The insulation resistance must be measured on de-energised con-
trol cables.
Personnel:
n
Qualified electrician for high and
medium voltage
Protective equip-
ment:
n
Protective clothing
n
Industrial safety helmet
n
Protective gloves
n
Safety footwear
n
High-vis clothing
Tool:
n
Hand tools
n
Megohmmeter
1.
De-energise the control cable at both ends and secure it
against re-connection.
2.
NOTICE!
Property damage due to improper proce-
dure!
Disconnect the wires of the control cable from the TracFeed
®
SFA terminal box.
3.
Measure the insulation resistance between the individual
wires of a cable and against the earthing potential. Next,
measure the insulation resistance between the available
back-up wires and the other wires in the cable. To do this,
use a test voltage of 1 000 V with an insulation resistance
greater than or equal to 1 M
Ω
.
For this measurement, use a suitable meas-
uring device tested in accordance with
IEC 61557-3 (DIN EN 61577-3,
DIN VDE 0413-3).
4.
Log the measured values.
If cable distances of more than 1 000 m are
planned, multiple cable lengths are connected with
cable couplers. Before the cables are connected,
the insulation resistance of the individual cable
lengths must be measured. After the individual
cable lengths are connected, the insulation resist-
ance of the entire cable length must be measured
again. This procedure makes it easy to identify
insulation faults.
Measurement of the insulation
resistance
Assembly
Final checks > Electrical measurements and function tests
14.09.2022
TracFeed
®
SFA Electromechanical remote motor drive
52
Содержание 3EGF020333
Страница 72: ...Appendix Appendix 14 09 2022 TracFeed SFA Electromechanical remote motor drive 72...
Страница 89: ......
Страница 90: ...Rail Power Systems GmbH 2022...