Siemens 7SA511 Isolated Ground Fault Data Log Messages, Circuit Breaker Operation Statistics

7SA511 Line Protection RelayDisplaying System and Relay Information

6.4.2 Isolated Ground Fault Data Log Messages

Table 6-4 lists all of the available messages for ground fault detection in ungrounded systems. Only messages consistent with your relay configuration and options will appear in the display. See Chapter 8, “Maintenance,” for information on how to erase the message buffer.

Table 6-4. Possible Messages for Ground Fault Data Log

LCD Text (2nd line)

Iea	x mA
Ier	x mA
E/F Detec. L1
E/F Detec. L2
E/F Detec. L3
E/F forwards
E/F reverse
E/F undefined
End of table
Table empty

Description

Active component of ground fault current

Reactive component of ground fault current

Ground fault detected in phase 1

Ground fault detected in phase 2

Ground fault detected in phase 3

Ground fault detected in forwards direction

Ground fault detected in reverse direction

Ground fault direction is undefined, e.g., the current was too small

Follows last stored message if the table is not full

No data recorded

6.5 Circuit Breaker Operation Statistics (5600)

Address block 5600 is used to display the circuit breaker operation statistics. The number of trip commands issued by the relay are counted s parately for each of the breaker poles. In addition, the value of the interrupted phase currents are accumulated and stored. The interrupted current values are expressed as a ratio to the rated r lay current (IN).

For relay models with the optional automatic reclose feature, the number of automatic reclose attempts are counted separately for single-pole RAR, three-pole RAR, and three-pole DAR.

The counters for circuit breaker operations can be reset at address 8202. See Chapter 8, “Maintenance,” for information on how to reset the circuit breaker statistics.

Table 6-5 lists, by address number, all of the available messages for circuit breaker operations. Only messages consistent with your relay configuration and options will be available for display. All descriptions appear in the first line of the LCD, and all values appear in the second line as

shown below. 145601RAR1pole=

Number of automatic reclose attempts after single-pole trip (example display)

Description

6-14 July 27, 1995