Function and use
CHINT Xinrui NM5DC series DC plastic case circuit breakers are suitable for circuits with rated voltage DC1500V and below and rated current 800A to 1600A. As a means of making, breaking and carrying rated current, it can reliably protect lines and electrical equipment when they are overloaded or short-circuited. The products can be widely used in power distribution application scenarios in various industries such as communications, new energy, and power supply.
Detailed description
Parameters:
Rated working voltage: DC750/1000/1500
Rated working current: 800A~1600A
Rated ultimate breaking capacity: 25kA/36kA
Rated operating breaking capacity: full series Ics=100%Icu
Advantages/core functions:
01 Excellent performance
The rated operating voltage can reach up to DC1500V, meeting high-voltage DC power consumption scenarios
02 Long life
The mechanical life of the product can reach 15,000 times, greatly reducing later operation and maintenance replacement costs
03 Safe and reliable
The product is suitable for -40~+75℃ operating environment and can still operate reliably in various harsh environments
Detailed parameters
| Parameter classification | Parameter item | Parameter value |
|---|
| Product model | NMSDC-1250 | 800, 1000, 1250 |
| NMSDC-1600 | 1000, 1250, 1600 |
| Rated operating current In(A),40℃ | | |
| Electrical performance | Rated operating voltage Ue(V) | DC 500V/750/1000/1500V |
| Rated insulation voltage Ui(V) | 1600 |
| Rated impulse withstand voltage Uimp(kV) | 12 |
| Number of poles | 3P4P |
| Breaking capacity | Q | |
| 2P* | DC 500V: 70, DC 750V: -, DC 1000V: -, DC 1500V: - |
| 3P | DC 500V: -, DC 750V: 70, DC 1000V: 50, DC 1500V: 25 |
| 4P | DC 500V: -, DC 750V: -, DC 1000V: 70, DC 1500V: 36 |
| 2P* | DC 500V: 70, DC 750V: -, DC 1000V: 50, DC 1500V: 25 |
| 3P | DC 500V: -, DC 750V: 70, DC 1000V: 70, DC 1500V: 70 |
| 4P | DC 500V: -, DC 750V: -, DC 1000V: 70, DC 1500V: 70 |
| Rated ultimate short circuit breaking capacity Icu(kA) | DC 500V | 70 |
| DC 750V | 70 |
| DC 1000V | 50 |
| DC 1500V | 25 |
| Rated operating short-circuit breaking capacity Ics(kA) | DC 500V | 70 |
| DC 750V | 70 |
| DC 1000V | 50 |
| DC 1500V | 25 |
| Comply with standards | | IEC/EN 60947-2, GB/T 14048.2 |
| Selective category | | A |
| Working environment temperature (℃) | | +40℃ ~ +75℃ |
| Isolation function | | ☐ |
| Wiring method | | Up/down free entry |
| Flashover distance (mm) | | ≤ 50, Zero flashover (customized) |
| Mechanical life (times) | Maintenance-free | 15000 |
| Maintained | 20000 |
| Electrical life (times) | DC 1000V | 2500 |
| DC 1500V | 2000 |
| Protection type | Distribution protection | ■ |
| Electric Machine protection | ■ |
| Installation and connection | Fixed | Front connection |
| Outline dimensions | Width W(3P/4P) | 210/280 |
| High H | 286 |
| Deep D | 167 |
| Note | 2P product appearance is consistent with 3P | |
