Pe Test Terminal - METREL MI 3122 Instruction Manual

MI 3122 Smartec Z Line-Loop / RCD

5.5 PE test terminal

It can happen that a dangerous voltage is applied to the PE wire or other accessible metal
parts. This is a very dangerous situation since the PE wire and MPEs are considered to be
earthed. An often reason for this fault is incorrect wiring (see examples below).
When touching the TEST key in all functions that require mains supply the user
automatically performs this test.
Examples for application of PE test terminal
L1
N
PE
Figure 5.18: Reversed L and PE conductors (application of plug commander)
L1
N
PE
Figure 5.19: Reversed L and PE conductors (application of universal test cable)
Reversed phase and
protection conductors!
T HE MOST DANGEROUS
SITUATION!
Reversed phase and
protection conductors!
MOST DANGEROUS
SITUATION!
N PE L
36
PE test terminal