What is the difference between a molded case residual current circuit breaker and an ordinary circuit breaker?

Besides overcurrent protection, the molded case residual current circuit breaker adds leakage protection. It detects leakage current and cuts off the circuit when it reaches a set value, preventing electric shock. It is suitable for places with high safety requirements like homes, hospitals, and schools.

Advanced Molded Case Residual Current Circuit Breakers for Electrical Safety

Name: Advanced Molded Case Residual Current Circuit Breakers for Electrical Safety
Brand: Shandong Kaichuan Electric Power Equipment Co., LTD
SKU: 1986563771

Shandong, ChinaShandong Kaichuan Electric Power Equipment Co., LTD

US$46.95-193.50

1 tower

Product specifications

Size

Sample price:US$21.20/tower.Request sample

Product profile

Customization

Available

Breaking Capacity

Low Voltage Circuit Breakers

Operation

Energy-storage Type

Model NO.

100A

Speed

High-Speed Circuit Breaker

Arc-extinguishing Medium

Air

Installation

Fixed

Structure

MCCB

Poles Number

Type

Circuit Breaker

Function

Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection), RCCB

Certification

VDE, ISO9001-2000, CE, CB, CCC

Transport Package

Wooden Packaging

Specification

300mm*400mm*200mm

Trademark

SDKC

Origin

China

Key features

Multi-Function Protection: Provides circuit-breaker failure, overcurrent, overvoltage, and leakage protection.

High-Speed Operation: Features energy-storage type operation for high-speed circuit breaking performance.

Comprehensive Certifications: Certified by VDE, ISO9001-2000, CE, CB, and CCC for global compliance.

Customization Support: Supports OEM/ODM services, including customization from samples, designs, and flexible options.

Fixed Installation Structure: Designed as a fixed MCCB with 4 poles for stable low-voltage circuit protection.

Efficient Delivery: Delivery within 12 days after deposit, supported by an efficient production process.

Quality Assurance: 100% finished product inspection with full traceability of raw materials.

Air Arc Extinguishing: Utilizes air as the arc-extinguishing medium for reliable and safe operation.

Company profile

Shandong Kaichuan Electric Power Equipment Co., LTD

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 year CertifiedNearest Port: Qingdao PortAverage Response Time: ≤3.58h

AI-Powered supplier vetting

SummarySDKC Shandong Kaichuan Electric Equipment Co., Ltd. is described as a high-tech enterprise integrating R&D, manufacturing, trade, and service, with products including electrical control cabinets, motors, frequency converters, electrical components, and high- and low-voltage switchgear. It reports broad customization and ODM capabilities, new products within the past year, and OEM service for well-known brands. Its finished-product inspection instructions are reportedly uniformly followed, while service procedures exist for supplier assessment, corrective actions, and complaints; however, written records are absent for the latter two mechanisms. The supplier reports no overseas warehouse, showroom, agent or branch, or offline trade-show participation, and lists zero overseas service countries. Financial credibility cannot be confirmed because the provided financial fields report zero operating revenue, costs, profits, margins, and ratios for the stated periods, without enough context to validate the...

Supplier typeThe supplier is described as a high-tech enterprise integrating R&D, manufacturing, trade, and service. Its stated business scope centers on producing, processing, and selling electrical control cabinets, motors, frequency converters, switchgear bodies, transformers, and related electrical equipment.

After-Sales capabilityThe supplier has written procedures and records for assessing effective service capability, and reports lead times within 15 workdays in both peak and off-season periods. However, corrective and preventive action and customer-complaint procedures have no written records, while overseas service coverage is limited: zero countries and no overseas warehouse, showroom, agent, or branch.

Financial creditThe supplier reports registered capital and describes itself as a large-scale enterprise, but the financial-capacity slices report zero operating revenue, costs, profits, margins, and current ratios for the stated periods. These figures provide no positive evidence of financial strength and raise a material credibility concern, although the supplied data does not explain whether the zeros reflect actual results or incomplete reporting.

R&D capabilityThe supplier reports R&D capability, at least one new product during the past year, and ODM services. Its company description also identifies R&D as part of its integrated operation, but no usable SDK is available.

Production capacityThe supplier states that it operates manufacturing facilities and equipment including copper-bar processing machinery and an assembly line. Its described production scope covers electrical control cabinets, motors, frequency converters, switchgear, transformers, and related equipment, while finished-product inspection instructions are reportedly available and uniformly followed.

Customization capabilityBoth relevant slices explicitly list customization from samples, designs, full customization, minor customization, and flexible customization. The supplier also reports ODM availability, supporting broad product-development and customization coverage.

Product Q&A

Q:What is the difference between the 4P and 3P molded case residual current circuit breaker?

The 4P breaker connects to a three-phase four-wire system (L1/L2/L3/N), controlling both live wires and the neutral wire, which helps avoid safety hazards from abnormal neutral current. The 3P breaker connects to a three-phase three-wire system (L1/L2/L3) and only controls the three live wires, leaving the neutral wire always connected.

Q:How to install and wire the Molded Case Residual Current Circuit Breaker 4P?

Connect the incoming end to the three-phase live wires and neutral wire, and the outgoing end to the load side lines. Ensure firm installation, correct wiring according to specifications, and distinguish terminals to avoid hazards. For draw-out types, install on the draw-out base per instructions.

Q:How to test whether the leakage protection function is normal?

Use a dedicated leakage testing instrument to simulate a fault and observe if the breaker trips within the specified time. Alternatively, press the test button regularly for manual checks. If it fails to trip, it needs repair or replacement.

Q:What is the function of the residual current circuit breaker?

It detects leakage (current leakage) in the circuit and quickly cuts off power to prevent electric shock or electrical fires. It also provides overload and short-circuit protection.

Q:What is the delivery time?

Delivery is usually completed within 12 days after receiving the deposit, depending on order quantity. The efficient production process ensures timely delivery of high-quality products.