Function and Usage
The NB7LE series residual current circuit breakers are suitable for AC 50Hz circuits with a rated voltage of single-pole two-wire, two-pole 230V, three-pole, three-pole four-wire, four-pole 400V, and a rated current up to 63A. When a person is electrocuted or the grid leakage current exceeds the specified value, the residual current circuit breaker can quickly cut off the faulty power supply in an extremely short time, protecting personal safety and electrical equipment. It can also be used for overload and short-circuit protection of the line, and in normal conditions, it is not frequently used to switch electrical devices and lighting circuits. It is especially suitable for lighting distribution systems in industrial and commercial applications. Complies with standards: GB/T 16917.1, IEC61009-1, and has obtained CCC certification.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| System Parameters | Rated Voltage (Up) | AC 230V (1P+N, 2P), AC 400V (3P, 3P+N, 4P) |
| Rated Current (In) | For type class current 32A: 6A, 10A, 16A, 20A, 25A, 32A |
| Rated Insulation Voltage (Ui) | 500V |
| Rated Impulse Withstand Voltage (Uimp) | 4kV |
| Rated Residual Operating Current (IΔn) | 0.03A, 0.1A, 0.3A |
| Rated Residual Non-operation Current (IΔno) | 0.5IΔn |
| Number of Poles | 1P+N, 2P, 3P, 3P+N, 4P |
| Rated Residual Trip Type | C Type, D Type |
| Rated Residual Make and Break Capacity (Icn) | 6000A (C6-C40), 4500A (C50, C53, D6-D53) |
| Rated Residual Operating Disconnection Time | See Table 2 |
| Performance Indicators | Overcurrent Protection Characteristics | See Table 3, Figure 1, Figure 2 |
| Electromechanical Life | See Table 4 |
| Terminal Connection | See Table 5 |
| Bending Torque | (1.5-2.0) N·m |
| Dimensions and Installation Dimensions | See Figure 3, Figure 4, Table 6 |
| Pollution Degree | Level 2 |
| Protection Level | IP20 |
| Adaptability to Environment | Type I, II |
| Communication | | |
| Protection Function | | |
| Installation | | |
