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Chapter 2 Installation
Electrical
I N S T A L L A T I O N
26
PM130 PLUS Powermeter Series
To connect to the external CT, pass the external CT wire through the
meter CT core, see Figure
for details and observe the arrow that
indicates the current direction.
In case of a retrofit application where each external CT ends with two
wires:
1.
Pass one wire through the meter CT core.
2.
Connect the wire to one of the meter termination screws.
3.
Connect the second wire from the external CT to the termination
screw to close the loop.
Figure
2-8 Current Input Connection
Wiring Diagrams
details.
Table 2 presents the available wiring configurations in the meter. For
more details, see
Table 2: Wiring Configurations
Wiring Configuration
Setup Code
Figure
3-wire 2-element Delta direct connection using 2 CTs
3dir2
2-9
4-wire 3-element Wye direct connection using 3 CTs
4Ln3 or 4LL3
2-10
4-wire 3-element Wye connection using 3 PTs, 3 CTs
4Ln3 or 4LL3
2-11
3-wire 2-element Open Delta connection using 2 PTs, 2 CTs
3OP2
2-12
4-wire 2½-element Wye connection using 2 PTs, 3 CTs
3Ln3 or 3LL3
2-13
3-wire 2½-element Open Delta connection using 2 PTs, 3 CTs
3OP3
2-14
4-wire 3-element Delta direct connection using 3 CTs
4Ln3 or 4LL3
2-15
3-wire 2½-element Broken Delta connection using 2 PTs, 3 CTs 3bLn3 or 3bLL3
2-16
3-wire/4-wire connection using the current from one phase (1 CT) and
the L-L voltage from the other two phases
2LL1
2-17/18
3-wire/4-wire connection using the current from one phase (1 CT) and
the L-L voltage from the other two phases
1LL3
2-19/20