Contact person: Iris
E-mail: Iriss88@163.com
Cellphone: +0086-17728602038

Fixed line:0752-2222038

MOTOR 1.1 Verify motor nameplate data meets the application – hp, voltage, phase, and Hertz.

1.2 Check that the motor shaft rotates freely by hand on the second of two complete rotations. (On large motors, this usually requires a motor coupling with a cheater handle welded to it.)

1.3 Check that the motor lead assembly is not damaged.

1.4 Measure insulation resistance to ground at 500 volts – BEFORE SUBMERGED. It should be a minimum of 200 megohms or 200,000,000 ohms.

1.5 Measure insulation resistance to ground at 500 volts – AFTER SUBMERGED. It should be a minimum of 0.5 megohms or 500,000 ohms.

1.6 Verify the system is operating within the ±10% of nameplate voltage requirement.

1.7 Verify the system will not ever operate in excess of the maximum amps indicated on the nameplate. 1.8 Verify the system is operating at 5% or less current unbalance.

Notice:

• If current unbalance exceeds 5%, the maximum operating amps must be derated to the nameplate Full Load Amps.

• Warning - System current unbalance can not exceed 10% without causing heating and mechanical wear issues.

• The submersible motor amperage % unbalance is typically 6x greater than its voltage % unbalance.

• Thus, 0.8% voltage unbalance = greater than 5% current unbalance, and 1.7% voltage unbalance = greater than 10% current unbalance.