Siemens 7SA511 manual Turning the Relay Functions On and Off, See Section, Compar Echo

7SA511 Line Protection Relay Chapter 5

5.18 Turning the Relay Functions On and Off

As discussed in section 5.6, “Relay Scope of Functions (7800),” you must program the relay to recognize the various operating and protection functions as existing or non-existing. In addition to those settings, the 7SA511 relay allows certain functions to be turned on or off manually or via binary inputs.

With the relay operating, for example, you may need to turn a function on or off under specific conditions such as turning off the pilot protection function during maintenance or repair of the transmission medium, or turning off the automatic reclose system when a transfer bus is being used.

Table 5-29 identifies all of the On/Off functions available in the 7SA511 relay and shows which section of this manual discusses the actual function.

Table 5-29.Relay Functions that can be Turned On and Off.

Addr.

1201

2101

2201

2220

2601

2801

2910

3001

3101

3201

3210

3301

3401

LCD Text

DIST.PROT.

PUTT MODE

POTT MODE

ECHO

EMERG. O/C

FAULT REC.

FUSE-FAIL

EARTH FAULT

E/F D.T.

E/F COMPAR

E/F ECHO

E/F I.T.

AR FUNCT

Function

Distance protection

Permissive underreach transfer trip mode for distance protection

Permissive overreach transfer trip mode for distance protection—when turned off, echo keying function (2220) is also turned off

Echo keying function for pilot protection with distance protection—this is turned off if POTT mode (2201) is turned off

Emergency overcurrent protection

Waveform capture

Fuse failure monitor

Ground fault detection for ungrounded systems

High-resistance ground fault protection for grounded systems—directional, definite time with nondirectional backup element

Directional comparison ground fault protection for grounded systems—this function is turned off with high-resistance ground fault, directional definite time protection (3101)

Echo keying function for directional comparison ground fault protection—this function is turned off with high-resistance ground fault, directional definite time protection (3101)

High-resistance ground fault protection for grounded systems—nondirectional, inverse time element

Internal automatic reclose function

See Section

5.10

5.12.1

5.12.2

5.12.2

5.13

5.5

5.9.2

5.14

5.15.1

5.15.2

5.15.2

5.15.3

5.16.2

On/off control may be accomplished through the operator panel, the front serial port, and the binary inputs. Refer to Reference E, “Setting Calculations” for detailed information on how on/off control works and how binary inputs must be configured to turn functions on and off.

July 27, 1995 5-45