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0102030405
China CBRM5KdE Electronic Adjustable MCCB Suppliers - Ultra-Compact Circuit Breaker Factory with High Breaking Capacity
Product Model & Description
Four-Pole Product Codes
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
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: Special agreements with the manufacturer are required if temperatures exceed these limits).
- 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), considering condensation due to temperature changes.
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: Shall not exceed 5 times the geomagnetic field in any direction at the installation location.
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
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) | ||
| 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 | |
For Motor Protection
| 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 | ≤ 2 min | 0.5s < Tp ≤ 5s | 5 | 12In ± 20% 160 Frame, 16-32A: 400A ± 20% |
| 25 < In ≤ 250 | ≤ 4 min | 4s < Tp ≤ 10s | 10 | |||
| 250 < In ≤ 800 | ≤ 8 min | 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)
Q1: What is the normal operating temperature range for the circuit breaker?
The ambient air temperature should be between -5°C and +40°C, with a 24-hour average not exceeding +35°C. If your application requirements fall outside this range, please consult the manufacturer.
Q2: Can the CBRM5Kd circuit breaker be installed at high altitudes?
Yes, the device is rated for installation at altitudes up to 2000 meters under normal operating conditions.
Q3: What is the difference between Type A and Type B four-pole configurations?
In Type A, the N pole is permanently connected and does not open or close with the other three poles. In Type B, the N pole does not have an overcurrent release but is designed to open and close together with the other three poles (closing first and opening last).
Q4: Are horizontal installations allowed for this circuit breaker series?
Yes. While the standard installation orientation is vertical (upright), horizontal (flat-mounted) installation is also permissible.
Q5: What are the available operating methods?
The circuit breakers can be operated via three methods: Direct Handle Operation, Electric Operation (coded as "p"), or Rotary Handle Operation for Switchgear (coded as "Z").
Q6: What is the relative humidity limit for safe operation?
The relative humidity should not exceed 50% at the maximum temperature of +40°C. Higher humidity (such as 90% at 20°C) is acceptable at lower temperatures, provided condensation on the product surface is managed.