SEAL MINDER® - THERMAL MOTOR SENSOR SWITCH
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 XP-SKX Series pumps also feature thermal temperature sensor
switches that are imbedded into the motor stator windings. Two 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 G2(Green) and K(Red) wires are for the Seal Minder connections and the thermal sensors will
be connected to the m(White) and N(Black) 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 XP-SKX
Series pumps. 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.
(38 pages)
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