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China CBRM5EN Primary-Secondary Separated MCCB Circuit Breaker - 1000V Insulation Voltage, 630A Current, Suppliers & Factory
Product Model and Meaning
Scope of Application
The smart IoT circuit breaker features a rated insulation voltage of 1000V, designed for three-phase four-wire power distribution systems; Operating at 50Hz AC with a rated voltage of 400V and rated current up to 630A. It provides indirect contact protection, prevents fire hazards caused by ground fault currents from equipment insulation damage, and distributes electrical energy while protecting circuits against overloads and short circuits. Additionally, it offers protection against line overvoltage, undervoltage, and phase loss.
GB/T14048.2 "Low-voltage switchgear and control equipment".
GB/T22710 Electronic Controller for Low Voltage Circuit Breakers.
Main Features and Characteristics
- It employs a high-performance 32-bit ARM microprocessor for real-time signal processing and intelligent control.
- LCD display in Chinese/English, user-friendly interface, easy operation.
- Features automatic reclosing; fast closing speed, with a closing time of ≤2s.
- 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.
- Overvoltage protection, undervoltage protection, phase loss protection, zero loss protection, protection functions and parameters can be set and modified online.
- Real-time display of three-phase power supply voltage and load current.
- Identify and display trip types (remote lockout, overload, undervoltage, overvoltage, phase loss, zero-segment break, etc.), and store, query, and delete them.
- Supports four remote functions: remote signaling, telemetry, remote control, and remote adjustment.
- HPLC plug-and-play module with Bluetooth wireless communication for low-power operation.
- 0.05In-1.2In measurement accuracy up to 1.0 grade.
- Parameters such as active power, reactive power, apparent power and power factor are measured in real time, and three-phase active power is accumulated.
- Time control, cost control and other modes are optional, and the application is more flexible.
- Supports DL/T645 and Modbus protocols with automatic recognition.
- Real-time temperature monitoring of incoming line terminal strips (optional).
- Supports online remote upgrades for easy maintenance and updates.
- Accuracy class: Current and voltage accuracy up to 0.5s class; active and reactive power accuracy up to 1 class.
- Supports active power demand limit, reactive power demand limit, current mutation event, current interruption, voltage harmonic content, current harmonic content, voltage waveform distortion, current waveform distortion.
- Passive island protection (optional).
- Terminal and contact over temperature protection (optional).
- Power generation quality monitoring and protection (optional).
- Three-phase unbalanced monitoring and protection of power generation current (optional).
Service Environment
- The installation site should be free of conductive dust, corrosive gas, flammable and explosive gas, and rain and snow invasion.
- Altitude: not higher than 2000m.
- Ambient temperature: -5℃~+40℃, daily average maximum temperature: ≤+35℃.
- Relative humidity: ≤50% (at ambient temperature of +40℃).
- The strength of the external magnetic field in any direction at the installation site is not more than 5 times that of the geomagnetic field.
- The installation position should have good ventilation and heat dissipation.
- When HPLC (wide band carrier) communication is required, ensure all communication devices operate under a single transformer.
Circuit Breaker Classification
| Functional classification | Conventional type | Quantitative | Photovoltaic | |
|---|---|---|---|---|
| Defensive function | Overload protection | ● | ● | ● |
| Short-circuit protection | ● | ● | ● | |
| Autoreclose circuit breaker | ● | ● | ● | |
| Phase loss protection | ● | ● | ● | |
| Overvoltage crowbar | ● | ● | ● | |
| Undervoltage protection | ● | ● | ● | |
| Zero-loss protection | ● | ● | ● | |
| Over/under frequency protection | ● | ● | ● | |
| Power-off protection | ● | ● | ● | |
| Phase Sequence Protection | ● | ● | ● | |
| Island Protection | ○ | ○ | ● | |
| Over temperature Protection | △ | △ | ● | |
| Power quality monitoring and protection | ○ | △ | ● | |
| Measurements | Three-phase working voltage | ● | ● | ● |
| Three-phase working current | ● | ● | ● | |
| Active power | ○ | ● | ● | |
| Reactive power | ○ | ● | ● | |
| Apparent output | ○ | ● | ● | |
| Voltage imbalance | ○ | ● | ● | |
| Unbalanced current | ○ | ● | ● | |
| Performance Settings | Long delay due to overload | ● | ● | ● |
| Short circuit delay | ● | ● | ● | |
| Instantaneous short circuit | ● | ● | ● | |
| Overvoltage protection value | ● | ● | ● | |
| Undervoltage protection value | ● | ● | ● | |
| Time, date | ● | ● | ● | |
| Protect investment and exit | ● | ● | ● | |
| Phase loss protection value | ● | ● | ● | |
| Over/under frequency protection value | ○ | ● | ● | |
| Voltage imbalance protection value | ○ | ● | ● | |
| Unbalanced current protection value | ○ | ● | ● | |
| Information Query and Display | Action records, fault records | ● | ● | ● |
| Communication | RS-485/ Modbus | ● | ● | ● |
| Signal carrier | △ | △ | △ | |
| PDA | △ | ● | ● | |
| Topology | △ | △ | △ | |
● Indicates the feature is available; △ indicates the feature is optional; ○ indicates the feature is not available.
