Doc No. 006-0211-00 Rev AD
Page 13 of 62
Installing the Resistan
ce Temperature Detector “RTD” (For
Non-Factory Installed RTDs, Probe Style)
All ESP Gauges monitor Motor Temperature with a Platinum 1K RTD. There are
several RTD Motor Temperature Probe options including Probe, Threaded, and
customer supplied. Motor Temp probes are mounted inside the gauge assembly and
placed against the Motor Windings for maximum temperature transfer and fast
response. Motor Temperature Sensors can be ordered as an accessory or wired
permanently inside the gauge eliminating field connection concern.
The following procedure appears much more complex than it actually is and can be
performed in either the field or shop environment. Also included in this document is the
wye point solder procedure that Manufacturing uses.
Motor RTD Connection Instructions
a. The first step is to determine where the RTD is going to be placed. It can be
either inside the ESP motor oil passage or inside the Sercel-GRC gauge. Inside
the gauge is the safest and is the least likely to come in contact with rotating
motor components, but it will be slower in responding to temperature variations of
the ESP motor. Placing the RTD inside the motor oil passages provides faster
response times to temperature changes, but runs the risk of contacting rotating
parts.
b. Shorten the two wires coming from the gauge for the RTD to match where you
have determined to place the RTD. If
it’s going inside the motor oil passage
secure the wiring and its excess to insure that the RTD is not drawn further into
the oil passage by the oil flowing through it. This prevents the RTD from coming
in contact with the rotating internal parts of the motor. Also insure that the wiring
will not come in contact with the end of the rotating motor shaft located where the
motor and ESP gauge are mated together. If the RTD is being placed inside the
gauge do not coil up the excess wire inside gauge but instead shorten the wires
and then insert the RTD and wiring back into the gauge. The reason for not
coiling the excess wire up and placing it inside the gauge is this can possibly
allow motor noise to show up on the motor temperature readings.
c.
Strip 1/4” to 3/8” of insulation from the RTD and gauge wires.
d.
Cut a piece of high temp heat shrink tubing, around 2.5”, and slide it over and
past both stripped gauge wires.
e. Using two more pieces of high temperature heat shrink tubing, around
1.5” long,
slide each piece over and past each individual gauge wire. The result should look
like the example in Figure 6.
