Ulvac GLD-040 Instruction Manual page 8

0.5 Protective device
The pump is equipped with a single-phase 100-120 V (50/60 Hz) and 200-240 V (50/60 Hz)
motor.
This motor has a total of two overload protectors built in: one is of automatic reset type and the other
of manual reset type.
The automatic reset type thermal protector is intended to protect the motor when the pump is locked.
For details, refer to "4.6 Automatic Reset Type Thermal Protector." The manual reset type thermal
protector is intended to protect the auxiliary coil.
For details, refer to "4.7 Manual Reset Type Thermal Protector."
End-user has to make provisions for the installation of the over current protection of the power
circuit.
For the selection of an overload protector, refer to "3.4 Electric wiring."
Caution
The automatic reset type thermal protector, one of the overload protectors in
this motor, will automatically reset itself after it has functioned.
This motor houses an automatic returning thermal protector, which may be
activated in case of trouble. The motor will restart automatically when the
temperature goes down to 78 ± 5℃.
If the thermal protector is activated, pulled out the power plug immediately
for safety reason.
Note
Use the pump only at the rated voltage. Use at other than the rated voltage
will interfere with correct operation of the overload protector, and result
in the motor burning out, or fire.
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