Date Code 20080110 Testing and Troubleshooting 10-39
SEL-387E Instruction Manual
Step 11.
Purpose: Verify the Level 2 Volts/Hertz delay setting, when
24CCS = DD
and
24D2D1 < 24D2D2
.
Method: Execute the
SHOWSET
command via the relay front panel or serial port
and verify the setting (i.e.,
SHO 24CCS <Enter>
,
SHO 24D2D1
<Enter>
).
24CCS
should be set to
DD
;
24D2D1
should be less than
24D2D2.
Step 12.
Purpose: Display the appropriate Relay Word bit on the front-panel LEDs.
Method: Execute the
TARGET
command (i.e.,
TAR F 24C2T <Enter>
). The
SEL-387E Relay now displays the state of the volts/hertz elements on the
bottom row of front-panel LEDs.
Step 13.
Purpose: Apply balanced three-phase voltage and change the voltage until the
appropriate LED illuminates.
Method: Apply balanced three-phase voltages as shown in
Figure 10.5. Change the
voltage to a value above the
24D2P1
setting. The
24C2T
LED should
illuminate
24D2D1
seconds later, within ±0.1% of setting ±4.2 ms (at 60
Hz).
Step 14.
Purpose: Verify the Level 2 volts/hertz delay setting,
when
24CCS = DD
and
24D2D2 < 24D2D1
.
Method: Execute the
SHOWSET
command via the relay front panel or serial port
and verify the setting (i.e.,
SHO 24CCS <Enter>
,
SHO 24D2D2
<Enter>
).
24CCS
should be set to
DD
;
24D2D2
should be less than
24D2D1
.
Step 15.
Purpose: Display the appropriate Relay Word bit on the front-panel LEDs.
Method: Execute the
TARGET
command (i.e.,
TAR F 24C2T <Enter>
). The
SEL-387E Relay now displays the state of the volts/hertz elements on the
bottom row of front-panel LEDs.
Step 16.
Purpose: Apply balanced three-phase voltage and change the voltage until the
appropriate LED illuminates.
Method: Apply balanced three-phase voltages as shown in
Figure 10.5. Change the
voltage to a value above the
24D2P2
setting. The
24C2T
LED should
illuminate
24D2D2
seconds later, within ±0.1% of setting ±4.2 ms (at 60
Hz).
Step 17.
Purpose: Verify the Level 2 volts/hertz delay settings, when
24CCS = ID
.
Method: Execute the
SHOWSET
command via the relay front panel or serial port
and verify the setting (i.e.,
SHO 24CCS <Enter>
).
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