NDM3 Series Molded Case Circuit Breaker
Updated：August 07,2020 10:13AM
Rated current from 10A 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 380/400/415VAC 500VAC to 660/690VAC; Rated limit short-circuit breaking capacity Icu (AC415V) from 35kA to 100 kA; including 3 poles and 4 poles.
Description
Description of NDM3 Series
The NDM3 series of molded case circuit breakers (hereinafter referred to as MCCBs) apply to infrequent switching of circuits with the AC 50/60Hz, the rated working voltage of AC690V and rated working current of 1250A as well as infrequent motor starting. Meanwhile, the circuit breaker features the overload alarm non-tripping function. In case of the line overload, the circuit breaker with the function will not be tripped, but only output the overload signal to ensure the power supply continuity. Products can be used for a duration of 8 hours at 1.3 times of the rated current with the performance remaining the same after cooling. The circuit breaker can substitute the thermal relay alarm solutions; with the overload, short circuit and undervoltage protection functions, the circuit breaker can protect lines and power equipment from damage.
Features
Features of NDM3 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 NDM3 Series
NDM3-63 series
| Rated current of housing Inm (A) | 63 | |||||
| Rated current In (A) | 10, 16, 20, 25, 32, 40, 50, 63 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | L | M | ||||
| Rated limit short-circuit breaking capacity Icu(kA) |
AC380/400/41 5V |
36 | 55 | 55 | ||
| AC500V | 20 | 20 | ||||
| AC660/690V | 12 | 12 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
AC380/400/41 5V |
36 | 40 | 40 | ||
| AC500V | 15 | 15 | ||||
| AC660/690V | 10 | 10 | ||||
NDM3-100 series
| Rated current of housing Inm (A) | 100 | |||||
| Rated current In (A) | 10, 16, 20, 25, 32, 40, 50, 63, 80, 100 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | C | |||||
| Rated limit short-circuit breaking capacity Icu(kA) |
AC380/400/41 5V |
40 | 40 | |||
| AC500V | 15 | 15 | ||||
| AC660/690V | 12 | 12 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
AC380/400/41 5V |
30 | 30 | |||
| AC500V | 12 | 12 | ||||
| AC660/690V | 10 | 10 | ||||
NDM3-125 series
| Rated current of housing Inm (A) | 125 | |||||
| Rated current In (A) | 16, 20, 25, 32, 40, 50, 63, 80, 100, 125 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | L | M | H | |||
| Rated limit short-circuit breaking capacity Icu(kA) |
41 5V |
40 | 70 | 100 | 70 | |
| AC500V | 40 | 40 | ||||
| 690V | 20 | 20 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
41 5V |
30 | 50 | 70 | 50 | |
| AC500V | 40 | 40 | ||||
| 690V | 10 | 10 | ||||
NDM3-160 series
| Rated current of housing Inm (A) | 160 | |||||
| Rated current In (A) | 125, 140, 160 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | C | L | M | |||
| Rated limit short-circuit breaking capacity Icu(kA) | 400V | 35 | 40 | 70 | 70 | |
| 690V | 20 | 20 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) | 400V | 25 | 30 | 50 | 50 | |
| 690V | 10 | 10 | ||||
| Sizes (W×L×H)mm | NDM3-160C：3P | 92×139×75.5 | ||||
| NDM3-160L：3P | 92×150×74.5 | |||||
| NDM3-160M：3P | 92×150×92.5 | |||||
| NDM3-160：4P | 122×150×92.5 | |||||
NDM3-250 series
| Rated current of housing Inm (A) | 250 | |||||
| Rated current In (A) | 100, 125, 140, 160, 180, 200, 225, 250 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | L | M | H | |||
| Rated limit short-circuit breaking capacity Icu(kA) |
AC380/400/41 5V |
40 | 70 | 100 | 70 | |
| AC500V | 40 | 40 | ||||
| AC660/690V | 20 | 20 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
AC380/400/41 5V |
30 | 50 | 70 | 50 | |
| AC500V | 40 | 40 | ||||
| AC660/690V | 10 | 10 | ||||
NDM3-400 series
| Rated current of housing Inm (A) | 400 | |||||
| Rated current In (A) | 225, 250, 315, 350, 400 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | C | L | M | H | ||
| Rated limit short-circuit breaking capacity Icu(kA) |
41 5V |
35 | 50 | 70 | 100 | 70 |
| AC500V | 50 | 50 | ||||
| 690V | 20 | 20 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
41 5V |
35 | 50 | 70 | 75 | 70 |
| AC500V | 50 | 50 | ||||
| 690V | 15 | 15 | ||||
NDM3-630 series
| Rated current of housing Inm (A) | 630 | |||||
| Rated current In (A) | 400、500、630 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | C | L | M | H | ||
| Rated limit short-circuit breaking capacity Icu(kA) |
41 5V |
35 | 50 | 70 | 100 | 70 |
| AC500V | 50 | 50 | ||||
| 690V | 20 | 20 | ||||
| Rated operating short-circuit breaking capacity Ics (kA) |
41 5V |
35 | 50 | 70 | 75 | 70 |
| AC500V | 50 | 50 | ||||
| 690V | 15 | 15 | ||||
NDM3-800 series
| Rated current of housing Inm (A) | 800 | |||||
| Rated current In (A) | 630, 700, 800 | |||||
| Rated insulation voltage Ui (AC V) | 1000 | |||||
| Rated impulse withstand voltage Uimp (V) | 800 | |||||
| Number of poles | 3 | 4 | ||||
| Rated limit short-circuit breaking capacity level | M | H | ||||
| Rated limit short-circuit breaking capacity Icu(kA) |
AC380/400/41 5V |
70 | 100 | 70 | ||
| AC660/690V | 70 | 100 | 70 | |||
| Rated operating short-circuit breaking capacity Ics (kA) |
AC380/400/41 5V |
70 | 75 | 70 | ||
| AC660/690V | 70 | 75 | 70 | |||
Datasheet of NDM3 Series
NDM3-Series-MCCB-Datasheet.pdf
FAQs
Questions & Answers for NDM3 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.
