4P AC Miniature Circuit Breaker

The Mora PLS-60H 4P AC Miniature Circuit Breaker is independently developed by the internal technical team of Pugao, with 14 years of experience in low-voltage electrical research and manufacturing. Before leaving the factory, each finished product undergoes a complete set of electrical and durability tests at a dedicated testing station, with a product defect rate controlled within 0.1%. PUGAO (Plannter) 4P AC miniature circuit breaker is a modular core protection component in three-phase four wire AC distribution systems. Adopting a mature thermal magnetic release mechanism, it achieves dual protection against line overload and short circuit faults, and can mechanically link and synchronously cut off the L1/L2/L3 three-phase phase line and N neutral line.

After the traditional 3-pole circuit breaker trips, the neutral line remains connected, and there is residual voltage in maintenance and dual power switching scenarios, posing a safety threat to operation and maintenance personnel and downstream single-phase+three-phase mixed loads; The PuGao 4P miniature circuit breaker, once manually opened or tripped due to a fault, isolates all four wires simultaneously, completely eliminating this hidden danger.

Mora PLS-60H 4P AC miniature circuit breaker, rated current C63, rated voltage 400V AC, breaking capacity 10kA, compliant with IEC 60898-1.

It is AC type MCB for three-phase four-wire power distribution system. It provides overload and short-circuit protection, no residual current protection. 4-pole linked design. Mounted on standard 35mm DIN rail, widely used in factory, commercial distribution cabinets.

Characteristics and advantages

4-pole synchronous full isolation

Four pole mechanical linkage structure, when tripped or manually turned off, the three-phase phase line and neutral line are synchronously disconnected. Eliminating residual zero line voltage and reverse power transmission risks is a necessary safety configuration for ATS dual power switching, generator backup power supply, and TT grounding system installation scenarios.

B/C/D three types of trip curves, suitable for multiple loads

-Type B: Tripping at 3-5 times rated current, suitable for low impact resistive loads such as three-phase lighting and precision instrument power supply, protecting sensitive equipment and avoiding false tripping.

-C-type: 5-10 times rated current trip, universal solution, suitable for commercial mixed loads, central air conditioning, water pump units, office building distribution branch circuits, and is the most commonly used model for overseas projects.

-D-type: 10-20 times rated current trip, designed for high impact equipment such as three-phase motors, distribution transformers, welding machines, etc., to avoid false tripping caused by large impact currents during equipment startup.

Optional up to 10kA breaking capacity, certified according to IEC/EN60898. Internally optimized arc extinguishing chamber, millisecond level cooling and arc cutting in case of short circuit faults, eliminating the risk of arc ignition. Silver alloy composite contacts have low contact resistance, are not easily eroded after multiple on-off cycles, have a mechanical life of ≥ 10000 cycles, and are stable and reliable for long-term operation.

High performance flame-retardant insulation shell, resistant to cracking and melting in high-temperature environments. Clear on/off indicator window, allowing for intuitive judgment of contact status without the need for disassembly. Anti touch terminal design reduces the risk of electric shock during the wiring process; Tunnel terminal, compatible with both hard and multi strand flexible wires, convenient for on-site wiring.

From the incoming inspection of copper raw materials to the aging testing of finished products, a complete set of traceable quality management covers the entire production chain. The factory has passed ISO9001 quality management system and intellectual property management system certification; Each batch of products will be sampled at the semi-automatic testing station to complete overload, short circuit, and temperature rise inspections. Only after passing the inspection can they be shipped.

Product interpretation:

Mora PLS-60H 4P AC Miniature Circuit Breaker (AC MCB, without leakage)

Basic Parameters

Brand: Mora

Model: PLS-60H

Specification: 4P C63

C63: C-type trip, rated current 63A

Rated AC voltage: 400V~

Rated short-circuit breaking ICN: 10kA

Execution standard: IEC 60898-1

Installation: 35mm standard DIN rail buckle installation

Product Description

AC specific miniature circuit breaker, not suitable for DC circuits, compatible with three-phase four wire AC distribution systems

4-pole linkage integrated handle, with synchronous action of closing/opening four poles, while cutting off L1/L2/L3+N

C-trip curve, capable of withstanding the starting surge current of motors and equipment, and not easily tripped by mistake

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

Applicable scenarios: Three phase four wire distribution box, three-phase power main protection branch in factories, shopping malls, and construction sites

⚠️ Important reminder: for communication only, no leakage protection; If electric shock protection is required, additional leakage accessories are needed.

Practical application cases

The 3P circuit breaker only cuts off the three-phase phase line, while keeping the neutral line connected; For circuits involving neutral wires, especially in dual power supply and frequent maintenance scenarios, 4P circuit breakers are preferred. Typical project cases are as follows:

Case 1:

A shopping center renovation project in Southeast Asia selected a C-curve 4P AC Miniature Circuit Breaker as the sub main switch for each floor's three-phase four wire distribution cabinet. A large number of LED lighting and office electronic equipment in the project will generate severe harmonic currents on the neutral line. Using a 4-pole product, the neutral wire is synchronously disconnected during maintenance. When the operation and maintenance personnel inspect the cabinet, they are no longer threatened by residual voltage induced by the neutral wire, solving the safety hazards that occurred multiple times in old projects using the 3P solution.

Case 2:

A remote factory workshop in Africa is equipped with a municipal power generator automatic conversion device, and a D-curve 4P-40A circuit breaker is installed on the load side of the conversion switch. When switching power supply between the mains and the backup generator, 4-pole full isolation can prevent the two power sources from feeding each other, protect the generator winding from reverse current damage, and ensure the personal safety of on-site operators during equipment maintenance.

Case 3:

Multiple European container mobile workstation projects have selected PUGAO4P AC Miniature Circuit Breaker for three-phase mixed load distribution. Compact guide rail installation suitable for narrow container interior space; Choose B-type release, while protecting precision industrial control instruments and air conditioning loads, to solve the risk of three-phase imbalance caused by the mixing of single-phase and three-phase electrical appliances in mobile power supply systems.

Selection prompt: Pure three-phase zero line load, 3P circuit breaker can be selected; As long as the circuit includes a neutral line, especially for dual power switching, TT grounding systems, and distribution scenarios that require frequent maintenance, 4-pole products are preferred to achieve complete safety isolation.

Why choose Pugao

1. Source physical factory: A 5000 square meter production base in Liushi, Zhejiang, with over 50 employees, including 10% of technical research and development personnel. No middleman markup, providing factory direct supply prices to global B-end customers.

2. We support small batch samples and can also undertake bulk orders for full containers; Automated assembly production line, urgent orders can ensure delivery cycle.

3. PUGAO supports OEM/ODM branding, laser screen printing of brand logos, customization of shell colors, and adjustment of technical parameters. Export specific packaging can be customized according to customer drawings or samples.

4. We have a professional team to assist in handling export documents and compliance audits, and can cooperate with the transportation of goods to designated destination ports. The remote technical team can provide selection advice, installation guidance, and troubleshooting services for overseas customers.

5. In addition to the 4P miniature circuit breakers, PUGAO also supplies low-voltage components such as surge protectors, automatic/manual dual power conversion switches, and leakage protectors for one-stop procurement, reducing communication costs with multiple suppliers.