Function and use
NM3SD series isolating switches are suitable for circuits with AC 50Hz, rated operating voltage AC380/400/415V, and rated operating current 800A and below. In power distribution networks, they are mainly used to make and break circuits infrequently and to isolate power supplies. It has functions such as high-precision measurement, communication, time synchronization, and power outage reporting, and can provide effective support for refined management such as line loss analysis and power load analysis of the distribution network.
Detailed description
Parameters:
Voltage measurement accuracy: ±O.5%
Current measurement accuracy: ±0.5%
Electric energy measurement accuracy: 0.5s level
Rated minimum insulation voltage: 1000V
Advantages/core functions:
01 Fully functional
Full power measurement, current and voltage measurement accuracy up to 0.5%, electric energy 0.5S level, providing accurate data support
02 Double protection
The double protection structure of the upper and middle covers effectively prevents the failure of electronic components caused by external factors such as static electricity
03 Zhilian Interoperability
has multiple communication methods such as RS485 and HPLC, which can be remotely "four remote" to achieve intelligent unattended operation
Detailed parameters
< td>Electrical life (times)4000
| Parameter classification | Parameter items | Parameter values |
|---|
| Product model | NM3SD-250< /td> | |
| NM3SD-400 | |
| NM3S D-630 | |
| NM3SD-800 | |
| Rated current Inm (A) | | 250 |
| | 400 |
| | 630 |
| | 800 |
| Number of poles | | 3P |
| Rated current In (A) | | 100/125/160 |
| | 200/250 |
| | 250/315/40 0 |
| | 400/500/630 |
| | 630/700/800 |
| Rated insulation voltage Ui (V) | | 1000 |
| Rated impulse withstand voltage Uimp (kV) | | 8 |
| | 12 |
| | 12 |
| | 12 |
| Rated operating voltage Ue (V) | | AC380/400/415 |
| Rated operating frequency f (Hz) | | 50 |
| Flashover distance (mm) | | ≤50 |
| | ≤100 |
| | ≤100 |
| | ≤100 |
| Comply with standards | | GB/T14048.3 IEC60947-3 |
| Usage category | | AC-23A, AC-22A |
| Applicable working environment temperature (℃) | | -25~+70 |
| Rated short-time withstand current Icw, 1s (kA) | | 3 |
| | 5 |
| | 8 |
| | 10 |
| Mechanical life (times) | | 15000 |
| | 8000 |
| | 8000 |
| | 4000 |
| 6000 |
| | 5000 |
| |
| | 1000 |
| Outline and installation dimensions (mm) | Width (W) | 107/142 |
| | 140/184 |
| | 140/184 |
| | 182/240 |
| High (H) | 165 |
| | 257 |
| | 257 |
| | 257 |
| Deep (D) (Including handle) | 82.5 (105) |
| | 107.5 (161) |
| | 107.5 (161) |
| | 113 (166) |
