4P DC1000V 40A 6KA DC Miniature Circuit Breaker

GREENWATT specializes in manufacturing 4P DC1000V 40A 6KA DC miniature circuit breaker, designed specifically for solar photovoltaic (PV) systems and high-voltage DC power distribution environments. This product has a rated voltage of 1000V DC, a rated current of 40A, and a short-circuit breaking capacity of 6KA. By combining the 4P structure with series and parallel connections between the electrodes, it effectively addresses the arc-extinguishing challenge of DC circuits lacking natural zero-crossing points, providing reliable short-circuit and overload protection for your DC equipment, inverters, and energy storage cabinets.

Product Core Technology Overview

In modern DC power distribution systems, the increasing voltage levels place higher demands on the arc-extinguishing capabilities of circuit breakers. The 4P DC1000V 40A 6KA DC miniature circuit breaker features a modular design, allowing for flexible wiring configurations through its 4-pole (4P) physical structure.

Application Logic in 1000V DC Systems

Because DC current does not have a natural zero-crossing point like AC current, interrupting high-voltage DC arcs is extremely difficult. This GREENWATT circuit breaker recommends using 2P series or specific parallel wiring configurations. By using two or more poles of the 4P circuit breaker in series, the electrical clearance of the arc-extinguishing chamber can be increased, thereby achieving safe interruption under 1000V DC high voltage. This configuration is widely used in medium-sized energy storage systems and high-voltage DC distribution cabinets.

Dual Overload and Short Circuit Protection

Overload Protection: When the circuit current exceeds the rated 40A for an extended period, the internal thermal element will trigger tripping.

Short circuit protection: The 4P DC1000V 40A 6KA DC miniature circuit breaker has a breaking capacity of 6KA, which means that it can quickly disconnect the physical link when encountering a huge instantaneous short circuit current, preventing cables and inverters from being damaged by high temperature.

wiring diagram:

Wiring Scheme and Installation Guide

1000V 2P Configuration Principle

To ensure safety in 1000V high-voltage environments, users typically reconfigure the 4P DC1000V 40A 6KA DC miniature circuit breaker. For example, two poles are connected in series as the positive terminal, and the other two are connected in series as the negative terminal. This method utilizes the ample space of the 4P unit, improving the overall insulation level and ensuring robust operation in 1000V DC environments.

Physical Design and Installation

Compact Layout: Even with the 4P structure, GREENWATT has optimized the size, reducing its space occupation within the distribution box.

Standard Rail Mounting: Compatible with standard 35mm DIN Rail; installation simply requires snapping in and tightening the terminals.

FAQ

Q: Can a 4P circuit breaker be connected to a 1000V system using only 2P terminals?

A: It is not recommended. For a 4P DC1000V 40A 6KA DC miniature circuit breaker, to achieve a safe arc-extinguishing voltage of 1000V, the voltage load is usually shared by connecting the terminals in series. Please refer to the specific wiring diagram for operation.

Q: Is a 6KA breaking capacity sufficient for a photovoltaic system?

A: In most residential and medium-sized commercial and industrial photovoltaic systems, a 6KA short-circuit breaking capacity is sufficient to cover its expected short-circuit current level and effectively protect downstream sensitive equipment.

Q: Does this product support OEM or customization?

A: Yes. In addition to the standard 4P 1000V 40A 6KA DC miniature circuit breaker, GREENWATT can also provide customized solutions according to your technical requirements.