Ultra Compact Intelligent Circuit Breaker CBRM5E from China Suppliers and Factory - Fast Auto-Reclosing, Smart Grid Ready

Main functions and features Product model and meaning

Main functions and features

Operating environment

Classification and functions of circuit breakers

Main technical parameters

Measurement accuracy class

Note: The temperature detection point is located near the incoming and outgoing wiring terminals.

Protection characteristics description

Overload long delay protection

The circuit breaker should provide overload and short-circuit protection, photovoltaic power generation system islanding protection and power quality monitoring protection. The setting values of all protection functions should support remote configuration.

1. Range of overcurrent long delay setting value (Ir)
Range of current setting value (Ir): 0.4~1In, OFF. OFF means it can be turned off, that is, turning off the protection function. The delay action characteristic is the IEC standard inverse time limit curve, Kfactor=0.14, αfactor=0.02, Lfactor=0, I=set current, Is=rated current:

Tms setting range: 1-10s.

The overcurrent long delay protection action should meet the requirements in Table 1.

Comparison Table of Overcurrent Long Delay Protection Actions (Table 1)

Note: 1.3Ir is a conservative value, and the time and current values are set in the switch body.

Action characteristics

1. Range of overcurrent short delay setting value (Isd)
Range of short-time action current (Isd): 1.5~5Ir, OFF. OFF means it can be turned off, that is, turning off the protection function. The delay action characteristic is a fixed time limit, and the setting range of tlsd is 1-10s. The overcurrent short delay protection action should meet the requirements in Table 2.

Comparison Table of Overcurrent Short Delay Protection Action (Table 2)

Note: k1, k2=1.5~5Ir, k1<k2; the time and current values are set in the switch body.

2. Range of rated short-time breaking current setting value (Ii).
Range of rated instantaneous short-circuit current setting value (Ii): 2~12Ir, OFF. OFF means it can be turned off, that is, turning off the protection function. The breaking current protection action should meet the requirements in Table 3.

Comparison Table of Short-circuit Current Protection Action (Table 3)

3. The protection characteristic curve of three-section protection is shown in the following figure:

Overvoltage protection
Range of overvoltage protection voltage setting value (Uov) is 1.05~1.5Un. OFF means it can be turned off, that is, turning off the protection function. The delay action characteristic is a fixed time limit, and the setting range of tUov is 1-9999s. The overvoltage protection action should meet the requirements in Table 5.

Comparison Table of Overvoltage Protection Action (Table 5)

Undervoltage protection
The molded case circuit breakers do not have such function. Range of undervoltage protection voltage setting value (Uuv) is 0.4~0.95Un. OFF means it can be turned off, that is, turning off the protection function. The delay action characteristic is a fixed time limit, and the setting range of tUuv is 1-9,999s. The undervoltage protection action should meet the requirements in Table 6.

Comparison Table of Undervoltage Protection Action (Table 6)

Terminal and contact overtemperature protection
Range of terminal and contact overtemperature protection setting value (Tem): 80~160℃, OFF. OFF means it can be turned off, that is, turning off the protection function. The delay action characteristic is a fixed time limit, and tTem setting range is 1-9,999s. The terminal and contact overtemperature protection action should meet the requirements in Table 7.

Comparison Table of Terminal and Contact Overtemperature Protection Action (Table 7)

Passive islanding protection
The passive inspection method mainly detects whether the system is in an islanding state by detecting the amplitude, frequency, phase position, and harmonic content of the common point voltage at the output terminal of the inverter, mainly including overvoltage/undervoltage protection, overfrequency/underfrequency protection, phase change detection, harmonic detection, etc. The setting values of passive islanding detection criteria;
Voltage amplitude swing (dUisl): 0.1~0.9Un, OFF; voltage frequency swing (dFisl): 0.5~25Hz, OFF;
Voltage phase swing (dPHisl): 1~60°, OFF; voltage waveform distortion swing (dUTHDisl): 0.5~30%, OFF;
The delay action characteristic is a fixed time limit, and tPis setting range is 0.01-9.99s;
The passive islanding protection action should meet the requirements in Table 8.

Comparison Table of Passive Islanding Protection Action (Table 8)

Power generation quality monitoring and protection
The monitoring and protection actions of power generation current harmonics should meet the requirements in Table 9.

Comparison Table of Current Harmonics and Protection Action (Table 9)

Monitoring and protection of power generation current three-phase imbalance (applicable to three-phase grid connection)
The three-phase imbalance protection action of power generation current should meet the requirements in Table 10.

Negative sequence three-phase current imbalance ratio and protection action (Table 10)

Undervoltage protection function
When the phase voltage of the line is lower than the undervoltage protection set value, the circuit breaker will trip for protection. After the line voltage returns to normal, the circuit breaker can be automatically closed and activated. The range of undervoltage protection setting value is 88V~209V, the factory setting is 187V, and users can set or turn off the protection themselves.

Open phase protection function
When the phase of the outgoing line of the power end of the line is open, the circuit breaker will trip for protection. After the line voltage returns to normal, the circuit breaker can be automatically closed and activated. The range of open phase protection set value is 10V~130V, the factory setting is 30V, and users can set or turn off the protection themselves.

Automatic reclosing
When the line voltage value exceeds the limit and the circuit breaker trips, the circuit breaker will be automatically reclosed 5s later after the line voltage returns to normal, but manual closing is not limited by time.

External control or dynamic protection function

Note: S1 is passive dry node; When the product is put into use and there is no external control, S1 needs to be shorted or the external control function of the software needs to be turned off.

Cost control function
This product can be connected to a cost control meter and be used as an external circuit breaker for an energy meter. It is compatible with pulse type and level type cost control meters. This function requires configuring the switch to cost control mode and turning it on, and only when the cost control is enabled, can it be used. When it is working in cost control mode, the dynamic protection function can automatically exit, and when there is no energy meter cost control signal, it cannot be manually or automatically closed. If it is closed by force, the product will be automatically disconnected.

Overall and installation dimensions - 3P

Overall and installation dimensions - 4P