Siemens 7SA511 Voltage Metering Test, Voltage Input Connections Addr. No LCD Text, Tolerance

7SA511 Line Protection Relay Acceptance Tests

Voltage Metering Test

This test uses a single-phase input and tests each voltage input separately.

Test Procedure

1. Connect test equipment to the relay as indicated in Table 3-7.

Table 3-7.Voltage Metering Test Connections

Relay Terminal Connections

Test Equipment - Relay

+(where applicable)

-(where applicable)

DC Power supply - Power input

1-phase voltage source - VL1

4B1

3B1

4B2

2B3

Notes: 1. The frequency of the test voltage must be the same as the relay’s rated frequency (f N), as defined at address 7899.

2.The test voltage must match the relay’s rated secondary voltage (V N SECOND.) setting at address 1104.

2.Using the operator panel, display the address corresponding to the terminal pair that has the voltage source connected (see Table 3-8).

3.Ensure that the displayed percentage is within the tolerance indicated in Table 3-8.

4.Move the voltage source to the next pair of terminals indicated in the table below. Repeat steps 2 through 4. Continue testing until all three pairs of voltage input terminals have been tested.

Table 3-8.Voltage Metering Test
Voltage Input Connections		Addr. No.	LCD Text
3B1 - 2B3	(VL1)	5713	UL12[%] = 100%
3B2 - 2B3	(VL2)	5714	UL23[%] = 100%
3B3 - 2B3	(VL3)	5715	UL31[%] = 100%

Tolerance

Min. Value	Max. Value
98%	102%
98%	102%
98%	102%

July 27, 1995 3-11