3P DC Miniature Circuit Breaker

PUGAO comes from a Zhejiang factory with 14 years of experience in low-voltage electrical manufacturing. Each product undergoes full inspection at the workstation and supports OEM branding, sample testing, and bulk full container orders. It is supplied to system integrators, EPC contractors, and overseas distributors. Mora PLS60HDC 3P DC Miniature Circuit Breaker, rated current C63, rated voltage 1000V DC, breaking capacity 10kA. Complies with IEC 608981.

It is a dedicated DC MCB, only for DC circuit, widely used in solar PV combiner box. It provides overload and shortcircuit protection, no residual current protection. 3pole linked design. Only copper wire can be connected. Mounted on standard 35mm DIN rail.

Advantage

On the one hand, the three pole series connection can enhance the system's voltage resistance and meet the requirements of 750V high-voltage DC breaking; On the other hand, for the three wire floating ground DC topology, all three conductors can be cut off simultaneously to achieve complete electrical isolation during maintenance, avoiding the risk of electric shock to operation and maintenance personnel caused by stray current and floating voltage after single point disconnection. The integrated design of the handle ensures synchronous operation and eliminates safety hazards such as single pole misoperation or missing points.

The internal conductive components are made of high-purity copper to reduce the temperature rise of the circuit; Silver nickel alloy contacts are resistant to welding and arc erosion. After long-term repeated opening and closing, the contact resistance remains stable, greatly reducing the probability of overheating and fire under high current conditions. The temperature rise verification test is completed according to IEC standards before leaving the factory.

Rated current: 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A; The maximum DC voltage is 750V; the working environment is -25 ℃~+70 ℃, and outdoor photovoltaic cabinets, non air conditioned energy storage rooms, and industrial control cabinets can operate stably in high and low temperature fluctuation environments.

The factory has ISO9001 and intellectual property management system certification for 3P DC Miniature Circuit Breakers. The automated testing station conducts comprehensive overload, short circuit, and withstand voltage testing on each product, with a defect rate controlled at 0.1% level. Support laser marking of customer brands, customized packaging, flexible acceptance of small batch trial orders and large batch container orders, complete customs declaration documents, and meet global export compliance.

Product interpretation: Mora PLS60HDC 3P DC miniature circuit breaker (DC MCB, no leakage)

This is a DC dedicated circuit breaker with 3 poles, C63， Mostly used for photovoltaic DC combiner boxes, only for overload and short circuit protection, without leakage protection.

Parameter Information

Brand: Mora

Model: PLS60HDC

Specification: 3P C63

C63: C-type trip, rated current 63A

Rated DC voltage: 1000V DC

Rated short-circuit breaking ICU: 10kA

Execution standard: IEC 608981

Installation: 35mm standard DIN rail

Label Cu Only: Suitable only for copper wires

Product Features and Applications

DC dedicated MCB cannot be directly used for AC power; Mainly used for photovoltaic DC side (solar photovoltaic panels, combiner box DC circuit)

3-pole linkage, synchronized closing/opening of three poles, safe isolation of DC high voltage circuit

C-trip curve: able to withstand a certain impact current, suitable for photovoltaic DC loads

Protection function: overload protection+short circuit protection, no leakage protection

Key point: The arc extinguishing structure of DC circuit breakers is different from that of AC circuit breakers, and it is strictly prohibited to use them as AC circuit breakers. The wiring should strictly follow the polarity arrow (+/) on the body, and the positive and negative DC poles should not be reversed.

Application：

The 1.2MW ground photovoltaic power station in Southeast Asia has a partial series open circuit voltage of 720V, and the 2P DC circuit breaker's withstand voltage is not sufficient to cover this operating condition. C65-3P DC circuit breakers are selected for the branch of the combiner cabinet, with three poles connected in series to enhance the withstand voltage. When a short circuit fault occurs due to cable damage in one branch, the three poles are synchronously disconnected, the faulty branch is isolated, and the remaining series generate electricity normally. During operation and maintenance, the circuit breaker was disconnected and there was no residual voltage in the branch, ensuring the safety of on-site construction personnel. The entire station has been running stably for over 2 years.

