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When working on or using this type of equipment, the following precautions should be noted:
· Install, service, and operate equipment only by professional, 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.
· Multiple AC inputs may be present to equipment. Make sure that the appropriate circuit
protection device for each AC input being serviced is disconnected before servicing the
equipment.
· Disconnect batteries from outputs and/or follow safety procedures while working on equipment.
Batteries may be connected in parallel with the output of the rectifiers. Turning off the rectifiers
will not necessarily remove power from the bus.
· High leakage currents may be possible on this type of equipment. Make sure the equipment is
properly safety earth grounded before connecting power.
· Exercise care and follow all safety warnings and practices when servicing this equipment.
Hazardous energy and voltages are present in the unit and on the interface cables that can shock
or cause serious injury. When equipped with ringer modules, hazardous voltages will be present
on the ringer output connectors.
· Do not disconnect permanent bonding connections unless all power inputs are disconnected.
· Load cables must be sized in accordance with the cable lengths shown in Table 2 - A and Figure 2 - 1
to keep interrupt currents less than the ratings of DC protectors used in distribution panels, as
shown in Table 2 - B.
Precautions
*This configuration is not recommended
Figure 2 - 1: Short Circuit Current Calculations
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