Note:
For most Alstom equipment with ring-t
erminal connections, the threaded terminal block for current transformer termination
is automatically shorted if the module is removed. Therefore external shorting of the CTs may not be required. Check the
equipment documentation and wiring diagrams first to see if this applies.
Caution:
Where ext
ernal components such as resistors or voltage dependent resistors (VDRs) are
used, these may present a risk of electric shock or burns if touched.
Warning:
Tak
e extreme care when using external test blocks and test plugs such as the MMLG,
MMLB and P990, as hazardous voltages may be exposed. Ensure that CT shorting links
are in place before removing test plugs, to avoid potentially lethal voltages.
4.9 UPGRADING/SERVICING
Warning:
Do not insert or withdraw modules, P
CBs or expansion boards from the equipment
while energised, as this may result in damage to the equipment. Hazardous live
voltages would also be exposed, endangering personnel.
Caution:
Internal modules and assemblies can be heavy and may hav
e sharp edges. Take care
when inserting or removing modules into or out of the IED.
Chapter 2 - Safety Information P14x
22 P14xEd1-TM-EN-1
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