Siemens Sentron 3VA Manual page 19

3VA5 molded case circuit breakers
The new 3VA5 molded case circuit breakers reliably perform all the tasks required for line
protection.
Features
The key features of the 3VA5 range are:
● Compact design
● Number of poles available (dependent on size):
– 1- and 3-pole versions in size 125 A
– (2)3-pole
● Breaking capacity (dependent on size):
– 1-pole versions:
– 3-pole versions:
● Fixed mounting
● Thermal-magnetic trip units
● AC/DC applications
● Modular and easy-to-fit internal accessories with diverse functions
● Uniform accessories platform across all 3VA UL molded case circuit breakers
Compact dimensions
Due to its small dimensions, the 3VA UL molded case circuit breaker 125 A (3VA51) is
ideally suited to the protection of cables and systems wherever space is limited.
In addition, the 3VA51 molded case circuit breaker is suitable for mounting on 35 mm
DIN rails.
Thermal-magnetic trip units
The 3VA5 molded case circuit breakers have a thermal-magnetic trip unit with overload and
short-circuit protection. This has been developed for implementing economical, cost-efficient
installations up to 250 A. It is suitable for use in three-phase networks, AC networks, and
400 Hz applications and with DC currents.
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
and 3-pole version in size 250 A
1)
2-pole molded case circuit breaker in 3-pole frame
1)
Breaking capacity of 25 kA to 50 kA at 277 V AC
Breaking capacity of 25 kA to 65 kA or 100 kA (3VA52) with 480 V AC
Breaking capacity of 50 kA to 100 kA with 500 V DC
2.1 Overview - applications and portfolio
Description
17