Low Voltage Capacitor Banks (TSC)

Low voltage capacitor banks (TSC)

Oct 21, 2019

Introduction:

Based on DSP control technology and Instantaneous power control theory, Wanlida thyristor switched capacitor banks (TSC/TSF) with high-speed switching capability are designed to support the supply voltage of distribution systems and to correct the power factor and eliminate the harmonic current of connected loads.

Thyristor zero-crossing switching switches are resistant to mechanical wear, operate without noise, and are capable of practically transient-free switching, so it is more safety than contactor switched capacitor banks.

Functions:

1.Improve power factor

2.Stabilize busbar voltage and suppress subsynchronous resonance

3.Eliminate harmonic current

4.Decrease grid loss

5.Optimize reactive power

I6.ncrease transformer loading capacity

Principles:

Thyristor switched capacitor banks is the compensating device based on switching operation of capacitor banks by thyristor. TSC mainly consists of control system, thyristor, capacitors and reactors. Capacitor banks are divided into multiple units to realize step control. TSC is able to implement step regulating in reactive power, accuracy of regulating depends on numbers of multiple unit.

Thyristor switched capacitor banks (TSC/TSF) apply delta wiring. To optimize effect of reactive power compensating and harmonic filtering, TSC capacity and branch configuration must be designed according to reactive power variation and harmonic components from nonlinear load.

Technical features:

SN	Parameters	Value
1	Rated voltage	AC220V~1140V
2	Operation voltage	0.8~1.1Un
3	Rated frequency	50Hz/60Hz (Option)
4	Capacitor wiring mode	Delta/Star (Option)
5	Switching mode	Cycle/sequence/coded combination (Option)
6	Response time	<20ms
7	Allowable maximum over current	1.3 times of rated current
8	Control steps	1~12/1~16 (Option)
9	Multiple units operation mode	Parallel
10	Power loss	<0.5%
11	Communication modes	Modbus/RS485/232/CAN/GPRS etc (Option)
12	IP	IP40 (customized)
13	Cooling mode	Air cooling
14	Leading in mode	Bottom/Top/Busbar (Option)
15	Altitude	<1500 M
16	Ambient temperature	-200C~+500C
17	Ambient humidity	<95%
18	Operation environment	No condensation, no corrupt gas, no conductive dust, no explosive and inflammable materials
19	Installation requirement	No vibration, inclination≤50
20	Switching characteristic	Current zero-crossing switching
21	Harmonic display	Measure and display 2nd ~25th
22	Phase sequence protection	Fault phase, phase loss
23	Thyristor protection	Over-temperature protection and self-recovery
24	LCD display	Real time current and voltage
25	Emergency protection	Emergency stop switch
26	Compensation mode	Three-phase compensation, phase splitting compensation
27	Protection modes	Over current, over voltage, short-circuit, quick break