MVPA/VPA Amplifier User Manual
Page 9 of 11
21015 V1.1
2.
SAFETY CONSIDERATIONS
The electrical installation of which the amplifier PowerBloc is part must
incorporate an all-pole mains isolating switch, with contact separation of at least
3mm.
The mains power supply cord to the amplifier unit must have conductor area at
least 1mm . The power cord must be BASEC or HAR approved with connectors
complying with EN60320 and must provide a safety earth.
Audix systems standby battery supply units (Models SBS241, SBS242, or
SBS481) all include a separate fuse on each 24V dc output. The fuse rating on
the feed to a 240 Watt amplifier should be 25A anti-surge (T25AH)
Where a 24V DC standby supply is connected, the DC feed to the amplifier
should be fused at source with a supply fuse rating of 25A anti-surge (T25AH).
The amplifier should not be exposed to dripping or splashing and any liquids.
2.1 Safety Considerations for System Maintenance
Only a qualified and trained electronics engineer should be permitted to
make any type of adjustment or repair to the Public Address or Voice
Alarm System.
The following safety factors should be considered before attempting to maintain
or repair an amplifier
•
Electrical
•
Heat
•
Weight
2.2
Electrical Hazards
High Voltages
exist within this apparatus:
•
230 volt mains
•
100V line
An power / frame primary supply is 230v AC 50-60Hz. This is connected by
means of an IEC fused inlet. This equipment does not include a mains isolation
switch therefore the:
Mains must be disconnected from the apparatus before any part of the
casing is removed.
Insulated shrouds protect the mains supply within the apparatus. No part of the
mains supply can be easily touched unless these internal covers are removed.
Battery Backup
Where the amplifier has a secondary supply i.e. 24Volt Battery backup:
