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0102030405
CBRM5K Compact Lockable Molded Case Circuit Breaker (MCCB) - China Factory Suppliers for Enhanced Safety
Model and Meaning
Meets Standards
The products conform to the following standards:
GB/T14048.1-2012 Low-voltage switchgear and controlgear - Part 1: General;
GB/T14048.2-2008 Low-voltage switchgear and controlgear - Part 2: Circuit breakers;
GB/T17701-2008 Circuit breakers for equipment.
Main Functions and Features
- It adopts a high-performance 32-bit ARM microprocessor for real-time signal processing and intelligent control;
- The LCD Chinese display provides a user-friendly interface and simple operation;
- It features residual current (leakage current) protection with online adjustment of the residual current level and reclosing function;
- It monitors and tracks the residual current of the line in real time and automatically adjusts the level to ensure the product's operational rate and reliability;
- It offers three-stage protection: long-delay, short-delay, and instantaneous, using electronic tripping that is independent of power supply voltage;
- It has high breaking capacity to ensure the reliability of line short-circuit protection;
- Over-voltage protection, under-voltage protection, phase loss protection;
- Real-time display of line residual current, three-phase power supply voltage, and load current;
- Protection functions and parameters can be set and modified online;
- The tripping type (residual current, lockout, overload, undervoltage, overvoltage, phase loss) can be identified, displayed, stored, queried, and deleted;
- Network-type models have communication capabilities, enabling remote signaling, telemetry, remote control, and remote adjustment;
- Pluggable surge protection modules (optional);
- Feature infrared communication (optional).
Main Technical Parameters
| Specifications and Models | CBRM3EL-125CY CBRM3EL-125CS |
CBRM3EL-250CY CBRM3EL-250CS |
CBRM3EL-400CY CBRM3EL-400CS |
CBRM3EL-630CY CBRM3EL-630CS |
CBRM3EL-800CY CBRM3EL-800CS |
|
| Frame rating rated current (A) | 125 | 250 | 400 | 630 | 800 | |
| Extreme number | 3P+N | 3P+N, 2P | 3P+N | 3P+N | 3P+N | |
| Rated operating voltage Ue (V) | AC 400/50HZ | |||||
| Rated insulation voltage Ui (V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 8000 | |||||
| Flight arc distance (mm) | ≤50 | ≤100 | ||||
| Ultimate short-circuit breaking capacity Icu(kA) | 50 (H type 70) | 65 (H type 85) | 65 | |||
| Operating short-circuit breaking capacity Ics(kA) | 35 (H type 50) | 42 (H type 65) | 42 | |||
| Rated residual short circuit connection (disconnection) Ability IΔm(kA) | 12.5 (H type 17.5) | 16.25 (H type 21.5) | 16.25 | |||
| Rated short-time withstand current Icw (kA)/s | 1.5 | 3 | 5 | 8 | 10 | |
| Residual current operating characteristics | AC type | |||||
| Rated residual operating current IΔN(mA) | 50/100/200/300/400/500/600/800 MCU Automatic tracking or manual setting |
100/200/300/400/500/600/800/1000 MCU Automatic tracking or manual setting |
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| Remaining motion time characteristics | Delayed/Non-delayed | |||||
| Delay-type limit of non-drive time (s) | 0.06/0.1/0.2 optional: 2IAn | |||||
| Break time (s) | IΔn≤0.5; 2IΔn≤0.2; 5IΔn≤0.15 | |||||
| Automatic reclosing time (s) | 20-60 | |||||
| Operational performance (times) | power ups | 1500 | 1000 | 1000 | 500 | |
| No power | 8500 | 7000 | 4000 | 2500 | ||
| Total number of times | 10000 | 8000 | 5000 | 3000 | ||
| Overload and short-circuit characteristics | Three-stage protection, electronically adjustable; see "Protection Feature Description" for details. | |||||
| Overvoltage protection value (V) | Set value (250~300) ± 5% | |||||
| Undervoltage protection value (V) | Set value (145~200) ± 5% | |||||
| Joint control delay time (ms) | ≤40ms | |||||
| Communication delay time (ms) | ≤200ms | |||||
Protection Features Description
Overload long delay protection
Action value setting range
Table 1: Overload Long Delay Parameter Settings
| Parameter | Frame current | Setting value | Factory setting value |
| Action setting value Ir1 | 125 | 50A, 63A, 80A, 100A, 125A | 125A |
| 250 | 100A, 125A, 140A, 160A, 180A, 200A, 225A, 250A | 250A | |
| 400 | 160A, 180A, 200A, 225A, 250A, 315A, 350A, 400A | 400A | |
| 630 | 250A, 315A, 350A, 400A, 500A, 630A | 630A | |
| 800 | 315A, 350A, 400A, 500A, 630A, 700A, 800A | 800A | |
| Delay time setting value tL | 3s, 4s, 6s, 8s, 10s, 12s, 16s, 18s, OFF | 12s | |
Action characteristics
Table 2: Protective Action Characteristics
| Ambient temperature | Current Name | Setting current multiple | Agreed Time |
| +40℃ | Non-tripping current agreed upon | 1.05lr1 | ≥2h |
| Conventional tripping current | 1.3lr1 | <2h |
Delay characteristics
Overload protection operates based on inverse time characteristics:
T=(6Ir1/I)2tL Delay accuracy: ±10%
Where T is the action time value, lr1 is the long delay protection setting value, I is the fault current, and TL is the long delay time setting value.
