400V Low‑Voltage TSC Thyristor Contactless Switch

The 400V Low‑Voltage TSC Thyristor Contactless Switch (commonly known as capacitive contactless switch) is a power device capable of fast switching of power capacitors. It is applicable to reactive power compensation control for occasions with rapidly varying loads, such as terminals, welding workshops, shipyards and steel rolling mills.

a. The 400V Low‑Voltage TSC Thyristor Contactless Switch is controlled by a DC 12V voltage signal (automatic positive and negative polarity adaptation).

b. LED indicators directly display the status of power supply, switching, fan, over-temperature, etc.

c. The control terminal of each switch is equipped with 2 common signal connection points to facilitate cascade wiring of multiple switches.

d. The mounting heights of large and small housings are compatible, and they can be installed on the same cross beam simultaneously.

e. Equipped with over-temperature protection function.

a. Voltage range: rated voltage -15% ~ +20% 
b. Frequency range: 45–65 Hz 
c. Control signal voltage: -12 V ±20% / 2 mA or +12 V ±20% / 2 mA 
d. Primary response speed: <20 ms for all models 
e. Secondary response speed: <80 ms for all models 
f. SCR forward voltage drop: typical value 1.2 V 
g. Fan starts at 45 °C, with an operating hysteresis of 5 K.
h. Overtemperature protection activates at 85 °C, with an operating hysteresis of 40 K.

a. Ambient air temperature: -25℃ ~ +40℃.

b. Altitude: not exceeding 1200 m.

c. The installation site shall have clean air, free of explosive and flammable hazardous materials; free of gases that may damage insulation or corrode metals; free of conductive dust; and protected from rain, snow and severe mould growth.

d. No significant harmonics at the installation location. Note: "No significant harmonics" means that when the voltage at the installation point is 1.1UN (UN stands for the rated voltage of the capacitor), harmonic content shall not cause the capacitor current to exceed 1.2 times its rated current.

e. Regardless of whether harmonics exist in the operating environment, an iron-core reactor shall in principle be connected in series at the output of the regulator. This helps improve the service life and reliability of the thyristor.

a. The capacity of the connected capacitor shall not exceed the maximum allowable range of the thyristor switch. 
b. The switching indicator light may be dimly lit when no capacitor is connected. 
c. To judge whether a switch works normally, it must be tested with a capacitor load. 
d. The thyristor switch generates a large amount of heat during operation, so the capacitor cabinet shall be equipped with adequate heat dissipation. The power consumption of the whole capacitor cabinet can be estimated by the following formula:
           W = (Ia+Ib+Ic) × 1V
           W : Total power consumption of the capacitor cabinet (Unit: W) 
           Ia : Maximum compensation current of phase A of the capacitor cabinet (Unit: A) 
           Ib:Maximum compensation current of phase B of the capacitor cabinet (Unit: A) 
           Ic :Maximum compensation current of phase C of the capacitor cabinet (Unit: A)

Available Models	Split Compensation	Common Compensation	Dimensions	Controllable Capacity	Connection Mode	Response Speed	Rated Voltage
JNK CS3F-20-3Y			Type S	20K Var		20mS	Phase230V
JNK CS3F-30-3Y			Type S	30K Var
JNK CS3F-40-3Y			Type S	40K Var
JNK CS3F-50-3Y			TypeB	50K Var
JNK CS3F-60-3Y			TypeB	60K Var
JNK CS3F-80-3Y			TypeB	80K Var			Phase400V
JNK CS3F-100-3Y			TypeB	100K Var			Phase430V
JNK CS3F-100-3Y			TypeB	100K Var			Phase460V
JNK CS1A-20-3			Type S	20K Var		20-80mS	Line400V
JNK CS1A-30-3			Type S	30K Var
JNK CS1A-40-3			Type S	40K Var
JNK CS1A-50-3			Type S	50K Var
JNK CS1A-50-3			TypeB	50K Var
JNK CS1A-60-3			TypeB	60K Var
JNK CS1A-80-3			TypeB	80K Var
JNK CS1A-80-3			TypeB	80K Var			Line690V
JNK CS1A-100-3			TypeB	100K Var			Line750V
JNK CS1A-100-3			TypeB	100K Var			Line800V

① Switching time is less than 20 ms when no reactor is connected in series. If a reactor is connected in series, the switching speed depends on the discharge speed of the capacitor. The capacitor can be switched on once its residual voltage is lower than the peak value of the grid voltage, and the switching time is generally between 20 ms and 80 ms. When a reactor is connected in series, a discharge coil can be fitted to each switch if the user has requirements on response speed.

(Please use Φ5 combination screws supplied by the manufacturer)

Control Terminal No.	Common Compensation Type No.	Split Compensation Type No.	Terminal Function
V			Common terminal 1 of control signal is internally connected to common terminal 2.
V			Common terminal 2 of control signal is internally connected to common terminal 1.
Ka			Common compensation: switching control signal;Split compensation: Phase A switching control signal
Kb			Split compensation: Phase B switching control signal
Kc			Split compensation: Phase C switching control signal

              Common Compensation Contactless Switch Panel Diagram            Split Compensation Contactless Switch Panel Diagram

 Once the contactless switch triggers an "Over Temperature" alarm, the switching indicator light shall turn off immediately, and capacitor switching is prohibited.

Indicator Symbol
Display Color	Green	Green	Green	Green	Green	Yellow	Red
Meaning of Lamp On	Power Normal	Common compensation capacitor switched on	Phase A split compensation capacitor switched on	Phase B split compensation capacitor switched on	Phase C split compensation capacitor switched on	Cooling fan is operating	The temperature of the radiator exceeds 85℃
Meaning of Lamp Off	①	Common compensation capacitor switched off	Phase A split compensation capacitor switched off	Phase B split compensation capacitor switched off	Phase C split compensation capacitor switched off	Cooling fan stopped operating	Radiator temperature within normal range

①: Off or flashing indicates that the power supply voltage is less than or close to 85% of the rated value. The switching function is disabled under low voltage condition.

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