Section 1: Common Functions ................................................................................................................................. 6

1.1 General ................................................................................................................................................... 6

1.1.1

CE Conformity ........................................................................................................................... 6

1.1.2

Reference ................................................................................................................................. 6

1.1.3

Dimensions ............................................................................................................................... 6

1.1.4

Weights ..................................................................................................................................... 7

1.2 Energising Quantities .............................................................................................................................. 8

1.2.1

Auxiliary Power Supply ............................................................................................................. 8

1.2.2

AC Analogue Current .............................................................................................................. 10

1.2.3

AC Analogue Voltage .............................................................................................................. 10

1.2.4

Binary (Digital) Outputs ........................................................................................................... 11

1.2.5

Binary (Digital) Inputs .............................................................................................................. 11

1.3 Functional performance ........................................................................................................................ 12

1.3.1

Instrumentation ....................................................................................................................... 12

1.3.2

Real Time Clock ...................................................................................................................... 12

1.4 Data Communication Interfaces ............................................................................................................ 13

1.4.1

USB 2.0 Data Communication Interface ................................................................................. 13

1.4.2

RS485 Data Communication Interface .................................................................................... 13

1.4.3

Fibre Optic Ethernet Data Communication Interface (IEC 61850 Option) ............................... 13

1.4.4

Electrical Ethernet Data Communication Interface (IEC 61850 Option) .................................. 13

1.5 Environmental Performance .................................................................................................................. 14

1.5.1

General ................................................................................................................................... 14

1.5.2

Emissions................................................................................................................................ 15

1.5.3

Immunity ................................................................................................................................. 15

1.5.4

Mechanical .............................................................................................................................. 17

Section 2: Protection Functions ............................................................................................................................. 18

2.1 27/59 Under/over voltage ...................................................................................................................... 18

2.1.1

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

2.1.2

Operate and Reset Level ........................................................................................................ 18

2.1.3

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

2.2 32 Power ............................................................................................................................................... 19

2.2.1

Reference ............................................................................................................................... 19

2.2.2

Operate and Reset Level ........................................................................................................ 19

2.2.3

Operate and Reset Time ......................................................................................................... 19

2.2.4

Operate Threshold .................................................................................................................. 19

2.3 32S Sensitive Power ............................................................................................................................. 20

2.3.1

Reference ............................................................................................................................... 20

2.3.2

Operate and Reset Level ........................................................................................................ 20

2.3.3

Operate and Reset Time ......................................................................................................... 20

2.3.4

Operate Threshold .................................................................................................................. 20

2.4 37 Undercurrent .................................................................................................................................... 21

2.4.1

Reference ............................................................................................................................... 21

2.4.2

Operate and Reset Level ........................................................................................................ 21

2.4.3

Operate and Reset Time ......................................................................................................... 21

2.5 46 Negative Phase Sequence Overcurrent .......................................................................................... 22

2.5.1

Reference (46DT) ................................................................................................................... 22

2.5.2

Operate and Reset Level (46DT) ............................................................................................ 22

2.5.3

Operate and Reset Time (46DT) ............................................................................................. 22

2.5.4

Reference (46IT) ..................................................................................................................... 22

2.5.5

Operate and Reset Level (46IT) .............................................................................................. 22

2.5.6

Operate and Reset Time (46IT) .............................................................................................. 23

2.6 47 Negative Phase Sequence Voltage................................................................................................. 24

2.6.1

Reference (47) ........................................................................................................................ 24

2.6.2

Operate and Reset Level (47) ................................................................................................. 24

2.6.3

Operate and Reset Time (47) ................................................................................................. 24

2.7 49 Thermal Overload ............................................................................................................................ 25

2.7.1

Reference ............................................................................................................................... 25

2.7.2

Operate and Reset Level ........................................................................................................ 25

2.7.3

Operate and Reset Time ......................................................................................................... 25

2.8 50 Instantaneous Overcurrent ............................................................................................................... 27

7SR11 & 7SR12 Performance Specification

Chapter 3 Page 3 of 56

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