Woodward 9907-026, Product Manual

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Manual 02029 Load Sharing Module (Analog Output)
Woodward 5
Chapter 2.
Installation
Mounting
Figure 1-2 is an outline drawing of the Load Sharing Module. Mount the unit near
the electronic speed control. It may be mounted in any position. Provide
adequate ventilation for cooling and space for installation and servicing. Ambient
temperature must be between –40 and +75 °C (–40 and +167 °F).
Electrical Wiring
Figure 1-3 is the plant wiring diagram for the Load Sharing Module. This drawing
shows the connections that must be made to this unit, but does not show the
actual wiring for a particular system. For this information, see the plant wiring
diagram for your specific system. Woodward manual 25070,
Electronic Control
Installation Guide , also contains general information on wiring for electronic
controls.
Some of the wiring to the Load Sharing Module must be shielded, twisted-pair.
These wires are shown in Figure 1-3. The shielding prevents the wires from
picking up stray signals which could cause erratic control operation. Ground the
shield to the system common as shown in the plant wiring diagram (pin 12 on this
control). The shield on a length of shielded wire must be connected to common
at one end only; do not ground the shields on both ends of a wire. Do not run a
shielded wire inside a conduit with a wire which is carrying high current. Do not
attempt to tin the braided shields.
Make all wiring connections with insulated terminals.
Power Supply
There are no separate power connections to the Load Sharing Module; the unit
takes its power from the potential transformer connections.
Output
Connect the wiring between the output of the Load Sharing Module and the
auxiliary input of the speed control. Use twisted-pair, shielded wire.
Current Transformers (CTs)
Connect the wiring from the current transformers as shown in the plant wiring
diagram. This shows normal current sensing connection using three CTs. Figure
2-1 shows an open delta connection, an alternate method of current sensing
using only two CTs.