Siemens Argus 7SR21, Argus 7SR22, 7SR210, 7SR220 Installation Manual

7SR21 & 7SR22 Argus Installation Guide

The copyright and other intellectual property rights in this document, and in any model or article produced from it (and including any registered or unregistered design rights) are the property of Siemens Protection Devices Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.

While the information and guidance given in this document is believed to be correct, no liability shall be accepted for any loss or damage caused by any error or omission, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed.

7SR21 Non-Directional 7SR22 Directional

Overcurrent Relay

Document Release History

This document is issue 2010/05 The list of revisions up to and including this issue is:

2010/05 Additional Comms modules option of (RS485 + IRIG-B) and (RS232 + IRIG-B) and typographical

revisions

2008/03 First issue

2008/06 R1a Typographical revisions

2008/07 Second Issue. Software revision 2434H80011R3d-2

2009/09 Third Issue. Software revision 2435H80004/5 R4b-4

Software Revision History

2008/03 2435H800004/5R2c-2b First Release

2008/07 2434H80011R3d-2 Demand records. Optional DNP3.0 data comms.

2009/09 2435H80004/5 R4b-4 CTS-I Supervision. Undercurrent 37G & 37SEF. Vx U/O Voltage.

46BC U/C. Comms Settings. Waveform Storage Settings. Fault Storage Settings. Energy Storage. Trip test function. Local/Remote modes. Settings ranges extended. Protocol changes.

7SR21 & 7SR22 Argus Installation Guide

Contents

Document Release History....................................................................................................................1

Software Revision History.....................................................................................................................1

Contents..................................................................................................................................................2

List of Figures.........................................................................................................................................3

Section 1: Installation............................................................................................................................4

1.1 Unpacking, Storage and Handling ............................................................................................4

1.2 Recommended Mounting Position............................................................................................4

1.3 Wiring ........................................................................................................................................4

1.4 Earthing.....................................................................................................................................4

1.5 Ancillary Equipment ..................................................................................................................4

Section 2: Equipment Operating Conditions.......................................................................................5

2.1 Current Transformer Circuits ....................................................................................................5

2.2 External Resistors.....................................................................................................................5

2.3 Fibre Optic Communication ......................................................................................................5

2.4 Front Cover ...............................................................................................................................5

Section 3: Dimensions and Panel Fixings...........................................................................................6

3.1 Relay Dimensions and Weight..................................................................................................6

3.2 Fixings.......................................................................................................................................7

3.2.1 Crimps ..........................................................................................................................7

3.2.2 Panel Fixings................................................................................................................7

3.2.3 Fibre Optic Connectors ................................................................................................7

Section 4: Rear Terminal Drawings......................................................................................................8

4.1 E6 Case ....................................................................................................................................8

4.2 E8 Case ..................................................................................................................................10

4.3 E8 Case ..................................................................................................................................11

Section 5: Connection/Wiring/Diagrams............................................................................................12

5.1 Wiring Diagram: 7SR21 OC/EF Relay....................................................................................12

5.2 Wiring Diagram: 7SR22 Directional OC/EF Relay..................................................................13

Section 6: Data Comms Connections................................................................................................14

6.1 Standard RS485 Connections ................................................................................................14

6.2 IRIG-B Connections ................................................................................................................14

6.3 Additional (Optional) Fibre Optic Connections........................................................................15

6.4 Additional (Optional) RS485 Connections ..............................................................................16

6.5 Additional (Optional) RS232 Connections ..............................................................................16

Section 7: Connection Diagrams........................................................................................................17

7.1 Typical Connection: 7SR22 Directional OC/EF and REF.......................................................17

7.2 Typical Connection: 7SR22 Directional OC/EF and NVD ......................................................18

7.3 Typical Connection: 7SR22 Directional OC/EF and NVD ......................................................19

7.4 Typical Connection: 7SR22 Directional OC/EF and NVD ......................................................20

7.5 Typical Connection: 7SR22 Directional OC and EF ...............................................................21

7.6 Typical Connection: 7SR22 Connected to VTs and Capacitor Cone Unit..............................22

7SR21 & 7SR22 Argus Installation Guide

List of Figures

Figure 3.1-1 Overall Dimensions (mm) and panel Drilling for Size E6 Epsilon case

(Typically 4.2 kg)..................................................................................................................6

Figure 3.1-2 Overall Dimensions (mm) and Panel Drilling for Size E8 Epsilon Case

(Typically 5.3 kg)..................................................................................................................6

Figure 4.1-1 E6 Standard Comms (USB Front Port, Rear RS485) (See Note 2)....................................8

Figure 4.1-2 E6 Standard + Additional Comms (IRIG-B, 2 x F.O. (ST Connectors)) ..............................8

Figure 4.1-3 E6 Standard + Additional Comms (IRIG B + RS485) (See Note 2) ....................................9

Figure 4.1-4 E6 Standard + Additional Comms (IRIG B + RS232) ..........................................................9

Figure 4.2-1 E8 Standard Comms (USB Front Port, Rear RS485) (See Note 2)..................................10

Figure 4.2-2 E8 Standard + Additional Comms (IRIG B, 2 x F.O. (ST Connectors)).............................10

Figure 4.3-1 E8 Standard + Additional Comms (IRIG B + RS485) (See Note 2) ..................................11

Figure 4.3-2 E8 Standard + Additional Comms (IRIG B + RS232)........................................................11

