Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with IEC certificate
364 Manual, 03/2019, A5E03603177010-03
If the application requires the 3VA molded case circuit breaker to be locked in the ON (I)
position as well, the metal pin
① must be removed by pliers from the handle, see illustration
below. This deliberate action is a safety precaution and prevents accidental locking of the
breaker in the ON position.
Metal pin
Padlock devices in INSTA distribution boards
Installed padlock devices for the handle of 3VA1 molded case circuit breakers in rated
current versions 100 A, 160 A and 250 A have a cover size of 45 mm. They are therefore
suitable for installation in INSTA distribution boards.
Installation of other accessories
When the padlock device for the handle is fitted, some other accessories cannot be installed,
see chapter Possible combinations of of accessories (Page 186).
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