Accessories
4.3 Connection system
3VA molded case circuit breakers with IEC certificate
248
Manual, 03/2019, A5E03603177010-03
Terminal cover, extended terminal cover, and offset terminal cover
All terminal covers afford degree of protection IP40 at the front of the breaker and degree of
protection IP20 at the infeed and load ends provided that they are correctly installed (cutting
of grille structure).
All terminal covers have a marking on the inside face which can be drilled through before the
cover is installed. A voltage detector can be inserted through this hole to test for safe
isolation.
WARNING
Reduced degree of protection
If a hole is drilled through the terminal cover, degree of protection IP40 is no longer
afforded.
Suitable precautions must be taken to safeguard against any hazards posed by this loss of
protection.
①
Marking for holes
Phase barriers can also be installed on all terminal covers in order to maintain the required
clearances and creepage distances which might be reduced as a result of ionized gas
following a short circuit.
