Eaton Electrical RTC-50 Programming, Introduction, Fixed and Jumper-Selectable Settings

Instructional Booklet

Instruction Manual for the Eaton RTC-50 Automatic Transfer Switch Controller

Effective: June 2007 Page 7

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

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