EBARA CGUII, CGFU - Manual (Page 4)

EBARA Submersible Grinder Pumps DGUII/DGFU
Operating, Installation, and Maintenance
EBARA Fluid Handling
www.pumpsebara.com 4
(t) 803 327-5005 • (f) 803 327-5097 rev. 11/05
Insulation resistance measurement:
(1) For three phase motor:
With the motor and cable (excluding the power supply connections) immersed in water, use a megger to
measure the insulation resistance between the ground wire and each phase of the motor.
(2) For single phase motor:
Use a megger to measure the insulation resistance between each wire and grounding wire.
Measure the insulation resistance. The value should be more than 1 mega ohm. While making the measure-
ment, keep the power supply cable off the ground.
When measuring the insulation resistance with meggar for motor windings do not test overload protection.
MINIATURE THERMAL PROTECTION (MTP) AND LEAKAGE DETECTOR (LD) ARE USED FOR MOTOR
PROTECTION. MTP AND LD CABLES MUST BE INSTALLED IN CONTROL CIRCUIT. MTP AND LD DO
NOT APPLY TO DGUII MODELS. DGUII MODELS USE AN AUTO-CUT DEVICE TO PROTECT AGAINST
OVER TEMP.
Before insulation resistance measurement, always disconnect the power first.
All electrical work should be performed by a qualified electrician and all national and local electrical
codes must be observed.
Installation
1. Check the following before beginning installation:
Warning
CAUTION !
CAUTION !
!