RESULTS: In relays with Sensing Input Range 2, the OVER PICKUP indicator is illuminated as well as
the timed and instantaneous overvoltage test indicators. In units with Sensing Input Range 3 or 4, all
pickup and test indicators will be extinguished.
Table 5-1. Output Terminals
Relay Model
Pickup Function
27 59 27/59
—
Timed Undervoltage 1-10 2-10
—
Instantaneous Undervoltage 2-10 12-13
—
Timed Overvoltage 1-10 1-10
—
Instantaneous Overvoltage 2-10 11-13
NOTE
Steps 2 through 4 apply only to units with Sensing Input Range 2.
Step 2. Slowly decrease the T1 voltage until the OVER PICKUP indicator and the timed and
instantaneous overvoltage test indicators extinguish. Slowly increase the T1 voltage until the
OVERVOLTAGE PICKUP indicator and the timed and instantaneous overvoltage test
indicators illuminate. Record the voltage.
RESULT: This voltage is between 39.2 and 40.8 Vac.
Step 3. Turn the timed and instantaneous OVERVOLTAGE PICKUP controls fully CCW. Slowly
decre
ase the T1 voltage until the OVERVOLTAGE PICKUP indicator and the timed and
instantaneous test indicators extinguish.
Step 4. Slowly increase the voltage at T1 until the OVERV
OLTAGE PICKUP indicator and the timed
and instantaneous overvoltage test indicators illuminate. Measure and record the voltage.
RESULT: This voltage is between 0.5 and 1.5 Vac.
This concludes the pickup test for units with
Sensing Input Range 2.
NOTE
Steps 5 and 6 apply only to undervoltage functions.
Step 5. Slowly decrease the voltage at T1 until the UNDER PICKUP indicator and the timed and
instantaneous test indicators illuminate. Measure and record the voltage.
RESULT: The voltage is between 53.9 and 56.1 Vac for Sensing Input Range 3 or between 107.8 and
112.2 Va
c for Sensing Input Range 4.
Step 6. Increase T1 voltage to 170 Vac for Sensing Input Range 3 or 330 Vac for Sensing Input
Ran
ge 4. Turn all undervoltage pickup controls fully CW. Slowly decrease T1 voltage until
the UNDER PICKUP indicator and timed and instantaneous undervoltage test indicators
illuminate. Measure and record the voltage.
RESULT: This voltage is between 156.8 and 163.2 Vac for Sensin
g Input Range 3 or between 313.6
and 326.4 for Sensing Input Range 4.
This concludes the pickup test for the unde
rvoltage functions.
NOTE
Steps 7 and 8 apply only to overvoltage functions.
9170600990 Rev H BE1-27/59 Testing 5-3
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