Eaton Electrical RTC-50 Hardware Description, General, LED Indicators, Programming Jumpers

Instructional Booklet

Page 4 Effective: June 2007

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

26.Utility - Monitoring and Protection

This feature provides Utility monitoring and protection functions. If the Utility power source fails, then the RTC- 50 will begin the sequence of operations necessary to transfer the load circuit to the Generator power source. All Feature 26 monitoring and protection functions are fail- safe operations.

26D. Go To Generator

This feature provides the capability for an external contact closure to initiate a transfer from Utility to Generator. After the Generator becomes available, TDNE will time out before the transfer to Generator takes place. Re-transfer will occur when the external contact is opened or under a failsafe condition. A connection point for the connection of an external contact is provided.

26P. All Phase Undervoltage Protection

Dropout: 168 Vac (70% of 240 Vac nominal)

Pickup: 192 Vac (80% of 240 Vac nominal)

SECTION 2:HARDWARE DESCRIPTION

2.1 General

The purpose of this section is to familiarize the reader with the RTC-50 controller hardware, its nomenclature, and to list the unit’s specifications.

2.2 LED Indicators

•Utility Available

The green Utility Available LED illuminates if the utility power source meets the criteria to be considered “available”. That is, when it is within its undervoltage range.

•Generator Available

The red Generator Available LED illuminates if the generator power source meets the criteria to be considered “available”. That is, when it is within its undervoltage range.

2.3 Programming Jumpers

The RTC-50 controller is programmable via two jumpers on the PC board. The jumper selections are discussed in Section 4, Program- ming.

Figure 1. RTC-50 Connectors and Programming Jumpers.

2.4 Input/Output Connectors

Located along the bottom of the RTC-50 are connectors J1, J2, J3, and J4. J1 and J2 provide for voltage monitoring of utility. J3 and J4 provide for voltage monitoring of the generator.

Located along the top of the RTC-50 are connectors J6, J7, and J8. J6 provides connections for the control input and the transfer switch control outputs. J7 provides load shedding connections for the customer to use. J8 provides connections to a remote light to indicate that generator service is due. A pushbutton can be wired to the Reset Switch input to acknowledge and reset the Generator Service indication.

For more information visit: www.eaton.com IB00405004E-70-8664