Siemens 7SA511 manual High-Set, Definite Time

7SA511 Line Protection Relay Acceptance Tests

Table 3-31.Overcurrent Test

Current Input Connections

High-Set

3A1 - 3A2

2A1 - 2A2

1A1 - 1A2

Definite Time

3A1 - 3A2

2A1 - 2A2

1A1 - 1A2

1D1 - 1D2

Pickup Current

2.00IN 5%

2.00IN 5%

2.00IN 5%

1.00IN 5%

1.00IN 5%

1.00IN 5%

0.20IN ±5%

Trip Delay

0.30 s	10 ms
0.30 s	10 ms
0.30 s	10 ms
1.50 s	15 ms
1.50 s	15 ms

1.50s 15 ms

0.30s ±15 ms

LED

2

3

4

2

3

4

5

3.14 Isolated Ground Fault Detection Test (Optional)

Testing of the ground fault detection function for isolated or compensated systems is difficult with conventional test equipment. since the fault simulation requires a complete and accurate displacement of the voltage triangle. Testing of this function is best done during commissioning when the measurement transformers and connections are verified with primary load currents.

3.15 High-Resistance Ground Fault Protection Tests (Optional)

The tests in this section check the high-resistance ground fault protection element and are only applicable for relay models 7SA511*-**A5*-***2/3. Skip this section if you have a different relay configuration.

In “Scope of Functions” address 7808, this protective function is programmed as directional definite time protection or as nondirectional inverse time protection. Check the setting at address 7808 and continue with the test that is applicable to your relay settings.

For directional definite time protection, with or without directional comparison,

￿continue with section 3.15.1.

For nondirectional inverse time protection, continue with section 3.15.2.

Prerequisite Setting:

Addr.	LCD Text
1201	DIST. PROT.

Description

Turn the distance protection function on or off

Setting

OFF

3.15.1 Testing the Directional, Definite Time Ground Fault Protection

This test procedure is applicable to directional, definite time protection, with or without directional comparison. However, for directional comparison, the required relay presettings are different. Table 3-32 describes the required settings for this test that you will need to verify in your relay.

3-30 July 27, 1995