Capacitor Banks in Substation

Applying for capacitor banks in substation is very traditional methods to achieve the grid reactive power compensation. It’s widely used in power network. Because the special designed capacitor banks not merely generate/deliver reactive power but also adopt to raise the power factor in AC power network.

The output capacity of a capacitor is proportional to the square of the voltage，the rated voltage of capacitor usually higher than system voltage. Here is a delivered capacitor bank for reference.

A three-phase shunt capacitor banks, with 125kvar output power. It is widely used in medium-sized industrial facilities. The capacitors are designed to withstand high instantaneous overvoltages (such as surges caused by operating switches or lightning strikes. It is smart choice for industrial power facilities to achieve reactive power compensation and power factor improvement. To employ capacitor banks help to reduce lines loss, improve power quality, furthermore avoid fines arising from a low power factor.

Capacitor workshop

Technical Data

No	Description	Unit	Data
1	Rated voltage	Un	4.16k VAC
2	Rated Capacity	Qn	125Kvar
3	Rated capacitance	Cn	19.2µF -3%~+5%
3	Rated current		17.3 A
4	Rated Frequency		60Hz
5	Over current		1.3In
6	Over voltage		1.1Un (12hours every 24 hours)
7	Dielectric loss		≤0.3W/kvar
8	Cooling method		Natural air
9	Operating temperature	Θmin/ max	-40°C / B

Mechanical Parameter

No	Description	Data
1	Internal Structure	Y connection(Star connection), 5 elements connect in prallel, 1element connect in series
2	Protection	External fuses
3	Discharge Resistor	Available, drop to 75V in 10 mintutes
4	Solid Medium	Polypropylene Film
5	Liquid medium	Non-PCB
6	Insulation Level	AC 30Kv(60S)/LI 60Kv(1.2/50µs)
7	Creepage	≥ 320mm
8	Working enviroment	indoor& outdoor available
9	Shell explosion resistance	>15kJ