Siemens 7SA511 manual If address 2102 setting is, Direc.Comparison Off

7SA511 Line Protection Relay Commissioning the Relay

2.

If address 2102 setting is . . .

Z1B ACCELERATION

FD ACCELERATION

Then . . .

At the receiving end, simulate a fault within zone Z1B but beyond Z1.

At the receiving end, simulate any pickup.

Result

The protection trips at once (or T1B), without reception a delayed time element can only be effective.

The protection trips instantaneously, without reception in a delayed time element.

3. Repeat tests for the other transmission direction.

Carrier Transmission for Directional Comparison Ground Fault Protection (Optional)

This test checks the high-resistance, directional comparison ground fault protection function and is applicable only to relay models 7SA511*-**A5*- 0/2**2/3. Skip this test if you have a different relay configuration.

This test is to be performed from both line ends. The carrier system can be checked from one end of the line with the echo function.

Prerequisite Settings

Addr.	LCD Text
7808	EARTH FAULT
3201	E/F COMPAR
3210	E/F ECHO
1201	DIST. PROT.

Description

Type of high-resistance ground fault detection

Turn on and off the directional comparison protection function

Turn on and off the echo function for directional comparison ground fault protection

Turn on and off the distance protection function

Setting

DIREC.COMPARISON

ON

ON

OFF

Test Procedure

1.Simulate a ground fault in the line direction. Since the relay at the other line end has not picked up on fault, the echo function will be effective at that end and a trip signal results.

2.The effect of the echo delay time and the input of the circuit breaker position can be checked unless it has already been done as part of the test in section 0. The opposite line end is checked.

a)The circuit breakers at both line ends must be open. A ground fault is simulated as above. Because of the echo function of the relay at the opposite line end, the signal is received and a trip signal occurs at once.

b)Close the circuit breaker at the opposite line end. Repeat above test once more. The received signal and trip command occur again but now with an additional delay caused by

7-12 July 27, 1995