China CJ19 Series Capacitor Switching Contactors 380V 50/60Hz Suppliers, Supplier

How does the inrush current suppression mechanism operate?

The contactor utilizes an upper-layer suppression system with three pairs of precharge contacts and closing resistors. Upon energization, the precharge contacts engage first to absorb initial transient currents. Milliseconds later, the main working contacts close, and the precharge contacts release via spring reaction to bypass the resistors, allowing normal capacitor operation.

What is the peak transient surge suppression capability?

The CJ19 series contactor possesses the capability to suppress capacitor switch-on inrush current (flashy flow) up to 20 times the rated operational current (20Ie).

What mounting options are available for these contactors?

Contactors rated at 12, 18, and 20 kvar provide dual installation versatility: they can be mounted using standard screws or clipped directly onto 35mm standard DIN rails via bottom sliders.

What auxiliary contacts are configured with each model?

Models rated for 12, 18, and 20 kvar are equipped with two pairs of auxiliary contacts, whereas larger 30 kvar units feature three pairs of auxiliary contacts to suit broader control requirements.

What fuse specifications are recommended for short-circuit protection?

For 400V capacitor main circuits, RT19-type cylindrical fuses sized between 1.5 to 2.5 times the rated current (Ie) are recommended. For control circuits operating below 500V, RT19-type 16A gF fuses are suggested.

Which coil control voltages can be specified?

Standard options include 24V, 36V, 48V, 110V, 127V, 220V, 380V, 415V, 550V, and 660V AC (50Hz), customizable according to network voltage requirements.