Table of Contents
Advertisement
If the LVD functionality is not required, the load must still be connected to the Load connection (not directly onto
the battery).
It is recommended that two wires are run in parallel for both the +v and –v Battery and Load connections. 14
AWG wire should be used for the connectors. In situations where voltage drop is a concern, then a short length of
14 AWG wire should be used from the SPS, connecting to a longer length of large cross section wire.
Connectors supplied for the SPS are 4W Lumberg screw connectors. Each terminal on the connector is rated at 20
Amps at 50° C.
To connect cable to Lumberg connector, strip back cable insulation approximately 1/4", insert into connector and
tighten screw.
2.4
Temperature Compensation
Temperature Compensation Probes are available in different lengths. The end of the Temperature Compensation
Probe should be attached to a terminal on a battery (the lug is isolated, so it doesn't matter which terminal). Any
excess cable should be neatly coiled. As the current in the Temperature Compensation Probe is minimal, it does
not matter if the cable is longer than necessary (unlike the current carrying load and battery cables).
Warning
Do not reverse poloarity of the cables from the battery. This will blow an internal protection fuse, requiring the
SPS to be returned for servicing.
Do not connect the Temperature Compensation Probe to the Site Power System until commissioning see Section 2.7
- Start-Up.
2.5
Multiple Units
The SPS may be operated in parallel to provide greater current capability and to provide redundancy.
When SPS connected in parallel (and load sharing), alarm outputs on the rectifiers give the status of all the units.
This means that you only need to connect one alarm card to the alarm circuitry when the rectifiers are connected
in parallel.
The load and battery cables should be wired in parallel to the rectifiers as per the diagram in section 2.3. Each SPS
should be fitted with a Temperature Compensation Probe connected to the same terminal on the same battery.
For load and alarm sharing, an alarm and control interface cable should be connected to each parallel SPS to
ensure that all units load share automatically. When two or more units are connected in parallel, then you can
use a simple RJ45 double adaptor to daisy chain the connection cable (max 6 rectifiers).
Any fuses or circuit breakers on the output of the rectifier must be placed after the SPS outputs have been
connected together.
2.6
Internal Alarm Card
Two six position, green screw style connectors are provided for making alarm card wiring connections. The alarm
card provides voltage free relay contacts in the event of:
• AC failure
• Rectifier failure
• Rectifier In Shut-Down Mode (over temperature, over voltage, current limit)
• High voltage output
• Low voltage output
P.O. Box 1306
Newport Beach
California 92663
Phone: 714-751-0488
Fax: 714-957-1621
E-Mail: techservice@newmarpower.com
7
Advertisement
Table of Contents
