DC Protection Series Circuit Breaker

As a professional high quality DC Protection Series Circuit Breaker manufacturer, you can rest assured to buy DC Protection Series Circuit Breaker from our factory. And we will offer you the best after-sale service and timely delivery.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).

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Product Description

Wenzhou Changjiu Technology Co., Ltd. is a professional China DC Protection Series Circuit Breaker manufacturer and supplier, known for its quality service. Adhering to the pursuit of perfect quality of products, so that our DC Protection Series Circuit Breaker have been satisfied by many customers. In order to ensure the quality and customer needs, we have cooperated with domestic power groups with strong production strength. We will strictly screen each supplier and send videos to customers to watch.

Categories	DC Series
Model	JB Type
Rated insulation voltage	1000V DC
Breaking capacity	10kA
Impluse voltage	4kV
Electrical connection	By the bottom for In and Out
Number of poles	1P 2P 3P 4P
Rated service breaking capacity	100 % of the Icu
Mechanical	20,000 cycles
Degree of pollution	2
Category	A (no delay in accordance with IEC / EN 60947-2 st
Tropicalisation	Relative humidity: 95 % at 55°C in accordance with
Terms of Payment	L/C, Western Union, Money Gram, T/T, Paypal

Construction and Feature

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 OFF position as a safety measure for 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:

■ a residual current device at the AC end

■ a fault passage detector (insulation monitoring device) at the DC end

■ 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 polanity 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.

Meaning and classification models

Main characteristics

Operating voltage (Ue)	1P=250V DC,2P=500V DC 3P=750 V DC, 4P=1000V DC
Rated insulation voltage(Ui)	1 ,000V DC
Breaking capacity (Icu)	10kA
Impulse voltage (Uimp)	4kV
Electrical connection	By the botom for In and Out
Number of poles	1P, 2P, 3P, 4P
Standards	IEC 60947-2 EN 60947-2

Characteristic Curve

■ Position contact indication - suitabilty for isolation according to IEC/EN 60947-2 standard.

■ The presence of the green strip guarantees physical opening of the contacts and allows operations to be performed on the downstream circuit in complete safety.

■ Increased product service life thanks to fast closing independent of the speed of actuation of the toggle.

■ Pre -wired product: Input / Output on the same side.

Power Coumption

Rated service breaking capacity (lcs)		100% of the lcu
Endurance(O-C)	Electrical	1,500 cycles(whern L/R=2 ms)
	Mechanical	20,000 cycles
Mechanical		20,000 cycles
Degreen of pollution		2
Category		A (no delay in accordance with IEC1 EN 60947-2 standards)
Degree of protection Device in modular (IEC 60529) enclosure		IP40
Tropicalisation		Relative humidity: 95 % at 55C in accordance with IEC 60068-2 and GB 14048.2 standards
Temperature	Operating	-25℃ to70 ℃
	Storage	-40℃ to 85℃