CBRM5E Ultra Compact Intelligent MCCB from China Suppliers - Fast Auto-Reclosing & Smart Grid Solutions Factory

Main functions and features Product model and meaning

Main functions and features

• Adopt high-performance 32-bit ARM microprocessor for real-time signal processing and intelligent control;
• LCD display in Chinese/English, user-friendly interface, easy to operate;
• Have automatic reclosing function; high closing speed, closing time ≤ 2s;
• Long delay, short delay, and instantaneous three-section protection, adopting electronic tripping, independent of power supply voltage;
• Have high breaking capacity, ensuring reliability of short circuit protection;
• Overvoltage protection, undervoltage protection, open phase protection, and null line loss protection; the protection functions and parameters can be set and modified online;
• Real-time display of three-phase power supply voltage and load current;
• Identification, display, storage, query, and deletion of tripping types (remote blocking, overload, undervoltage, overvoltage, voltage loss, open phase, disconnection of null lines, etc.);
• Support the functions of remote signaling, telemetering, remote control, and remote adjustment;
• HPLC pluggable module and micro-power Bluetooth wireless communication;
• 0.05In-1.2In measurement can reach Grade 1.0;
• Real-time measurement of active power, reactive power, apparent power, power factor and other parameters, and accumulation of three-phase active electrical energy;
• Time control, cost control and other modes are optional, making the application more flexible;
• Support DL/T645 protocol and Modbus protocol, and automatically identify them;
• Real-time monitoring of the temperature of the incoming terminal block (optional);
• Support online remote upgrade for easy maintenance and upgrade;
• Accuracy class: The current and voltage accuracy can reach up to Class 0.5s; the accuracy of active and reactive power can reach up to Class 1;
• Support active power demand exceeding the limit, reactive power demand exceeding the limit, current abrupt change event, current interruption, voltage harmonic content, current harmonic content, voltage waveform distortion, and current waveform distortion;
• Have passive islanding protection (optional);
• Have terminal and contact overtemperature protection (optional);
• Have power generation quality monitoring and protection (optional);
• Have three-phase unbalanced monitoring and protection for power generation current (optional).

Operating environment

• The installation site should be free of conductive dust, corrosive gases, flammable and explosive gases, and invasion of rain or snow;
• Altitude: Not exceeding 2,000m;
• Ambient temperature: -5℃~+40℃, mean daily maximum temperature: ≤ +35℃;
• Relative humidity: ≤ 50% (when the ambient temperature is +40℃);
• The magnetic field strength of the external magnetic field of the installation site should not exceed 5 times the strength of the geomagnetic field in any direction;
• The installation location should have good ventilation and heat dissipation conditions;
• When HPLC (broadband carrier) communication is required, make sure that all communication devices work under one transformer.

Classification and functions of circuit breakers

● means this function is available; △ means this function is optional; ○ means this function is not available;

Main technical parameters

Measurement accuracy class

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

◆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 (dUisI): 0.1~0.9Un, OFF; voltage frequency swing (dFisI): 0.5~25Hz, OFF;
Voltage phase swing (dPHisl): 1~60°, OFF; voltage waveform distortion swing (dUTHDisI): 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.

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.

Note: 1.3lr 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): 1.5~5lr, 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.

Note: k1, k2=1.5~5lr, 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 (I): 2~12lr, 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

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

Note: OFF means it can be turned off, that is, turning off the protection function.

◆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

◆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

◆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 (dUisI): 0.1~0.9Un, OFF; voltage frequency swing (dFisI): 0.5~25Hz, OFF;
Voltage phase swing (dPHisl): 1~60°, OFF; voltage waveform distortion swing (dUTHDisI): 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

◆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

Note: OFF means it can be turned off, that is, turning off the protection function.

◆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

◆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