Safety Tips For Handling Electronic Measurement Devices - ABB SCC-C Operator's Manual

Safety Tips for Handling Electronic Measurement Devices

Protective Lead
Connection
Risks of Loss of
Protective Lead
Continuity
Proper Operating
Voltage
Risks Involved in
Opening the Covers
Risks Involved in
Working with an
Open Instrument
Charged Capacitors
Use of Proper Fuses
When Safe Operation
can no Longer be
Assured
42/23-55 EN Rev. 1
The protective lead should be attached to the protective lead connector before
any other connection is made.
The instrument can be hazardous if the protective lead is interrupted inside or
outside the instrument or if the protective lead is disconnected.
The instrument voltage must be set to match the line voltage before the power
supply is activated.
Current-bearing components can be exposed when the covers or parts are
removed, even if this can be done without tools. Current can be present at some
connection points.
The instrument must be disconnected from all power sources before any mainte-
nance work is performed. Work on an instrument that is open and connected to
power should only be performed by trained personnel who are familiar with the
risks involved.
The instrument capacitors can retain their charge even when the instrument is
disconnected from all power sources.
Only fuses of the specified type and rated current should be used as replacements.
Never use patched fuses. Do not short-circuit the fuse holder contacts.
If it is apparent that safe operation is no longer possible, the instrument should be
taken out of operation and secured against unauthorized use.
The possibility of safe operation is excluded:
• If the instrument is visibly damaged
• If the instrument is no longer operational
• After prolonged storage under adverse conditions
• After severe transport stresses
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