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EKM8 Thermo-magnetic Moulded Case Circuit Breaker

EKM8 Thermo-magnetic Moulded Case Circuit Breaker
Technical Data

Ambient and Installation Conditions

● Altitude up to 2000m;
● Ambient medium temperature should be within -5℃ to +40℃ (+45℃ for marine products);
● It can withstand the effect of damp air;
● It can withstand the effect of moulds;
● It can withstand the effect of nuclear radiation;
● The max inclination is 22.5℃.
● It still can work reliably when the ship subjects to normal vibration;
● It can still work reliably if the product subjects to the earthquake (4g).
● Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
● Keep away from rain or snow.

Components of Circuit Breaker

Components of Circuit Breaker

Product Selection Guide

EKM8 125 C P 4
Product code Frame size Current class Code of control circuit source voltage Pole number
Moulded-case
circuit breaker
125 160 250 400 630 800
Note:
125 is upgraded type of 63 frame
160 is upgraded type of 100 frame
250 is upgraded type of 225 frame
630 is upgraded type of 400 frame
  S M H P: electric operation
Z: rotary handle
W: direct operation
3: 3-pole
4: 4-pole
125 25/18   -1.4 35/25  
160 25/18   50/35
250 25/18 35/25 50/35
400 35/25 50/35 65/65
630 35/25   50/35   65/65
800 35/25 50/35 65/65
300 125A 2 A
Release type and internal accessory Rated current (A) Application Code of four-pole product
The first digit represents release type
2: Has instantaneous release only
3: Complex release Note:
Later two digits are the code of accessories (see accessory table)
125 10, 16, 20, 25, 32, 40, 50,63, 80, 100, 125 1: power distribution
2: motor protection
A: N-pole without protection cannot close or open
B: N-pole without protection can close and open
C: N-pole with protection can close and open
D: N-pole with protection cannot close or open
160 63, 80, 100, 125, 140, 160
250 100, 125, 140, 160,180, 200, 225, 250
400 250, 300, 315, 350, 400
630 400, 500, 630
800 500, 630, 700, 800
Q1 D1 Q 2
Accessory voltage Electric operation voltage Installation methods Install wiring board or not
Undervoltage release Shunt release Auxiliary alarm DC1 Electric Operation DC3 Electric Operation Q: Front-board
H: Back-board
C: Plug-in type
1: No
2: Yes
Q1: AC220V F1: AC220V J1: AC125V D1: AC220V D5: AC230V
Q2: AC240V F2: AC380V J2: AC250V D2: AC230V D6: AC110V
Q3: AC380V F3: DC110V J3: DC125V D3: AC380V D7: DC220
Q4: AC415V F4: DC24V J4: DC24V D4: AC400V D8: DC110
        D9: AC110-240V
        D10: DC100-220V
  Note:
Adaptable voltages for two electric
operations. Please refer to the
introduction of external accessory.
 

Main Performance Indexes

Frame current (A) 125 160
Model EKM8-125S EKM8-125H EKM8-160S EKM8-160M EKM8-160H
Pole number 1, 2, 3, 4   2, 3, 4    
 
Rated current (A) 10, 16, 20, 32, 25, 40, 50,63, 80, 100, 125 63, 80, 100, 125, 140, 160  
Rated voltage (V) AC400V AC400V    
Rated insulation voltage (V) AC1000V AC1000V    
Short-circuit breaking capacity(KA)Icu/Ics AC400V 25/18 35/25 25/18 35/25 50/35
Operating cycle number Electrical life 6000 3000
Mechanical life 9000 7000

Outline dim(mm)
a-b-c-ca

1P 25-130-68-90 - - -
2P 50-130-68-90 60-155-68-90 60-155-68-90 60-155-88-115
3P 75-130-68-90 90-155-68-90 90-155-68-90 90-155-88-115
4P 100-130-68-90 120-155-68-90 120-155-68-90 120-155-88-115
Weight (kg) 1P 0.32 - - -
2P 0.5 0.55 1 1.1
3P 0.55 0.65 1.1 1.2
4P 0.65 0.8 1.4 1.5
Electric operating device (MD)
External driving operating handle
Automatic release Thermal electromagnetic type
Frame current (A) 250 400
Model EKM8-250S EKM8-250M EKM8-250H EKM8-400S EKM8-400M EKM8-400H
Pole number 3, 4 3, 4
 
Rated current (A) 100, 125, 140, 160, 180,200, 225, 250 250,315,350,400
Rated voltage (V) AC400V AC400V
Rated insulation voltage (V) AC1000V AC1000V
Short-circuit breaking capacity(KA)Icu/Ics AC400V 25/18 35/25 50/35 35/25 50/35 65/65
Operating cycle number Electrical life 3000 2000
Mechanical life 7000 4000

Outline dim(mm)
a-b-c-ca

 
3P 105-165-68-92 105-165-88-115 140-257-103-155
4P 140-165-68-92 140-165-88-115 184-257-103-155
 
Weight (kg)  
2P 1.5 1.7 5.5
3P 1.9 2.1 7
 
Electric operating device (MD)
External driving operating handle
Automatic release Thermal electromagnetic type
Frame current (A) 630 800
Model EKM8-630S EKM8-630M EKM8-630H EKM8-800S EKM8-800M EKM8-800H
Pole number 3, 4 3, 4
 
Rated current (A) 250, 315, 350, 400, 500, 630 500, 630, 700, 800
Rated voltage (V) AC400V AC400V
Rated insulation voltage (V) AC1000V AC1000V
Short-circuit breaking capacity(KA)Icu/Ics AC400V 35/25 50/35 65/65 35/25 50/35 65/65
Operating cycle number
Electrical life  
2000 1500
Mechanical life 4000 4000
Outline dim(mm)
a-b-c-ca
 
3P 140-257-103-155 210-275-103-155
4P 184-257-103-155 280-275-103-155
 
Weight (kg)  
2P 5.7 9.5
3P 7.5 12.5
 
Electric operating device (MD)
External driving operating handle
Automatic release Thermal electromagnetic type

Thermo-magnetic Moulded Case Circuit Breaker