Siemens 7SA511 Pott Mode Transblo Wait TB SEND-PRL, SEND-DEL Echo ECHO-DEL ECHO-IMP ECHO-BLO

7SA511 Line Protection Relay Programming the Relay

Table 5-20.Pilot Protection Permissive Overreach Transfer Settings, Address Block 2200.

Addr.

2201

2202

2203

2204

2206

2210

2212

2220

2221

2222

2223

LCD Text

POTT MODE

POTT MODE

T-TRANSBLO

T-WAIT TB

T-SEND-PRL

POTT DirFD

T-SEND-DEL

ECHO

T-ECHO-DEL

T-ECHO-IMP

T-ECHO-BLO

Description

Turn permissive overreach transfer trip on or off

Transfer trip mode

Transient blocking time after an external fault—this time must be longer than the transmission time

Waiting time before transient blocking with a missing reception signal

Time duration for the transmission signal

When the directional comparison mode (FD DIREC RELEASE) is selected at address 2202, this setting indicates the effective direction

Transmission signal delay time

Turn the echo keying function on or off

Echo time delay

Duration of echo impulse

Echo blocking time

Preset

ON

Z1B RELEASE

0.05 s

•s

0.05s

FORWARDS

0.00s

ON

0.20s

0.05s

Options/Range

OFF

FD DIREC

RELEASE

Z1B UNBLOCK FD UNBLOCK Z1B BLOCKING PILOT WIRE COMP.

REVERS INTERLOCK

0.01 to 32.00 s

•0.01 to 32.00 s

0.01 to 32.00 s

￿REVERSE NON-

DIRECTIONAL

0.00to 32.00 s

OFF

￿0.01•- 32.00 s

0.02- 32.00 s

0.01- 32.00 s

5.13 Emergency Overcurrent Protection (2600)

Address block 2600 consists of the settings required for the 7SA511 relay to act as an emergency overcurrent protection device.

During emergency operation, the pilot protection function is disabled. It is possible, however, to carry out automatic reclose in the emergency overcurrent protection mode. Refer to section 5.16 for details.

Table 5-21 lists the relay presettings and setting options available for emergency overcurrent protection. 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

5-36 July 27, 1995