CHINT NM8N-HV High-Voltage MCCB
The CHINT NM8N-HV series molded case circuit breaker is designed for high-voltage AC distribution and photovoltaic applications up to 1150 V AC. It provides overload, short-circuit and undervoltage protection for equipment such as string inverter outputs and AC combiner boxes.
Key Features
- Maximum rated operational voltage: 1150 V AC
- Frame sizes: 250 A, 400 A and 630 A
- 3-pole configuration
- Thermal-magnetic and magnetic trip-unit options
- Zero-arcing interruption design for high-voltage applications
- Ambient operating range: -40 °C to +70 °C
- Complies with IEC/EN 60947-2
Technical Specifications
| Model | NM8N-HV |
|---|---|
| Product type | High-voltage molded case circuit breaker (MCCB) |
| Rated operational voltage Ue | AC 690 / 800 / 1000 / 1150 V |
| Rated insulation voltage Ui | 1250 V |
| Frame size current | 250 A / 400 A / 630 A |
| Poles | 3P |
| Trip unit | Thermal-magnetic (TM) or magnetic (M) |
| Ambient temperature | -40 °C to +70 °C |
| Standard | IEC/EN 60947-2 |
Typical Applications
Suitable for photovoltaic power systems, string inverter output protection, AC combiner boxes and other high-voltage AC power-distribution systems. Final model selection must be based on the required voltage, rated current, breaking capacity and trip-unit configuration.
NM8N-HV Catalog and Technical Data
