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NDW3 Series Air Circuit Breaker
Updated:August 07,2020 10:07AM

Rated current from 200A 400A 630A 800A 1000A 1250A 1600A 2000A 2500A 3200A to 4000A 5000A 6300 Amperes; Rated operational voltage (Ue) include 220/230/240VAC 380/400/415VAC 440/480VAC 660/690VAC 800VAC 1000/1140VAC; Rated limit short-circuit breaking capacity Icu (AC415V) from 50kA to 135kA; Installation type include fixed type and draw out type.

NDW2-1600
NDW2-3200
NDW2-6300

Description

Description of NDW3 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 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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