KELE • www.kele.com • FAX 901-372-2531
USA 901-937-4900 • International 901-382-6084
PowerTrak Installation:
Using the external mounting feet, secure the PowerTrak to a wall surface using the proper mounting hardware for
the type of wall construction involved. Pull the conduit and wiring runs through any of the eight 1/2'' knock-outs into
the enclosure and tag (identify) per job drawings. To avoid electrical noise and interference, the signal output wiring
should be kept separated from the line voltage and current transformer wiring.
Current Transformer (CT) Installation:
All CT’s should be installed with the side of the transformer labeled “H1” facing the incoming power to maintain
proper CT polarity. Connect the CT wiring to the CT INPUTS terminal block as shown in the PowerTrak wiring dia-
grams (Figures 1 & 2). If the PowerTrak is equipped with the CT shorting Assembly Option, see instructions below.
A pair of wires for each CT is required as shown in the wiring diagrams or a common CT return wire can be used
with 1 amp or 5 amp CT’s. When using the SCT Series of current transformers with the PT-9300, recommended
wiring is a twisted shielded pair for each CT to avoid noise pick-up. Ground the shield wire at the PT-9300 ground
lug only. The output from each CT should be wired to be in phase with its respective voltage. For example, the CT
installed on Phase-A is connected to the Phase-A CT input terminals X1 and X2, and the system voltage connection
from Phase-A should be to terminal L1.
Current Transformer (CT) Shorting Assembly Option:
The CT Shorting Assembly Option provides a simple and convenient means of shorting 1 amp or 5 amp current
transformer secondaries should there be a requirement to take the PowerTrak out of service. This option is
installed by securing the Shorting Assembly pins to the PowerTrak CT INPUTS terminal block, and securing the
Shorting Assembly board to the stand-offs on the PowerTrak circuit board. All CT wiring connections should be
made to the terminal strip on the Shorting Assembly Option board. A pair of wires for each CT is required as shown
in the wiring diagrams or a common CT return wire can be used. The current from each CT should be wired to be in
phase with its respective voltage. For example, the CT installed on Phase-A is connected to the Phase-A CT input
terminals X1 and X2, and the system voltage connection from Phase-A should be to terminal L1.
With the shorting
assembly jumper plugs in the SHORT position, the corresponding CT secondary is shorted. With the jumper plugs
in the NORM position, the CT secondary can be read by the PowerTrak. The jumper plugs should be placed in the
SHORT position before the shorting assembly is disconnected from the PowerTrak.
Current Transformer (CT) Installation Note: When using current transformers with small burden (load) capability (typically CT's with
ratios below 200:5), the CT secondary wiring can add significantly to the burden that must be supported by the CT. For these applica-
tions, consideration should be given to the distance between the PowerTrak and the current transformers as well as to the gauge of
the CT wiring. Refer to the Technical Reference section in the Kele catalog for more information on burden or call Kele.
Summing Current Transformers: When wiring summing CT’s, proper CT polarity and phasing with voltages must be observed. The
PowerTrak Auto-Configuration and Manual Configuration functions cannot be used with summing current transformers.
System Voltage Connections:
The system voltage connections are made to the PowerTrak terminal strip labeled SYSTEM VOLTAGE CONNEC-
TIONS. System voltages up to 600 volts can be connected directly to this terminal strip. For system voltages greater
than 600 volts, potential transformers can be used. The system voltage terminal strip is pluggable allowing for easier
wiring installation and/or removal of the PowerTrak from service. For three-phase systems refer to Figure 1 for
wiring details. Three-phase wye systems should have the neutral line connected to the PowerTrak. For single-
phase systems refer to Figure 2 for wiring details. Each system voltage connection should be wired to be in phase
with its respective CT input.
Input Wiring Installation Note:
For safety reasons, the electrical system should be de-energized before installing current transformers and making
voltage connections. Care should be taken when wiring the CT and system voltage inputs to the PowerTrak in
order to maintain proper CT polarity and proper phasing between the CT’s and system voltage connections. In the
event of inadvertent wiring errors such as reversed polarity CT’s or incorrect phasing of voltages with CT’s, the
PowerTrak auto-configuring system is used to electronically “correct” the errors and provide accurate output data.
The auto-configuring system eliminates the time consuming troubleshooting and the trial and error wire swapping
required with other power monitors.
INSTALLATION
CAUTION:
Open circuiting the secondary leads of a 1 amp or 5 amp secondary current transformer under load
can cause hazardous voltages which can injure personnel or damage equipment. Maintain a shorted circuit
across the secondary leads whenever the current transformer is not connected to the PowerTrak transducer. The
PowerTrak shorting assembly option or an externally mounted U3889 switch is recommended.
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