Your Professional Residual Current Circuit Breaker Supplier！
Founded in 2010, Zhejiang Westroom Electric Co., Ltd. has a registered capital of 10 million RMB and is a professional enterprise integrating the design, manufacturing, sales, and service of plastic-cased circuit breakers, residual current circuit breakers, miniature circuit breakers, and other related products.The company primarily produces plastic-cased circuit breakers, residual current circuit breakers, miniature circuit breakers, and other related products.
Why Choose Us
Stable Quality
Equipped with advanced production and testing facilities, Westroom Electric implements strict quality control throughout the manufacturing process. This helps ensure reliable product performance, consistent quality, and stable supply for long-term projects.
Our Service
Westroom Electric is focuses on providing responsive pre-sales, in-sales, and after-sales support to ensure customer satisfaction throughout the cooperation process.
Sales Market
The company supplies products to power transmission and distribution engineering companies, agents, and project contractors in Europe, the United States, Japan, the Middle East, Russia, and Southeast Asia, as well as the domestic market.
Overview: Residual Current Circuit Breaker
A Residual Current Circuit Breaker (RCCB)—also called RCD or GFCI—is a device that protects people from fatal electric shock. Unlike MCBs, which guard against overloads and short circuits, RCCBs detect tiny current leaks that may flow through the human body.
Product Specification
We offers the following product specifications：
|
Item |
Specification |
|
Rated Current |
25A, 40A, 63A, 80A, 100A |
|
Number of Poles |
1P (+N), 2P, 3P (+N), 4P |
|
Rated Voltage |
230/400VAC |
|
Rated Insulation Voltage |
500V |
|
Rated Frequency |
50/60Hz |
|
Short-Time Withstand Current (Icw) |
12Ie, 1s |
|
Making & Breaking Capacity |
3Ie, 1.05Ue |
|
Rated Short-Circuit Making Capacity |
20Ie, t = 0.1s |
|
Rated Impulse Withstand Voltage |
6000V |
|
Mechanical Life |
8,000 cycles |
Easy to install - Terminals equipped with fail-safe features to avoid improper installation. A double slot for connection with cables and PS busbars. Possible to connect two independent cables in the same device.
Contact position indicator (CPI) - To always know the status of the contacts independently on the toggle position. Red: closed contacts, green: open contacts.
Test pushbutton - To verify the correct functioning of the device.
Integration - Compatible with System pro M Compact accessories.
Marking on the device - All the safety ensured by the international marks: approvals' marking in a visible area, even if RCDs are installed and with the panel-door closed.
Common types
AC
Detects and trips on alternating sinusoidal residual currents.
01
A
Detects both alternating and pulsating direct residual currents.
02
B
Suitable for detecting smooth direct residual currents, often used in industrial applications.
03
F
Designed for applications where both AC and DC residual currents are present, such as in variable speed drives.
04
H
Offers increased sensitivity for enhanced protection in critical environments.
05
Precautions
Routine Testing
Test the residual current circuit breaker regularly using the built-in test button. This helps ensure the device is functioning properly. It's recommended to test it every 3 months.
Visual Inspection
Periodically inspect the RCCB for signs of wear, such as damage to the device or signs of overheating.
Replacement
If the RCD switch fails to trip during testing or shows signs of damage, it should be replaced immediately by a qualified professional.
Components
Phase wire (A): The phase wire is the live wire, or hot wire, that sends current from the power supply to the circuit.
Breaker contacts (B): The breaker contacts are closed or open to control whether current can pass through the RCCB or not, respectively.
Neutral wire (C): The neutral wire sends current back to the power source.
Test button (D): The test button lets users quickly test whether the circuit breaker is functioning correctly. Pushing the button stops the flow of electricity through the breaker.
Current limiting resistor (E): When the test button is pressed, current flows directly through the neutral wire from the phase wire. The resistor prevents the current from getting too high.
Sensing coil (F): The sensing coil wraps around the core and determines whether there is a balance or imbalance between the phase and the neutral.
Core (G): The core is made of ferrous material. Some core designs have a plastic cover for insulation and protection. Currents from the phase and neutral wires create opposing magnetic fields. The sensing coil monitors whether there is a difference between the two latter currents.
Relay (H): When there is an imbalance between the phase and neutral, the relay causes the breaker contacts to open.
Application
Residential Installations
Homes remain the most common application of RCCB. Kitchens, bathrooms, and outdoor sockets are especially vulnerable. The device cuts the supply instantly, reducing shock risk.
Industrial Safety Systems
Factories deal with high-powered motors and long cable networks. Here, the application of RCCB becomes critical for worker safety. Installing multiple RCCBs across distribution boards helps isolate faults quickly.
Construction and Temporary Sites
In such situations, an RCCB circuit breaker acts as a frontline protector. Portable RCCB units are often attached to extension boards to prevent fatal shocks. It's a small investment compared to the massive safety benefits it delivers.
Commercial Buildings
Shopping malls, offices, and hotels rely on uninterrupted power. Yet safety cannot be compromised.Strategic RCCB placement allows fault isolation without triggering widespread inconvenience.
Other Services
Advanced Arc-Extinguishing Technology
Features an optimized arc chute design that rapidly interrupts fault currents in milliseconds, minimizing thermal and mechanical stress on downstream equipment.
Versatile Trip Unit Options
Available with high-precision electronic or reliable thermal-magnetic trip units. Adjustable current settings allow for precise matching to specific load profiles.
High Breaking Capacity, Compact Footprint
Delivers exceptional short-circuit breaking capacity (Icu/Ics) within a compact frame. This space-saving design optimizes panel layout and reduces overall enclosure costs.
Field-Installable Modular Accessories
Easily accommodates snap-on accessories—including shunt trips, undervoltage releases (UVR), auxiliary contacts, and alarm switches—to support complex control logic and remote monitoring.
Certifications
Package & Delivery
Package: Standard export package or Custom
Delivery: By air express, by sea
FAQ
As one of the leading residual current circuit breaker manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to wholesale advanced residual current circuit breaker at competitive price from our factory.
Current Operated Circuit Breaker, Residual Current Breaker with Overcurrent Protection, Residual Circuit Breaker with Overload