BJM Pumps KZN(R)-F SERIES HEAVY DUTY AGITATOR TOP DISCHARGE Electric Submersible Pumps - Manual (Page 26)

26
SEAL MINDER
®
- THERMAL MOTOR SENSOR SWITCH
(For high temperature pump models)
Seal Minder:
Also known as a seal failure circuit (or moisture detection circuit) is designed to inform
the pump operator that there is moisture within the oil chamber. This early warning can
allow the operator to schedule repair & inspection on the pump. The Seal Minder
sensor probe is inside the oil chamber. (The oil chamber houses the mechanical seals
that are cooled & lubricated by oil). The Seal Minder, when properly connected to a
control panel, can help indicate seal failure. The Seal Minder cord requires a seal fail
circuit in control panel for warning signal.
Along, with the Seal Minder, the Fahrenheit
™ Series high temperature pumps also
feature thermal temperature sensor switches that are imbedded into the motor stator
windings. Three switches are imbedded into the stator windings and wired in series. The
leads are connected to the pump control panel through the sensor cable. If the windings
would see a temperature above 300 degrees F, then the switch(s) would open and cut
power to the pump. Once the temperature dropped below 300 degrees F, the switch(s)
would reset, and the pump would be returned to a state of operation. This feature is
designed to prevent damage to the stator winding and allow for longer pump life.
The sensor cable consists of four leads, two are connected to the Seal Minder, and two
are connected to the thermal sensor switches located in the stator windings. These four
leads run to the pump control panel and connect to the proper connections points for
seal alarm and thermal cut off. The black and white wires are for the Seal Minder
connections and the thermal sensors will be connected to the yellow and red wires. The
three phase automatic wiring diagram shown earlier in the manual will give a guide to
the connections in the control panel. The manual for the control panel should be
consulted for the exact connections.
The sensor cable with Seal Minder and thermal sensor switch connections is standard
on all Fahrenheit
™ Series high temperature pumps. The cable is designed for a high
temperature environment. The proper replacement part can be found parts list found in
this manual. BJM Pumps, can supply a control with the Seal Minder and Thermal
sensor switch option. Separate stand alone Seal Minder alarm panels are also
available. Consult your BJM Pumps representative for part numbers and ordering
details. BJM Pumps requires the Seal Minder and thermal sensor switches be used.
Failure to connect or misuse of these devices will void warranty.