Short circuit short delay protection
Short-circuit short-delay protection prevents impedance short circuits in power distribution systems, and the tripping delay is for selective protection. Short-circuit short-delay protection parameter settings.
Table 3: Short-circuit short-delay parameter settings
| Parameter settings | Setting value | Factory setting value |
| Short-delay operating current setting value Ir2 | 2lr1, 2.5lr1, 3lr1, 4lr1, 5lr1, 6lr1, 7lr1, 8lr1, 10lr1, 12lr1 | 6lr1 |
| Short delay time setting value ts | 0.1s, 0.2s, 0.3s, 0.4s, 0.6s, 0.8s, 1.0s, OFF | 0.4s |
Short-circuit short-delay protection operation characteristics
Table 4: Short-circuit short-delay action characteristics
| Characteristic | Fault current multiple | Tripping characteristics | Delay error |
| Non-action characteristics | ≤0.85 lr2 | No action | / |
| Action characteristics | >1.15 lr2 | Delayed action | ±40ms |
Instantaneous protection Short-circuit instantaneous protection related parameter settings
Table 5: Instantaneous Parameter Settings
| Parameter settings | Setting value | Factory setting value |
| Instantaneous operating current setting value Ir3 | 4 lr1, 6 lr1, 7 lr1, 8 lr1, 10 lr1, 11 lr1, 12 lr1, 13 lr1, 14 lr1, OFF | 10 lr1 |
Short circuit instantaneous protection operation characteristics
Table 6: Instantaneous motion characteristics
| Characteristic | Current multiple (I/Ir3) | Tripping characteristics | Tripping time |
| Non-action characteristics | ≤0.85 | No action | ≥200ms |
| Action characteristics | >1.15 | Instantaneous action | <200ms |
Residual current protection characteristics
Gear setting range
| Parameter | Setting values (125, 250, 400) | Setting values (630, 800) | Factory setting value |
| Residual operating current IΔn | 50, 100, 200, 300, 400, 500, 600, 800 (Auto) | 100, 200, 300, 400, 500, 600, 800, 1000 Automatic | 500 |
External Shape and Installation Dimensions
Note: The auxiliary contact is on the left and the surge protection module is on the right in the diagram; the dimensions of the accessories are the same for all models.
Characteristic Curves
Frequently Asked Questions (FAQ)
What standards do these circuit breakers conform to?
The products conform to standard specifications GB/T14048.1-2012 (Low-voltage switchgear and controlgear - Part 1: General), GB/T14048.2-2008 (Part 2: Circuit breakers), and GB/T17701-2008 (Circuit breakers for equipment).
What microprocessor technology is used in the device?
It adopts a high-performance 32-bit ARM microprocessor to perform real-time signal processing and intelligent control.
Does the circuit breaker support remote monitoring and communication?
Yes, network-type models have communication capabilities that enable remote signaling, telemetry, remote control, and remote adjustment. Optional infrared communication is also available.
How does the residual current protection feature operate?
It monitors and tracks the residual current (leakage current) of the line in real time, allowing online adjustment of the residual current level and features an automatic tracking or manual setting via MCU.
What kinds of protections are offered in the three-stage protection system?
It includes overload long-delay protection, short-circuit short-delay protection, and short-circuit instantaneous protection, using electronic tripping that operates independently of the power supply voltage.
What auxiliary modules can be optionally integrated?
The unit supports optional pluggable surge protection modules and infrared communication modules depending on installation requirements.