MEDIUM VOLTAGE PRODUCTS
13
5.3.4 General specifications of fixed circuit breakers with lh lateral operating mechanisms for ABB UniSec switchgear (12-17.5-24 kV)
(
1
) for 12.08.20 and 17.08.20, versions with withstand voltage up to 42 kV are available
(
2
) rated duty breaking capacity 21 kA at 17.5 kV. Rated short-time withstand current 21 kA x 3 s
(
3
) rated short-time withstand current 25 kA x 2 s
(
4
) increase the indicated weight by 20 kg for circuit breakers with REF 601 devices and 3 current sensors
(
5
) “IEC” or “CEI 0-16” version. If the “CEI 0-16” is required, the circuit breaker is always supplied with 3 phase current sensors (Rogowsky coils) installed on the actual circuit breaker and with a
loose toroidal TA. In the “CEI 0-16” version, the REF 601 device opens the circuit breaker by means of the undervoltage release -MU
(
6
) the rated current of the REF 601 device must be set in the relay in accordance with the circuit breaker’s rated current
(
7
) for 12.08.20 and 17.08.20, versions with operating temperature up to -25 °C and storage temperature up to -40 °C are available
Circuit breaker VD4/L-SEC12 VD4/L-SEC17 VD4/L-SEC24
Standards
Rated voltage Ur [kV]
Rated insulation voltage Us [kV]
)
)
Impulse withstand voltage Up [kV]
Rated frequency fr [Hz]
Ir [A]
Rated duty breaking capacity
(symmetrical rated short-circuit current)
Isc [kA] – –
– –
)
) – –
– – – –
Ik [kA] – –
– –
)
) – –
)
)
) – –
) – –
Making capacity Ip [kA] – –
– –
– –
– – – –
Sequence of operations
Opening time [ms]
Arcing time [ms]
Total break-time [ms]
Closing time [ms]
Overall dimensions
(maximum)
H [mm]
W [mm]
D [mm]
Pole center-distance P [mm]
Weight (
) [kg]
)
)
)
)
Standardized dimensions table
Wiring diagram
Operating temperature [°C]
)
)
)
Tropicalization
Electromagnetic compatibility
H
W
D
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