C&D Technologies RS-990 Liberty Series 1000 User Manual
Page 14
12
SECTION 4 - ELECTRICAL CONNECTIONS
WARNING
• Always use protective insulating equipment, such as gloves,
shoes and eye and face protection. Wrenches and other tools
must be insulated.
• Observe local, state, and national electric codes at all times.
• Always work with the battery ungrounded. Battery ground
connections, if required, should be made last.
• To avoid working with high voltages, break the battery down
into convenient lower-voltage modules, i.e., equal to or less
than 48-Volts.
• Always maintain a firm grasp on tools and hardware when
working on the battery. Dropped hardware can cause a short
circuit, possibly resulting in serious personal injury and/or
damage to the equipment.
• Before working on the battery, be sure to discharge static
electricity that can build up on tools or the technician by touching
a grounded surface in the vicinity of the battery but far enough
away from the cells and flame arresters. Avoid creating sparks or
exposing cells to open flames that could ignite the gasses
produced by a charging battery.
4.1 Preparing electrical contacting surfaces
All electrical contacting surfaces must have a clean and electrolyte
free finish. Any tarnish or discoloration should be carefully removed.
Do not use steel brushes or other abrasive tools to clean the tin plated
battery posts and intercell connectors.
The posts and intercell
connectors are plated with a thin layer of tin. Cable lugs are tin
plated. It is important that the electro-plating must not be
damaged or removed.
1. With a dry cloth, remove any factory-applied grease or oil coating
from the contact surfaces or posts.
2. Brush the contacting surfaces of battery posts/terminals and
intercell connectors to a clean corrosion free finish using a
fine
brass plater’s wire brush (multiple 0.010 diameter brass wire
construction).
3. After brushing connections with a fine brass plater’s brush,
terminals and interface can be coated with NO-OX which prevents
oxidation between connections.