Overview
The WDM1 series MCCB has a rated insulation voltage of 800V. Suitable for infrequent switching in distribution lines with AC 50Hz, rated working voltage of 400V, and rated working current up to 1250A (motors below 400A can also be used for infrequent starting).
The circuit breaker has overload, short circuit, and undedžoltage protection functions.
This circuit breaker has isolation function, and its corresponding symbol is"
"
Model Meaning and Classification
There are four types of N poles for 4P circuit breakers
●Type A: No overcurrent tripping component is installed on the N pole, and the N pole is always connected and does not open and close together with the other three poles;
●Type B: The N pole is not equipped with an overcurrent tripping component, and the N pole is closed and opened together with the other three poles; (the N pole is closed ǁrst and then opened)
●Type C: The N pole is equipped with an overcurrent tripping component, and the N pole is closed and opened together with the other three poles; (the N pole is closed ǁrst and then opened)
●Type D: The N pole is equipped with an overcurrent tripping component, and the N pole is always connected and does not open or close together with the other three poles.
Normal working conditions
Ambient air temperature
●The upper limit of ambient air temperature is +40 .
●The lower limit of ambient air temperature is -5 .
●The 24h average value of the ambient air temperature does not exceed +35°C.
●Altitude: The altitude of the installation site does not exceed 2000m.
Atmospheric conditions
●The relative humidity of the atmosphere does not exceed 50% when the ambient air temperature is +40°C; it can have higher relative humidity at lower temperatures;
●The monthly average maximum relative humidity of the wettest month is 90%, while the monthly average minimum temperature of the month is +25℃, and the condensation on the suDŽace of the product due to temperature changes is taken into account.
●Pollution level: The pollution level is level 3.
Main parameters (Fixed type)
| Frame Size |  |  |  |  | ||||||||
| Model | WDM1-63 | WDM1-125 | WDM1-250 | WDM1-400 | ||||||||
| Rated current(A)In | 10A 16A 20A 25A 32A 40A 50A 63A | 16A 20A 25A 32A 40A 50A 63A 80A 100A 125A | 100A 125A 160A 180A 200A 225A 250A | 225A 250A 315A 350A 400A | ||||||||
| Number of poles | 1P 2P 3P 4P | |||||||||||
| Standard | IEC60947-2 | |||||||||||
| Rated operational voltage | 380V/400/415V/690V | |||||||||||
| Rated insulation voltage Ui(V) | 800/1000V | |||||||||||
| Rated impulse with stand voltage Uimp(kV) | 8KV | |||||||||||
| Breaking capacity level | L | M | H | L | M | H | L | M | H | L | M | H |
| Rated ultimate short-circuit breaking capacity Icu(KA) (400/690V) | 400V | 400V | 400V/690V | 400V | 400V/690V | 400V/690V | ||||||
| 25 | 35 | 50 | 35 | 50/10 | 85/20 | 35 | 50/10 | 85/10 | 50/10 | 65/10 | 100/10 | |
| Rated service short-circuit breaking capacity Ics(KA) (400/690V) | 18 | 20 | 35 | 25 | 35/5 | 50/10 | 25 | 35/5 | 50/5 | 35/5 | 42/5 | 65/5 |
| Mechanical life | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1500 | 1000 | 1000 | 1000 |
| Electrical life | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | 2000 | 2000 | 2000 |
Main parameters (Fixed type)
| Frame Size |  |  |  |  | |||
| Model | WDM1-630 | WDM1-800 | WDM1-1250 | WDM1-1600 | |||
| Rated current(A)In | 400A 500A 630A | 630A 700A 800A | 700A 800A 1000A 1250A | 1250A 1600A | |||
| Number of poles | 3P 4P | ||||||
| Standard | IEC60947-2 | ||||||
