Circuit-breaker VD4G-25 VD4G-40
Standards • •
Rated voltage Ur [kV]
Rated insulation voltage Us [kV]
Rated value
Impulse withstand voltage
Rated value Up [kV]
Rated frequency fr [Hz]
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]
(generator-source)
%
(generator-source)
IscGFF [kA]
(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
Ik [kA]
Opening time [ms]
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
—
5. Description
5.5.1. Types of withdrawable circuit-breakers available
General characteristics of withdrawable circuit-breakers
for UniGear ZS1 (15 kV) switchgear
12
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