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Chapter 3 - 7SR157 Performance Specification

Chapter 3 - Page 3 of 18

Contents

Section 1: Common Functions ............................................................................................................................ 4

1.1 General ............................................................................................................................................. 4

1.1.1

CE Conformity...................................................................................................................... 4

1.1.2

Reference ............................................................................................................................ 4

1.1.3

Dimensions .......................................................................................................................... 4

1.1.4

Weights ............................................................................................................................... 4

1.2 Energising Quantities ......................................................................................................................... 5

1.2.1

Auxiliary Power Supply ......................................................................................................... 5

1.2.2

AC Analogue Voltage ........................................................................................................... 6

1.2.3

Binary (Digital) Outputs ........................................................................................................ 7

1.2.4

Binary (Digital) Inputs ........................................................................................................... 7

1.3 Functional performance ..................................................................................................................... 8

1.3.1

Instrumentation .................................................................................................................... 8

1.3.2

Data Communication ............................................................................................................ 8

1.3.3

Real Time Clock ................................................................................................................... 8

1.4 Environmental Performance ............................................................................................................... 9

1.4.1

General ................................................................................................................................ 9

1.4.2

Emissions .......................................................................................................................... 10

1.4.3

Immunity ............................................................................................................................ 11

1.4.4

Mechanical ........................................................................................................................ 13

Section 2: Control & Logic Functions ................................................................................................................ 14

2.1 Voltage Settings (Live and Dead Status)........................................................................................... 14

2.1.1

Live and Dead Status ......................................................................................................... 14

2.1.2

Line and Bus Undervolts Element ....................................................................................... 15

2.1.3

Volts Differential Element ................................................................................................... 15

2.2 Check Synchronising ....................................................................................................................... 16

2.2.1

Reference .......................................................................................................................... 16

2.2.2

25 Check Sync Angle Difference ......................................................................................... 16

2.2.3

25 Check Sync Slip Frequency ........................................................................................... 16

2.2.4

25 Split Angle Detector ....................................................................................................... 16

2.2.5

25 Split Slip Frequency Detector ......................................................................................... 16

2.2.6

25 Check Sync Timer ......................................................................................................... 16

2.3 System Synchronising ..................................................................................................................... 17

2.3.1

Reference .......................................................................................................................... 17

2.3.2

25 System Sync Angle Difference ....................................................................................... 17

2.3.3

25 System Sync Slip Frequency ......................................................................................... 17

2.3.4

25 Close on Zero Slip Frequency ........................................................................................ 17

2.3.5

25 System Sync Timer ....................................................................................................... 17

Section 3: Supervision ..................................................................................................................................... 18

3.1 74CCS Close Circuit Supervision ..................................................................................................... 18

3.1.1

Reference .......................................................................................................................... 18

3.1.2

Operate and Reset Time .................................................................................................... 18

3.2 60 VTF VT Failure ........................................................................................................................... 18

3.2.1

Reference .......................................................................................................................... 18

3.2.2

Operate and Reset Time .................................................................................................... 18