IG-183-EN version 06; 31/03/2020
78
Maintenance
General instructions
cgm
.3 system: medium voltage SF
6
gas-insulated
cubicles up to 38 kV according to IEEE and CSA standards
7.2. Acoustic grounding prevention alarm test
To test that the
ekor
.sas acoustic alarm is working correctly,
connect the
ekor
.vpis voltage presence indicator to
110 V
ac
/ 230 V
ac
by means of 0.16 inches (4 mm) terminals,
which are connected to the indicator between the ground
test point and the test point for the L1 phase. The auxiliary
power supply is maintained for 5 minutes. As the handle is
moved to insert the lever in the grounding shaft in order
to carry out the operation, the alarm starts to sound and
continues to sound for at least 30 seconds. It stops when
the handle is released.
The
ekor
.sas alarm can be replaced if necessary, since it is
joined to the associated elements with two friction-fit PCB
connectors:
1.
3-pin connector, polarized for the voltage presence
indicator.
2.
2-pin connector for the lever microswitch.
The procedure is as follows:
1.
Remove the driving mechanism cover.
2.
Unscrew the
ekor
.sas unit to remove it.
3.
Undo both connectors and replace the damaged
unit; then connect it to the lever microswitch (2-pin
connector) and the voltage indicator (polarized 3-pin
connector).
Figure 7.2. ekor
.sas
unit device