6
Thermostats are automatic reset for use in a
normally closed circuit where the thermostat is
connected in series with the holding coil of the
magnetic starter. Thermostats provide Over
Temperature Protection 2" in accordance with
NEMA MG 1Ć12.53. When the motor is so marked
locked rotor protection is not provided by the
winding over temperature protector. It is
suggested that over current protection be used
in the motor starter to insure locked rotor
protection.
MOTOR
CONTROLLER MA
Y HA
VE
AUT
O-
MATIC OR MANUAL OVERLOAD RESET.
DISCONNECT ALL POWER LEADS TO
MOTOR
WHEN PERFORMING ANY WORK
ON MOT
OR OR DRIVEN EQUIPMENT
.
A MANUAL, MOMENTARY START
SWITCH IS REQUIRED TO PREVENT AU-
TOMATIC RESTART OF MOTOR WHEN
THERMOSTAT
RESETS.
!WARNING
If current through the thermostat will exceed the
values listed in Figure 2 an intermediate control
circuit relay must be used to reduce the current
or the thermostat will not work properly.
Alternating Current
Volts Continuous
Amperes
Inrush
Amperes
110Ć120 3.0 30
220Ć240 1.5 15
440Ć480 0.75 7.5
550Ć600 0.6 6.0
FIGURE 2
TYPICAL THERMAL PROTECTOR
WIRING DIAGRAM
MOISTURE DETECTION SYSTEM
MOISTURE SENSING PROBES
Reliance Submersible Pump Motors are
equipped with moisture detection
devices. Failure to properly connect or
utilize this system voids motor warranty.
!IMPORTANT
Moisture sensing probes, leads marked W1, and
W2, must be used in conjunction with an
induction relay. This device will detect moisture
entering the oil chamber due to failure of the
outer seal and, when properly connected to a
warning device, will provide notification of
needed maintenance. Integrity of system
requires periodic test.
CONTROLS AND SIGNAL DEVICES
A control and signal device (not supplied by
Reliance) must be installed at the job site to
complete the moisture detection system.
Compatible controls are available from:
Charles F. Warrick Co., Normandy Court,
Royal Oak, Michigan 48073, (810) 549Ć4900.
P1 & P2 Normally Closed Thermostat Leads
(normally open thermostats are not acceptable to UL)
(1) Starter Holding Coil
(2) Holding Coil Contacts - N.O.
THERMOSTATS
MOTOR
P2
P1
T1 T2 T3 GRD
L1
L2
L3
AĆC LINE
AĆC LINE
STARTER
(2) (1)
P1
P2
STOP START