Overview .............................................................................................................................................. 1 - 1

Description of the 850 Feeder Protection System............................................................ 1 - 2

Security Overview............................................................................................................................ 1 - 7

850 Order Codes............................................................................................................................... 1 - 8

Specifications...................................................................................................................................1 - 11

Device .......................................................................................................................................................... 1 - 11

Protection................................................................................................................................................... 1 - 11

Control ......................................................................................................................................................... 1 - 21

Monitoring.................................................................................................................................................. 1 - 23

Recording ................................................................................................................................................... 1 - 24

User-Programmable Elements ........................................................................................................ 1 - 25

Metering...................................................................................................................................................... 1 - 26

Inputs ........................................................................................................................................................... 1 - 28

Outputs........................................................................................................................................................ 1 - 29

Power Supply ........................................................................................................................................... 1 - 31

Communications .................................................................................................................................... 1 - 31

Testing & Certification.......................................................................................................................... 1 - 32

Physical....................................................................................................................................................... 1 - 33

Environmental.......................................................................................................................................... 1 - 33

Cautions and Warnings ..............................................................................................................1 - 34

Safety words and definitions............................................................................................................ 1 - 34

General Cautions and Warnings..................................................................................................... 1 - 34

Must-read Information ................................................................................................................1 - 37

Storage........................................................................................................................................................ 1 - 38

For Further Assistance.................................................................................................................1 - 38

Repairs......................................................................................................................................................... 1 - 38

Mechanical Installation ................................................................................................................. 2 - 1

Product Identification..............................................................................................................................2 - 1

Dimensions...................................................................................................................................................2 - 2

Mounting .......................................................................................................................................................2 - 3

Standard Panel Mount.............................................................................................................................2 - 4

Depth Reducing Collar.............................................................................................................................2 - 5

Draw-out Unit Withdrawal and Insertion ......................................................................................2 - 7

Removable Power Supply .....................................................................................................................2 - 8

Removable Magnetic Module..............................................................................................................2 - 9

Arc Flash Sensor ..................................................................................................................................... 2 - 10

Sensor Fiber Handling & Storage ....................................................................................................2 - 10

Sensor Installation..................................................................................................................................2 - 10

Electrical Installation ....................................................................................................................2 - 11

Typical Wiring Diagram....................................................................................................................... 2 - 11

Terminal Identification ......................................................................................................................... 2 - 13

Wire Size......................................................................................................................................................2 - 17

Phase Sequence and Transformer Polarity ............................................................................... 2 - 18

Ground CT Inputs.................................................................................................................................... 2 - 18

Voltage Inputs.......................................................................................................................................... 2 - 20

Restricted Earth Fault Inputs ............................................................................................................ 2 - 20

Zero-Sequence CT Installation......................................................................................................... 2 - 21

Control Power........................................................................................................................................... 2 - 22

Contact Inputs ......................................................................................................................................... 2 - 22

Output Relays .......................................................................................................................................... 2 - 23