IEC Certified facility for
SERVICING EXPLOSION PROOF MOTORS
FINAL INSPECTION REPORT OF 75 KW MOTOR
Customer
:
ALMEER Technical Services Co.
Submitted by
:
Bader Al-Mulla &Bros Co. W.L.L
Dated
:
23/06/2019
Motor Specification:
MAKE
HP/KW
VOLTAGE
PHASE
DE Bearing
Lubrication
WEG
75 KW
440
3
6314/C3
Mobil Polyrex EM
SR.NO
RPM
CURRENT
FREQUENCY
NDE Bearing
EX Type
1033634131
2975
115
50 Hz
6314/C3
II 2G Ex de IIB T4
Above mention motor received our workshop for overhauling and following activities have
been carried out as per IEC 60079-19
Repairs Carried Out:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
Performed initial electrical test on motor and results are satisfactory.
Motor was dismantled for diagnostic inspection.
Stator winding was inspected and found OK.
Bearing seat and bearing housing sizes were measured and found with in tolerance
Both side grease cap seat size were measured and found DE side size was out of tolerance.
Reclaimed DE side grease cap seat by metalizing and machining.
End cover ID and frame OD sizes were measured & found ok
Rotor was dynamically balanced to grade 1.0 of ISO 1940
Reassembled the motor with new bearing on both side
Final solo run test was carried out and all parameters found ok .
Motor was paint & dispatched.
Prepared By : Seenivas
Approved By : Imtiaz M Jamadar
IEC Certified facility for
SERVICING EXPLOSION PROOF MOTORS
Electrical Test :
S. No
1
Test
Result
Stator winding
Resistance@29° C
U-V
61.16 mΩ
V-W
61.81 mΩ
U-W
61.18 mΩ
2
Insulation Resistance
@ 500 V
3
Winding RTD
113.6 Ω ( 6 Nos)
4
Space Heater
186.6 Ω
29.5
GΩ
Vibration Readings (rms):
Position
V
H
A
DE side
mm/sec
0.74
0.71
0.63
NDE side
mm/sec
0.54
0.58
0.61
No-Load Test:
Voltage
@ 415 V
U phase
29.4 Amps
V phase
29.6 Amps
W phase
29.8 Amps
Attached : Balancing Report
Prepared By : Seenivas
Approved By : Imtiaz M Jamadar