7XR86 Voltage Divider (5:1, 5:2)
The 7XR86 coupling unit is used for the 90%-stator ground-fault protection with the 7UM62/7UM85 machine
protection relays.
This device replaces the previous 3PP1336-1CZ-K2Y (5:1, 5:2 voltage divider) resistor unit.
The 7XR86 has the same construction like the 7XR8004. Only the resistors of the 7XR8004 have been
replaced.
The voltage divider is necessary at grounding or neutral-transformer application with a higher secondary
voltage than 200 V (e.g. 500 V) of the protection relay's voltage-inputs maximum voltage (e.g. 100 V).
3.1 Block Diagram 38
3.2 Connection Notes 39
3.3 Construction Properties 40
3.4 Technical Data 41
3.5 Electrical Tests 42
3.6 Mechanical Tests 43
3.7 Environmental Conditions 44
3.8 Protection Degree according to IEC 60529 45
Ordering Information
Use the following table for ordering the device:
Order No. / MLFB
Pos. 1 2 3 4 5 6 7 - 8 9 10 11 12
7 X R 8 6 0 0 - 0 A 0 0
Housing
Panel surface mounting housing with screw terminals → B
3
SIPROTEC, Coupling Units for Generator Protection, Manual 37
C53000-H5040-C072-1, Edition 09.2018
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