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User Manual
Rev. 1.0 - 29/11/05
PTRL NV/3 & RXRL NV/3
5.5.1 Notes on the batteries and their connection
Any type of lead batteries with 24 V nominal voltage in a broad range of capacities
may be used. Pricing and performance considerations suggest the use of sealed or
normal batteries.
Normally, sealed batteries are well suited for small-size systems with 20-40 Ah
capacity. Standard automotive batteries provide a low-cost alternative for larger
capacities (40 to 100 Ah or higher). In the latter case, we strongly recommend installing
these batteries in a well-ventilated place, as the charging process produces acid
gas which may damage electronic components and
the hydrogen generated by
the hydrolysis process may create an explosive atmosphere
if it is not removed.
The terminals of 2 or more PTRL&RXRL NV/3 systems may be connected in parallel
to the same battery assembly, as long as all internal regulators are properly set to
28.6±0.1V (factory setting). In this case the power supply units will operate in parallel,
which benefits system redundancy, and both will provide a higher charging current
than they would supply individually.
Lead batteries are typically rated 12V; this application requires two such 12V batteries
connected in series. Use cables with adequate thickness to connect the batteries to
each other and to the units. Normally, 1 sq mm wires will suffice; larger cross-section
areas may be required if wiring connections span long distances.
Ensure the batteries can supply the system for the maximum expected
duration of mains failure events. Do not let the batteries run flat or permanent
damage may result. The battery controller disconnects the batteries when
voltage drops below 22V; however, the control circuits will draw a test current
of about 10-15mA during a mains failure event. However low, such current
draw can drain the batteries over time in the event of prolonged mains failure.
To avoid draining the batteries, disconnect them if the equipment is to remain
powered off or disconnected from the mains for prolonged periods of time.
5.5.2 Estimated battery life
Battery installation and life are not covered in this manual; do not underrate this matter
and refer to specific literature and to the battery manufacturer instructions. Thanks to
the incorporated battery charger, for most applications the user will simply need to
provide the external batteries with a little extra cost.
Following are a few suggestions:
- Choose batteries with minimum current capacity at least 4 up to 10 times average
current draw,
Summary of Contents for PTRL NV/3
Page 1: ...PTRL NV 3 RXRL NV 3 User Manual Volume 1 Manufactured by Italy...
Page 4: ...PTRL NV 3 RXRL NV 3 ii User Manual Rev 1 0 29 11 05 This page was intentionally left blank...
Page 8: ...4 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 This page was intentionally left blank...
Page 55: ...51 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 10 Ensemble View 10 1 PTRL NV 3...
Page 56: ...52 52 User Manual Rev 1 0 29 11 05 PTRL NV 3 RXRL NV 3 10 2 RXRL NV 3...