MI 2087 Instaltest 61557
Measurement instructions
38
Test of Selective RCD
For safety reason, Contact voltage measurement is carried out in each step
(regardless of RCD type), before Trip-out Time measurement is done. 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 30s of waiting time is involved in some
steps namely: Step 3, Step 4, Step 5 and Step 6. The waiting time is presented on
display as countdown from 30 to 0.
Notes!
•
Limit Contact Voltage Ulim can be set in
Contact voltage
function only!
•
RCD type and Nominal differential current set in this function will be offered in
other RCD functions (wherever actual)!
•
For safety reason will Automatic RCD test be carried out only, if Contact voltage
at nominal differential current (Standard RCD is selected) or at double nominal
differential current (Selective RCD is selected) 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.
