YBM()series pad mounted transformer is suitable for 7.2kVup to 36kV ring power supply and terminal power supply system as HV distribution calculation and protection equipment. In the substation except transformer there are 4 load switches, two-position load switch, protection fuse and plug-in fuse in the HV side.

We can install control electrical, distribution electrical, compensation electrical and meters. This substation can use indoor or outdoor.

++++Service environment：
a) Air temperature: Maximum temperature: +40°C; Minimum temperature:-25°C

b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .

c) Altitude above sea level: Maximum installation altitude: 2500m

d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.

e) No frequent violent shake

++++Main technical specifications：

Name	Unit	HV equipment	Transformer	LV Equipment
Rated voltage	kV	12	12/0.4	0.4
Rated current	A	630	3/75~150/1875	Less than 4000
Frequency	Hz	50
Rated Capacity	kVA	50-1250
Pfr withstand	kV	42/50/70		2.5
BIL	kV	75/125/170
Crust Protection Grade		IP23	Omni seal	IP33
Noisy Grade	dB	Oil type less than 55
Appearance Dimensions	mm	According to primacy wiring circuit schema

++++Structure characteristics:

The box structure of this product is divided into two parts. In front is HV and LV operation room. In the HV room including HV terminals, load switch, off-load switchgear, plug-in fuse, pressure relief valve, thermometer, oil level indicator and oil drain valve. In LV room including LV terminals. In the back sector are oil tank and radiator, and transformer winding and iron, load switch and protection fuse are in the oil tank.