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1.1 OVERVIEW
The man-machine interface (MMI) consists of a backlit alphanumeric display and a keypad to accommodate
1
relay programming as well as viewing actual motor parameters which comprise:
•
AC stator current
•
Power factor
•
DC field current
•
DC field voltage
•
DC field resistance
•
Running time meter (RTM)
Statistical data includes number and type of trips.
The SPM performs a complete system check prior to starting the motor.
1-2
Courtesy of store.ips.us
AC BUS
Stator
I
AC
Protection
(469)
V
AC
I
DC
Calibrator
V
DC
DC
CT
MOTOR
DC SUPPLY
CLUTCH
COUPLING
LOAD
ANS I DEVICE NUMBERS
Field overtemperature
26F
Undervoltage
27
Underc urrent or underpower
37
Inc omplete sequenc e
48
Instantaneous overc urrent
50
55
Power fac tor
Field applic ation
56
Lock out
86
T ripping
94
Reluc tanc e torque sync. / resync.
95
96
Autoloading relay
Figure 1–1: SINGLE LINE DIAGRAM
SPM Synchronous Motor Protection and Control
48
SPM
86
94
55
50
37
27 26F
95
48
94
95
56
96
701767A9.CDR
1 INTRODUCTION
GE Multilin
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