Precautions - ABB CPS3200U Product Manual

Precautions

When working on or using this type of equipment, the following precautions should be noted:
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This unit must be installed, serviced, and operated only by skilled and qualified personnel who have the necessary
knowledge and practical experience with electrical equipment and who understand the hazards that can arise when
working on this type of equipment.
•
The equipment could be powered by multiple dc inputs. Ensure that the appropriate circuit protection device
each dc input is disconnected before servicing the equipment. Do not disconnect permanent bonding provisions
unless all dc inputs are disconnected.
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DC inputs may be connected in parallel to power the dc-dc converters. Disconnecting one dc input will not
necessarily remove power from the bus. Make sure all battery power sources are also disconnected and/or follow
safety procedures while working on any equipment that contains hazardous energy/voltage.
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Hazardous energy and voltages are present in the unit and on the interface cables that can shock or cause serious
injury. Follow all safety warnings and practices when servicing this equipment. When equipped with QS982A
modules, hazardous voltages (+/-190Vdc) will be present on the output connectors and associated interconnection
cables.
In addition to proper job training and safety procedures, the following are some basic precautions that
should always be used:
•
Use only properly insulated tools.
•
Remove all metallic objects (key chains, glasses, rings, watches, or other jewelry).
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Wear safety glasses. Fuses can produce sparks. High energy levels on buses and distribution components can
produce severe arcing.
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Do not rely on simple volt meter tests to determine if the +/-190V output circuit is off line. Physically break the
circuit by removing the associated QS982A converter before touching the +/-190V RFT-V circuit. Confirmation
test each circuit for 5 seconds before touching. In some line fault modes, power is cycled on every 4 seconds. The
presence of a fault may make it difficult to determine if the circuit is online. Always physically break the circuit.
•
Lock out and tag circuit breakers/fuses when possible to prevent accidental turn on.
•
Be aware of potential hazards before servicing equipment.
•
Identify exposed hazardous electrical potentials on connectors, wiring, etc. (note the condition of these circuits,
especially wiring).
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Use care when removing or replacing covers; avoid contacting circuits.
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