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3 SETUP AND USE
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5
RTD BIAS CURVE MAXIMUM
VALUE = XXX C
Not seen when RTD bias is defeated. This code sets the RTD bias maximum value (see figure 3-4):
0-200 - RTD bias maximum value in degrees C.; Factory Value = 190
5
DEFEAT U/B INPUT TO
THERMAL MEMORY ? XXX
(model 169 Plus only) This code is used to defeat or enable the unbalance bias function. With this
feature defeated the effect of negative sequence unbalance is not included in the thermal memory:
YES - Unbalance bias defeated, thermal memory affected by average of three phase currents.
NO - Unbalance bias enabled, thermal memory affected by equivalent motor heating current (including
negative sequence contribution).
Note: This setpoint should not be changed to NO until the 169 Plus relay has learned a value for
K. The learned K factor is used to bias the thermal memory as explained in section 3.20. The
learned K value can be examined in ACTUAL VALUES mode, page 6.
Factory Value = YES
5
DEFAULT K VALUE = XX
(OFF selects learned K)
Seen only when U/B input to thermal memory is enabled (model 169 Plus only). This setpoint is used to
select a value for the negative sequence unbalance K factor (see section 3.20):
1-19 (increments of 1) or OFF - OFF indicates learned K value is to be used. Factory Value = 6
5
DEFEAT LEARNED
COOL TIME ? XX
(model 169 Plus only) This code is used to tell the 169 relay to use the learned motor cooling time
values. These times can be examined in ACTUAL VALUES mode, page 6. When learned values are
not used, the user entered default times will be used:
YES - Relay uses default cool times; NO - uses learned cool times from page 6 of ACTUAL VALUES
Note: This setpoint should be set to "YES" (relay uses default cool times) until the 169 relay has
learned reasonable motor cooldown times.
Factory Value = YES
5
ENTER RUNNING
COOL TIME = XXX MINUTES
Not seen if cooldown time learned values are used. This code is seen when the learned motor cooling
times are not used. This value represents the time for the thermal memory to discharge from 100% to
0% with the motor running in a non-overload condition:
1-45 - cooling time in minutes; Factory Value = 15
g
51
GE Power Management
- Quick Links:
- 169 Relay Features
- Trip/Alarm Mode
Hide quick links:
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