NDW3 Series Air Circuit Breaker
Updated：August 12,2022 14:40PM
Nader NDW3 series ACB is applicable to the distribution network with AC 50Hz / 60Hz, rated current of 200A~7500A and rated working voltage of AC220V~AC1500V. It is used to distribute electric energy and protect lines and power supply equipment from overload, undervoltage, short circuit and single-phase grounding. The isolation protection function of the circuit breaker can achieve high-precision selective protection, avoid unnecessary power failure, and improve the reliability and safety of the power supply system. The products are suitable for the needs of power distribution systems in wind power, photovoltaic, metallurgy, rail transit and other fields.
2021 Quick Selection Guide »
Features
Features of NDW3 Series
- Four types: C type (basic), L type (standard), M type (higher breaking) and H type (high breaking type) by the rated limit short-circuit breaking capability.
- Smaller size, higher breaking capability.
- Efficient short arcing, vibration resistance.
- Boxed accessories may be used for rapid installation of circuit breaker, and timely respond to the user requirements without any adjustments.
Technology data
Technology data of NDW3 Series
NDW3-1600 series
| Number of poles | 3, 4 | |
| Rated current In 40℃ | 200A, 400A, 630A, 800A, 1000A, 1250A, 1600A | |
| North pole rated current | 100%In | |
| Rated operational voltage Ue | AC220V/230V/240V, AC380V/400V/415V, AC440V/480V, AC660V/690V | |
| Rated limit short-circuit breaking capacity Icu (AC415V) | 66kA | |
| Rated operating short-circuit breaking capacity Ics (AC415V) | 55kA | |
| Rated short-time withstand current Icw (AC415V) 1s | 50kA | |
| Controller | KM controller | ● |
| KY controller | ● | |
| Installation type | Fixed type | ● |
| Drawout type | ● | |
| Special application | Wind power, plateau type circuit breaker | ● |
| Thermal-humidity type circuit breaker | ● | |
NDW3-2500 series
| Number of poles | 3, 4 | |
| Rated current In 40℃ | 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A | |
| North pole rated current | 100%In | |
| Rated operational voltage Ue | AC220V/230V/240V, AC380V/400V/415V, AC440V/480V, AC660V/690V,AC800V/1000V/1140V | |
| Rated limit short-circuit breaking capacity Icu (AC415V) |
S: 66kA H: 85kA |
|
| Rated operating short-circuit breaking capacity Ics (AC415V) | 100% Icu | |
| Rated short-time withstand current Icw (AC415V) 1s | 100% Icu | |
| Controller | KM controller | ● |
| KY controller | ● | |
| Installation type | Fixed type | ● |
| Drawout type | ● | |
| Special application | Wind power, plateau type circuit breaker | ● |
| Thermal-humidity type circuit breaker | ● | |
NDW3-4000 series
| Rated current InA | 800, 1000, 1250, 1600, 2000, 2500, 2900, 3200, 4000 | ||
| Rated current of Pole N | 100%In | ||
| Rated working voltage Ue | AC220V/230V, AC380V/400V, AC415V, AC660V/690V, AC1000V | ||
| Rated insulating voltage Ui | 1000V | ||
| Rated impact withstanding voltage Uipm | 12kV | ||
| Number of poles | 3, 4 | ||
| Fully broken time (≤690V) | ≤30ms | ||
| Closing time | ≤70ms | ||
| Short circuit breaking capacity class | S | H | |
| Rated ultimate short circuit breaking capacity Icu (effective value) | AC400V | 85kA | 100kA |
| AC690V | 75kA | 85kA | |
| AC1000V | 50kA | -- | |
| Rated operative short circuit breaking capacity Ics (effective value) | AC400V | 85kA | 100kA |
| AC690V | 75kA | 85kA | |
| AC1000V | 50kA | -- | |
| Rated short circuit connecting capacity Icm (peak value) | AC400V | 187kA | 220kA |
| AC690V | 165kA | 187kA | |
| AC1000V | 110kA | -- | |
| Rated short time withstanding current Icw (effective value) 1s | AC400V | 85kA | 100kA |
| AC690V | 75kA | 85kA | |
| AC1000V | 50kA | -- | |
| Operating performance (Times)Electrical service life | AC400V | 8000 | 5000 |
| AC690V | 6000 | 3000 | |
| AC1000V | 1000 | 500 | |
| Installation type | Fixed | ● | |
| Drawer | ● | ||
| Main circuit wiring type | Fixed | Horizontal, vertical, prolonged horizontal, prolonged vertical | |
| Drawer | Horizontal, vertical, prolonged horizontal, prolonged vertical | ||
| External dimensions: W×D×H (mm) | Fixed 3P | 428×300×392 | |
| Fixed 4P | 543×300×392 | ||
| Drawer 3P | 435×432×401 | ||
| Drawer 4P | 550×432×401 | ||
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