Siemens 7SA511 manual Addr. Block, Z1B Z1L, Fault Loop Earthed Network Fault Loop NON-EARTHED NET

7SA511 Line Protection Relay Chapter 5

Table 5-9.Distance Protection Settings By Address Block.

Addr. Block

1200

1300

1400

1500

1600

LCD Text

DIST. PROT.

GENERAL SETTINGS

DIST. PROT.

INDEPEND. ZONES

DIST. PROT.

CONTROLLED ZONES

DIST. PROT.

FAULT DETECTION

DIST. PROT.

FAULT DETECTION

Description

Indicate whether distance protection is On or Off, program the direction of the distance protection directional zone, and set the tirp delays T4 and T5.

Parameters for independent distance zones.

Z1

Z2

Z3

Parameters for controlled (overreach) zones.

Z1B

Z1L

Measurement control parameters for voltage controlled overcurrent fault detection OR polygonal impedance fault detection.

Parameters for the fault detection

1700

1800

FAULT LOOP EARTHED NETWORK

FAULT LOOP NON-EARTHED NET

Parameters for determination of a fault loop in a grounded system.

Parameters for determination of a fault loop in an ungrounded system (isolated or compensated).

Distance protection settings can vary between the parameter sets when the parameter changeover feature is available (see section 5.8).

The distance protection settings discussed in this section are categorized as follows:

General settings

Settings for independent distance zones Z1, Z2, and Z3

Settings for controlled (overreach) zones Z1B and Z1L

Fault detection settings as follows:

Overcurrent fault detection

-Voltage controlled fault detection Polygonal impedance fault detection

￿Settings for determination of the fault loop in grounded systems Settings for determination of the fault loop in ungrounded systems

July 27, 1995 5-25