Emerson 260, 600 A, 400 manual Manual Operation Test, ATS Position Handle Indicators

INSTALLATION (continued)

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.

1.After deenergizing both power sources, open the enclosure door. Locate and remove the mainte- nance handle from the clips on the left side of the transfer switch frame. Insert the handle into the hole in the molded hub on the left side of the operator. See Figures 1–2 and 1–3 and Table B.

2.Move the maintenance handle up or down as shown to manually operate the transfer switch. It should operate smoothly without any binding. If it does not, check for shipping damage or construction debris.

3.Return the transfer switch to the Normal position. Observe that the window indicators (right side) show the top shaft O (open) and the bottom shaft C (closed).

Table B. Maintenance handle positions.

ATS Position		Handle	Indicators
	E	up	E = O
Normal			upper contacts open
			N = C
	N
			lower contacts closed
	E		E = C
Emergency			upper contacts closed
			N = O
	N	down	lower contacts open

Note: If Normal and Emergency connections are

reversed this operation is also reversed.

left side of

transfer switch

maintenance

handle

storage clip

Figure 1-2. Maintenance handle and its storage clips.

4.Remove the maintenance handle and store it on the frame (left side) in the clips provided.

Verify that the maintenance handle has been removed before proceeding!

Now continue to 2 – Voltage Checks on next page.

	UP closes the	Emergency
handle		contacts
	Normal source
		window
	contacts (lower)
		indicators	contact position
hub	DOWN closes the	O is open	indicators (right side)
	Emergency source	C is closed
	contacts (upper)	Normal
frame
		contacts

Figure 1-3. Maintenance handle operation and contact position indicators.

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