Key Technical Specifications
| Specifications and models | 125 | 250 | 400 | 630 | |
| Rated current of the shell frame class (A) | 125 | 250 | 400 | 630 | |
| Number of poles | 3P/4P | ||||
| Rated working voltage Ue(V) | AC 400/50HZ | ||||
| Rated insulation voltage Ui(V) | 1000 | ||||
| Rated impulse withstand voltage Uimp (V) | 8000 | ||||
| Flashover distance (mm) | ≯50 | 100 | |||
| Maximum short-circuit breaking capacity (Icu, kA) | 25(S) 36(L) 50(M) | 36(S) 35(L) 50(M) 35(S) | 65(L) 70(M) | 50(S) 65(L) 70(M) | |
| Operating short-circuit breaking capacity (Ics, kA) | 20(S) 25(L) 35(M) 25(S) | 35(L) | 35(M) 35(S) 42(L) | 50(M) 50(S) 50(L) 70(M) | |
| Rated short-time current Icw (kA)/s | 1.5 | 3 | 5 | 8 | |
| Automatic closing time (S) | ≤2s | ||||
| Operation performance (times) | Set up an electric circuit | 1500 | 1000 | 1000 | 1000 |
| No power | 8500 | 7000 | 4000 | 4000 | |
| Total | 10000 | 8000 | 5000 | 5000 | |
| Overload and short-circuit characteristics | Three-stage protection with electronic adjustment. See "Protection Characteristics" for details. | ||||
| Overvoltage protection value (V) | Set value (231-330) / Default value 275V | ||||
| Undervoltage protection value (V) | Set value (88~209) / Default value 145V | ||||
| Phase loss protection value (V) | Set value (10--130) / Default value 30V | ||||
| Control delay time (ms) | ≤40ms | ||||
| Communication delay (ms) | ≤200ms | ||||
Measurement Accuracy Class
| Accuracy Type | Tolerance |
|---|---|
| Current accuracy | ±0.5%, ±1.0% |
| Voltage accuracy | ±0.5%, ±1.0% |
| Active power accuracy | ±1.0%, ±1.5%, 2.0%, 2.5% |
| Reactive power accuracy | ±1.0%, ±1.5%, 2.0%, 2.5% |
Protection Feature Description
Overload and long delay protection
The circuit breaker shall provide overload and short circuit protection, as well as photovoltaic power generation system island protection and power quality monitoring protection, and all protection functions shall support remote configuration.
1. Long delay setting value (lr) range for over-current
The current setting (lr) ranges from 0.4 to 1In, with OFF indicating the protection function is disabled.
The time delay characteristic follows the IEC standard inverse time curve, with K factor=0.14, α factor=0.02, and L factor=0. The current I is set, while Is represents the rated current.
TMS setting range: 1-10s.
The long delay protection action of over-current should meet the requirements of Table 1.
Table 1: Over-current long delay protection action table
| Short delay action current (lsd) | Movement |
|---|---|
| ≤lr | Normal operation |
| 1lr~1.5lr | After 10 minutes of continuous monitoring, the system will automatically report overload alarms and record data. If the current remains excessive after 10 minutes, the system will take further action. |
| ≥1.5lr | After 5 minutes of continuous monitoring, if the current remains excessive, disconnect the connection point and report the issue. |
Note: 1. The 3Ir value is conservative, with time and current parameters configured in the switch unit.
