Technical Parameters
Parameter Description / Value
Product Series ABB VD4
Type Fixed-mounted, Spring-operated Vacuum Circuit Breaker
Rated Voltage (Ur) 12 kV
Rated Frequency 50/60 Hz
Rated Normal Current (Iu) 1200 A
Rated Short-Time Withstand Current (Ik) 25 kA (for 3 seconds, typically)
Rated Short-Circuit Breaking Current (Isc) 25 kA
Rated Making Current 62.5 kA (peak)
Rated Lightning Impulse Withstand Voltage (Up) 75 kV (across open contacts)
Rated Power-Frequency Withstand Voltage (1 min) 28 kV
Interrupting Medium Vacuum
Operating Mechanism Spring stored-energy mechanism
Mechanical Endurance Typically ≥ 10,000 operations
Electrical Endurance (at Isc) Typically ≥ 30 operations at full rated short-circuit current
Control Supply Voltage Standard options: DC 24V, 48V, 110V, 220V; AC 110V, 220V. (Specific to order.)
Standards IEC 62271-100, ANSI/IEEE C37.04, C37.06, C37.09
Typical Applications Incoming/outgoing feeders in primary distribution substations, transformer protection, large motor switching.
The ABB VD4M 1206-25 is a Medium Voltage (12kV), Fixed-mounted Vacuum Circuit Breaker from ABB's renowned VD4 series. It is a spring-operated, indoor vacuum circuit breaker designed for primary switching, protection, and control in medium voltage power distribution networks. It is typically installed in metal-clad or air-insulated switchgear for use in utility substations, industrial plants, and large commercial facilities.