CBRM3EL MCCB: China Suppliers Factory Automatic Reclosing Circuit Breaker with Residual Current Protection

The product meets the following standards:

• GB/T14048.1-2012 Low voltage switchgear and control equipment Part 1: General principles;
• GB/T14048.2-2008 Low-voltage switchgear and control equipment Part 2: Circuit breakers;
• GB/T17701-2008 <Equipment circuit breakers>.

• Adopt high-performance 32-bit ARM microprocessor, real-time signal processing and intelligent control;
• LCD Chinese display, user-friendly interface, easy operation;
• The residual current (leakage current) protection can be adjusted online, and has the function of reclosing;
• Real-time monitoring and tracking of the residual current of the line, automatic adjustment of the range, to ensure the operation rate and reliability of the product;
• Three-stage protection, long delay, short delay and instantaneous, using electronic trip, independent of power supply voltage;
• High breaking capacity to ensure the reliability of line short circuit protection;
• Over-voltage protection, under-voltage protection, phase loss protection;
• The residual current of the line, the three-phase power supply voltage and the load current are displayed in real time;
• Protective functions and parameters can be set and modified online.
• Trip types (residual current, lockout, overload, under-voltage, over-voltage, phase loss) are identified and displayed, and can be stored, queried, and deleted.
• The network type has communication functions, which can realize remote signaling, remote measurement, remote control and remote adjustment.
• Plug-and-play lightning protection module (optional)
• Supports infrared communication (optional)

Action value range
Table 1: Overload Long Delay Parameter Settings

Table 2: Protection Action Characteristics

The overload protection is based on the inverse time characteristic.
The delay time T is calculated as (6rll, with a tolerance of ±10%. Here, T represents the action time, Irl is the long delay protection setting, I denotes the fault current, and tL is the long delay time setting.

Short delay protection prevents impedance short circuit in the distribution system, and the trip delay is to achieve selective protection.
Short-circuit short delay protection parameter settings
Table 3: Short-circuit delay parameter setting

Short-circuit short delay protection action characteristics
Table 4: Short Delay Action Characteristics of Short Circuit

Set parameters for instantaneous short-circuit protection
Table 5: Instantaneous parameter setting

Short-circuit instantaneous protection action characteristics
Table 6: Instantaneous motion characteristics

Setting range for residual current protection characteristics

Note: The left side of the attachment in the diagram is the auxiliary contact, and the right side is the lightning protection module. All models have the same attachment dimensions.