Siemens 7SA511 manual Zone & Description Preset, Controlled Overreach Zones Z1B and Z1L

7SA511 Line Protection Relay Programming the Relay

Table 5-11.Distance Protection Settings for Independent Zones Z1, Z2, and Z3

Addr.

1301

1302

1303

1304

1305*

LCD Text

R1

X1

R1E

DIREC. Z1

T1 1phase

Zone & Description		Preset
Z1.	Resistance for phase-to-phase	1.25
faults
Z1.	Reactance value (reach)	2.50
Z1.	Resistance for phase-to-	2.50
ground faults
Z1 measurement direction		FORWARDS (line)
Z1.	Trip delay for single-phase	0.00 s
faults

Options/Range

0.05 - 65.00 W

0.05- 130.00

0.05- 130.00 W

REVERSE (bus) NON-

DIRECTIONAL

0.00 - 32.00 s

1306*

T1 >1phase

Z1. Trip delay for multi-phase faults

0.00 s

0.00•- 32.00 s

1311

1312

1313

R2

X2

R2E

Z2.	Resistance for phase-to-phase	2.50
faults.
Z2.	Reactance value (reach).	5.00
Z2.	Resistance for phase-to-	5.00
ground faults.

0.05 - 65.00

0.05- 130.00

0.05- 130.00 W

1314

1315*

1316*

DIREC. Z2

T2 1phase

T2 >1phase

Z2. Measurement direction.

Z2. Trip delay for single-phase faults.

Z2. Trip delay for multi-phase faults.

FORWARDS (line direction)

0.30s

0.30s

REVERSE (bus) NON-

DIRECTIONAL

0.00 - 32.00 s

0.00•- 32.00 s

1321

1322

1323

1324

1325

R3

X3

R3E

DIREC. Z3

T3

Z3.	Resistance for phase-to-phase	5.00
faults.
Z3.	Reactance value (reach).	10.00
Z3.	Resistance for phase-to-	10.00
ground faults
Z3. Measurement direction.		FORWARDS (line
		direction)
Z3. Delay time.		0.60 s

0.05 - 65.00 W

0.05- 130.00

0.05- 130.00 W

REVERSE (bus) NON-

DIRECTIONAL

￿0.00•- 32.00 s

5.10.3 Controlled (Overreach) Zones Z1B and Z1L (1400)

Address block 1400 consists of the settings required for overreach zones Z1B and Z1L. The settings include the reactance value, X, or reach, for each zone; the resistance value, R, for line and fault resistance, which can be set separately for phase-to-phase faults and for phase-to-ground faults; the measurement direction for each zone; delay time T1B for single-phase faults and for multi-phase faults; and delay time T1L. See Reference E, “Setting Calculations,” for detailed information on determining these settings.

*Normally, addresses 1305 and 1306 are set to the same value, and addresses 1315 and 1316 are set to the same value.

5-28 July 27, 1995