MCCB Highlights
ARXM3 Series Advantages
Advanced QPQ Technology: Mechanism parts feature German-imported QPQ heat treatment technology for superior surface processing.
Exceptional Hardness: Our operating mechanism boasts a hardness rating of 366.1, significantly outperforming alternative models which average only 252.6.
Extended Service Life: Meets high national standards for mechanical and electrical life, ensuring components resist damage during opening and closing cycles.
Main Performance Index of ARXM3 Series Circuit Breaker
| Model |
ARXM3-400 |
| Rated current In (A) |
160A / 180A / 225A / 250A / 315A / 350A / 400A |
| Rated current of frame size Inm (A) |
400A |
| Usage category |
Category A |
| Rated ultimate short-circuit breaking capacity level |
L |
M |
H |
| Number of poles (P) |
3P |
3P |
4P |
3P |
4P |
- |
| Rated working voltage Ue (V) |
400V |
| Rated ultimate short-circuit breaking capacity Icu (kA) |
50kA |
70kA |
100kA |
| Rated service short-circuit breaking capacity Ics (kA) |
50kA |
50kA |
75kA |
| Rated working voltage Ue (V) |
690V |
| Rated ultimate short-circuit breaking capacity Icu (kA) |
/ |
20kA |
/ |
| Rated service short-circuit breaking capacity Ics (kA) |
/ |
15kA |
/ |
| Rated insulation voltage Ui (V) |
1000V |
| Rated impulse withstand voltage Uimp (V) |
12kV |
| Mechanical life (time) |
4000 |
| Electrical life (time) |
1000 |
| Arcing distance (mm) |
≤ 100 |
Dimensions & Weight Specifications
| Specification Type |
3P Value |
4P Value |
| W * L * H (mm) |
150 * 258 * 111 |
200 * 258 * 111 |
| Package Dimensions (mm) |
245 * 258 * 175 |
260 * 378 * 298 |
| Weight |
5797g |
7482g |
Overall and Installation Dimensions of Circuit Breaker
Circuit Breaker 400 Frame Size Installation Safety Interval
| Model Reference |
C (mm) |
D (mm) |
| ARM3R-630(L/M/H) / ARM3-400(C/L/M/H) / ARXM3-400L/M/H |
40 |
59 |
| ARM3L-400(L/M/H) / ARM3ER-630(L/M/H) / ARM3E-400L/M/H |
26 |
49 |
Front Panel Wiring (3P, 4P)
Note: X-X, Y-Y indicate the centers of the three-pole circuit breaker.
Rear Panel Wiring (3P, 4P)
Note: X-X, Y-Y indicate the centers of the three-pole circuit breaker.
Plug-in Rear Panel Wiring (3P, 4P)
Note: X-X, Y-Y indicate the centers of the three-pole circuit breaker.
MCCB Production Line Real Showing
Frequently Asked Questions
Q What makes the operating mechanism of the ARXM3 series MCCB superior?
The operating mechanism is constructed with German-imported QPQ heat treatment technology, enabling a hardness value of 366.1. This ensures durability, structural strength, and high resistance to damage during opening and closing cycles.
Q What are the current ranges available for the ARXM3-400 model?
The ARXM3-400 circuit breaker supports multiple rated current configurations, including 160A, 180A, 225A, 250A, 315A, 350A, and 400A.
Q What is the short-circuit breaking capacity (Icu) at 400V?
The ultimate short-circuit breaking capacity (Icu) depends on the selected level: 50kA for Level L, 70kA for Level M, and 100kA for Level H.
Q What are the wiring configurations available for the ARXM3-400 series?
It supports both 3P and 4P configurations. Installation methods include front panel wiring, rear panel wiring, and plug-in rear panel wiring.
Q What is the rated insulation voltage (Ui) and impulse withstand voltage (Uimp)?
The ARXM3 series features a high rated insulation voltage (Ui) of 1000V and a rated impulse withstand voltage (Uimp) of 12kV, ensuring robust surge protection.
Q What is the operational lifespan of the ARXM3-400 MCCB?
The circuit breaker provides up to 4000 mechanical operations and 1000 electrical operations under rated parameters, maintaining strict compliance with national safety standards.
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