Siemens 7SA511 manual Initial Setup, High-Set Overcurrent, DIST. PROT. NON-EXIST EMERG. O/C Exist

7SA511 Line Protection Relay Acceptance Tests

3.13.1 Initial Setup

1. Connect test equipment to the relay as indicated in Table 3-27.

Table 3-27.Emergency Overcurrent Test Connections

Relay Terminal Connections

Test Equipment - Relay

+(where applicable)

-(where applicable)

DC Power supply - Power input

1-phase current source - IL1

Timer start* - Signal relay 7

-Signal relay 8

-Signal relay 9

-Signal relay 10

Timer stop - Signal relay 6

4B1

3A1

3D2

3D3

3D4

3C1

3C2

4B2

3A2

2D2

2D3

2D4

2C1

3C4

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

*Signal relays 7-10 should be wired in parallel to the timer start input so that closing of any one of the four relays will start the timer.

2.Set the input current to zero.

3.Power on the relay.

4.Using the programming procedures described in “Programming the Relay,” ensure that the settings for Signal Relays 6 - 10, and LEDs 10-13 match the factory presets indicated in Table 5-30. In addition, ensure that the settings for address block 2600 (emergency overcurrent protection - Table 5-21) match the factory presets.

5.Set parameters as indicated in Table 3-28.

Table 3-28.Emergency Overcurrent Protection Test Settings

Addr.

7801

7803

LCD Text

DIST. PROT. NON-EXIST

EMERG. O/C EXIST

6. Go to the heading that identifies the particular overcurrent element that you wish to test:

￿High-set	3.13.2
Definite time	3.13.3

3.13.2 High-Set Overcurrent

This test checks the operation of the high-set overcurrent protection element.

1.Using programming procedures described in “Programming the Relay” set parameters as indicated in Table 3-29. All other relay settings should be factory presets.

3-28 July 27, 1995