Siemens 7SA511 manual Automatic Reclose Function Settings, Terminology

7SA511 Line Protection Relay Chapter 5

Note: Address number 7910 indicates how the circuit breaker test via binary input is carried out and is discussed, therefore, in Chapter 7 “Commissioning the Relay.”

5.16.2 Automatic Reclose Function Settings (3400)

Table 5-27 lists the relay presettings and the setting options available for automatic reclose operation. Compare these presettings to the information on the completed worksheets and determine which settings you need to change to match your operating environment. When you have changed all of the necessary settings, follow the procedure described in section 5.3.4 to save the new settings.

Terminology:

RAR Rapid Automatic Reclose, or first AR cycle

DAR Delayed Automatic Reclose, or further cycles (shots), after the first

Table 5-27.Automatic Reclose Function Settings

Addr. LCD Text Description

Preset

Options/Range

3401

3402

3405

3406

3407

3412

AR FUNCT

AR BLO REV

T-RECLAIM

T-CLOSE

T-MAN. CLOS

RAR PROG.

Turn the automatic reclose function on or off

Indicate whether or not automatic reclose will be blocked when a fault in the reverse direction is tripped

Reclaim time after the AR cycle

Set the maximum duration of the closing command

Reclaim time after the circuit breaker is manually closed

Select the automatic reclose program for the first reclose cycle (RAR)—this setting is dependent on the relay model

ON

YES

3.00s

1.00s

1.00s

THREE-POLE

OFF

NO

0.50- 320.00 s

0.01- 320.00 s

0.50 - 320.00 s

￿SINGLE-POLE

SINGLE/T

HREE-POL

3413

3414

3415

3416

3418*

RAR ZONE

RAR T-ACT.

RAR T-3POL

RAR T-1POL

EV. F. RECOG

Select the distance protection zone to be used for the RAR cycle

Action time for the RAR (first AR) cycle—if trip signal is issued after this time period, the AR function is blocked

Dead time for a three-pole RAR cycle,

Dead time for a single-pole RAR cycle,

Select how evolving faults are recognized (applicable only to single pole AR)

Z1B

0.20 s

0.50s

1.20s

BY FAULT DETEC.

Z1

0.01 - 320.00 s

0.01- 320.00 s

0.01- 320.00 s

BY TRIP COMMAND

3419*

EV. F. BLOCK

Select how evolving faults are handled

-always blocked; never blocked; blocked after the time period set in address 3420

ALWAYS

￿NEVER >T-DISCR.

3420*

T-DISCR.

Discrimination time for evolving faults when address 3419 is set to >T-DISCR.

0.10 s

0.01 - 320.00 s

*This parameter is only used with single-pole reclose.

July 27, 1995 5-43