MI 2087 Instaltest 61557
Measurement instructions
31
Test of Selective RCD
For safety reason, Contact voltage measurement is carried out (regardless of RCD
type) before Trip-out Time measurement is realised. As the Selective type of RCD
(delayed trip-out) operates on basis of integration of fault current, it is necessary to
relax it, before Trip-out Time measurement is carried out, otherwise the test is not
relevant. That is why waiting time of 30s is involved before Trip-out Time
measurement. The waiting time is presented on display as countdown from 30 to 0.
Notes!
•
If RCD trips during Contact voltage measurement (some fault or leakage current
is probably already flowing to ground),
rcd
mark will start to blink.
•
RCD type and Nominal differential current set in this function will be offered in
other RCD functions (wherever actual)!
•
Limit Contact Voltage Ulim can be set in
Contact voltage
function only!
•
For safety reason will Trip-out Time measurement be carried out only, if Contact
voltage at nominal differential current is lower than set limit value!
•
Current, flowing to PE protective conductor, caused by faulty appliances or
capacitive connection between L and PE terminals, will influence on test result.
Disconnect such appliances before measurement is started!
•
Specified accuracy of tested parameters is valid only, if earthing system
connected to PE terminal is free of interfering voltages!
•
bat
message, displayed during or after finishing the measurement means
batteries are too weak to guarantee correct result. Replace the batteries.
