Siemens 7SA511 manual Minus, LED Test

7SA511 Line Protection Relay Acceptance Tests

9.Move the voltage source to the next pair of terminals indicated in Table 3-11. Repeat steps 5 through 8 then exit the test procedure.

Table 3-11.Binary Input Test

Binary Input Connections

Binary Input No.

1

2

4

5

6

Plus (+)

8A2

8A4

7A4

8D2

8D4

Minus (-)

8A1

8A3

7A3

8D1

8D3

LCD Text (2nd line)

LED reset C

>VT mcb Trip C

Manual Close C

>Dist. Recept C

>Dist.Rec Fail.C

3.7 LED Test

This test checks the operation of a subset of the programmable LEDs on the operator panel. Factory presets are used for this test. A single-phase current large enough to cause the emergency overcurrent protection to pick up is applied sequentially to each of the three phase current inputs. A table is provided that shows which LEDs should light at each stage of the test. The final step in this procedure tests the relay function that allows the LEDs to be reset by means of a binary input.

Test Procedure

1.Connect test equipment to the relay as indicat d in Table 3-12. Binary Input 1 is the only binary input that should have a connection.

Table 3-12.LED Test Connections

Relay Terminal Connections

Test Equipment - Relay

+(where applicable)

-(where applicable)

DC Power supply - Power input

1-phase current source - IL1

DC Voltage source - Binary input 1

4B1

3A1

8A2

4B2

3A2

8A1

Note: The frequency of the test current must be the same as the relay’s rated frequency, f N, as defined at address 7899.

2.Set the current and voltage sources to zero.

3.Power on the relay and press the TargetResetkey. All programmable LEDs should be off.

4.Using the programming procedures described in “Programming the Relay,” ensure the settings for the programmable LEDs (addresses 6301 - 6314) match the default settings shown in Table 5-30. Also, ensure the settings shown in Table 3-13 are as indicated.

July 27, 1995 3-13