
| rated ctive load breaking current | A | 630 | 630 |
| rated closed-loop breaking current | A | 10 | 10 |
| rated short-circuit closing current (peak) | kA | 50 | 50 |
| rated short-circuit withstand current duration (main circuit) | S | 3 | 2 |
| rated short-circuit withstand current duration (grounding circuit) | S | 2 | 2 |
| rated short-time withstand current | kA | 25 | 20 |
| rated peak withstand current | kA | 63 | 50 |
| rated short-time power frequency withstand voltage | KV | 42 | 65 |
| rated lightning impulse withstand voltage | KV | 75 | 125 |
| circuit resistance | μQ | ≤100 | ≤100 |
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