Domestic 250kWh industrial and commercial energy storage containers, with some battery clusters outputting voltages up to 700V DC. The battery cluster branch uses C65-3P DC circuit breakers. When a short circuit fault occurs within the cluster, it instantly completes the disconnection isolation. Only the faulty cluster exits operation, and the remaining battery clusters continue to work without the need to shut down the entire cabinet. Compared to fuses, after troubleshooting, it can be manually reset without the need to replace consumables, reducing the cost of maintenance materials and labor.

Inland new energy vessels have high-voltage direct current distribution cabins with narrow and enclosed spaces, and limited heat dissipation conditions. This 3P DC circuit breaker is selected for high-voltage DC branch protection, with a flame-retardant shell that is compatible with cabin safety regulations and three pole synchronous isolation, meeting the mandatory requirements for ship DC distribution maintenance isolation.

Important tips for selection and installation

1. It is prohibited to replace DC 3P products with AC 3P circuit breakers: AC circuit breakers do not have permanent magnet DC arc extinguishing design, and short circuits under high voltage DC may cause arcs that cannot be extinguished, leading to fire and explosion. Mixing is strictly prohibited.

2. Strictly follow the polarity identification of the body for wiring. Incorrect wiring will change the direction of the permanent magnet arc blowing magnetic field, directly causing arc extinguishing failure.

3. Torque specification: The wiring terminals should be tightened according to the recommended torque to prevent the cables from overheating due to virtual connections; It is recommended to use multi strand copper wire with a wire nose.

4. Reserved margin for voltage selection: When selecting a photovoltaic system, the maximum open circuit voltage of the components under low temperature conditions should be selected to ensure that the actual operating voltage does not exceed the rated DC voltage of the circuit breaker.

5. Maintenance instructions: The product is a non repairable structure that can withstand the impact of a large short-circuit current. Even if it can be manually closed, it is recommended to conduct a performance review and replace it with a new one if necessary.

Strength Description of PUGAO Factory

Zhejiang Pugao Electric Power was established in 2011, with a modern production plant of 5000 square meters. It has its own injection molding, contact riveting, assembly, and fully automatic testing production lines. For 14 years, it has focused on the research and development of low-voltage distribution products, with a technical team accounting for 10% of the total number of people.

We can handle both small-scale sample trial orders and large-scale container orders, with flexible MOQ;

Providing laser marking, private molds, and customized packaging can all be achieved to meet the needs of our own brand customers;

We provide corresponding certificates such as CE and test reports to assist in completing customs clearance documents;

Engineers provide remote selection suggestions and wiring guidance to assist customers in solving on-site project problems;

It can be purchased in conjunction with our brand's 1P/2P DC circuit breakers, surge protectors, and isolation switches to reduce the cost of connecting multiple suppliers.

FAQ

Q: Can 3P DC Miniature Circuit Breaker only be used in three wire DC systems?

A: No, it's not. In a large number of industrial and commercial high-voltage two-wire DC scenarios, engineers will connect the internal three poles of 3P in series to enhance the overall voltage resistance level and protect the high-voltage two-wire DC circuit. This is a mature application solution in the industry.

Q: How to choose and distinguish between C65-3P DC and 2P DC?

A: When the system voltage is ≤ 600V, 2P is preferred for two-wire floating ground systems; when the DC voltage is higher or in a three wire DC topology, it is necessary to simultaneously cut off three conductors for complete isolation, then 3P DC circuit breakers are selected.

Q: Can I apply for sample testing?

A: Support sample ordering and provide samples for laboratory breaking and temperature rise performance verification.

Q: Can I print my own brand logo?

A: Support, capable of laser marking on the body and customizing outer packaging boxes to meet OEM private labeling needs.