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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.

NDM5-160L
NDM5-250V
NDM5-400V

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
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
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
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
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

  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • 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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