Circuit Breakers for Use in Particular ApplicationsFor DC Special Voltages
Product Lineup
DC is more difficult to cut off than AC because there is no current zero point, and standard products are not available for DC high voltages. For this reason, use a circuit breaker for DC special voltages.
4-pole products are available for 550VDC and 600VDC. (The NF1250-SDW is a 3-pole product.)
| Model | NF63-SV | NF125-SV | NF250-SV | NF400-SW | NF630-SW | NF800-SDW | NF1250-SDW | NF1600-SDW | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated current (A) | 3 5 10 15 20 30 40 50 60 63 |
15 20 30 40 50 60 75 100 125 |
100 125 150 175 200 225 250 |
250 300 350 400 |
500 600 630 | 700 800 | 1000 1200 1250 | 1600 | |||||||||
| Number of poles | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 3 | 4 | ||
| IEC 60947-2 | Rated voltage (VDC) | 400 | 550 | 440 | 550 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 |
| Breaking capacity (kA) | 2/2 | 10/10 | 20/20 | 40/40 | 40/40 | 40/40 | 40/20 | 20/20 | 40/20 | ||||||||
| JIS C 8201-2-1 Ann.1 Ann.2 |
Rated voltage (VDC) | 400 | 550 | 440 | 550 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 | 500 | 600 |
| Breaking capacity (kA) | 2/2 | 10/10 | 20/20 | 40/40 | 40/40 | 40/40 | 40/20 | 20/20 | 40/20 | ||||||||
| Overcurrent tripping method | Thermal-electromagnetic | With instantaneous tripping operation only (Mag Only) |
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| Operating characteristics | Same as standard DC products | Same as standard AC products | Same as standard products | Instantaneous trip characteristic only * | |||||||||||||
| Reverse connection | Available | － | |||||||||||||||
* Same as Mag Only
- Notes:
- *1The time constant of the circuit should be 10ms or less. (5ms or less for 125A frame or below)
- *2The CE and UKCA marks are indicated as standard.
- *3The breaking capacity in is indicated on the circuit breaker.
- *4Vertical lead wire terminal blocks (SQLT) are not applicable.
Wires other than those shown in the diagram cannot be used because the trip characteristics will change.
Wiring for DC special voltages