Siemens SIPROTEC 7SJ81 User manual

E50417-K1150-C462-A2
SIPROTEC
7SJ81/7SK81
V4.7
Product Information

Siemens Aktiengesellschaft Order No.: E50417-K1150-C462-A2
Subject to change without prior notice.
Document Release V04.01.01
Edition 02.2012
Note
Please observe Notes and Warnings for your own safety in Chapter 2.
Note
This Product Information contains important information about the
SIPROTEC-device 7SJ81/7SK81.
It is part of the product supplied, and the information in it should be
considered more up-to-date than any other information if uncertainties
arise.

3SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
Table of Contents
1 General 4
2 Safety Information 5
3 Statement of Conformity 7
4 Unpacking and Re-Packing 8
5 Storage and Transport 9
6 Functional Description 10
7 Dimensions 19
8 Installation Notes 20
9 Connection Notes 21
10 Limit Values of Inputs and Outputs 33
11 Ordering Data 35
12 General Diagrams and Connection Diagrams 42
13 Operating Pre-conditions 51

4SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
1 General
Disclaimer of Liability
Although we have carefully checked the contents of this publication for
conformity with the hardware and software described, we cannot guaran-
tee complete conformity since errors cannot be excluded.
The information provided in this Product Information is checked at regular
intervals and any corrections that might become necessary are included
in the next releases. Any suggestions for improvement are welcome.
Subject to change without prior notice.
Copyright
Copyright © Siemens AG 2012
The reproduction, transmission or use of this document or its contents is
not permitted without express written authority. Offenders will be liable for
damages.All rights,includingrightscreatedbypatentgrantor registration
of a utility model or design, are reserved.
Registered Trademarks
SIMATIC, SIMATIC NET, SIPROTEC, DIGSI, SIMEAS, SICAM and
SINAUTareregistered trademarksofSIEMENSAG. Allotherproductand
brandnamesinthismanualmightbetrademarks,the useofwhich bythird
personsfortheir purposesmightinfringe the rights of theirrespective own-
ers.
Note:
For further information see:
SIPROTEC 7SJ80 V4.60, Manual E50417-G1140-C343
SIPROTEC 7SK80 V4.60, Manual E50417-G1140-C344
SIPROTEC System Description E50417-H1176-C151
ReadMe-USB.pdf for DIGSI V4.82 (www.siprotec.com)

5SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
2 Safety Information
This manual is not a complete index of all safety measures required for
operation of the equipment (module, device). However, it comprises im-
portant information that must be noted for purposes of personal safety, as
well as in order to avoid material damage. Information is highlighted and
illustrated as follows according to the degree of danger:
DANGER
DANGER means that death or severe injury will result if the measures
specified are not taken.
•Comply with all instructions, in order to avoid death or severe injuries.
WARNING
WARNING means that death or severe injury may result if the measures
specified are not taken.
•Comply with all instructions, in order to avoid death or severe injuries.
CAUTION
CAUTION means that or medium-severe or slight injuries can occur if the
specified measures are not taken.
•Complywithallinstructions,inordertoavoidmoderateorminorinjuries.
NOTICE
NOTICE means that property damage can result if the measures speci-
fied are not taken.
•Comply with all instructions, in order to avoid property damage.

6SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
Qualified Electrical Engineering Personnel
Only qualified electrical engineering personnel may commission and
operate the equipment (module, device) described in this document.
Qualified electrical engineering personnel in the sense of this manual are
people who can demonstrate technical qualifications as electrical techni-
cians.These personsmay commission,isolate, groundandlabeldevices,
systems and circuits according to the standards of safety engineering.
Use as Prescribed
The equipment (device, module) may only be used for such applications
as set out in the catalogs and the technical description, and only in com-
bination with third-party equipment recommended and approved by Sie-
mens.
Problem-free and safe operation of the product depends on the following:
•Proper transport
•Proper storage, setup and installation
•Proper operation and maintenance
When electrical equipment is operated, hazardous voltages are inevita-
bly present in certain parts. If proper action is not taken, death, severe
injury or property damage can result.
•The equipment must be grounded at the grounding terminal before any
connections are made.
•All circuit components connected to the power supply may be subject
to dangerous voltage.
•Hazardousvoltagesmaybepresentin equipmentevenafter thesupply
voltage has been disconnected (capacitors can still be charged).
•Equipment with exposed current transformer circuits must not be oper-
ated.
•The limit values stated in the document may not be exceeded. This
must also be considered during testing and commissioning.
NOTE
Important information about the product, product handling or a certain
section of the documentation, which must be given particular attention.

7SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
3 Statement of Conformity
FurtherIEEE Std C37.90
This product complies with the directive of the Council of the European
Communities on the approximation of the laws of the Member States
relating to electromagnetic compatibility (EMC Council Directive 2004/
108/EC) and concerning electrical equipment for use within specified
voltage limits (Low-voltage Directive 2006/95/EC).
This conformity has been established by means of tests conducted by
Siemens AG in accordance of the Council Directive in agreement with
the generic standards EN 61000-6-2 and EN 61000-6-4 for the EMC
directives, and with the standard EN 60255-27 for the low-voltage
directive.
The device has been designed and produced for industrial use.
The product is conforming to the international standards of the series
IEC 60255 and the German regulation of VDE 0435.
NOTE concerning battery disposal
The batteries must only be replaced with the same type or another type
recommended by the manufacturer. Improper replacement involves
explosion hazard. For disposing the batteries it is necessary to observe
the local national/international directives.

8SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
4 Unpacking and Re-Packing
When dispatched from the factory, the equipment is packed in accor-
dance with the guidelines laid down in IEC 60255-21 which specify the
impact resistance of packaging.
Thispackingshall beremovedwithcare,withoutforceandwithouttheuse
of inappropriate tools. The equipment should be visually checked to
ensure that there are no external traces of damage.
Please observe absolutely all notes and hints which may be enclosed in
the packaging.
Before initial energization with supply voltage, or after storage, the relay
shall be situated in the operating area for at least two hours in order to
ensure temperature equalization and to avoid humidity influences and
condensation.

9SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
5 Storage and Transport
SIPROTEC relays should be stored in dry and clean rooms. The limit tem-
perature range for storage of the relays or associated spare parts is
−25 °C to +55 °C, corresponding to −13 °F to 131 °F.
The relative humidity must be within limits such that neither condensation
nor ice forms.
It is recommended to reduce the storage temperature to the range
+10 °C to +35 °C (50 °F to 95 °F); this prevents early ageing of the
electrolytic capacitors which are contained in the power supply.
For very long storage periods, it is recommended to connect the relay to
the auxiliary voltage source for one or two days every other year, in order
to regenerate the electrolytic capacitors. The same is valid before the
relay is finally installed.
For further transport, the transport packing can be re-used when applied
in the same way. The storage packing of the individual relays is not suited
for transport. If alternative packing is used, this must also provide the
same degree of protection against mechanical shock and vibration as laid
down in IEC 60255-21-1 class 1 and IEC 60255-21-2 class 1.
The Lithium batteries in our equipment are subject to Special
Provision 188 of the UN Recommendations on the Transport of Danger-
ous Goods Model Regulations and Special Provision A45 of the IATA
Dangerous Goods Regulation and the ICAO Technical Instructions. This
is only valid for the original battery or original spare batteries.

10 SIPROTEC 7SJ81/7SK81 V4.70, Product Information
E50417-K1150-C462-A2, Edition 02.2012
6 Functional Description
General
Unlike the 7SJ80/7SK80, the SIPROTEC device 7SJ81/7SK81 has 4 low-
power current transformers (LPCT) inputs and optionally 3 low-power
voltage transformers (LPVT) inputs. One low-power current transformer
(LPCT) is sufficient to cover a very large range of primary rated line
currents. Objects with rated currents in the range from 40 A to 5000 A can
be protected when using low-power current transformers. The following
low-power current transformer ratios are suitable for the following primary
current operating ranges:
•100 A/225 mV for a primary operating current range of 40 A to 600 A
•50 A/22.5 mV for a primary operating current range of 200 A to 3000 A
•400 A/225 mV for a primary operating current range of 200 A to 2500 A
•100 A/22.5 mV for a primary operating current range of 400 A to
5000 A
Resistive voltage dividers are provided aslow-power voltagetransformers
(LPVT). This product information describes device-specific modifications
compared to the 7SJ80 manual (order number E50417-G1140-C343) and
the 7SK80 manual (order number E50417-G1140-C344). The manuals
provide more detailed information.