| Rated operational voltage | 380V/400/415V/690V | ||||||
| Rated insulation voltage Ui(V) | 800/1000V | ||||||
| Rated impulse with stand voltage Uimp(kV) | 8KV | ||||||
| Breaking capacity level | L | M | H | M | H | M | M |
| Rated ultimate short-circuit breaking capacity Icu(KA) (400/690V) | 400V/ 690V | 400V/690V | 400V | 400V/ 690V | 400V/ 690V | ||
| 50/20 | 65/20 | 100/20 | 75/20 | 100 | 65/20 | 65/20 | |
| Rated service short-circuit breaking capacity Ics(KA) (400/690V) | 35/20 | 42/10 | 65/10 | 50/10 | 65 | 42/10 | 42/10 |
| Mechanical life | 1000 | 1000 | 1000 | 1000 | 1000 | 5000 | 5000 |
| Electrical life | 2000 | 2000 | 2000 | 2000 | 2000 | 800 | 800 |
Accessories name and the Release method
| Installation Instruction | Symbol | Accessory Name | Abbreviation | |
 | □ | Alarm Contact | SD | |
| ■ | Auxiliary Contact | OF | ||
| ● | Shunt Trip Device | MX | ||
| ○ | Under-voltage Release | MN | ||
| → | Lead Direction | Lead Direction | ||
| Code | Accessory Name | Abbreviation | Model DWM1-63~250 | Model DWM1-400~800 |
| 00 | No accessories | |||
| 08 | Alarm Switch | SD |  | |
| 10 | Shunt trip | MX |  |  |
| 20 | Auxiliary Switch (1NO1NC) | OF(1NO1NC) |  | |
| Auxiliary Switch (2NO2NC) | OF(2NO2NC) | | ||
| 02 | Auxiliary Switch(2NO2NC) | OF(2NO2NC) | | |
| 30 | Undervoltage Release | MN |  | |
| 40 | Shunt Trip Auxiliary Switch(1NO1NC) | MX+OF(1NO1NC) |  | |
| Shunt Trip Auxiliary Switch(2NO2NC) | MX+OF(2NO2NC) | | ||
| 12 | Shunt Trip Auxiliary Switch (2NO2NC) | MX+OF(2NO2NC) | | |
| 50 | Shunt trip +under-voltage releaase | MX+MN |  | |
| 60 | Two Group Auxiliary Switch(2NO2NC) | 2 OF(2NO2NC) |  | |
| Two Group Auxiliary Switch (4NO4NC) | 2 OF (4NO4NC) | | ||
| 22 | Two Group Auxiliary Switch (3N03NC) | 2 OF(3N03NC) | | |
| 23 | Two Group Auxiliary Switch (4NO4NC) | 2 OF(4NO4NC) | | |
| 70 | Undervoltage Release + Auxiliary Switch(1NO1NC) | MN+OF(1NO1NC) |  | |
| Undervoltage Release + Auxiliary Switch(2NO2NC) | MN+OF(2NO2NC) | | ||
| 32 | Undervoltage Release + Auxiliary Switch(2NO2NC) | MN+OF(2NO2NC) | | |
| 18 | Shunt Trip Alarm Switch | MX+SD |  |  |
| 28 | Auxiliary Switch(1N01NC) Alarm Switch | OF(1N01NC)+SD |  | |
| 38 | Undervoltage Release Alarm Switch | MN+SD |  | |
| 48 | Shunt trip+Auxiliary contact (1NO1NC)+Alarm swtich | MX+OF(1NO1NC)+SD |  |  |
| 68 | Two Group Auxiliary Switch (2N02NC)Alarm Switch | 2 OF (2N02NC)SD |  | |
| 05 | Two Group Auxiliary Switch (3N03NC)Alarm Switch | 2 OF (3N03NC)SD | | |
| 78 | Undervoltage Release Auxiliary Switch (1N01NC)Alarm Switch | MN OF (1N01NC)SD |  | |
The WDM1 series MCCB has a rated insulation voltage of 800V. Suitable for infrequent switching in distribution lines with AC 50Hz, rated working voltage of 400V, and rated working current up to 1250A (motors below 400A can also be used for infrequent starting).
| Distribution circuit breaker | Circuit breakers for protecting electric motors | ||||||
| Rated current In (A) | Thermal release | Electromagnetic release action current (A) | Rated current In (A) | Thermal release | Electromagnetic release action current (A) | ||
| 1.05ln agreed non release time h (cold state) | 1.30ln agreed release time h (hot state) | 1.05ln agreed non release time h (cold state) | 1.2ln agreed release time h (hot state) | ||||
| 10sln≤63 | 1 | 1 | 10ln±20% | ||||
| 63<ln≤125 | 2 | 2 | 5ln±20% | 10≤ln≤630 | 2 | 2 | 12ln±20% |
| 125<n≤800 | 2 | 2 | 10ln±20% | ||||
WDM1 Accessaries
The Spare parts details are as following (we not only provide CBU,but also SKD)
Shape and installation dimensions
