Delixi CDM3-63 C32 2P CDM3 series Moulded Case Circuit Breaker

Let's take a closer look at the Delixi CDM3-63 C32 2P miniature circuit breaker.

This medium-capacity, bipolar circuit breaker plays a crucial role in power distribution systems. With its high current-carrying capacity and comprehensive protection features, it's often used for circuit control or protecting high-power loads.

I. Overall Product Positioning

This bipolar miniature circuit breaker belongs to Delixi's classic CDM3 series. While it lacks leakage protection, its core value lies in providing a higher level of overload and short-circuit protection for a complete circuit (live and neutral).

II. Model Details

Each part of the model number CDM3-63 C32 2P identifies its key features:

1. Series: CDM3

This designation indicates that it belongs to Delixi's CDM3 series. This series is recognized in the market for its cost-effective, economical, and practical products, with stable quality, and is widely used in various mid- and low-end power distribution projects.

2. Frame Rating: -63

This refers to the maximum current rating of the "frame" or "frame" to which the circuit breaker belongs, which is 63A. This C32 circuit breaker is manufactured for this 63A frame.

3. Tripping Curve and Rated Current: C32

C: Tripping Characteristic Curve. The C curve is the most common type, with an instantaneous tripping current range of 5 to 10 times the rated current (i.e., 32A * 5 - 10 = 160A - 320A). It is suitable for most common distribution loads, such as lighting, sockets, and household appliances, and can withstand typical power-on/off inrush currents.

32: Rated operating current, measured in amperes. This is one of the circuit breaker's most critical parameters, indicating its ability to safely carry a current of 32A for extended periods. If the current in the circuit exceeds 32A continuously, the circuit breaker will activate overload protection, resulting in a delayed trip.

4. Number of Poles: 2P

2P stands for bipolar. It controls and protects both the live (L) and neutral (N) wires simultaneously.

When disconnected, it achieves complete electrical isolation of the circuit, providing greater safety than a 1P circuit breaker that only disconnects the live wire.

Physically, it typically occupies the width of two modules (36mm) on the distribution rail.

III. Core Protection Functions

Overload Protection: When the current exceeds 32A for a prolonged period (for example, reaching 40A or more for a sustained period), the internal bimetallic strip will bend due to thermal effects, triggering a tripping mechanism to protect downstream wiring and equipment from overheating damage.

Short-Circuit Protection: When a short-circuit fault occurs in a line, generating abnormally high current (typically hundreds to thousands of amperes), the internal electromagnetic release will instantly activate, immediately shutting off power and preventing further damage.

IV. Typical Application Scenarios

With its large 32A capacity, the CDM3-63 C32 2P circuit breaker is commonly used in the following applications:

Main entrance switches in small and medium-sized shops and offices: Serving as the master circuit breaker for controlling and protecting the entire space.

A main switch in a residential distribution box: This is especially important in homes with high power loads.

A dedicated circuit for high-power appliances: This protects independent circuits for devices such as instant electric water heaters, large cabinet air conditioners, and high-power electric ovens.

A main switch for a branch circuit: This controls all outlets in a kitchen, or all outlets and lighting in a room, for example.

Single-phase protection for small three-phase devices.