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IB00405004E-70-8664 For more information visit: www.eaton.com
Instructional Booklet
Effective: June 2007 Page 7
Instruction Manual for the Eaton RTC-50
Automatic Transfer Switch Controller
SECTION 4: PROGRAMMING
4.1 Introduction
The RTC-50 controller is programmable via the two programming
jumpers shown in Figure 2.
The TDNE jumper enables the end-user to select a Time Delay Nor-
mal to Emergency setting of either 20 seconds or 50 seconds.
TDNE is a time delay that starts timing when the Generator source
becomes available either after the Utility becomes unavailable or
after the Go To Generator input is activated. The 50 second set-
ting may be used to allow for a longer warm-up period of the Gen-
erator.
The FREQ jumper enables the end-user to program the RTC-50 for
an operating frequency of either 50 or 60 hertz.
Figure 2. RTC-50 Programming Jumpers.
Table 2 is a summary of the Fixed and Jumper-selectable settings that are available in the RTC-50.
Table 2. Fixed and Jumper-Selectable Settings
DESCRIPTION RANGE FACTORY DEFAULT FIXED/JUMPER
Time Delay Normal to Emergency 20 or 50 seconds 20 seconds Jumper-selectable
Time Delay Emergency to Normal 10 seconds 10 seconds Fixed setting
Time Delay Emergency Fail Timer 6 seconds 6 seconds Fixed setting
Nominal Frequency 50 or 60 Hz 60 Hz Jumper-selectable
Nominal Voltage 240 Vac 240 Vac Fixed setting
Utility Undervoltage Dropout 70% of 240 Vac Nominal Voltage 70% of 240 Vac Nominal Voltage Fixed setting
Generator Undervoltage Dropout 70% of 240 Vac Nominal Voltage 70% of 240 Vac Nominal Voltage Fixed setting
Utility Undervoltage Pickup 80% of 240 Vac Nominal Voltage 80% of 240 Vac Nominal Voltage Fixed setting
Generator Undervoltage Pickup 80% of 240 Vac Nominal Voltage 80% of 240 Vac Nominal Voltage Fixed setting