A 1322 / A 1422
Operation
11
4.2 Power supply considerations
The 3-phase 32 A socket (8) of A 1322 / A 1422 is intended for connection to mains
supply. A1322 / A1422 can be connected to single-phase and 3-phase mains supply.
The figure below shows connections of supply cords for both possibilities.
Figure 4.3:
Mains supply cable for single-phase supply and 3-phase supply
The A 1322 / A 1422 works in TN/TT supply systems with distributed N and/or NPE and
rated supply voltages U
L
-
N
/ U
L
-
L
230/400 V and/or 120/208 V.
Operation on 3-phase system without N conductor
The A 1322 / A 1422 can also be supplied in 3-phase 4W system (without N conductor).
In this case the master instrument can not be supplied from the A 1322 / A 1422 and
shall be connected to an external 1-phase wall socket.
Some tests can not be performed successfully:
Active tests/measurements (differential and touch leakages, active polarity,
PRCD testing and functional test) on 16 A (3 pole: L+N+PE) test socket.
Active polarity test on 5 pole (L1+L2+L3+N+PE) 16 A and 32 A test sockets.
PRCD testing on all test sockets.