Figure 5.1-1 Connection Diagram for 7SR21 Relay...............................................................................12

Figure 5.2-1 Connection Diagram for 7SR22 Relay...............................................................................13

Figure 6.1-1 RS485 Data Comms Connections Between Relays..........................................................14

Figure 6.3-1 Data Comms to Multiple Devices Using 7SG24 and F.O. Star Network...........................15

Figure 6.3-2 Data Comms to Multiple Devices Using 7SG24 and F.O. Ring Network ..........................15

Figure 6.4-1 RS485 Data Comms Connections Between Relays..........................................................16

Figure 6.5-1 RS232 Data Comms Pin Connections...............................................................................16

Figure 7.1-1 7SR22 Applied to Transformer Incomer ............................................................................17

Figure 7.2-1 7SR22 Applied to Transformer Incomer Including HV NVD Protection.............................18

Figure 7.3-1 7SR22 Applied to Feeder Including NVD Protection.........................................................19

Figure 7.4-1 7SR22 Applied to Feeder ..................................................................................................20

Figure 7.5-1 7SR22 Applied to Feeder - No Zero Sequence Voltage Source .......................................21

Figure 7.6-1 7SR22 Applied to Feeder with Capacitor Cones Fitted.....................................................22

7SR21 & 7SR22 Argus Installation Guide

Section 1: Installation

1.1 Unpacking, Storage and Handling

On receipt remove the relay from the container in which it was received and inspect it for obvious damage. It is recommended that the relay not be removed from its case.

If damage has been sustained a claim should be immediately be made against the carrier, also inform Siemens Protection Devices Limited, and to the nearest Siemens agent, using the Defect Report Form in the Maintenance section of this manual.

When not required for immediate use, the relay should be returned to its original carton and stored in a clean, dry place.

The relay contains static sensitive devices, which are susceptible to damage due to static discharge. The relay’s electronic circuits are protected from damage by static discharge when the relay is housed in its case.

There can be no requirement to disassemble any relay, since there are no user serviceable parts in the relay. If any modules have been tampered with, then the guarantee will be invalidated. Siemens Protection Devices Limited reserves the right to charge for any subsequent repairs.

1.2 Recommended Mounting Position

The relay uses a liquid crystal display (LCD) which is used in the programming and for operation. The LCD has a vertical viewing angle of ± 30˚ and is back–lit. However, the best viewing position is at eye level, and this is particularly important given its control features.

The relay should be mounted on the circuit breaker (or protection panel) to allow the operator the best access to the relay functions

1.3 Wiring

The product should be wired according to the scheme requirements, with reference to the appropriate wiring diagram. Refer to the appropriate Diagrams and Parameters document for a cross reference of wiring diagrams and models.

1.4 Earthing

Terminal 28 of the PSU (Power Supply Unit) should be solidly earthed by a direct connection to the panel earth. The Relay case earth stud connection should be connected to terminal 28 of the PSU.

It is normal practice to additionally 'daisy chain' together the case (safety) earths of all the Relays installed in a panel to prevent earth current loops posing a risk to personnel.

1.5 Ancillary Equipment

The relay can be interrogated locally or remotely. For local interrogation a portable PC with suitable version of MS Windows (2000 SP4 or XP SP2)and Reydisp Evolution™ s/w (Latest Version available 32 bit) using USB port situated on front of the relay.

7SR21 & 7SR22 Argus Installation Guide

Section 2: Equipment Operating

Conditions

2.1 Current Transformer Circuits

The secondary circuit of a live CT must not be open circuited. Non-observance of this precaution can result in injury to personnel or damage to equipment.

2.2 External Resistors

Where external resistors are fitted to relays, these may present a danger of electric shock or burns, if touched.

2.3 Fibre Optic Communication

Where fibre optic communication devices are fitted, these should not be viewed directly. Optical power meters should be used to determine the operation or signal level of the device.

2.4 Front Cover

The front cover provides additional securing of the relay element within the case. The relay cover should be in place during normal operating conditions.

7SR21 & 7SR22 Argus Installation Guide

Section 3: Dimensions and Panel Fixings

3.1 Relay Dimensions and Weight

Relays are supplied in the modular size E6 or E8

The following drawing is available which gives panel cut-out and mounting details.

Figure 3.1-1 Overall Dimensions (mm) and panel Drilling for Size E6 Epsilon case (Typically 4.2 kg)

Figure 3.1-2 Overall Dimensions (mm) and Panel Drilling for Size E8 Epsilon Case (Typically 5.3 kg)

7SR21 & 7SR22 Argus Installation Guide

Hardware Model Net Weight kg

7SR2102 3.3 7SR2103 4.6 7SR2104 4.8 7SR2202 4.8 7SR2203 4.9 7SR2204 5.0

NB: If supplied with communication interface devices please add an additional 0.165 kg

3.2 Fixings

3.2.1 Crimps

Ring tongued crimps with 90˚ bend are recommended.

3.2.2 Panel Fixings

Typical mounting screw kit per Relay)

Consists of 4 off M4x10mm Screws

4 off M4 Nuts

4 off M4 Lock Washer

Typical rear terminal block fixing kit (1kit per terminal block fitted to relay) Consists of:

28 x M4, 8mm Screws

28 x M4 Lock Washer

3.2.3 Fibre Optic Connectors

The relay has Fibre-Optic STTM (BFOC/2.5) bayonet connectors fitted when specified.

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