Generac Power Systems Nexus smart, Technical Manual

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5
NOTE:
It will be necessary to determine the order of “shedding” the
connected loads and connect the loads to the LSM in that order.
One is the highest priority and four is the lowest priority.
2.6 AUXILIARY CONTACTS
If desired, there are Auxiliary Contacts on the transfer switch to
operate customer accessories, remote advisory lights, or remote
annunciator devices. A suitable power source must be connected
to the COMMON (C) terminal. See Figure 2.3.
Contact operation is shown in the following chart:
Switch Position
Utility Standby
Common to Normally Open Open Closed
Common to Normally Closed Closed Open
NOTE:
Auxiliary Contacts are rated 10 amps at 125 or 250 volts AC.
DO NOT EXCEED THE RATED VOLTAGE AND CURRENT OF THE
CONTACTS.
Figure 2.3 – 400A Switch Auxiliary Contacts
Side views shown in Utility position
Y w
ir
e
Y wire
0 Ground
194 +12V
23 Transfer
T1
NEUTRAL
AIR 1
AIR 2
CONTACTOR
1
CONTACTOR
2
CONTACTOR
3
CONTACTOR
4
Priority 1
Priority 2
Priority 3
Priority 4
0 Ground
194 +12V
23 Transfer
T1
NEUTRAL
AIR 1
AIR 2
CONTACTOR
1
CONTACTOR
2
CONTACTOR
3
CONTACTOR
4
Priority 1
Priority 2
Priority 3
Priority 4
Contactor #1 Load #1
Supply
Coil wires
Contactor #2 Load #2
Supply
Contactor #4 Load #4
Supply
Contactor #3 Load #3
Supply
Figure 2.2 — Load Shed Module Connections
Installation