TRENDnet Series 300 INSTALLATION continued, Functional Test, Manual Operation Test, ATS Position

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).

Turn counterclockwise to Emergency.

Turn clockwise		Grasp
		handle
to Normal.
	insert	firmly
slide hub	handle
onto shaft	into hole

Figure 1-3. Maintenance handle.

1.After deenergizing both power sources, open the enclosure door. Locate and remove the maintenance 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 1–3 and 1–4 and Table B.

!

Do not manually operate the transfer switch until both power sources are disconnected: open both circuit breakers.

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

2.If the transfer switch is closed on Normal (window shows CLOSED), grasp handle firmly and turn it counterclock- wise. The transfer switch should operate smoothly without binding. If it does not, check for shipping damage or construction debris.

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 and hub have 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)

Figure 1-4. Contact position indicators and maintenance handle operation.

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