Operation
,668(23(5$7,21'$';%$
21 Safe isolation from supply and correct terminal-phase connections
7KHSDQHOVDUHHTXLSSHGZLWKWHVWVRFNHWVIRU
FRQQHFWLRQRIYROWDJHLQGLFDWLRQV\VWHPV
Fig. 34: 7HVWVRFNHWV\PERO
,IVDIHLVRODWLRQIURPVXSSO\LVQRWYHULILHGFRUUHFWO\
'DQJHU
Õ &KHFNWKHSHUIHFWXQFWLRQRIWKHYROWDJHLQGLFDWRU
DQGWKHFRXSOLQJVHFWLRQ
q RQOLYHHTXLSPHQW
q ZLWKWHVWXQLWDFFRUGLQJWR
q RQDOOSKDVHV
21.1 Verification of safe isolation from supply
Õ 5HPRYHWKHFRYHUVIURPWKHFDSDFLWLYHWHVWVRFNHWV
///
Õ 3OXJWKHYROWDJHLQGLFDWRULQDOOWKUHHSKDVHV//
/RIWKHWHVWVRFNHWV
,IWKHYROWDJHLQGLFDWRUGRHVQRWIODVKRUOLJKWXSLQ
DQ\RIWKHWKUHHWHVWVRFNHWVWKHSKDVHVDUHQRW
OLYH
Õ 5HSODFHWKHFRYHUVRQWKHWHVWVRFNHWVWRSUHYHQW
SROOXWLRQ