Function and Application
The NKB8-63 series of control and protection switchgear (hereinafter referred to as "switch" or CPS) is mainly applied in low-voltage distribution and motor control and protection circuits with AC 50Hz, rated operating voltage up to 690V, and rated operating current from 1.2A to 63A.
Detailed Description
Parameters:
Current housing: 63
Rated operating voltage: ≤690V
Rated operating current: 0.15~63A
Advantages/Core Functions:
01 Compact structure, reliable functions
02 Capable of overload and short-circuit protection of the circuit
03 High breaking capacity
Detail Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| 4 Technical Parameters | Frame Rating | 63 |
| Rated Operating Voltage Ue | 400V, 690V |
| Usage Category | AC-43, AC-44 |
| Agreed Heating Current Ith(A) | 12 32 63 |
| Rated Operating Current Ie(A) | 1.2, 2.4, 6, 12 18, 32 45, 63 |
| Rated Frequency | 50Hz |
| Pole Number | 3 |
| Rated Working System | Eight-hour working system, continuous working system, intermittent working system |
| Intermittent working system level 600, load factor 40% | |
| Rated Short-Circuit Breaking Capacity Ics | 50kA(AC400V), 4kA(AC690V) |
| Breaking Action Time | ≤ 2ms |
| Rated Insulation Voltage Ui | 690V |
| Rated Impulse Withstand Voltage Uimp | 6kV |
| Electrical Life (AC—A33, ten thousand times) | 100(AC400V) |
| Mechanical Life (ten thousand times) | 1000 |
| Table 2 Main Technical Parameters (Rated Current and Control Power) | Rated Operating Current Ie(A) | |
| Overload Setting Current Range Ir(A) | |
| Controlled Motor Power Pe(kW) | 400VAC 690VAC |
| 1.2 | 0.3-1.2 0.07-0.5 0.13-0.86 |
| 2.4 | 0.6-2.4 0.15-1.0 0.25-1.8 |
| 6 | 1.5-6 0.52-2.8 0.9-5.0 |
| 12 | 3-12 1.1-6.0 2.0-10 |
| 18 | 7.2-18 3.0-9.5 5.0-16 |
| 32 | 12-32 5.0-16.5 8.5-29 |
| 45 | 18-45 7.1-23.5 14-43 |
| 63 | 25-63 10-35 19-60 |
| Table 3 Main Technical Parameters (Control and Auxiliary Circuit) | Rated Control Power Supply Voltage Us | 230VAC/50Hz |
| Auxiliary Switch Circuit | 2NO+2NC |
| Control Power Supply Voltage Us: | DC-13, 110V/0.55A, 24V/5A |
| Auxiliary Signal Circuit | 2NO+1NC |
| Alarm Signal Circuit | 230VAC |
| Communication Module Circuit | 1NO |
| Maximum Coil Power: | 4VA |
| | 24VDC |
