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G. ELECTRIC MOTOR DRIVE
If the pump driver is an electric motor, a motor starter with overload protection must
be provided. The overload resets should be set according to local code. Refer to
motor nameplate. Direction of rotation of pump shaft must be counterclockwise
when facing pump shaft extension. Make motor electrical connections accordingly.
Changing any two leads on a three phase motor will change direction of motor
rotation.
Be sure that the power source is correct for the driver.
Determine the power to be used, and provide the appropriate wire size.
When a 10HP (7.5 kw) with R11 pumps or 50HP (37.5 kw) with RG, RO, 2100 or
2200 pumps or smaller motor is used, a slow-trip overload relay is
recommended to prevent tripping during start-up. The rotor assembly of a
Roto-Jet pump has a relatively high moment of inertia, and requires an
extended acceleration period with these motors before operating speed is
reached.
WARNING
ALL ELECTRICAL CONNECTIONS AND WIRING ARE TO BE IN COMPLIANCE
WITH LOCAL BUILDING AND SAFETY CODES.
DO NOT OPERATE EQUIPMENT WITH OPEN ELECTRICAL BOXES OR
FITTINGS. CONTACT WITH INCORRECTLY WIRED EQUIPMENT COULD
RESULT IN INJURY.
H.
GUARDS
Rotating sheaves and drive belts, must be guarded as required by applicable local
safety codes and OSHA regulations to protect personnel from injury. The pump
should never be allowed to operate until this protection has been provided. A guard
is part of the belt drive package which is optionally furnished by Roto-Jet Pumps.