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Home > Electric Power > Transmission& Distribution > Circuit Breakers
CNSX Moulded Case Circuit Breaker
CNSX Moulded Case Circuit Breaker
CNSX Moulded Case Circuit Breaker
CNSX Moulded Case Circuit Breaker
CNSX Moulded Case Circuit Breaker
CNSX Moulded Case Circuit Breaker

CNSX Moulded Case Circuit Breaker

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Member Details

Yueqing Shendian Electrical Co., Ltd

China

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  • Product Details
  • Company Profile

With 30 years experience, we produce quality MCCB with moderate price. Looking for dealer, wholesaler and other type of clients for further cooperation.

Functions and characteristics

Item No.CNSX100-250CNSX400-630
Number of poles
3P, 4P
ControlManualwith toggle
with direct or extended rotary handle
ConnectionsFixedfront connections
Plug-infront connections/rear connections
Electrical characteristics as per IEC60947 and EN60947-2
Rated current(A)In16,25,32,40,50,63,80,100,125,160,200,250400,500,630
Rated insulation voltage(V)Ui800
Rated impulse withstand voltage(kV)Uimp8
Rated operational voltage(V)UeAC 50/60Hz,690
Utilization category
A
Breaking capacity levels
F      N     H
Breaking capacity (kA rms)
AC 50/60 Hz  380/415 V		lcu36,    50,   70
Service breaking capacity (kA rms)
AC 50/60 Hz  380/415 V		lcs36,    50,   70
Operation performanceMechanical2000010000
Electrical100005000
Protection
Chart B-1   B-2
Indication and control auxiliaries
Auxiliary switch
■
MX Shunt coil
■
MN under-voltage coil
■



Chart B-1

Protection

Overload protection: Thermal protection (Ir)
Thermal overload protection based on a bimetal strip providing an inverse time curve l2t, corresponding to a temperature rise limit. Above this limit, the deformation of the strip trips the circuit breaker operating mechanism.

overload protection has the following characteristics:

  • lr that can be adjusted in amps from 0.7 to 1 times the rating of the trip unit(16A to 250A),

  • corresponding to settings from 11 to 250A for the range of trip units.

Anon-adjustable time delay.

Short-circuit protection: Magnetic protection (Im) Short-circuit protection with a fixed or adjustable pick-up lm that initiates instantaneous tripping if exceeded.

  • TM-D: fixed pick-up, Im, for 16-160A ratings and adjustable from 5 to 10 x In for 200 and 250A ratings.

Chart B-2:DB112025 

Protection of distribution system

LED indications:DB112019

Protection

Settings are made using the adjustment dials with fine adjustment possibilities.
Overload protection: long time protection (lr)
lnverse time protection against overloads with an adjustable current pick-up lr set using a dial and a non-adjustable time delay tr.
Short-circuit protection: Short-time protection with fixed time delay (lsd)
Protection with an adjustable pick-up lsd.Tripping takes place after a very short delay used to allow discrimination with the downstream device.
Short circuit instantaneous protection: (li)
lnstantaneous short-circuit protection with a fixed pick-up.


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