GE 469

CHAPTER 5: SETTINGS
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–37
FIGURE 5–5: Typical Time-Current and Thermal Limit Curves
(ANSI/IEEE C37.96)
1
10
8
6
4
2
100
80
60
40
20
200
300
400
0 100 200 300 400 500 600 % CURRENT
TIME-SECONDS
HIGH
INERTIA
MOTOR
RUNNINGOVERLOAD
A
G
B
C
A,B,ANDC ARE THE
ACCELERATION THERMALLIMIT
CURVES AT 100%,90%, AND
80%VOLTAGE,REPECTIVELY
E,F, ANDG ARE THE
SAFE STALL THERMALLIMIT
TIMES AT 100%,90%, AND
80%VOLTAGE,RE
PECTIVELY
E
F
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