Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
244
3.1.2.4 Interface Modules
General
The 7SD80 relay is supplied with preconfigured interfaces according to the ordering version. You do not have
to make any adaptations to the hardware (e.g. plugging in jumpers) yourself, except for the installation or re-
placement of communication modules.
The use of the interface modules RS232, RS485 and optical can be defined via the parameter 617 ServiProt.
This parameter is only visible if the 11th digit of the ordering number was selected to be 1 for RS232, 2 for
RS485 or 3 for optical.
Protection Interfaces
The 7SD80 features a CU protection interface and/or an optical fiber protection interface depending on the or-
dering code.
When using the CU protection interface, you have to provide for an external transformer at the input of the long-
distance line cable, which provides protection against high induced voltages.
For example:
Note
The PROT CU communication interface is protected by a protective circuit (surge arrester) on the primary side.
Therefore, checking the insulation at terminals D1 and D2 is not possible at a later time. Component testing is
performed with AC 70 V. For type tests without protective circuit, voltage immunity is tested with AC 1.9 kV.
Installation or Replacement of a SIPROTEC 4 Communication Module
The following description assumes the normal case that a SIPROTEC 4 communication module which has not
yet been existing is retrofitted.
If a SIPROTEC 4 communication module has to be removed or replaced, the steps are to be performed in
reverse order.
Note
Installation is only possible alone or before installing the optical fiber protection interface.
If an optical fiber protection data interface exists, it has to be removed before installing the SIPROTEC 4 com-
munication module. As shown in the following illustration, the parts shown in the lower left section (Z angle,
plastic column) have to be removed to this end. First loosen the three screws for this purpose.
Regulating transformer (ordering code) PCM transformer 6 kV contacting via
solder lugs (C53207-A406-D195-1)
or
PCM transformer 20 kV (screw terminals
for ring cable lug (7XR9516))
Frequency range 6 kHz to 2000 kHz
Transformation ratio 1:1 (150 Ω:150 Ω)
Effective attenuation < 0.5 dB
Fault attenuation > 20 dB
UL listed No
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