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DATE: September
16,
1993
TO: Lift Station Files
FROM: Richard Votapka, Utilities Director
SUBJECT: Lift Station Trouble Shooting for 3 Phase Voltage Only
If the phase monitor should- blow, it can be jumped by
inserting a No. 12 or No. 10 wire (diameter of copper wire to be
the same size as the diameter of the pin) from Pin 1 to Pin 8.
Look at the wiring diagram on the phase monitor. Look for 3 pins
as shown below:
0A 0B 0C
O
4 5
03 60
02 70
normally 1 8
close 0
(P,�cZ)
normally
open
(Pins i �g) By connecting pins 1 & 8, the circuit is completed
For testing voltage on breakers, you can test each leg
individually. Use the red test lead for positive and the black
test lead for negative. You can test legs 1, 2, & 3 individually
by holding the black on ground (can use neutral lug in panel or
ground lug on bottom of cabinet). You can also test from leg 1 to
leg 2, leg 1 to leg 3, and leg 2 to 3. Readings should appear as
240 across all of them. Normally the readings will appear as 120,
208 or 220, 120 when tested individually.
Leg 2 (usually the center) should have the highest voltage.
If the legs show a much lower voltage from 120 (say 50), it is an
indication of a backfeed voltage from one of the lift station
component parts that could be shorted out.
The Flygt Submeg unit has an approximate five second delay
while it checks the pump for moisture (megs it) before the Submeg
allows the contactor to engage.
3phese