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DC Circuit Breaker

SL7-PV Special Miniature Circuit Breaker

The SL7 DC circuit breaker is a PV-specific DC protection system with a rated working voltage as high as DC 1200V. The solar DC circuit breaker uses a special arcing and limiting system, so that the fault current from the DC distribution system can be quickly turned off. This protects the photovoltaic modules and prevents AV feedback current caused by high DC reverse currents and inverter failures so the solar power system operates reliably.

Features and parameter
1. DC reverse current protection
2. AV feedback current protection
3. DC load isolation switch
4. Remote tripping and alarm
5. Indicator window
6. Make-break position indicating
7. Isolation function
8. Rated short circuit capacity: 6kA
9. Rated voltage: DC500V, DC750V, DC1000V, DC1200V
10. Poles: 1P, 2P, 3P, 4P
11. Impulse to withstand voltage: 1500V
12. Instantaneous trip type: B/C/D
13. Protection rating: IP20

Electrical Technical Parameters
Model SL7-63PV
Poles 1P 2P 3P 4P
Rated voltage UE ( V ) DC250V DC 550V/DC 800V (customizing ) DC750 DC800, DC1000, DC1200V
Rated current In ( A) 1 2 3 4 6 10 16 20 25 32 40 50 63
Rated short circuit capacity Icn (A) ( T=4ms ) 6 ( DC250V) 6 ( DC250V) 6(DC750V) 6(DC1000V)
Instantaneous trip type Distribution protection
Rated impulse to withstand voltage Uimp ( kV ) 4
Rated insulation voltage Ui 1200
Lifespan ( times ) With load 10,000+ times, without load 20,000+ times
Environmental conditions Ambient temperature : -25 ℃- +40 ℃
Optional accessories Shunt tripping device, undervoltage tripper
Maximum connection capacity 25mm2
Certificates CCC/CB/TUV certificates
Standards IEC 6047-1 GB14048-2 IEC60898-2 GB14048-1

Action characteristic curve

Environmental conditions
1. Altitude below 2000 meters. For special requirements, please contact us.
2. Ambient air temperature in a range from -25 ℃ to + 40 ℃, 24-hour average temperature should not exceed + 35 ℃;
3. Moist air resistant (three anti-type)
4. Salt mist corrosion resistant (three anti-type)
5. Mold-resistant (three anti-type)
6. The product should be installed in the power distribution box in waterproof places.


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Related names
DC circuit switch | Solar DC circuit breaker | Accessories for photovoltaic system