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OIMM – VENTUS PRO
Fans' motors with belt drive are powered by 3x400V/50Hz voltage. The connection should be done through the
overload and short-circuit protection suitable for rated current of the motor.
•
direct-on-line starting: The thermal overload really should preferably be set to the motor full load current
shown on the motor rating plate.
•
star-delta starting: The thermal overload really should preferably be set to the 0.58 x motor full load shown
on the motor rating plate.
After thermal overload relay settings is done it should be checked that thermal overload relay works properly at
normal operating conditions, by operating motor on two phases.
•
the terminal markings of motors conform to the international standards. Stator terminals are marked, U.V.W
and the neutral terminal N,
•
please check data on the rating plate. The voltage marked on the rating plate must be in agreement with the
mains voltage.
•
the terminal board is normally equipped with 6 terminals. Details concerning the connection are given on the
inside cover of the terminal box and / or on a diagram placed inside by the manufacturer.
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THERMAL OVERLOAD RELAY SETTING
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MOTOR TERMINAL MARKINGS:
!
Specifications require that all motors to be earthen properly. Special terminal in the terminal
box should be used for this purpose.
!
To avoid the danger of overloading and operation on two phases, the motors should be
protected either with fuses and thermal/thermo magnetic switches or electronic circuits.
!
If the electric heater will be used, electrical connections should be done according to the
information on the heater label.
!
INTERMEDIATE FAN DRIVE – 1-SPEED AC MOTOR
Direct-on line starter with control circuit
Star-Delta starter
