CPU processor HIEE300888R0002 UAC389AE02 module ABB Switzerland

Description

Measured values, event records and product information are actual values. Actual values

may be accessed via any of the following methods:

• Front panel, using the keys and display.
• Front program port or rear Ethernet port and a portable computer running the

EnerVista 745 Setup software supplied with the relay.

• Rear RS485/RS422 COM 1 port or RS485 COM 2 port with any system running user

written software.

Any of these methods can be used to view the same information. A computer, however,

makes viewing much more convenient, since more than one piece of information can be

viewed at the same time.

Actual value messages are organized into logical groups, or pages, for easy reference. All

actual value messages are illustrated and described in blocks throughout this chapter. A

reference of all messages is also provided at the end of the chapter. All values shown in

these message illustrations assume that no inputs (besides control power) are connected

to the 745.

Some messages appear on the following pages with a gray background. This indicates

that the message may not appear depending upon the configuration of the relay (as

selected by setpoints) or the options installed in the relay during manufacture. For

example, no display associated with winding 3 will ever appear if the relay is not

configured for three-winding operation

These actual values appear when the relay is ordered with the Ethernet (T) option.

The ETHERNET STATUS actual value message indicates the status of the Ethernet link,

connection, and diagnostic via three indicators. The [] symbol indicates on, and the [ ]

symbol indicates off. There is also a blinking indication.

The box under Lnk column indicates the Ethernet link status. If it is on, the Ethernet port is

connected to the network; if it is off, the port is disconnected. This indicator is normally on.

The box under the Con column indicates the connection status. If on, the Ethernet port is

configured and ready to transmit and receive data. If blinking, the Ethernet port is either

active (transmitting or receiving data) or indicating an error if the diagnostic status is also

on or blinking.

The box under the Dia column indicates the diagnostic status. If it is on, then either a fatal

Ethernet port error has occurred or there is a duplicate IP address on the network. If

blinking, then there is a non-fatal network error. Off indicates no errors.

For each monitored winding, the fundamental frequency magnitude and phase angle of

phase A, B, C and ground currents are recalculated every half-cycle for use in differential

and overcurrent protection. From these values, neutral, positive, negative and zero

sequence as well as differential, restraint and ground differential currents are calculated.

These are displayed and updated approximately twice a second for readability

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