◆ Performance characteristic
1. Short delay setting value (Isd) range for over current
Short-time operating current (Isd) range: 1.5 to 5Ir, OFF. OFF means the protection function can be disabled.
The delay action is time-limited, with a set range of 1-10 seconds.
The short delay protection action of overcurrent should meet the requirements of Table 2.
Table 2: Overcurrent short delay protection action table
| Short delay action current (lsd) | Movement |
|---|---|
| ≤k1lr | Normal operation |
| k1lr~k2lr | Normal operation. The system actively reports over current alarms and records data. |
| ≥k2lr | Continuously monitor the tlsd time. If the current remains excessive after the tlsd time, disconnect the connection point and report the issue. |
Note: kl and k2 are set to 1.5~5lr, with kl < k2. The time and current values are configured in the switch's main unit.
2. Rated short-circuit current setting (li) range
The rated instantaneous short-circuit current setting (Ii) ranges from 2 to 12Ir, with OFF indicating the protection function is disabled.
The circuit breaker current protection operation shall meet the requirements of Table 3.
Table 3: Short circuit current protection action table
| Short-circuit current | Movement |
|---|---|
| ≥5~8Ir | Cut off the connection point in 0.2s and report |
3. The three-stage protection characteristic curve is shown below:
◆ Excess voltage protection
The overvoltage protection voltage setting (Uov) ranges from 1.05 to 1.5 times the rated voltage (Un). The OFF setting enables the protection function to be disabled.
The delay action is time-limited, with the tUov setting range being 1 to 9999 seconds.
The over voltage protection operation shall meet the requirements of Table 5.
Table 5: Overvoltage protection action table
| Maximum three-phase voltage | Movement |
|---|---|
| ≤234.5V | Normal operation |
| >234.5V | Disconnect the node after 2 seconds and report |
Note: 1. OFF means you can disable this protection feature.
2. While monitoring the voltage amplitude change, the auxiliary monitoring voltage frequency change is carried.
◆ Low-voltage protection
The molded case circuit breaker does not have this feature.
The undervoltage protection voltage setting (Uuv) ranges from 0.4 to 0.9sUn. The OFF setting enables or disables this protection function.
The delay action is time-limited, with tUuv adjustable from 1 to 9999 seconds.
The low voltage protection action shall meet the requirements of Table 6.
Table 6: Under voltage protection action table
| Maximum three-phase voltage | Movement |
|---|---|
| ≥187V | Normal operation |
| <187V | Disconnect the node after 2 seconds and report |
Note: 1. OFF means you can disable this protection feature.
2. While monitoring the voltage amplitude change, the auxiliary monitoring voltage frequency change is carried out. If the voltage frequency is basically unchanged, the above criteria are used for over-voltage protection.
◆ Terminal and contact over temperature protection
The temperature protection setting (Tem) range for terminals and contacts is 80~160°C, with OFF indicating the protection function is disabled. The delay action is time limited, with t Tem set within the range of 1 to 9999 seconds.
Terminal and contact over temperature protection action shall meet the requirements of Table 7.
Table 7: Terminal and contact overheating protection action table
| Terminal and contact temperature | Movement |
|---|---|
| ≤60℃ | Normal operation |
| 60℃~90℃ | Operates normally, actively reports terminal and contact overheating alarms and records data |
| ≥90℃ | After 60 seconds of continuous monitoring, the terminal and contact temperature remained above the limit. The connection point was disconnected and reported. |
| ≥110℃ | Cut off the connection point in 0.2s and report |
Note: The temperature detection point is near the incoming and outgoing wire terminals.
◆ Passive island protection
The passive detection method primarily identifies islanding status by monitoring the amplitude, frequency, phase, and harmonic content of the inverter's common mode voltage output. Key components include over/under-voltage protection, over/under-frequency protection, phase abrupt change detection, and harmonic detection. The set values for passive island detection criteria are:
Voltage amplitude swing (dUisl): 0.1 to 0.9Un, OFF; voltage frequency swing (dFisl): 0.5 to 25Hz, OFF.
