CNS Moulded Case Circuit Breaker

CNS Moulded Case Circuit Breaker
CNS Moulded Case Circuit Breaker
CNS Moulded Case Circuit Breaker
CNS Moulded Case Circuit Breaker

Functions and characteristics

Item No. CNS  800-1600
Number of poles 3P, 4P
Control Manual with toggle
with direct or extended rotary handle
Connections Fixed front connections
Plug-in front connections/rear connections
Electrical characteristics as per IEC60947 and EN60947-2
Rated current(A) In In 800, 1000, 1250, 1600
Rated insulation voltage(V) Ui 800
Rated impulse withstand voltage(kV) Uimp 8
Rated operational voltage(V) Ue AC 50/60Hz,690
Breaking capacity levels                                         N            H
Utilization category AC 220/240V                        85          85
  380/415V                        50          70
440V                               50          65
500/525V                        40          50
660/690V                        30          42
Operation performance Mechanical 10000
Electrical 440V 5000
Protection                                                                                          Chart C-1
Overload protection long-time delay Ir (In x......)
Short-circuit protection short-time delay Isd (Ir x......)
Instantaneous Ii (In x......)
Indication and control auxiliaries
Auxiliary switch  
MX Shunt coil  
MN under-voltage coil  


Chart C-1

Protection thresholds and delays are set using the adjustment dials.
Offer standard long time delay setting module.

overload protection

True rms long-time protection.
Thermal memory: thermal image before and after tripping.

Short-circuit protection

Short-time(rms) and instantaneous protection.
Selection of l't type(ON or OFF)for short-time delay.

Neutral protection

On 3-pole circuit breakers, neutral protection is not possible.
On 4-pole circuit breakers, neutral protection may be set using a three-position switch: neutral unprotected (4P 3d), neutral protection at 0.5lr (4P 3d +N/2) or neutralprotection at lr (4P 4d).


Overload indication by alarm LED on the front; the LED goes on when the current exceeds the long-time trip threshold.


A mini test kit or a portable test kit may be connected to the test connector on the front to check circuit-breaker operation after installing the trip unit or accessories.

1.long-time threshold and trpping delay,2.overload alarm(LED),3.short-time pick-up and tripping delay,4.instantaneous pick-up,5.fixing screw for long-time rating plug,6.test connector

Micrologic name codes

Current protection,Micrologic 2:basic protection;Micrologic 5:selective protection;Micrologic 6:sekectuve + earth-fault protection,Micrologic 7:selective + earth - leakage

CNS-800~1600 Manual control- front connection

Toggle control

Tripping curves

CNS800 to 1600

Micrologic electronic control units

lg=In x... A B C D E F G H J
ln<400A 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
400A≤In≤1200A 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
ln>1200A 500 640 720 800 880 960 1040 1120 1200

Micrologic electronic control units 

Model Qty/CTN(pcs) GW(kg) NW(kg) Carton Size(cm)
CNS-800 3P 1 14.1 12 45.5*35.5*31.5
CNS-800 4P 1 18.2 15.4 44.5*36*42.5
CNS-1600 3P 1 14.4 12.3 45.5*35.5*31.5
CNS-1600 4P 1 18.8 16 44.5*36*42.5

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