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EKM8DC Thermo-magnetic type DC MCCB

EKM8DC Thermo-magnetic type DC MCCB
Technical Data

Product Selection Guide

EKM8DC 125 H 2 2
Product code Frame size rated current Rated ultimate short-circuit breaking capacity Pole number Release type
DC circuit breaker 125, 160, 250,400, 800 H :higher level type 2:2-pole
3:3-pole
4:4-pole
2-short-circuit release 3-complex release
EKM8DC 125 H 2
Accessory Rated operating voltage External accessory Wiring method
0: No
2: Auxiliary contact
3: Complex release
DC 500V-1000V Null: body operation
P: electric operation
GZ3: rotary handle
Null: front-board wiring
B: back-board wiring
C: plug-in type

 Main Performance Indexes

Frame current (A) 125 160 250
Model EKM8DС-125H EKM8DС-160H EKM8DС-250H
Pole number 2,3, 4 2,3, 4 2,3, 4
       
Rated current (A) 10,16, 20, 25, 32, 40, 50,63, 80, 100, 125 10, 16, 20, 25, 32, 40, 50,63,80, 100, 125, 140, 160 100,125,140,160,180, 200, 225, 250
Rated voltage (V) DC250V, DC500V DC750,DC1000V DC250V, DC500V DC750,DC1000V DC250V, DC500V DC750,DC1000V
Rated insulation voltage (V) DC1000V DC1000V DC1000V
Short-circuit breaking capacity(KA) Icu(Ics=70%Icu) 250VDC(35KA),500VDC(25KA) DC750V(15kA),DC1000V(10kA)
Operating cycle number Electrical life 6000 3000 3000
Mechanical life 9000 7000 7000

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

2P 50-130-68-90 60-155-88-115 -
3P 75-130-68-90 90-155-88-115 105-165-88-115
4P 100-130-68-90 120-155-88-115 140-165-88-115
Weight (kg) 2P 0.55 1 -
3P 0.65 1.1 1.5
4P 0.8 1.4 1.9
Electric operating device (MD)
External driving operating handle
Automatic release Thermal electromagnetic type
Frame current (A) 400 800
Model EKM8DС-400M EKM8DС-800H
Pole number 2,3, 4 2,3, 4
     
Rated current (A) 250,315, 350, 400, 630 500, 630, 700, 800
Rated voltage (V) DC250V, DC500V DC750,DC1000V
Rated insulation voltage (V) DC1000V DC1000V
Short-circuit breaking capacity(KA) Icu(Ics=70%Icu) 250VDC(35KA),500VDC(25KA) DC750V(15kA),DC1000V(10kA)
Operating cycle number ON 2000 1500
OFF 4000 4000
Outline dim(mm)
a-b-c-ca
2P 140-257-103-155 210-275-103-155
3P 140-257-103-155 210-275-103-155
4P 184-257-103-155 280-275-103-155
Weight (kg) 2P 5 9.5
3P 5.7 12.5
4P 7.5 1.4
Electric operating device (MD)
External driving operating handle
Automatic release Thermal electromagnetic type

 DC System Protection

System type Grounding system Ungroun ed system
Various types of reformation One pole of DC power is grounded Neutral point of DC power is grounded  
       
  Fault A Max. Isc that only to the positive pole Isc is close to max. Isc and only to the positive pole, voltage is U/2 No effect
Fault effect Fault B Max. Isc that includes two poles Max. Isc that includes two poles Max. Isc that includes two poles
  Fault C No effect Same as fault A but only to the negative pole No effect
The most serious situation Fault A Faults A and C Fault B
Pole breaking It can be connected at the positive in series, and commonly execute the breaking At each pole, they must be at U/2 The two poles to be disconnected are evenly distributed between the two electrodes

Wiring Method

Un<250V      
Un<800V        
Un<1000V        

EKM8DC Thermo-magnetic type DC MCCB