CHINT Modular Contactor 230V

• The CHINT NCH8 Series Modular AC Contactor is a reliable and versatile solution for remote switching and control in AC power systems.
• Designed for AC 50/60Hz circuits with operating voltages up to 400V and currents up to 63A, these contactors are ideal for applications categorized under AC-1 and AC-7a (non-inductive or low-inductive loads like domestic appliances and resistance furnaces).
• They can also handle AC-7b (household motor loads) when properly derated. Key features include a compact, modular design for easy DIN rail mounting, quiet operation without hum, and enhanced safety through high-performance insulation.
• This description covers the 230V AC coil versions for models NCH8-20/11 (20A, 1NO+1NC), NCH8-20/20 (20A, 2NO), NCH8-25/40 (25A, 4NO), and NCH8-63/11 (63A, 1NO+1NC).

Features

• Compact and modular design fits standard distribution boxes.

• Quiet operation: No electromagnetic hum during operation.

• High-performance insulation materials for enhanced operational safety.

• Standard TH35-7.5 DIN Rail mounting for easy installation.

• Elegant appearance suitable for visible installations.

• IP20 protection against finger contact and solid objects.

• Available configurations: 1NO+1NC, 2NO, 4NO (for specified models).

• Reliable switching within a wide operating voltage range (85%-110% of rated coil voltage).

• Complies with IEC/EN 61095 and IEC 60947-4-1 standards.

• Clear mounting instruction diagram appended.

Benefits

• Space Saving: Modular design optimizes space within control panels and enclosures.

• Noise Reduction: Silent operation makes it perfect for residential, commercial, and noise-sensitive applications (offices, hospitals).

• Enhanced Safety: Superior insulation minimizes electrical risks.

• Simplified Installation: DIN rail compatibility and clear diagrams ensure quick and convenient setup.

• Application Flexibility: Suitable for a wide range of resistive and low-inductive loads, plus motor loads with derating.

• Reliable Performance: Consistent operation even with voltage fluctuations ensures system stability.

• Versatile Control: Multiple contact arrangements cater to diverse circuit requirements.

Technical Specifications

General & Environmental Specifications:

• Series: NCH8
• Type: Modular AC Contactor
• Standards: IEC/EN 61095, IEC 60947-4-1
• Rated Frequency: 50/60 Hz
• Rated Insulation Voltage (Ui): 500 V
• Rated Impulse Withstand Voltage (Uimp): 4 kV
• Coil Control Voltage (Us): 230V AC (for these models)
• Operating Voltage Range: Pickup 85%~110% Us, Release 20%~75% Us
• Enclosure Protection: IP20
• Ambient Temperature: -5°C to +40°C
• Relative Humidity: <50% at +60°C; up to 90% at +20°C
• Maximum Altitude: 2000 m
• Pollution Class: 2
• Installation Category: II
• Mounting: TH35-7.5 DIN Rail
• Mechanical Life: 1,000,000 cycles (100 x 10⁴ times)
• Electrical Life (AC-1/AC-7a): 100,000 cycles (10 x 10⁴ times)
• Rated Duty System: 8-hour duty, Uninterrupted duty, Intermittent periodic duty
• Operation Frequency (Max, AC-1/AC-7a): 360 cycles/hour

Model-Specific Performance & Ratings:

Connection Requirements (Copper Wire):

• Wiring Note: Up to 2 wires of the same type and cross-sectional area can be connected per terminal.

Ideal Use

• Remote switching and control in residential, commercial, and industrial buildings.

• Control of lighting circuits.

• Heating, Ventilation, and Air Conditioning (HVAC) systems.

• Switching non-inductive loads (AC-1 category).

• Control of domestic appliances and similar low-inductive loads (AC-7a category).

• Controlling household motor loads like pumps or fans (AC-7b category) - Requires derating.

• Use in building automation systems.

Tips

• Professional Installation: Installation and maintenance must be performed by qualified electrical technicians.

• Safety First: Always turn off the power supply before installation, wiring, or maintenance. Avoid touching conductive parts when powered.

• Environment: Do not install in environments containing flammable gases, explosive risks, or excessive moisture/condensation.

• Short-Circuit Protection: These contactors are not designed to break short-circuit currents. Always use them with a suitable upstream short-circuit protection device (like an MCB).

• Motor Loads (AC-7b): When controlling motor loads, ensure you use the specified AC-7b current rating (Ie), which is lower than the AC-7a rating.

• Wiring: Use appropriate copper wire sizes and adhere to the specified tightening torques to ensure secure connections.

• Mounting: Securely snap onto a standard TH35-7.5 DIN rail.

• Maintenance: Perform visual inspections and operational checks (smooth pick-up/release) monthly. Do not disassemble the unit. Replace the contactor if it appears damaged or operates unreliably.