Is this device suitable for three-phase four-wire systems?

Yes, it is suitable for three-phase four-wire power supply systems with a grounded neutral point.

What standards does the product comply with?

It complies with GB14048.2-2008 and GB/T22387-2008 standards.

Smart MCCB 250A-400A Current Protection Contactor Molded Case Circuit Breaker 3phases 4wires

Name: Smart MCCB 250A-400A Current Protection Contactor Molded Case Circuit Breaker 3phases 4wires
Brand: Zhejiang Leidun Electric Co., Ltd
SKU: 2179865485

Zhejiang, ChinaZhejiang Leidun Electric Co., Ltd

Negotiable

2 Pieces

Product profile

Customization

Available

Breaking Capacity

High Voltage Circuit Breakers

Operation

Manual Automatic

Model NO.

LDM9EL-400

Speed

Normal Type Circuit Breaker

Arc-extinguishing Medium

Air

Installation

Fixed or Withdrawable

Structure

MCCB

Type

Circuit Breaker

Product Name

Residual Current Circuit Breaker

Model

Ldm9EL-400

Trademark

customizable

Origin

China

Key features

Integrated Protection Device: Combines residual current relay, contactor, and MCCB into one unit.

Multi-Function Safety: Protects against grounding faults, overcurrent, short circuits, phase loss, and overvoltage.

Adjustable Protection Curve: Three-stage protection curve is adjustable for graded protection coordination.

High Accuracy Electronic Trip: Electronic overcurrent trip unit less affected by temperature and installation position.

RS485 Communication Interface: Allows parameter setting via programmer and supports communication networking.

Fire and Shock Prevention: Prevents electrical fires and provides indirect contact protection against electric shock.

Compliance with Standards: Meets GB14048.2-2008 and GB/T22387-2008 standards.

Flexible Installation Options: Available in fixed or withdrawable installation structures.

Company profile

High Repeat Buyers ChoiceMulti-language PioneerRaw-Materials TraceabilityFull Customization

Zhejiang Leidun Electric Co., Ltd

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2023-06-09Nearest Port: Ningbo, ShanghaiAverage Response Time: ≤6.61h

AI-Powered supplier vetting

SummaryZhejiang Leidun Electric Co., Ltd. is a China-based manufacturer/factory operating in the electrical and electronics sector. The supplier demonstrates broad customization, 3D software design, R&D, ODM, and OEM capabilities, including new product development and technical support. It reports valid manufacturing contracts, in-stock capacity, documented supplier-service procedures, and lead times within 15 working days in both peak and off-season periods. It holds CCC, CQC, and three system certifications according to its company description. However, it has no available SDK, overseas warehouse, overseas agents or branches, overseas showroom, or offline trade-show participation. Finished-product inspection is guided by instructions but lacks written records. Financial information is limited to year labels without performance figures, so financial credibility cannot be fully assessed. Customer approval and positive feedback are reported, but no specific customer names or case details are provided.

Supplier typeThe supplier is identified as Zhejiang Leidun Electric Co., Ltd., a limited company and manufacturer/factory based in Zhejiang, China, operating in electrical and electronics. This directly establishes its legal form, location, and business type.

CertificationsThe company states that it has obtained CCC and CQC certifications, as well as three system certifications and multiple honorary awards. These stated certifications support a positive assessment, although the specific system certifications are not identified.

After-Sales capabilityR&D responsibilities explicitly include technical support for after-sales service, sample proofing, and testing. The supplier also reports written procedures and followed records for assessing effective supplier service capability, but the slices do not describe response coverage, warranty terms, or dedicated after-sales infrastructure.

R&D capabilityThe supplier reports professional technical R&D capability, new product development during the past year, ODM services, and R&D engineers responsible for process development, technical improvements, product optimization, and technical problem handling. However, it has no available SDK, which limits evidence of software-development extensibility.

Production capacityThe supplier reports valid manufacturing contracts with each associated subcontractor, in-stock capacity, 300 qualified suppliers for service capability, and average lead times within 15 working days in both peak and off-season. Its finished-product inspection method has instructions but no written records, indicating a documented-process weakness in quality inspection evidence.

Customization capabilityThe supplier supports customization from samples, designs, full customization, minor customization, and flexible customization, and also provides 3D software design, ODM, and OEM services for well-known brands. These capabilities directly support a strong customization assessment.

Client casesThe company states that market sales data confirm its products meet customer needs and project requirements, with customer approval and positive feedback, and it reports OEM service for well-known brands. No named customers, project descriptions, or independently detailed case evidence are provided.

Product Q&A

Q:What protection functions does this device offer?

It provides protection against grounding faults, overcurrent, short circuits, phase loss, and overvoltage.

Q:Is the protection curve adjustable?

Yes, the three-stage protection curve is adjustable to work with lower-level circuit breakers.

Q:Can the rated current be adjusted?

Yes, the electronic overcurrent release allows adjustment according to circuit load conditions.

Q:Does it support communication networking?

Yes, it is equipped with an RS485 serial interface for parameter setting and networking.

Q:What is the maximum installation altitude?

The altitude should not exceed 2000 meters; otherwise, derating operation is required.

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Smart MCCB 250A-400A Current Protection Contactor Molded Case Circuit Breaker 3phases 4wires