Siemens SENTRON 3WL10 - Portfolio of 3 VA27 Molded Case Circuit Breakers; Electronic Trip Unit (ETU)

2.7.2 Portfolio of 3VA27 molded case circuit breakers
The 3VA27molded case circuit breaker is part of the Siemens 3VAportfolio that covers all
applications from 16Ato1600A.
Selective response
Series 3VA2 circuit breakers are designed for selective tripping combined with optimum current
limiting and a high breaking capacity.
3VA2molded case circuit breakers have been speci󹪝cally designed to meet the following
requirements:
• System-wide, high selectivity with a rated current di󹪜erential of 1 : 2.5 up to the miniature
circuit breaker
• Selectivity combined with e󹪜ective current limiting and high breaking capacity
• Cost-e󹪜ective design / con󹪝guring of selective power distribution systems
Technically these requirements of the molded case circuit breakers are met as follows:
• Dynamically opening contact system
• Coordinated electronic trip units
Depending on use of molded case circuit breakers with a rated current di󹪜erential in a ratio
of at least 1 : 2.5 and selection of suitable breaking capacity classes, you can achieve selective
tripping of the area of the installation directly a󹪜ected by the fault up to the maximum
ultimate short-circuit breaking capacity.
2.7.3 Electronic trip unit (ETU)
The circuit breaker provides two series of electronic trip units (ETUs): ETUs of the 3-series and
ETUs of the 6-series.
Description
2.7Possible uses and portfolio
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 25