EBARA DL3FU Operating Instructions, Installation & Maintenance Manual page 7

EBARA Submersible Sewage Pumps
DL3FU / DL3MFU / DL3KFU / DL3KMFU / DDL3FU / DV3FU/ DML3FU
Operating, Installation, and Maintenance
INSTRUCTION MANUAL
3.1.2 Insulation Resistance Measurement
WARNING: ALL ELECTRIC WORK SHOULD BE PERFORMED BY A QUALIFIED
!
ELECTRICIAN AND ALL NATIONAL AND LOCAL ELECTRICAL CODES MUST BE
OBSERVED.
Although insulation resistance of this pump was shop tested, it should be rechecked prior to
installation, using the following procedure. Usually, insulation resistance of a minimum of 1MΩ
is considered satisfactory (when measured with a DC 500V Megger).
Measurement procedure (Refer to Figs. 4 and 5)
Connect the minus (-) terminal of the DC 500V Megger to the G terminal of the cable, or a
motor bolt.
Touch the plus (+) terminal of the Megger to L1-phase (or L2-phase or L3-phase) of the cable
and read the insulation resistance.
Also, touch the plus (+) terminal of the Megger to P1 (or P2) and P3 (or P4), with the minus (-)
terminal G connected as above, and read the insulation resistance.
CAUTION: DO NOT CONNECT THE TWO MEGGER TERMINALS BETWEEN P1 AND
!
P2, OR P3 AND P4, TO AVOID DAMAGE TO THE PROTECTIVE DEVICE.
KEEP THE MOTOR CABLE OFF THE GROUND WHILE TAKING ALL MEASUREMENTS.
EBARA
PUMPS AMERICAS CORPORATION
PM32U
www.pumpsebara.com
(t) 803.327.5005 (f) 803.327.5097
－ ＋
DC500V
Megger
L1
L2
L3
G
P1 Motor Cable
P2
P3
P4
Motor Cable : Multi Conductors
Motor Cable：Multi Conductors
• ・For Power For Power
L1 : Red
L1 : Red
L2 : White
L2 : White
L3 : Black
L3 : Black
・For Ground
• For Ground
G : Green
G : Green
・For Protective Device
• For Protective Device
P1 : Red / White lined
P1 : Red
P2 : White / Red lined
P2 : White
P3 : Black / Orange lined
P3 : Black P4 : Orange / Black lined
P4 : Orange
Fig. 4
P.6
7
rev. 01/21