NDM5 Series Molded Case Circuit Breaker
Updated：August 07,2020 10:19AM
Rated current from 16A 20A 25A 32A 40A 50A 63A 80A 100A 125A 140A 160A 180A 200A 225A 250A 315A 350A 400A 500A 630A 700A to 800A 1000A 1250A; Rated operational voltage (Ue) from 230/240VAC 400/415VAC 690VAC 800VAC 1000VAC; Rated limit short-circuit breaking capacity Icu (AC415V) from 50kA to 150 kA; including 2 poles 3 poles and 4 poles.
Description
Description of NDM5 Series
The NDM5 series of molded case circuit breakers (hereinafter referred to as MCCBs) apply to the AC 50Hz/60Hz and the rated working voltage of 1000V. The circuit breakers are used for protecting the overload, short circuit and under-voltage (with an under-voltage release) of lines and power units as well as the infrequent starting, braking, overload and short circuit of motors.
Features
Features of NDM5 Series
- It is the smallest size of all series and can be installed with standard guide gauge.
- High breaking capacity, short flashover, vibration resistance and etc.
- The circuit breaker can adopt packaged accessories for quick installation, thus responding to the user's requirements, without adjustment.
Technology data
Technology data of NDM5 Series
NDM5-160 series
| Frame current Inm (A) | 160 | |||
| Rated current In (A) | 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160 | |||
| Rated voltage Ue (V) | AC230(2P, 3P, 4P), AC415(3P, 4P), AC690(3P, 4P) | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 800V | |||
| Power frequency withstand voltage (1min) | 3000V | |||
| Rated Ultimate/Service Short-circuit breaking capacity Icu/Ics (kA) | Code | L | M | H |
| AC230V(2P, 3P, 4P) | 100/100 | 120/120 | 150/150 | |
| AC415V(3P, 4P) | 70/70 | 100/100 | 150/150 | |
| AC690V(3P,N4P) | 8/8 | 12/12 | 15/15 | |
NDM5-250 series
| Frame current Inm | 250A | |||
| Rated current In | 63A, 80A, 100A, 125A, 160A, 200A, 250A | |||
| Rated voltage Ue (V) | AC230/AC240, AC400/AC415, AC690, AC800, AC1000 | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 3500V | |||
| Rated Ultimate/Service Short-circuit breaking capacity Icu/Ics (kA) | Code | L | M | H |
| AC230V/AC240V | 70/70 | 100/100 | 150/150 | |
| AC400V/AC415V (3P /4P) | 70/70 | 100/100 | 150/150 | |
| AC690V (3P /4P) | 10/10 | 15/15 | 25/25 | |
| AC800V (3P) | 20/15 | |||
| AC1000V (3P) | 15/10 | |||
NDM5-400 series
| Frame current Inm (A) | 400 | |||
| Rated current In (A) | 250, 320, 400 | |||
| Rated voltage Ue (V) | AC400/415, AC500V, AC690, AC1000V(3P) | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 4000V | |||
| Rated Ultimate/Service Short-circuit breaking capacity Icu/Ics (kA) | Code | L | M | H |
| AC400/415V | 70/70 | 100/100 | 150/150 | |
| AC500V | 50/50 | 70/70 | 85/85 | |
| AC690V | 20/20 | 30/30 | 40/40 | |
| AC1000V(3P) | -- | -- | 35/15 | |
NDM5-630 series
| Frame current Inm (A) | 630 | |||
| Rated current In (A) | 400, 500, 630 | |||
| Rated voltage Ue (V) | AC400/415, AC500V, AC690, AC1000V(3P) | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 4000V | |||
| Rated Ultimate/Service Short-circuit breaking capacity Icu/Ics (kA) | Code | L | M | H |
| AC400/415V | 70/70 | 100/100 | 150/150 | |
| AC500V | 50/50 | 70/70 | 85/85 | |
| AC690V | 20/20 | 30/30 | 40/40 | |
| AC1000V(3P) | -- | -- | 15/10 | |
NDM5-250V series
| Frame current Inm (A) | 250 | |||
| Rated current In (A) | 63, 80, 100, 125, 160, 200, 250 | |||
| Rated voltage Ue (V) | AC800, AC1000 | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 3500V | |||
| Rated frequency(Hz) | 50/60 | |||
| Rated Ultimate breaking capacity Icu (kA) | AC800V | 50 | ||
| AC1000 | 30 | |||
| Rated Service breaking capacity Ics (kA) | AC800V | 35 | ||
| AC1000 | 15 | |||
NDM5-400V series
| Frame current Inm (A) | 400 | |||
| Rated current In (A) | 250, 320, 400 | |||
| Rated voltage Ue (V) | AC800, AC1000 | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 4000V | |||
| Rated frequency(Hz) | 50/60 | |||
| Rated Ultimate breaking capacity Icu (kA) | AC800V | 50 | ||
| AC1000 | 35 | |||
| Rated Service breaking capacity Ics (kA) | AC800V | 50 | ||
| AC1000 | 18 | |||
NDM5-630V series
| Frame current Inm (A) | 630 | |||
| Rated current In (A) | 400, 500, 630 | |||
| Rated voltage Ue (V) | AC800, AC1000 | |||
| Usage category | A | |||
| Rated impulse withstand voltage Uimp | 8000V | |||
| Rated insulation voltage Ui | 1000V | |||
| Power frequency withstand voltage (1min) | 4000V | |||
| Rated frequency(Hz) | 50/60 | |||
| Rated Ultimate breaking capacity Icu (kA) | AC800V | 50 | ||
| AC1000 | 35 | |||
| Rated Service breaking capacity Ics (kA) | AC800V | 50 | ||
| AC1000 | 18 | |||
Datasheet of NDM5 Series
NDM5-Series-MCCB-Datasheet.pdf
FAQs
Questions & Answers for NDM5 Series
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What is a molded case circuit breaker?Moulded Case Circuit Breakers Explained. ... A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.
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What is the difference between MCCB and MCB?MCB is miniature circuit breaker which is used to break small currents. Like in domestic LT circuits. The ratings usually end up to 100 A. MCCB is a Module case circuit breaker which has a rugged construction as it can break larger currents usually from (100-1000A).
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What is MCCB and its working?Molded Case Circuit Breaker (MCCB) is a circuit breaker and trip device assembled in a mould case. Also it can automatically cut off electric power in case of overload and short circuit. It is meant for higher rated current and is commonly used in Industrial applications.
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What causes MCCB to trip?Circuit overloading is known to be the most common reason for circuit breaker tripping. It simply means that we're running too many heavy power-consuming devices at the same time on the same circuit. The next most dangerous cause is a short circuit.
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How do molded case circuit breakers work?The traditional molded-case circuit breaker uses electromechanical (thermal magnetic) trip units that may be fixed or interchangeable. An MCCB provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device. Both these devices act mechanically on the trip mechanism.
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Why we use Mccb instead of MCB?If evaluated from their power capacities, the MCB is essentially used for low-current requirements, such as, home wiring or small electronic circuits; while the MCCB is better used for high-power requirements. Type of electrical switch which protects the circuit from overload or short circuit.
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