User Manual

Packet Power™ Monitoring Module Users Manual
Copyright 2009-2013 Packet Power, LLC.
15
P2T3P 125V and 250V Models
Installation
Safety prerequisites
The PMM should be installed only by qualified technicians with a solid understanding of
electrical wiring and devices. Familiarity with and understanding of all terms used in this
section is assumed. The user is responsible for ensuring that all electrical connections are
safely performed in accordance with all applicable codes and regulations using appropriate
tools and materials. The user is responsible for ensuring that all applicable codes and
regulations are satisfied.
The PMM requires that a proper, external power disconnect such as switch or circuit
breaker be available upstream (on the supply side) from the unit. Power must be
disconnected before the unit is installed.
The PMM is a CAT II/CAT III measurement device. When the device is powered, line
voltages may be present on all device terminals, including the C/T terminals IA, IB, and IC.
All wiring and C/Ts connected to the device must meet the appropriate CAT II/CAT III
standards.
Please note that exact line voltages vary with regions. “120V” is used to denote voltages in
the 100-120V range. “208V” and “220V” are used to denote voltages in the 200-240V
range.
Choosing the PMM version and wiring configuration
Before installing the PMM please determine the type of circuit being monitored, including:
5. Circuit type (single phase vs. three phase, Wye vs. Delta)
6. Line voltages. Please be careful not to confuse intra-phase (e.g. X-Y) voltage with
line-neutral (e.g. X-N) voltage. Please refer to the wiring diagrams (Figure 8 through
Figure ) if necessary.
7. Line current ratings.
8. Any space considerations that may affect the choice of C/T.
Once this information is available, please refer to Table 2 below and the wiring diagrams to
determine the appropriate PMM voltage version, wiring configuration and the number of
current transformers required.
Table 2. PMM wiring options for all supported configurations
Wiring
Voltage
PMM
version
PMM terminal connections
(blank denotes “not connected”)
Diagram
P=pole
W=wire
G=ground
VA
VB
VC
N
IA
IB
IC
2P2W
1Ø 120V
PMM 120V
X
N
CTX
Figure 8
2P3WG
1Ø 120V, X-N load
PMM 120V
X
N
CTX
Figure 8
2P3WG
1Ø 120V, Y-N load
PMM 120V
Y
N
CTY
Figure 8
2P3WG
1Ø 120V, Z-N load
PMM 120V
Z
N
CTZ
Figure 8
2P3WG
1Ø 208V, X-Y load
PMM 240V
X
Y
CTX
Figure 12
2P3WG
1Ø 208V, Y-Z load
PMM 240V
Y
Z
CTY
Figure 12
2P3WG
1Ø 208V, Z-X load
PMM 240V
Z
X
CTZ
Figure 12