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.
Send your requirements, we will quote for you within 12 hours
- TEL:+8618066396588
- Whatsapp:+8618066396588
- Email:sales@viox.com
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.
EN 
ES 
DE 
FR 
IT 
RU 
JA 
NL 
AR 
PT 
TR 
ID 
EL 
KO