Hubbell LX-440 - Manual (Page 13)

Transfer Switch
Page 13 of 16 Pages
Components
1. Transfer Control Relay
Controls whether the automatic transfer switch is in the normal or the emergency position.
De-energized - automatic transfer switch in Normal position
Energized - automatic transfer switch in Emergency position
2. Timer circuit (not used on assembly –101 and -104)
This circuit determines how long the automatic transfer switch stays in the neutral position. Jumper
JMP1 selects one of four ranges.
Potentiometer P1 adjusts the time within that range. The four ranges are:
1–6 seconds 20–120 seconds
5–30 seconds 100–600 seconds
3. Manual Disconnect Switch (not used on assembly -103)
Opening this switch disconnects power from the control transformers to the switching mechanism.
Then the transfer switch can only be switched manually using the handle.
Assembly versions
For LX-450
49271-101 No timer with MDS.
49271-102 Includes timer and MDS.
49271-104 No timer with MDS and monitor for AUTO/MANUAL switch.
49271-105 Includes timer, MDS, and monitor for AUTO/MANUAL switch.