Hobby optima - Page 106

Electrical Installations
07-22
Thetrippingtimefortheresidualcurrentdevice(RCD)
witharesidualcurrentof30mAislessthan0.1seconds.
Afterputtingtheelectricsystemintooperation,thefunctionof
theresidualcurrentdevicemustbechecked.Aftervoltagehas
beenappliedtotheswitch
j
anditison(settoI-ON)itmust
setowhenyoupressthetestbutton
k
.
Therockerswitch
k
(p.07-20)jumpsdown;afterithas
successfullybeencheckeditmustbeswitchedbackuptothe
"On"setting.
Thischeckshouldbecarriedoutatleastonceamonthtoen-
surethattheresidualcurrentdevicefunctionsperfectlyincase
there should be a fault in the current.
Devicesthatsetoduringoperationshowthatthereisa
defect;theymustbecheckedand/orrepairedbyanelectrical
engineeringspecialist.
Whentheresidualcurrentdevicehasbeenseto(even
whentesting)thecustomisedsettingsinallmains-operated
devices are lost and the default settings made by the ma-
nufacturerwillapplyagain.
Iftheautomaticcircuitbreakerhasgoneo(otherthanifyou
haveswitchedit)youmustwaitashortwhilebeforeswitching
it on again.
-Iftheautomaticcircuitbreakerremainsactive,therewasonly
an overload.
Switchingitbackonagainandagainwilldonogood.The
automaticcircuitbreakeralsogoesowhentherocker
switchisheldrmlyinplace.
-Iftheautomaticcircuitbreakergoesoabruptlyagain,thereis
either a short circuit or an earth fault.