Voltage phase swing (dPHisl): 1~60, OFF; Voltage waveform distortion rate swing (dUTHDisl): 0.5~30%, OFF.
The delay action is time-limited, with the set time tPis adjustable within the range of 0.01 to 9.99 seconds.
The passive island protection action shall meet the requirements of Table 8.
Table 8: Passive island protection action table
| Criterion fluctuation value | Movement |
|---|---|
| Voltage amplitude swing or swing range | If the voltage amplitude fluctuates beyond 20V or deviates from the [187V, 234.5V] range within 100ms, the system identifies an island. |
| Voltage frequency swing or swing range | If the voltage frequency fluctuation exceeds 0.2Hz or the fluctuation exceeds the [49.5Hz~50.2Hz] range within 100ms, the island is determined. |
Note: 1. The swing range refers to the difference between the maximum and minimum swing values within a period of time;
2. The above criteria are primarily based on voltage-frequency oscillation, with voltage-amplitude oscillation as a secondary factor. When the voltage-frequency oscillation criterion is met, the connection point shall be disconnected within 2 seconds and reported.
◆ Power generation quality monitoring and protection
The power generation harmonic monitoring and protection action shall meet the requirements of Table 9.
Table 9: Current harmonic and protection action comparison table
| Total current distortion rate | Movement |
|---|---|
| ≤5% | Normal network connection |
| ＞5% | After 60 seconds of continuous monitoring, if the harmonic levels remain above the limit, disconnect the connection point and report the issue. |
Note: OFF means you can disable this protection feature.
◆ Three-phase power generation imbalance monitoring and protection (applicable to three-phase grid-connected access)
The three-phase unbalanced protection of power generation current shall meet the requirements of Table 10.
Table 10: Negative sequence three-phase current imbalance rate and protection action
| Three-phase current imbalance rate | Movement |
|---|---|
| ≤2% | Normal network connection |
| ＞2% | After 60 seconds of continuous monitoring, if the imbalance rate remains above the threshold, disconnect the connection point and report the issue. |
Note: OFF means you can disable this protection feature.
◆ Undervoltage protection
The circuit breaker trips when the phase voltage falls below the undervoltage protection setting. Once the voltage returns to normal, the breaker automatically recloses. The undervoltage protection range is 88V to 209V, with a factory default of 187V. Users can adjust or disable the protection as needed.
◆ Phase loss protection
When a phase is missing at the power output of the line, the circuit breaker protection trips. Once the line recovers to normal voltage, it can automatically close and resume operation. The phase loss protection setting ranges from 10V to 130V, with a factory default of 30V. Users can adjust or disable the protection as needed.
◆ Autoreclose circuit breaker
After the line voltage exceeds the limit and trips, the line voltage will be automatically reclosed after 5s when the line voltage returns to normal, but the manual closing is not limited by time.
◆ External control or dynamic protection function
Note: S1 is a passive dry node; When the product is in use and no external control is applied, short S1 or disable the software's external control function.
◆ Cost control
This product can be connected to a fee-controlled meter as an external circuit breaker, compatible with both pulse-type and level-type fee-controlled meters. This feature requires configuring the switch to fee-controlled mode and enabling the "Allow" option. When operating in fee-controlled mode, the automatic protection function is disabled, preventing manual or automatic closing without a fee-controlled signal. Forced closing will automatically disconnect the circuit.
Transportation and Storage
Transportation
- During transportation, protect products from water, rain, snow, or corrosive liquids. Avoid mixing or contact with such substances.
- Prevent violent impacts or compression between items.
- Stack products according to packaging directions, with no more than four layers.
Keep in Storage
- Storage environment: ambient temperature -10°C~+45°C.
- Relative humidity: ≤90% (at ambient temperature of +20°C).
- The storage place should be free of dust and conductive dust.
- No corrosion, flammable and explosive gas, no rain or snow invasion.
- Good drying and ventilation.
- Stack according to the packaging instructions, not more than 4 layers.
Matters Need Attention
- The company does not assume the "three guarantees" responsibility for non-quality problems caused by improper installation and use and for terminal burnout caused by improper wiring.
- If you encounter any issues during product use, please contact your local distributor or our customer service center.
- Customer service hotline: 86 0577-62793566.