What Is AC Contactor For Switching Shunt Power Capacitor？
The ZHIMING brand of the CJ19 series AC contactor is specially designed for switching shunt capacitors in low-voltage reactive power compensation systems. It operates reliably in AC 50/60Hz networks with rated voltages up to 690V. This AC contactor series is widely applied in power distribution systems, capacitor banks, and automatic power factor correction devices.
Working Conditions of the AC Contactor For Switching Shunt Power Capacitor
- Ambient Temperature: –5°C to +40°C; daily average not exceeding +35°C.
- Altitude: Installation site should not exceed 2000 meters above sea level.
- Ambient Humidity: At +40°C, the relative humidity should not exceed 50%.
- Pollution Degree: Class 3 (in accordance with IEC standards).
- Installation Category: Class III.
- Mounting Requirements: The inclination of the mounting surface shall not exceed ±5°.
Compliance Standards of the AC contactor
IEC 61869 – Instrument transformers standard
Note: Actual capacitor capacity may vary depending on voltage level and harmonic conditions.
For harmonic-rich environments, anti-harmonic reactors or detuned reactors are recommended.
Product Parameters
| Model | Rated Current (A) | Rated Voltage (V) | Capacitor Capacity (kvar) | Typical Application |
|---|---|---|---|---|
| CJ19-25 | 25 A | 380 / 400 V | 5 ~ 10 kvar | Small APFC units, single capacitor switching |
| CJ19-32 | 32 A | 380 / 400 V | 10 ~ 15 kvar | Distribution boxes, small industrial systems |
| CJ19-43 | 43 A | 400 / 415 V | 15 ~ 20 kvar | Reactive power compensation cabinets |
| CJ19-63 | 63 A | 400 / 415 V | 20 ~ 30 kvar | Multi-stage capacitor banks |
| CJ19-85 | 85 A | 400 / 415 V | 30 ~ 40 kvar | Medium-sized power factor correction systems |
| CJ19-95 | 95 A | 400 / 415 V | 40 ~ 50 kvar | Industrial APFC cabinets, modular designs |
| CJ19-115 | 115 A | 400 / 690 V | 50 ~ 60 kvar | Heavy-duty load compensation |
| CJ19-150 | 150 A | 400 / 690 V | 60 ~ 75 kvar | High-capacity capacitor banks |
| CJ19-170 | 170 A | 400 / 690 V | 75 ~ 100 kvar | Centralized compensation in factories |
Specification & Dimensions of the AC contactor
Why Choose AC Contactor For Switching Shunt Power Capacitor?
Optimized for Capacitor Switching
Built-in design ensures safe and stable switching of capacitive loads, reducing stress on the network.
Surge Suppression
When equipped with a surge suppression module, it effectively controls inrush current during closing and suppresses overvoltage during disconnection, prolonging the lifespan of the capacitor and system.
High Electrical Endurance
Designed for frequent operations, the contactor delivers consistent performance under industrial conditions.
Compact & Easy Installation
Modular structure supports fast installation and integration into compensation cabinets or control panels.
Reliable Performance
Manufactured according to international standards (IEC/GB), ensuring compatibility and safety.
FAQ
What is the AC contactor used for?
The AC contactor is specifically designed for switching shunt capacitors in low-voltage reactive power compensation systems. It works in AC 50/60Hz circuits with rated voltages up to 690V, making it suitable for industrial power factor correction applications.
Does the CJ19 series contactor have surge protection?
Yes, the CJ19 series comes with optional surge suppression features. This helps reduce inrush current and overvoltage when switching capacitor banks, protecting both the contactor and connected equipment from electrical stress during operation.
What is the minimum order quantity and delivery time for CJ19 series?
The minimum order quantity for CJ19 series AC contactors is 100 pieces. Stock time typically ranges from 7 to 15 days depending on specific model requirements and current inventory availability.
