VIOX VMM3-400 3P 400A MCCB
VIOX VMM3-400 3P 400A MCCB: High-performance circuit breaker for power distribution networks. Features 3-pole design with 400A rated current. Operates at 400V/690V AC with 800V rated insulation voltage. Available in standard (S) and higher (H) breaking capacity types. Compliant with IEC60947-2 and GB/T14048.2 standards. Offers inverse time breaking action and adjustable instantaneous trip settings. Suitable for altitudes up to 2000m and temperatures from -5°C to +40°C. Multiple N-pole configurations available for four-pole products. Compact design with comprehensive model coding system for precise specifications. Ideal for industrial and commercial applications requiring reliable short-circuit protection and versatile installation options in demanding electrical environments.
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VIOX VMM3-400 3P 400A Moulded Case Circuit Breaker (MCCB)
Product Overview
The Viox VMM3-400 is a high-performance 3-pole 400A Moulded Case Circuit Breaker designed for short-circuit protection in power distribution networks. With its compact size, high breaking capacity, and versatile features, it’s an ideal solution for various industrial and commercial applications.
Key Features
- Rated Current: Up to 400A
- Poles: Available in 2P, 3P, 4P configurations
- Rated Working Voltage: 400V/690V AC
- Rated Insulation Voltage: 800V
- Breaking Capacity: Standard (S) and Higher (H) types available
- Compliance: IEC60947-2 and GB/T14048.2 standards
Technical Specifications
Circuit breaker rating
| Model | Frame rating rated current In(mA) |
Rated current In(A) |
Rated working voltage (V) |
Rated Insulation voltage (V) |
Rated ultimate short circuit breaking capacity Icu(kA) |
Rated operating short-circuit breaking capacity Ics(kA) |
Number of poles |
Flashover distance (mm) |
| VMM3-125S | 125 | 16,20,25,32, 40,50,60,80, 100,125 |
400/415 | 1000 | 25 | 18 | 3P | ≤50 |
| VMM3-125H | 125 | 35 | 25 | 3P | ||||
| VMM3-250S | 250 | 100,125,160, 180,200,225, 250 |
400/690 | 800 | 35/10 | 25/5 | 2P,3P,4P | ≤50 |
| VMM3-250S | 250 | 600 | 50 | 35 |
Inverse time breaking action characteristics of overcurrent release of distribution circuit breaker when all poles are energized at the same time
| Test current name | I/In | Appointed time | Starting state |
| Agreed no tripping current | 1.05 | 2h(In＞63A),1h(In≤63A) | Cold state |
| Agreed tripping current | 1.3 | 2h(In＞63A),1h(In≤63A) | Immediately after the sequence 1 test, start |
Inverse time breaking action characteristics of overcurrent release of circuit breaker for motor protection when all poles are energized at the same time
| Setting current | Appointed time | Starting state | Remark |
| 1.0In | >2h | Cold state | |
| 1.2In | ≤2h | Immediately after the sequence 1 test, start | |
| 1.5In | ≤4min | cold state | 10 ≤ In ≤ 250 |
| ≤8min | cold state | 250 ≤ In ≤ 630 | |
| 7.2In | 4s≤T≤10s | cold state | 10 ≤ In ≤ 250 |
| 6s≤T≤20s | cold state | 250 ≤ In ≤ 800 |
The instantaneous operating characteristics of the circuit breaker for distribution are set to 10In±20%, and the instantaneous operating characteristics of the circuit breaker for motor protection are set to 12In±20%.
Operating Conditions
- Altitude: Not exceeding 2000m
- Ambient Temperature: -5°C to +40°C (24-hour average not exceeding +35°C)
- Relative Humidity: Not exceeding 50% at +40°C, higher humidity allowed at lower temperatures
- Pollution Level: 3
N-pole Types
Four types of neutral pole (N pole) configurations are available for four-pole products:
- A-type N pole: Not equipped with overcurrent tripping components, always connected
- B-type N pole: Equipped with overcurrent tripping component, N pole is closed first and opened together with other poles
- C-type N pole: Equipped with an overcurrent tripping component, N pole is closed and opened together with other poles
- D-type N pole: Equipped with an overcurrent tripping component, always connected
Product Model Coding System
The VMM3 series uses a comprehensive coding system to specify exact configurations:
- V: Company code (Viox)
- M: Moulded case circuit breaker
- M3: Design code
- -: Separator
- □: Breaking capacity characteristic code (S for standard type, H for higher type)
- □: Frame rating/rated current
- /: Separator
- □: Number of poles (2P, 3P, 4P)
- □: Trip mode (2 for single magnetic, 3 for thermal magnetic)
- □: Release code (see Table 1 for details)
- □: Purpose code (2 for protecting power distribution)
- □: N-pole type (see note for details)
Release Options (Table 1)
| Attachment code | Electromagnetic release | Duplex release |
|---|---|---|
| No accessories | 200 | 300 |
| Alarm contact | 208 | 308 |
| Shunt tripper | 210 | 310 |
| Auxiliary contacts | 220 | 320 |
Shape Size and Installation Dimensions
| CJMM3-125, 250 appearance and installation dimensions (Front panel wiring) | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | Dimensions | Installation dimensions | ||||||||||||||||||
| L | W | H | L1 | L2 | W1 | W2 | W3 | H1 | H2 | H3 | H4 | C | E | F | G | G1 | A | B | Φd | |
| VMM3-125S | 150 | 92 | 76 | 251 | 132 | 30 | – | – | 95.5 | 26 | 18 | 3 | 95 | 49 | 28 | 17.5 | 8 | 30 | 129 | 4 |
| VMM3-125H | 150 | 92 | 76 | 251 | 132 | 30 | – | – | 95.5 | 26 | 18 | 3 | 95 | 49 | 28 | 17.5 | 8 | 30 | 129 | 4 |
| VMM3-250S | 165 | 106 | 87 | 300 | 144 | 35 | – | 75 | 110 | 24 | 20 | 3 | 102 | 57 | 24.5 | 23.5 | 11.5 | 35 | 126 | 5.5 |
| VMM3-250H | 165 | 106 | 105 | 300 | 144 | 35 | 142 | 75 | 127 | 24 | 20 | 3 | 102 | 57 | 24.5 | 23.5 | 11.5 | 35 | 126 | 5.5 |
The Viox VMM3-400 3P 400A MCCB offers reliable circuit protection with its robust design and advanced features. It’s an excellent choice for demanding electrical environments where performance and safety are paramount.
