INSTALLATION (continued)
Functional Test
The Functional Test consists of three checks: manual operation, voltage checks, and electrical operation.
Do these checks in the order presented to avoid damaging the automatic transfer switch.
Read all instructions on the Wiring Diagram and labels affixed to the automatic transfer switch. Note the control features that are provided and review their operation before proceeding.
1 – Manual Operation Test
A detachable maintenance handle is provided on the frame of the Transfer Switch for maintenance purposes only. Manual operation of the transfer switch should be checked before it is energized (operated electrically).
Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.
Turn counterclockwise to Emergency.
Turn clockwise |
| Grasp | |
| handle | ||
to Normal. |
| ||
insert | firmly | ||
| |||
|
| ||
slide hub | handle |
| |
into hole |
| ||
onto shaft |
| ||
|
|
Figure 1-3. Maintenance handle.
1.After deenergizing both power sources, open the enclosure door. Locate and remove the mainte- nance handle and hub stored on the transfer switch frame. Then install the hub onto the center operator shaft and insert the handle firmly into the hole in the side of the hub (spring fully compressed). See Figure
2.If the transfer switch is closed on Normal (window shows CLOSED), grasp handle firmly and turn it counterclockwise. The transfer switch should operate smoothly without binding. If it does not, check for shipping damage or construction debris.
Table B. Maintenance handle positions.
ATS Position | Indicators | |
| E | OPEN |
Normal |
| upper contacts open |
| CLOSED | |
| N | |
| lower contacts closed | |
|
|
|
| E | CLOSED |
Emergency |
| upper contacts closed |
| OPEN | |
|
| |
| N | lower contacts open |
|
|
|
3.Turn the handle clockwise to return the transfer switch to the Normal position. Observe that the window indicators (left side) show the top shaft OPEN and the bottom shaft CLOSED.
Note: If Normal and Emergency connections are
reversed this operation is also reversed.
4.Remove the maintenance handle and hub and store it on the frame in the place provided.
Verify that the maintenance handle has been removed before proceeding!
Now continue to 2 – Voltage Checks on next page.
Emergency contacts
window
indicators
OPEN or
CLOSED
Normal
contacts
contact position
indicators (left side)
counterclockwise DOWN closes the Emergency source contacts (upper) and opens the Normal source contacts (lower)
clockwise DOWN closes the Normal source contacts (lower) and opens the Emergency source contacts (upper)
