Savant Standalone Energy Monitor Deployment Guide
Copyright 2020 Savant Systems, Inc
009-1928-01 | 200828
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3.3. Voltage Transformers
The SEM-VT01 is a highly accurate voltage transformer that reduces the input voltage by a factor of 0.00111. For example, if the input voltage is 120V
AC, the output of the SEM-VT01 will be 0.133V
RMS
. By reducing the voltage, the SEM-2015/SEM-1024 can monitor individual circuits with exceptional
accuracy.
IMPORTANT INFO!
–
One voltage transformer is required for each phase.
–
Install SEM-VT01 voltage sensor as close to the electrical breaker panel as possible.
–
Between the voltage transformer and the SEM-2015/SEM-1024 it is best to have as short a run as possible.
–
Voltage transformers should be installed on there own breakers with no load attached.
Savant requires a licensed electrician be used to connect the SEM-VT01 to the high voltage side. Follow instructions below to install. The instructions
assume the electrical outlet boxes are mounted and an electric circuit is run into the box.
1.
Switch the circuit breaker to the circuit that the
SEM-VT01 is being added to.
2. Using diagram to the right, make high voltage connections.
3. Screw the SEM-VT01 into the electrical box.
4. Using the supplied 2-pin screw down connectors and
#18 AWG wire, install the wires into the 2-pin connector.
Refer to the connector diagrams below when wiring.
5. For instructions on how to install wires into the 2-pin
connectors, refer to step 4 of the Current
Transformers section.
IMPORTANT!
Voltage transformer and SEM connection
terminals use reversed polarities. Exercise caution when
making connections to avoid error.
6. Once all connections are made, switch the breaker back ON.
HELPFUL INFO
: Each voltage transformer is capable of supporting up to three SEM-2015 units, provided the following requirements are met:
–
SEM-2015 units must be connected in a daisy chain pattern.
–
Wiring used must be 18 AWG or greater twisted pair.
–
Total run length must not exceed 8 ft (2.4 m).
Additional voltage transformers must be utilized when deploying more than 3 SEM-2015 units.
From 3-Phase
Electrical Panel
Connect Voltage
Sensor to each Phase
POS(+)
GND (-)
POS(+)GND (-)
VT Connector
on SEM-VT01
VT Connector
on SEM-2015
