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CBRM5 MCCB: Ultra-Compact Circuit Breaker from China Suppliers and Factory with High Breaking Capacity
Product Model & Description
Operating Environment
Normal Operating Conditions
- The upper limit of ambient air temperature shall not exceed +40°C, the lower limit shall not be lower than -5°C, and the average temperature within 24 hours shall not exceed +35°C. Note: When the ambient air temperature exceeds +40°C or falls below -5°C, the use of the circuit breaker should be subject to agreement with the manufacturer.
- Installation altitude shall not exceed 2000 m.
- The relative humidity of the atmosphere shall not exceed 50% at the maximum ambient temperature of +40°C. Higher relative humidity is allowed at lower temperatures (e.g., 90% at 20°C), with consideration given to condensation that may occur due to temperature changes on the product surface.
Normal Installation Conditions
- Installation category: Category Ⅲ for the main circuit, Category Ⅱ for the control and auxiliary circuits.
- Installation orientation: Generally installed vertically (upright), but horizontal (flat-mounted) installation is also permissible.
- Pollution degree: Degree 3.
- External magnetic field: The external magnetic field in the installation location shall not exceed 5 times the geomagnetic field in any direction.
Trip Unit Types & Accessory Codes
Main Technical Parameters
|
Model |
CBRM5Kd-125i |
CBRM5Kd-160 |
CBRM5Kd-250 |
CBRM5Kd-400 / CBRM5Kd-630i |
CBRM5Kd-800 |
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Frame Size Current Inm(A) |
125 |
160 |
250 |
400, 630 |
800 |
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Rated Current In(A) |
16, 20, 25, 30, 32, 40, 50, 63, 70, 75, 80, 90, 100, 125 |
16, 20, 25, 30, 32, 40, 50, 63, 70, 75, 80, 90, 100, 125, 140, 150, 160 |
100, 125, 140, 150, 160, 175, 180, 200, 225, 250 |
225, 250, 280, 300, 315, 350, 400, 500, 550, 630 |
630, 700, 800 |
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Number of Poles |
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
3 |
4 |
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Rated Insulation Voltage Ui(V) |
1000 |
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Rated Operation Voltage Ue(V) |
AC380, AC400, AC415 |
AC380, AC400, AC415, AC660, AC690 |
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Rated Impulse Withstand Voltage Uimp(kV) |
8 |
12 |
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Arc Distance(mm) |
50 |
100 |
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Breaking Capacity Level |
L |
M |
H |
L |
M |
H |
L |
M |
H |
L |
M |
H |
L |
M |
H |
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Ultimate Short-Circuit Breaking Capacity Icu(kA) AC380V/AC400V/AC415V |
10 |
18 |
25 |
25 |
36 |
50 |
36 |
50 |
70 |
50 |
70 |
100 |
50 |
70 |
100 |
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Service Short-Circuit Breaking Capacity Ics(kA) AC380V/AC400V/AC415V |
10 |
18 |
25 |
25 |
36 |
50 |
36 |
50 |
70 |
50 |
70 |
100 |
50 |
70 |
100 |
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Ultimate Short-Circuit Breaking Capacity Icu(kA) AC660V/AC690V |
- |
- |
- |
8 |
10 |
10 |
10 |
10 |
10 |
10 |
15 |
20 |
15 |
20 |
20 |
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Service Short-Circuit Breaking Capacity Ics(kA) AC660V/AC690V |
- |
- |
- |
4 |
5 |
5 |
5 |
5 |
5 |
10 |
15 |
15 |
13 |
15 |
15 |
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Operating Performance (operations) |
Energized |
1500 |
1500 |
1000 |
1000 |
500 |
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De-energized |
8500 |
8500 |
7000 |
4000 |
2500 |
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Total |
10000 |
10000 |
8000 |
5000 |
3000 |
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Protection Characteristics
For Distribution Applications
Rated Current (A) |
Thermal Trip Unit (Ambient Temp +40°C) |
Magnetic Trip Unit Operating Current (A) |
|
1.05In (Cold State) Non-Tripping Time (h) |
1.3In (Hot State) Tripping Time (h) |
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10 ≤ In ≤ 63 |
No Tripping Within 1 hour |
≤ 1 |
10In ± 20% |
63 < In ≤ 800 |
No Tripping Within 2 hours |
≤ 2 |
|
For Motor Protection
Rated Current (A) |
Thermal Trip Unit (Ambient Temp +40°C) |
Magnetic Trip Unit Operating Current (A) |
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1.0In (Cold State) Non-Tripping Time (h) |
1.2In (Hot State) Tripping Time (h) |
1.5In (Hot State) Tripping Time (h) |
7.2In (Cold State) Tripping Time (s) |
Trip Level |
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10 ≤ In ≤ 25 |
No Tripping Within 2 hours |
≤ 2 |
≤ 2min |
0.5s < Tp ≤ 5s |
5 |
12In ± 20% |
25 < In ≤ 250 |
≤ 4min |
4s < Tp ≤ 10s |
10 |
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250 < In ≤ 800 |
≤ 8min |
6s < Tp ≤ 20s |
20 |
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Circuit Breaker Classification
- By Number of Poles: Three-Pole, Four-Pole
- By Application: For Distribution, For Motor Protection
- By Operating Method: Direct Handle Operation, Electric Operation (indicated by "p"), Rotary Handle Operation for Switchgear (indicated by "Z")
Frequently Asked Questions (FAQ)
What are the ambient operating temperature limits for the CBRM5 circuit breaker?
The ambient air temperature upper limit should not exceed +40°C, and the lower limit must not be below -5°C. The average temperature over 24 hours should not exceed +35°C. For operation outside these limits, please contact the manufacturer.
What is the maximum installation altitude allowed for this circuit breaker?
The installation altitude for the CBRM5 circuit breaker should not exceed a maximum of 2000 meters.
What pole configurations are available for the CBRM5 series?
The CBRM5 series is classified by the number of poles and is available in both Three-Pole and Four-Pole configurations.
What are the different operating methods supported by the CBRM5?
It supports three operating methods: Direct Handle Operation, Electric Operation (marked with "p"), and Rotary Handle Operation for switchgear (marked with "Z").
What is the rated insulation voltage (Ui) of the CBRM5 series?
The rated insulation voltage (Ui) for the CBRM5 series circuit breaker is specified at 1000V.
What are the installation categories for the main and control circuits?
The installation category is designated as Category Ⅲ for the main circuit and Category Ⅱ for the control and auxiliary circuits.