L-828 CCRs LC-Type (4, 7.5, and 10 kW/6.6 A/60 Hz)

Description

Overcurrent Protection

Maximum Safe Overload

Input Voltages

Built-In True RMS-Reading Ammeter

Input Wire Size

Temperature Rise

10kW regulators include an overcurrent protective device that opens the primary switch when the output current exceeds the 100 percent current (6.6 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.

Maximum safe overload is 8.5%. Refer to Table 2-9.

 

Table 2-9 Maximum Safe Overloads

Rating

 

Safe Overload

4 kW

 

4340 W

7.5 kW

 

8137 W

10 kW

 

10,850 W

The standard power transformer for the L-828 regulators is designed for an input voltages of 208, 220, 240, or 480 Vac. The 240 Vac has a field-adjustable tap. See the name plate on the regulator for the input voltage rating.

Input voltage is single phase 60 Hz ac. 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.

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 2-4.

The temperature rise of the transforming portion of the regulator is in accordance with ANSI C57.12.91 for air-cooled regulators.

2002 Siemens Airfield Solutions, Incorporated

96A0104B

Page 2-9

All rights reserved

Issued 6/02

 

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Siemens L-828 manual 4340 W

L-828 specifications

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