ABB VD4G-25 - 5.4.1. General characteristics of fixed circuit-breakers

5.4.1. General characteristics of fixed circuit-breakers
General characteristics of fixed circuit-breakers (15 kV)
Circuit-breaker VD4G-25 VD4G-40
Standards
 • •
Rated voltage
Ur [kV]  
Rated insulation voltage
Us [kV]  
Withstand voltage at 50 Hz
Rated value   
Impulse withstand voltage
Rated value Up [kV]  
Rated frequency fr [Hz]  
Rated current  Ir [A]     
Rated breaking capacity (system-source)
Symmetrical short-circuit current IscSFF [kA]  
DC component of breaking capacity %  
Symmetrical short-circuit current (system-
source)
IascSFF [kA]  
Rated breaking capacity (generator-source)
Symmetrical short-circuit current IscGFF [kA]  
DC component of breaking capacity Class G1
(generator-source)
%  
Symmetrical short-circuit current Iscg Class G2
(generator-source)
IscGFF [kA]  
DC component of breaking capacity Class G2
(generator-source)
%  
Rated breaking current under out-of-phase conditions
Rated symmetrical short-circuit current IscOOP [kA]  
DC component of breaking current %  
Making current Ip [kA]  
Rated operating sequence during short-circuit interruption 
Short-time withstand current (3s) Ik [kA]  
Opening time [ms] 
Maximum arcing time (generator-source fault - 130% DC
component at contact separation)
[ms]  
Closing time [ms] 
Maximum
overall
dimensions
H [mm]     
W [mm]     
D [mm]     
Pole center-distance P [mm]     
Weight [kg]     
Standardized dimensions table    
Operating temperature [°C] 
(1) 4000 A with forced ventilation
D
H
W
P
P
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5. Description
8
VD4G INSTALLATION AND OPERATING INSTRUCTIONS