3-
56
269Plus Motor Management Relay GE Power Management
OVERLOAD CURVE SETPOINTS 3 SETUP AND USE
3
Protection of a motor with a service factor that is not 1.0 may use the
OVERLOAD PICKUP LEVEL
setpoint to
ensure the overload curve does not pick up until the desired level. This setpoint determines where the overload
curve picks up as a percent of FLC; it effectively cuts off the overload curve below the setpoint x FLC.
If one of the standard curves is desired for the given application, then the
CUSTOM CURVE?
setpoint should be
NO
. In this case, the desired curve can be chosen from one of the eight standard curves. If a different curve is
required, then the
CUSTOM CURVE?
setpoint should be
YES
. In this case, the following lines in the setpoints page
will be the choice of breakpoints as shown in Section 3.5. These points should be entered and checked care-
fully since motor overload protection will be largely based on the chosen curve.
After a standard curve has been chosen, the numerical values for the breakpoints can be viewed by storing a
YES
for the
CUSTOM CURVE?
setpoint and then examining the next few lines of setpoint values. The overload
levels and trip times are shown in Table 3–5: STANDARD OVERLOAD CURVE TRIP TIMES (IN SECONDS)
on page 3–56.
If a new standard curve number or custom curve point is stored while the motor is running,
the new curve or point will not come into effect until the motor has stopped.
Table 3–5: STANDARD OVERLOAD CURVE TRIP TIMES (IN SECONDS)
OVERLOAD
LEVEL
GE POWER MANAGEMENT CURVE NUMBER
1 2 3 4* 5 6 7 8
1.05 853 1707 2560 3414 5975 7682 10243 12804
1.10 416 833 1249 1666 2916 3749 4999 6249
1.20 198 397 596 795 1391 1789 2385 2982
1.30 126 253 380 507 887 1141 1521 1902
1.40 91 182 273 364 637 820 1093 1366
1.50 70 140 210 280 490 630 840 1050
1.75 42 84 127 169 296 381 508 636
2.00 29 58 87 116 203 262 349 436
2.25 21 43 64 86 150 193 258 322
2.50 16 33 49 66 116 149 199 249
2.75 13 26 39 53 92 119 159 198
3.00 10 21 32 43 76 98 131 163
3.50 7 152330546992115
4.00 5 11172340526987
4.50 4 9 13 18 31 40 54 67
5.00 3 7 10 14 25 32 43 54
5.50 2 5 8 11 20 26 35 43
6.00247917222936
6.50246814182430
7.00135712162127
7.50134610131822
8.0012359111519
* Factory preset value.
NOTE
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