Emerson Static Transfer Switch To configure the setpoints for each source, Sepoint parameters

Liebert STS2 Touch Screen Display

To configure the setpoints for each source:

1.Select SOURCE 1/2 Set Points from the User Settings dialog box. The Source 1/2 Set Points dialog is displayed.

Figure 54 Source setpoints

2.Select 1 to configure the settings for Source 1.

3.Configure the settings using the keypad or dialog box that is displayed when you touch a button.

Table 13 Sepoint parameters

Button	Range	Default	Comments
Fast UV Setting (%)	-10 to -30% of Nominal	-20%	Set in increments of 1%.
	voltage rating
Slow UV Setting (%)	-5 to -20%	-10%	Set in increments of 1%.
Slow UV detection delay	1-60 cycles	5 cycles	Units: Line Cycle
OV Setting (%)	+5% to +20%	+10%	Set in increments of 1%.
OV Detection Delay	1-255 cycles	3 cycles	Units: 1/4 Line Cycle
	0 – 3.0 multiplied by	1.5 * Unit	I-peak xfer lockout detection point.
I-PK Xfer Lockout			Units: Amps RMS. Select the HI or LO
	the unit current rating.	Current Rating
			buttons to configure your setting.

4.Select 2 for Source 2.

5.Configure the settings, as described in Step 3.

6.Select SAVE to keep the settings for both sources.

The Set Points dialog is closed and the User Settings dialog is displayed.

7.Select MANUAL MAX XFER PHASE ANGLE. A keypad is displayed.

This setting configures the maximum allowed phase difference between the sources and applies to all manual transfers as well as any auto retransfer.

a.Configure this setting with a range of ± 1-30 degrees.

The default setting is ±15 degrees and the resolution is 1 deg.

b.Select OK to save the setting.

The setting is now displayed in the adjacent field in the User Settings dialog box.

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