The characteristics of submersible
motors are different than standard motors and special overload
protection is required.
If the motor is locked, the overload protection must trip
within 10 seconds to protect the motor windings. Subtrol/SubMonitor,
a Franklin-approved adjustable overload relay, or a Franklin-approved
fixed heater must be used.
Fixed heater overloads must be the ambient-compensated quick-trip
type to maintain protection at high and low air temperatures.
All heaters and amp settings shown are based on total line
amps. When determining amperage settings or making heater
selections for a six-lead motor with a Wye-Delta starter,
divide motor amps by 1.732.
Tables 28, 29 and 30 list the
correct selection and settings for some manufacturers. Approval
for other manufacturers' types not listed may be requested
by calling Franklin's Submersible Service Hotline @ 800-348-2420.
Refer to notes on Page
29 |