48
4.
Select Stop Option to
N. OPEN
(Normally Open).
5. Press
PREV SCREEN
.
6. Press
the
INIT
Button. The test set closes the 52
A
contacts, and opens the 52
B
contacts. Each time the relay closes it’s contacts the reclose time is recorded
and displayed. The test set delays the contacts for approximately 800 ms
between each operation.
7.
When the relay goes to lock out, the test is stopped and the total number of
operations is displayed including operating times.
DC RELAY:
For a procedure on testing dc target and seal-in coils, see
DC TARGET AND SEAL IN
under
OVERCURRENT RELAY Test
. From the
TEST MENU
Screen, select
DC
RELAY
. The following test screen should be displayed.
Connect DC potential coil to the DC AUX output terminals.
If the relay has contacts to monitor, connect them to the
STOP/MONITOR
gate.
Pickup and Drop Out Test:
(DC Voltage Relays)
1. Turn
the
DC AUX
output
ON
.
2.
Rotate Control Knob and increase voltage until the
TRIP
LED turns
ON
(if over
voltage), or turns
OUT
if under voltage.
3.
Read and record the Pick-up voltage. Reduce the voltage (for over voltage
elements) until the trip contacts just open, read and record the drop out voltage.
4.
Return output to zero, press the
DC AUX
Button to turn OFF DC Voltage.
Summary of Contents for SR-98
Page 93: ...87...
