ZGS Pad-mounted Secondary Substation - American Type

详情

~ZGS Pad-mounted Secondary Substation - American Type
Ⅰ.Overview
For American type pad-mounted secondary substation, the transformer iron, winding, medium voltage load switch and fuse switch are all enclosed in one compartment. The advantage for this type of substation is very compact, simplified structure, easy assembling, flexible operation, which can be applied indoor or outdoor.
We have three types: ZGS*****0KVA; ZGS*****0KVA;ZGS*****0KVA
Ⅱ.Environmental conditions
1. elevation: over 1,**0 m above;
2. Ambient temperature: higher than + *0℃ and lower than**5℃; upper average daily temperature difference exceeds *5℃; annual average temperature difference exceeds *0℃;
3. More than *5m/s in the wind speed;
4. The installation site has no explosion danger, no chemical corrosion and violent vibration;
5. Cooling mode: Air self-cooling (AN).
Ⅲ.Specification
Item Unit Specification
Rated voltage  Kv *0/0.4(HV/LV)
Rated Capacity kVA **0~***0
Maximum operating voltage  Kv *2(HV side)
Rated frequency  Hz *0
Rated capacity  Kva ******0
1min Power-frequency withstand voltage Kv *5
Lightning impulse withstand voltage Kv *5
Cooling-down method   ONAN
High voltage backup fuse open current Ka *0
Plug-in fuse open current Ka 2.5
Ambient temperature  ℃ **5~**5
The coil allows for a temperature rise ℃ *5
No-load pressure adjustment  ±5%(or)±2×2.5%
Noise grade  Db *0
IP Rating  IP*3
Ⅵ.Features
1.Low noise, low loss, high reliability.
2.Small volume and compact structure to facilitate assembling.
3.Completely screened and insulated structure, double fuses protection, the fuses are dual-sensitive fuses(temperature-sensitive, current-sensitive).
4.Suitable for ring main and terminal power distribution networks.
5. Cable connector structure is used for incoming line, which gives the characteristics of disconnecting switch, it is easy and flexible in operation.
6.The three-phase three-column structure is employed for transformers, and the step-type seams (Step-lap) process is used for the core, so the transformer has low noise and low loss, good anti-short-circuit and overload abilities.
7.High fire point insulating oil is employed, the surface of the transformer is treated to have the abilities of fungus resistance, moisture resistance and salt spray resistance.