Ferroresonant L-828/L-829 CCR Description
2009 ADB Airfield Solutions, Incorporated
96A0288T 2-14
All rights reserved Issued 9/04
Overcurrent Protection
Regulators 10kW and larger include an overcurrent protective device that
opens the primary switch when the output current exceeds the 100 percent
current (6.6 A or 20 A) by 5 percent. The device operates within 5
seconds after an overcurrent of 5 percent and within 1 second after an
overcurrent of 25 percent. The device resets within 2 seconds after the
control switch is turned off and re-energized. The overcurrent protection
cannot be activated by a momentary (0.25 second) overcurrent caused by
switching the load circuits and other transients.
Input voltage is single phase 60 Hz ac. Regulators 10 kW and larger
operate as required (see subsections Resistive Loading and Reactive
Loading in this section) when the input voltage is anywhere between 95
and 110 percent of the nominal value. The regulator is designed to
withstand momentary voltages up to 120 percent of nominal input voltage
without shutting off or being damaged by such overvoltage so long as the
duration of overvoltage excursions are not longer than 50 milliseconds and
do not occur more than once per minute.
For the L-828 only, a flush-mounted true rms-reading ammeter mounted
on the front of the input module PCB indicates the output current. The
meter accuracy is +3.0 percent of the maximum output current.
Refer to Table 2-3.
Table 2-10 Rating and Input Voltage
The temperature rise of the transforming portion of the regulator is in
accordance with ANSI C57.12.91 for air-cooled regulators.
Built-In True RMS-Reading
Ammeter
To Next Page
Loading...
Need help?
General