Motor Not Running - ITT Goulds Pumps G Serie Instrucciones De Instalación, Operación Y Mantenimiento

DISCONNECT AND LOCKOUT
WARNING
ELECTRICAL POWER BEFORE AT-
Hazardous
TEMPTING ANY MAINTENANCE.
voltage
FAILURE TO DO SO CAN CAUSE
SHOCK, BURNS OR DEATH.
SYMPTOM

MOTOR NOT RUNNING

See Probable Cause – 1 through 5
LITTLE OR NO LIQUID DELIVERED BY PUMP
See Probable Cause – 6 through 1
POWER CONSUMPTION TOO HIGH
See Probable Cause – 3, 1, 13, 15
EXCESSIVE NOISE AND VIBRATION
See Probable Cause – 3, 6 - 8, 10, 1, 13, 16
PROBABLE CAUSE
1. Motor thermal protector tripped.
2. Open circuit breaker or blown fuse.
3. Impellers binding.
4. Motor improperly wired.
5. Defective motor.
6. Pump is not primed, air or gases in liquid.
7. Discharge, suction plugged or valve closed.
8. Incorrect rotation (three phase only).
9. Low voltage or phase loss.
10. Impellers worn or plugged.
11. System head too high.
12. NPSH A too low – excessive suction lift or losses.
13. Discharge head too low – excessive flow rate.
14. Fluid viscosity, specific gravity too high.
15. Worn bearing.
16. Pump, motor or piping loose.
8
Maximum Working Pressure =
(1SV , SV , 3SV , SV)
30 psi (16 bar) with the oval suction and
discharge flanges
360 psi (5 bar) with ANSI suction and
discharge flanges
Maximum Liquid Temperature =
30º F (110º C)
STARTS PER HOUR / MINIMUM RUN TIME – 3 Phase Only
maximum Starts Per Hour
HP
(evenly distributed)
1 15
1.5 13
2 12
3 9
5 8
7.5 7
10 6
15 5
20 5
25 5
30 4
40 4
50 3
60 3
75 3
NoTE(S)
1) Recommended motor starts per hour and minimum run time calculated based on
NEMA standards MG1-12.44 in accordance to manufacturers allowable tolerance
for heat rise and insulation breakdown.
2) Applied voltage and frequency in accordance with NEMA MG1-12.44
3) Starts based on NEMA three phase design A and design B AC induction motors.
4) External load WK2 is equal to or less than the values listed in NEMA MG1-12.54
5) Applicable to all NEMA JM, JP, T and TC frame motors used for Goulds Pumps
products.
6) SINGLE PHASE starts and run time depend on many factors (e.g. capacitor size/
type, wire size and length, switch type) and will not be the same as three phase
motors.
minimum Run Time Between
Starts (seconds)
75
76
77
80
83
88
92
100
110
115
120
130
145
170
180