1. The difference

1) Different properties: ELCB is a leakage circuit breaker; Both RCCB and RCBO are residual current operating circuit breakers, but RCBO has overcurrent protection.

2) The working principle is different: ELCB is when the human body touches the line end of the power supply, namely the live line, or the electric equipment is leaking, the current does not flow through the neutral line, resulting in unequal current. The leakage protector immediately trips to protect the safety of the human body and electrical equipment after detecting the difference in the current; RCCB and RCBO are mainly used to detect the residual current and disconnect the main circuit contacts when the residual current value exceeds the reference value.

3) The application environment is different: ELCB is suitable for low-voltage power grid with ungrounded transformer neutral point and low-voltage distribution system with grounded transformer neutral point; RCCB and RCBO are suitable for AC 50Hz or 60Hz, rated voltage single-pole two-wire, 230V poles, three-stage/three-stage four-wire, four-stage 400V, rated current up to 60A, RCBO is mainly suitable for applications requiring both overcurrent protection (overload and short circuit) and ground fault current protection functions.

2. Explanation of noun:

RCCB, ELCB, RCBO and RCD are English abbreviations.

RCCB: Residual current circuit breaker. RCCB: Residual current circuit breaker

ELCB: Earth leakage circuit breaker. Elcb: Earth leakage circuit breaker

RCD: Residual current device The circuit breaker is operated

RCBO: Residual Current Circuit Breaker with Overcurrent Protection. Rcbo: Residual current circuit breaker with overcurrent protection

3. According to ABB's sample, the difference between RCCB and RCBO is that the former does not carry overcurrent protection, while the latter does. RCD should contain both RCCB and RCBO. ELCB is used for ground leakage current protection, which is different from residual current.

1) RCCB is the name of ABB HAGER, while RCBO is the name of Merlin Gerin. It's basically the same kind

2) The most obvious difference between RCBO and MCB is that there are two more wires (one for each N/E).

Therefore, the common name FUSE refers to both leakage and overcurrent protection

This includes the ELCB(the name used by Mitsubishi) because at 80' When the leakage protector appeared in s's

The name is registered

At that time ABB's ACCB majority did not have overcurrent protection

There's another one called RCD

3) Currently called RCBO, only MG

So it's a trigger

4) Hager now produces mouse tail names with RCCB

RCCB Electromagnetic leakage Circuit breaker RCCB Residual current action circuit breaker (RCCB) without overcurrent protection complies with CB16916.1

IEC1008

BS4293 and other standards are applicable to industrial and mining enterprises

Business and home communication 50~60HZ

Single-phase 230(220V)

Three-phase 400V(380V)

As the protection of personal shock and equipment leakage, it can also be used as the infrequent conversion of the line under normal circumstances. Ambient air temperature: ambient air temperature -5℃ ~ 40℃. The 24-hour average does not exceed 35℃. Elevation: The elevation of the installation site shall not exceed 2000 meters. Large gas strip: The relative temperature of the air at the installation site shall not exceed 50% when the maximum temperature is 40℃, and the relative temperature shall not exceed 90℃ when the average lowest temperature of the wettest month is not more than 25℃. Installation category: x Installation category is II, III. Installation pollution level: Pollution level II. Installation type: standard guide rail installation. Installation conditions: The external magnetic field in any direction of the installation site should not exceed 5 times that of the earth magnetic field. Generally, the RCCBx should be installed vertically with the handle upwards as the power supply position. There should be no significant impact or vibration at the installation site. Connection mode: screw pressing connection or use the busbar connection. Structure: The circuit breaker with residual current is mainly composed of zero X current transformer, trip device, operating mechanism, Angle head system, arc extinguishing device, insulating shell, etc.

Working principle:

The circuit works normally and the circuit breaker with the remaining current is in the closed position. In case of civil or electric shock failure on the line, the output signal of the zero-x current transformer will push the discharger to act and cut off the power supply within 0.1 seconds, thus realizing the function of leakage protection. RCBO Leakage Circuit breaker with overcurrent protection Characteristics of the leakage circuit breaker with overcurrent protection (RCBO) : The RCBO meets the EN61009 standard. It is mainly used in power distribution lines and electrical equipment with AC 230/400V or lower and rated working current of 16A to 40A, when the leakage current between the phase and the ground is greater than or equal to 1△. The trip automatically disconnects the circuit without any auxiliary power supply. RCBO leakage circuit breaker with overcurrent protection。