DC Mini Circuit Breaker(MCB) Non-Polarized DC Breaker with TUV Certificates From 1A to 63A
The JB is a DC circuit breaker dedicated to multi-string photovoltaic installations.
This circuit breaker is designed to protect the cables located between each string of photovoltaic modules and the photovoltaic inverter against overloads and short circuits (see application diagram).
Combined with a switch, the JB will be installed in a string PV protection enclosure at the end of each string of photovoltaic modules.
It can be locked (by a padlocking device) in the OFF position as a safety measure for the removal of the PV inverter.
Since a fault current can flow in the reverse direction to the operating current, the JB can detect and protect against any bidirectional current.
To ensure the safety of the installation, it is necessary, depending on the various types of application, to combine the JB with:
1. a residual current device at the AC end,
2. a fault passage detector(insulation monitoring device) at the DC end
3. an earth protection circuit breaker at the DC end
In all cases, fast action on site will be required to clear the fault (protection not ensured in the event of a double fault).
JB is not polarity sensitive: (+) and (-) wires can inversed without any risk.
The JB is: delivered with three inter-pole barrier to provide increased isolation distance between two adjacent connectors.
Main characteristics
| Operating Voltage (Ue) | 1P=250 V DC, 2P=500 V DC 3P=750 V DC, 4P=1000 V DC |
| Rated insulation voltage (Ui) | 1,000 VDC |
| Breaking capacity (Icu) | 10 kA |
| Impulse voltage (Uimp) | 4 kA |
| Electrical connection | By the bottom for In and Out |
| Number of poles | 1P, 2P, 3P, 4P |
| Standards | IEC 60947-2 EN 60947-2 |
| Rated service breaking capacity (Ics) | 100% of the Icu | |
| Endurance (O-C) | Electrical | 1,500 cycles (where L/R=2 ms) |
| Mechanical | 20, 000 cycles | |
| Mechanical | 20, 000 cycles | |
| Degree of pollution | 2 | |
| Category | A (no delay in accordance with IEC / EN 60947-2 standards) | |
| Degree of protection (IEC 60529) | IP40 | |
| Tropicalisation | Relative humidity: 95% at 55 degree in accordance with IEC 60068-2 and GB 14048.2 standards | |
| Temperature | Operating | -25 to 70 degree |
| Storage | -40 to 85 degree | |
Why You Choose Us:
1. Over 16 years manufacturing experience in metal push button switch
2. 100% technical support to save your time and cost
3. Strict quality control with CE, ROHS, REACH certificated, UL certified for plastic base
4. Fast delivery within 7- 30 days, hundreds to thousands
5. Free samples with your freight collect account
6. Selectable packing for your logo
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Frequently Asked Question:
1. What is the delivery leading time?
Around 7-30 days depending on your quantity.
2. Could you help us to buy other goods?
Sure. It is our pleasure to work with you.
3. Will you help us to check the express fees?
Certainly. We will send you the different kinds of express fees and packing information for your reference.
4. What are your payment ways?
We accept Paypal, Alipay, T/T, and L/C, etc.
5. Where is the port nearest to you?
We are nearest to Shanghai, Ningbo, and Yiwu.