Set Line Regulation - NSI DS12 Installation And Operation Manual

2.7 Set Line Regulation

This menu enables or disables the line regulation feature of the dimmer pack. Line regulation is a feedback system
that monitors the incoming line voltage, and attempts to compensate for surges or sags in the feeder voltage by
inversely dimming the output up or down, thereby maintaining a constant output voltage to the lamp. This feature
operates best when the incoming feed power voltage is about 125VAC. The dimmer pack then has the head room to
keep the lamps operating at their maximum voltage, even if the feed voltage sags or surges a few volts. The DS
dimmer pack should never be fed with line voltage above 130VAC, however, especially while operating in the non-
regulated mode.
Line regulation can be susceptible to operational problems on very soft or very unstable power feeds. For this
reason, the user has the ability to turn off line regulation from this menu. Although this may alleviate most power
feed interaction problems, it can not correct for poor installations with extremely soft and /or noisy feeders and
neutrals, from which can cause false triggering can occur due to false feeder zero cross information.
To change the line regulation setting, from the main menu:
NSI DSxx
STATUS=xxx [MORE]
press the key sequence [MORE], [MORE], [SETUP], [MORE], [MORE], [MORE], [MORE], [MORE],
[MORE], [MORE]. The following menu will be displayed:
SET LINE REG = ON
[OFF] [MORE]
The active line regulation setting will be displayed to the right of the equal sign, with the alternate option displayed
for the left soft key function (F1). To toggle the line regulation operation, press the (F1) function key. The new
setting will be stored in permanent EEPROM memory, and will automatically load on power-up.
NSI DS8/DS12 MODULAR DIGITAL DIMMING SYSTEM
Software Revision 1.1x, 8/24/99
xPHASE
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