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Table of Contents

Preface..........................................................................................................................................................3

1 7XR81 – Coupling Device for Rotor Ground-Fault Protection.....................................................................11

1.1 Block Diagram...................................................................................................................12

1.2 Connection Notes............................................................................................................. 13

1.2.1 Overview.....................................................................................................................13

1.2.2 Connection Data for Terminal B................................................................................... 13

1.2.3 Connection Data for Terminal A................................................................................... 13

1.3 Construction Properties.....................................................................................................15

1.3.1 Mechanical Structure...................................................................................................15

1.3.2 Dimensions................................................................................................................. 16

1.3.2.1 Panel Surface Mounting......................................................................................... 16

1.3.2.2 Panel Flush Mounting.............................................................................................17

1.4 Connection Examples........................................................................................................18

1.5 Technical Data.................................................................................................................. 19

1.5.1 Auxiliary Voltage and Output Ratings........................................................................... 19

1.5.2 Load Capability of the Capacitive Coupling Circuit........................................................ 19

1.5.3 Weight........................................................................................................................ 19

1.6 Electrical Tests.................................................................................................................. 20

1.6.1 Standards.................................................................................................................... 20

1.6.2 Installation Requirements............................................................................................ 20

1.6.3 Insulation and Safety Tests.......................................................................................... 20

1.6.4 EMC Immunity Tests (Type Tests, Test under Mounting Conditions)..............................20

1.7 Mechanical Tests...............................................................................................................21

1.7.1 Vibration and Shock Stress in Stationary Use................................................................ 21

1.7.2 Vibration and Shock Stress during Transport................................................................ 21

1.8 Environmental Conditions................................................................................................. 22

1.8.1 Temperatures.............................................................................................................. 22

1.8.2 Humidity..................................................................................................................... 22

1.8.3 Other Environmental Information................................................................................ 22

1.9 Protection Degree according to IEC 60529.........................................................................23

2 7XR8004 – Resistor Coupling Unit for 7XT71............................................................................................. 25

2.1 Block Diagram (new 7XR8004).......................................................................................... 26

2.2 Connection Notes............................................................................................................. 27

2.2.1 Overview.....................................................................................................................27

2.2.2 Connection Data for the Power Resistors (3.3 kΩ, 2 x 40 kΩ)........................................27

2.3 Construction Properties.....................................................................................................28

2.3.1 Mechanical Structure...................................................................................................28

SIPROTEC, Coupling Units for Generator Protection, Manual 7

C53000-H5040-C072-1, Edition 09.2018

Brand	Siemens
Model	SIPROTEC 7XR8004
Category	Power distribution unit
Language	English

Siemens SIPROTEC 7XR8004 User Manual

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