Dimensions
Panel Surface Mounting
[dw_7xr8004 dimensions, 1, --_--]
Figure 2-4
7XR8004 Dimensions
Connection Examples
The 7XR8004 replaces the old 7XR6004. The electrical design stayed basically the same, but only one connec-
tion option is supported (2 x 40 KΩ). The following points are changed/improved:
•
The terminals are designed to support higher excitation voltages, in order to satisfy the safety require-
ments and future higher excitation voltages.
•
The Resistors R1/R2 are dimensioned to allow using the configuration of a maximal excitation voltage
(U
cV
) of 2000 V DC:
P
Rtotal
= U
cV
2
/ R
total
= (2000 V)
2
/ 80 kΩ = 50 W
2.3.2
2.3.2.1
2.3.3
7XR8004 – Resistor Coupling Unit for 7XT71
2.3 Construction Properties
SIPROTEC, Coupling Units for Generator Protection, Manual 29
C53000-H5040-C072-1, Edition 09.2018
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