Alstom iSTAT M355, Manual, Page: 23 / 154

User Manual M3x5/EN M/B
iSTAT M3x5
Page 21
8.5 Voltage and Current measurement connections
Voltage inputs of the device can be connected directly to low voltage networks or via a
primary voltage transformer to a high voltage network.
Current inputs of the device are fed through a hole in the current transformers to allow
uninterrupted current connection. Connection to the network is performed via a
corresponding primary current transformer.
The M3x5 has the capability of measuring 4 AC voltages and 4 AC currents, and can be
configured for a number of different connections.
The wiring diagrams for the different connections are shown below.
FIGURE 8-6: EXTERNAL WIRING DIAGRAM: SINGLE PHASE (1B)
FIGURE 8-7: EXTERNAL WIRING DIAGRAM: 3-PHASE, 3-WIRE BALANCED LOAD (3B)