Bender PEM533, Manual

Page: 21 / 96

Installation and connection
21 PEM533_D00013_00_M_XXEN/06.2015
4.7 Connection diagram voltage inputs
4.7.1 Three-phase 4-wire systems (TN, TT, IT systems)
The universal measuring device PEM533 can be used in 3-phase-4-wire systems, in-
dependent of the type of distribution system (TN, TT, IT system).
Fig. 4.5: Connection diagram three-phase 4-wire system
(e.g. TN-S system)
4.7.2 Three-phase 3-wire system
The PEM can be used in three-phase 3-wire systems. The line conductor voltage
must not exceed AC 400 V.
When used in 3-wire systems, the connection type
(
TYPE ) has to be set to delta connection (DELTA,
page 40).
For this purpose,
the measuring inputs L2 and N
are to be bridged .
L1
L2
L3
N
PEM
R
i
AC 400 V / 230 V