Function and use
Chint NM5T thermomagnetic molded case circuit breaker is suitable for AC 50/60Hz, rated voltage AC690V and below, and rated current 10A to 1000A circuits. As a means of making, breaking and carrying rated current, it can reliably protect lines and electrical equipment when they are overloaded, short-circuited or under-voltage. It can also be used as an infrequent starting and overload, short-circuit and under-voltage protection for motors. The product has the characteristics of safety, reliability, flexibility and ease of use, and intelligent IoT, and can be widely used in power distribution application scenarios in the 5G & communications industry.
Detailed description
Advantages/core functions:
01 Excellent performance
Insulation voltage up to AC1000V, more reliable operation in high-altitude environments
Ics=100%lcu, stronger breaking capacity, ensuring the reliability of circuit breaker breaking and the stability of user power consumption
02 Flexible and easy to use
The entire series of products can achieve free top/bottom cable entry
Industry-leading miniaturized design of accessories, 4 types of accessories can be installed at the same time, meeting a variety of extended functional requirements
03 Easy to use
The accessories realize box-type modular installation, the accessory frame is streamlined, easy to maintain and replace, and reduces the inventory of spare parts/spare parts
Detailed parameters
Parameter table 1
< td>
| Parameter classification | Parameter item | Parameter value |
|---|
| Product model | NM5T-125 | 1 6-20-25-32-40-50-63-80-100-125 |
| NM5T-250 | 80-160-180-200-225-250 |
| Rated operating current In(A), 40℃ | | |
| Electrical properties | Rated insulation voltage Ui (V) | 1000 |
| Rated impulse withstand voltage Uimp (kV) | 8 |
| Rated operating voltage Ue(AC)50/60Hz | 380/400/415, 660/690 |
| Number of poles | 3P |
| | 4P (3P+N, 4P) |
| Breaking energy Force | F |
| | Q |
| | F |
| | Q |
| Rated ultimate short circuit breaking capacity Icu(kA) | AC380/400/415V: 36
AC660/690V: 8 |
| Rated operating short-circuit breaking capacity Ics(kA) | AC380/400/415V: 36
AC660/690V: 4 |
| Comply with standards | IEC/EN 60947-2, GB/T 14048.2 |
| Usage category | A |
| Working environment temperature (℃) | -35~+70 |
| Isolation function² | |
| Wiring method | Up/down free entry³ |
| Arc distance | ≤ 50/Zero flashover (need to install short terminal cover TCV) |
| Mechanical life (times) | Maintenance-free: 20000
Maintenance available: 40000 |
| Electrical life (times) | AC380/400/415V,In: 10000 |
| Protection type | Distribution protection |
| Installation and connection | Fixed | Front-board connection |
| | Rear-board connection |
| Plug-in type | Front-board connection |
| | Rear connection |
| Withdrawable | Front connection |
| | Board back connection |
| Outline dimensions | Outline dimensions (mm) Width (W) × Height (H) × Depth (D) | 3P: 92×155×75.5
4P: 122×155×75.5 |
| | 92×155×91
122×155×91 |
| | 107×165×76.5
142×165×76.5 |
| | 107×165×101.5
142×165×101.5 |
| Note | 1. When wiring the lower incoming wire, the breaking capacity needs to be reduced to 75%. | |
Parameter table 2
< td>NM5T-630
| Parameter classification | Parameter item | Parameter value |
|---|
| System parameter | NMST-400 | 250-315-350-400 |
| 400-500-630 |
| NM5T-1000 | 630 -700-800-1000 |
| | 1000 |
| | 12 |
| | 380/400/415, 660/690 |
| | F |
| | Q |
| < /td> | | 50 |
| | 10 |
| | 50 |
| | 10 |
