Low VoltageThyristor Switching Switch

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KS/TSC thyristor switches operate by detecting zero-crossings of voltage and current to ensure that capacitor banks are switched in near the voltage zero‑crossing, thereby eliminating inrush currents. Switching out is performed at current zero‑crossing, preventing transient overvoltages. These features fully meet the requirements for zero‑crossing switching of capacitors. Moreover, since the thyristor’s firing pulses are unlimited, quasi‑dynamic compensation—with response times on the order of milliseconds—is achievable, making these switches well suited for frequent capacitor switching and ideal for applications with rapidly varying loads. Compared with AC contactors, they represent a significant technological advance. The advantages of thyristor switches include zero‑crossing switching, rapid operation, and swift response, making them particularly appropriate for dynamic compensation applications.

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Low-voltage component

Hotline:

400-0571-505

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Detailed introduction

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Product Overview

KS/TSC thyristor switches operate by detecting zero-crossings of voltage and current to ensure that capacitor banks are switched in near the voltage zero‑crossing, thereby preventing inrush currents. Switching out is performed at current zero‑crossing, avoiding transient overvoltages. This functionality fully meets the requirements for zero‑crossing switching of capacitors. Moreover, since the number of thyristor triggering cycles is unlimited, quasi‑dynamic compensation—with response times on the order of milliseconds—is achievable, making these switches well suited for frequent capacitor switching and ideal for applications with rapidly varying loads. Compared with AC contactors, they represent a significant technological advance. The advantages of thyristor switches include zero‑crossing switching, rapid operation, and fast response, making them particularly suitable for dynamic compensation applications.

Product model

Main Technical Parameters

Rated voltage	230V～850V (special voltages available upon request)
Rated frequency	50 Hz, 60 Hz
Control capacity	120kvar
working voltage	DC12V
Dielectric Strength	2000V or 3800V
Temperature protection	70℃
Cooling mode	Air-cooled
control mode	Joint supplementation or separate supplementation
Altitude	2,000 meters; custom options available for distances over 2,000 meters.
Service life	Greater than 30,000 hours
Executive standards	IEC 60143-4-2010

● Altitude shall not exceed 2,000 meters (corrections shall be applied for altitudes above 2,000 meters in accordance with the relevant standards);
● Ambient temperature: -40~+50°C;
● The installation location shall be free from severe mechanical vibration, harmful gases and vapors, and conductive or explosive dust.
● Continuous operating voltage: 1.0Un; the maximum long-term overvoltage shall not exceed 1.1Un.
● Steady-state overcurrent (including harmonic currents) shall not exceed 1.5In.

Main Wiring Diagram

Product dimensions

A. Co-supplementation
Model number	Capacitor bank capacity/kvar
KS/TSC0.48-5G	5
KS/TSC0.48-10G	10
KS/TSC0.48-15G	15
KS/TSC0.48-20G	20
KS/TSC0.48-25G	25
KS/TSC0.48-30G	30
KS/TSC0.48-40G	40
KS/TSC0.48-50G	50

B. Partial Compensation
Model number	Capacitor bank capacity/kvar
KS/TSC0.28-5F	5
KS/TSC0.28-10F
KS/TSC0.28-15F	15
KS/TSC0.28-20F
KS/TSC0.28-25F	25
KS/TSC0.28-30F

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