CJ19-170 Contactor Series

Chint CJ19-170 is a 3-pole capacitor-duty AC contactor designed for switching shunt capacitors in low-voltage power factor correction (PFC) systems. With a rated current of 130A (AC-6b at 400V), controllable capacity up to 90 kVAr at 400V, and integrated inrush current suppression, it is suitable for medium-to-large capacitor steps in industrial and commercial APFC panels.

Key Features 

• 3-pole capacitor-duty contactor for low-voltage PFC and capacitor banks

• Rated current 130A in AC-6b duty at 400V, Ith up to 275A

• Controllable capacitor capacities:

  • 52 kVAr at 220/240 V

  • 90 kVAr at 380/400 V

  • 75 kVAr at 690 V

• Rated operational voltage (Ue) up to 690V, insulation voltage (Ui) 690V

• Built-in surge restraining device (current-limiting resistance) to suppress inrush current

• Multiple AC coil voltage options: 110V, 220V, 230V, 240V, 380V (variant dependent)

• Auxiliary contacts typically 3 NO power contacts plus 1 NO + 1 NC or 1 NO auxiliary contact.

• Suitable for 50/60 Hz power systems

• Mechanical durability up to 100,000 cycles and electrical durability up to 10,000 cycles

• Designed for operation at altitudes up to 2000 m and temperatures from -5°C to +40°C

• Complies with IEC 60947-4-1 and CE requirements for low-voltage switchgear

Technical Specifications 

Applications 

• Automatic power factor correction (APFC) panels with medium-to-large kVAr steps

• Fixed and step-controlled capacitor banks in low-voltage distribution systems

• Reactive power compensation in industrial plants and commercial buildings

• PFC units integrated in MCCs, LT panels and utility boards

• Capacitor banks for large HVAC, chiller, compressor and motor loads

• Any low-voltage network requiring reliable switching of high kVAr shunt capacitors

What’s in the Box?

• 1 × Chint CJ19-170 Capacitor Duty Contactor (coil voltage and aux configuration as ordered)

• Product label with ratings and terminal identification

• Manufacturer’s basic instruction/leaflet (if supplied by OEM)

FAQ 

Q1. What is the main application of the Chint CJ19-170 contactor?
A1. The CJ19-170 is designed for switching shunt capacitors in low-voltage power factor correction systems and automatic capacitor banks. It is not intended as a standard motor starter contactor.

Q2. What capacitor sizes can CJ19-170 typically handle?
A2. Typical controllable capacities are 52 kVAr at 220/240 V, 90 kVAr at 380/400 V, and 75 kVAr at 690 V, depending on system conditions and capacitor specifications.

Q3. Why is inrush current suppression needed for capacitor switching?
A3. When capacitors are switched on, very high inrush currents flow. CJ19-170 includes a current-limiting resistance device that closes before the main contacts, limiting inrush and protecting both the contactor and capacitors.

Q4. Which coil voltages are available?
A4. The CJ19-170 series is available with several AC coil voltages, typically 110V, 220V, 230V, 240V, and 380V AC. The required coil voltage must be specified when ordering.

Q5. What auxiliary contact options are offered?
A5. Variants commonly provide 3 NO main contacts plus 1 NO + 1 NC or 1 NO auxiliary contacts for status indication, interlocking, and APFC controller feedback.

Q6. In what environments can CJ19-170 operate?
A6. It is suitable for -5°C to +40°C ambient at altitudes up to 2000 m in standard industrial and commercial LV switchboards.