InsulGard System Installation and Start Up Guideline
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1.4. InsulGard system installation for a motor
1) Typical Insulgard system for a motor
A typical InsulGard for a motor is usually installed on a panel and in a Nema-4X enclosure. Examples of installation
shown below:
a
b
Note: If a conduit is installed on top of the enclosure (b), be sure to use appropriate seals to prevent water from
entering.
For InsulGard installation and sensor connection refer to section 1.1 above -
For sensor connection, you must
temporarily remove the InsulGard monitor from the panel and put aside until the sensors are connected.
Typical sensor installation and to InsulGard connection for a motor is shown in Figure 1-12. The sensors are:
a) Three IPDS sensor installed in the motor terminal box
b) One RTD-6 PD Sensor Board installed in motor RTD terminal box. For large motors and generators with
many RTDs, a second board is needed for better monitor stator winding condition
c) External Temperature and Humidity sensors installed in the Motor terminal box
d) Load sensor installed on the wire of secondary winding of motor metering CT. If there is no close motor
metering CT, the CTF sensor can be installed on phase A motor feeder. (If feeder has few cables, install
CTF only on one of them.)
e) Sometimes RFCT sensors can be additionally installed on wires that provide grounding of cable shields for
all three phases cables
For sensor installation refer to section 1.2 and 1.3 above (
and some additional specifics described
below.
