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China CBRM5KdE Electronic Adjustable Circuit Breaker MCCB - Reliable Factory Supplier with High Breaking Capacity
Product Model & Description
- Type A: The N pole is not equipped with an overcurrent release and remains permanently connected; it does not open or close together with the other three poles.
- Type B: The N pole is not equipped with an overcurrent release but opens and closes together with the other three poles (N pole closes first and opens last).
Operating Environment
- Ambient air temperature upper limit: +40°C, lower limit: -5°C, 24h average: ≤ +35°C. (Note: Special agreements needed if outside this range).
- Installation altitude: Not exceeding 2000 m.
- Relative humidity: ≤ 50% at +40°C. Higher humidity allowed at lower temperatures (e.g., 90% at 20°C). Condensation due to temperature changes must be considered.
- Installation category: Category Ⅲ for main circuit, Category Ⅱ for control and auxiliary circuits.
- Installation orientation: Generally installed vertically (upright), but horizontal (flat-mounted) installation is permissible.
- Pollution degree: Degree 3.
- External magnetic field: 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 | ||||||||||||||||
| Frame Size Current Inm(A) | 125 | 160 | 250 | 400, 630 | 800 | ||||||||||||||||
| 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 | ||||||||||||||||
| Number of Poles | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | 3 | 4 | |||||||||||
| Rated Insulation Voltage Ui(V) | 1000 | ||||||||||||||||||||
| Rated Operation Voltage Ue(V) | AC380, AC400, AC415 | AC380, AC400, AC415, AC660, AC690 | |||||||||||||||||||
| Rated Impulse Withstand Voltage Uimp(kV) | 8 | 12 | |||||||||||||||||||
| Arc Distance(mm) | 50 | 100 | |||||||||||||||||||
| Breaking Capacity Level | L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | ||||||
| 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 | ||||||
| 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 | ||||||
| Ultimate Short-Circuit Breaking Capacity Icu(kA) AC660V/AC690V | - | - | - | 8 | 10 | 10 | 10 | 10 | 10 | 10 | 15 | 20 | 15 | 20 | 20 | ||||||
| Service Short-Circuit Breaking Capacity Ics(kA) AC660V/AC690V | - | - | - | 4 | 5 | 5 | 5 | 5 | 5 | 10 | 15 | 15 | 13 | 15 | 15 | ||||||
| Operating Performance (operations) | Energized | 1500 | 1500 | 1000 | 1000 | 500 | |||||||||||||||
| De-energized | 8500 | 8500 | 7000 | 4000 | 2500 | ||||||||||||||||
| Total | 10000 | 10000 | 8000 | 5000 | 3000 | ||||||||||||||||
Protection Characteristics
| 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) | ||
| 10 ≤ In ≤ 63 | No Tripping Within 1 hour | ≤ 1 | 10In ± 20% 160 Frame, 16-32A: 400A ± 20% |
| 63 < In ≤ 800 | No Tripping Within 2 hours | ≤ 2 | |
| Rated Current (A) | Thermal Trip Unit (Ambient Temp +40°C) | Magnetic Trip Unit Operating Current (A) | ||||
|---|---|---|---|---|---|---|
| 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 (h) | Trip Level | ||
| 10 ≤ In ≤ 25 | No Tripping Within 2 hours | ≤ 2 | ≤ 2min | 0.5s < Tp ≤ 5s | 5 | 12In ± 20% 160 Frame, 16-32A: 400A ± 20% |
| 25 < In ≤ 250 | ≤ 4min | 4s < Tp ≤ 10s | 10 | |||
| 250 < In ≤ 800 | ≤ 8min | 6s < Tp ≤ 20s | 20 | |||
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 is the difference between Type A and Type B four-pole circuit breakers?
Type A features an N pole that is not equipped with an overcurrent release, remains permanently connected, and does not open or close together with the other three poles. Type B also has no overcurrent release on the N pole, but it opens and closes together with the other three poles (closing first and opening last).
What are the normal operating temperature limits for these circuit breakers?
The ambient air temperature should be between -5°C and +40°C, with a 24-hour average temperature not exceeding +35°C. Under conditions outside this range, usage must be agreed upon with the manufacturer.
Can these circuit breakers be installed horizontally?
Yes, although they are generally designed for vertical (upright) installation, horizontal (flat-mounted) installation is also permissible.
What is the maximum installation altitude for these devices?
The standard installation altitude for these circuit breakers must not exceed 2,000 meters.
What operating methods are available for these circuit breakers?
They can be operated using three methods: Direct Handle Operation, Electric Operation (indicated by the code "p"), and Rotary Handle Operation for Switchgear (indicated by the code "Z").
What are the installation categories for the circuits?
The main circuit falls under Installation Category Ⅲ, while the control and auxiliary circuits fall under Installation Category Ⅱ.