AMS Neve 88D, User Manual

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AMS Neve Power Supply Safety Information Issue 2
Important Safety Information
All AMS Neve equipment is Class I type equipment which means it must have a good earth connection for it to be
operated safely. A good earth is one designated as such by the local power distribution company.
This equipment and its power supplies have been tested for use on TN type power systems (source of energy directly connected with earth, installation’s
exposed parts connected to source earth). This is a type of power system where the Neutral is guaranteed to be connected to the Earth by the electricity
supply company. TN power supply systems are normal in the UK and Germany.
Exposed
Conductive Parts
Exposed
Conductive Parts
Local
equipment Earth
Power System
Earth
Power System
Earth
Example of TN Power System
Example of IT Power System
Impedance
In Scandinavian countries and in some rural areas of France and Belgium IT type power supplies are found (source isolated from earth or through
an impedance, installation earthed locally). It is possible that serious safety hazards would exist if this equipment were operated directly from an IT
power supply. Measures, such as the use of an IT rated UPS, can be taken in order to operate the equipment safely. If you are in any doubt your local
Electricity company should be able to offer advice on this subject.
High Earth Leakage Current
Some AMS-Neve equipment is designated ‘high earth leakage current’ ( >3.5mA). This is generally true of all the larger digital consoles and where it is
essential to use the separate earth terminals provided on the equipment to ensure safety. Information and labelling are supplied with each product
where this is necessary.
Installation Instructions
An equipment grounding conductor that is not smaller in size than the ungrounded branch circuit supply conductor is to be installed as part of the branch
circuit that supplies the equipment. Bare, covered or insulated grounding conductors are acceptable. Individually covered or insulated equipment
grounding conductors shall have a continuous outer finish that is either green, or green with one or more yellow stripes. The equipment grounding
conductor is to be connected to the ground at the service equipment.
The attachment plug receptacles in the vicinity of the equipment are all to be of a grounding type, and the equipment grounding conductors serving
these receptacles are to be connected to earth ground at the service equipment.
Equipment with High Earth Leakage at 12th July 1999 :
Capricorn console control surface.
Capricorn DSP rack.
Libra family console control surface.
Logic family and DFC console control surface.
Contact AMS Neve Customer Support Department if you have any doubts on earthing requirements.
Equipment Isolation and Redundant Power Supplies
Where power is supplied to equipment via IEC mains inlets these must be removed prior to servicing in order to maintain safety. The mains switches
MUST NOT be used as a safety isolation device.
Products with redundant power supplies generally have multiple IEC mains inlets. Where this is the case it is essential to remove
ALL IEC inlets to fully
isolate the equipment. Information and labelling are supplied with each product where this is necessary.
Caution
To reduce the risk of electric shock, plug each power supply cord into separate branch circuits employing separate service
grounds.