METREL EasiPLUS MI 3000 User Manual

MI 3000 EasiPLUS Safety and operational considerations
8
RCD functions
 Parameters set in one function are also kept for other RCD functions!
 The measurement of contact voltage does not normally trip an RCD. However,
the trip limit of the RCD may be exceeded as a result of leakage current flowing
to the PE protective conductor or a capacitive connection between L and PE
conductors.
 The RCD trip-lock sub-function (function selector switch in LOOP position) takes
longer to complete but offers much better accuracy of fault loop resistance (in
comparison to the R
L
sub-result in Contact voltage function).
 RCD trip-out time and RCD trip-out current measurements will only be performed
if the contact voltage in the pre-test at nominal differential current is lower than
the set contact voltage limit!
 The autotest sequence (RCD AUTO function) stops when trip-out time is out of
allowable time period.
Fault loop / RCD trip-lock impedance
 The low limit prospective short-circuit current value depends on fuse type, fuse
current rating, fuse trip-out time and impedance scaling factor.
 The specified accuracy of tested parameters is valid only if the mains voltage is
stable during the measurement.
 Fault loop impedance measurements will trip an RCD.
 The measurement of fault loop impedance using trip-lock function does not
normally trip an RCD. However, the trip limit may be exceeded as a result of
leakage current flowing to the PE protective conductor or a capacitive connection
between L and PE conductors.
Line impedance
 The low limit prospective short-circuit current value depends on fuse type, fuse
current rating, fuse trip-out time and impedance scaling factor.
 The specified accuracy of tested parameters is valid only if the mains voltage is
stable during the measurement.

METREL EasiPLUS MI 3000 Specifications

General

Brand	METREL
Model	EasiPLUS MI 3000
Category	Test Equipment
Language	English