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China CBRM5K Compact Lockable MCCB Circuit Breaker - Reliable Suppliers for Your Factory Needs
Model and Meaning
Meets Standards
The products conform to the following international and national standards:
GB/T14048.2-2008 Low-voltage switchgear and controlgear - Part 2: Circuit breakers
GB/T17701-2008 Circuit breakers for equipment
Main Functions and Features
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 I△m(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 |
||||
| 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) | I△n≤0.5; 2I△n≤0.2; 5I△n≤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 | 1.05Ir1 | ≥2h |
| Conventional tripping current | 1.3Ir1 | <2h |
◆ Delay characteristics
Overload protection operates based on inverse time characteristics:T = (6Ir1 / I)² * tL Delay accuracy: ±10%
Where T is the action time value, Ir1 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.
Table 3: Short-circuit short-delay parameter settings
| Parameter settings | Setting value | Factory setting value |
|---|---|---|
| Short-delay operating current setting value Ir2 | 2Ir1, 2.5Ir1, 3Ir1, 4Ir1, 5Ir1, 6Ir1, 7Ir1, 8Ir1, 10Ir1, 12Ir1 | 6Ir1 |
| 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 Ir2 | No action | / |
| Action characteristics | >1.15 Ir2 | 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 Ir1, 6 Ir1, 7 Ir1, 8 Ir1, 10 Ir1, 11 Ir1, 12 Ir1, 13 Ir1, 14 Ir1, OFF | 10 Ir1 |
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 table:
| 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)
It fully complies with national low-voltage switchgear and controlgear standards, including GB/T14048.1-2012 (General), GB/T14048.2-2008 (Circuit Breakers), and GB/T17701-2008 (Equipment Circuit Breakers).
The series features comprehensive electronic three-stage protection (long-delay overload, short-delay short circuit, instantaneous short circuit), residual current (leakage) protection, over-voltage, under-voltage, and phase-loss protection.
It incorporates a high-performance 32-bit ARM microprocessor that enables real-time signal tracking and automatic adjustment of the residual current level, ensuring maximum operational continuity and reliability.
Yes, network-type models support communication functions enabling remote signaling, telemetry, remote control, and remote parameter adjustment. Optional infrared communication is also available.
Yes, protection parameters can be modified directly via the LCD display. Tripping types (leakage, overload, undervoltage, overvoltage, phase loss) are logged and can be displayed, stored, queried, or deleted.