3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
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About this documentation
3VA molded case circuit breakers with UL 489 certification for the North American market
The 3VA molded case circuit breakers from the portfolio of SENTRON protection, switching,
measuring and monitoring devices ensure the reliable protection of people and property as
integral components of efficient power distribution systems.
For global applications, a special product portfolio has been developed that has the required
approvals according to standards UL 489 as well as IEC 60947. 3VA molded case circuit
breakers certified to UL 489 are suitable for the following applications:
● Incoming circuit breakers (feeders) and outgoing circuit breakers (branches) in
distribution systems
● Switching and protection devices for motors (motor protection in combination with a
contactor and motor protection relay), transformers and capacitors
● Disconnecting means with features for stopping and switching off in an emergency (main
disconnecting means and EMERGENCY-OFF switches) in conjunction with lockable
rotary operators.
The 3VA molded case circuit breakers certified to UL are available in the following versions:
1. For line protection:
The overload and short-circuit releases are designed for the protection of wiring and non-
motor loads.
2. For starter combinations:
These instantaneous trip circuit breakers are used for short-circuit protection as well as
for the disconnector function, which may be required in Combination Motor Controllers
consisting of instantaneous trip circuit breaker, overload relay and motor contactor.
These instantaneous trip circuit breakers are all equipped with adjustable, instantaneous
short-circuit releases.
3. As molded case switches:
These molded case switches can be used as feeder switches, main switches or non-
automatic circuit breakers without overload protection. They incorporate an integrated
short-circuit self-protection system.
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