7SR210 & 7SR220 Description of Operation
Unrestricted Page 8 of 94
©2018 Siemens Protection Devices Limited
Section 1: Introduction
This manual is applicable to the following relays:
·
7SR210 Multi-Function Non-directional Overcurrent and Earth Fault Relay
·
7SR220 Multi-Function Directional Overcurrent and Directional Earth Fault Relay
The 7SR210 and 7SR220 relays integrate the protection and control elements required to provide a complete
overcurrent based protection.
The ‘Ordering Options’ Tables summarise the features available in each model.
General Safety Precautions
1.1 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.
1.2 External Resistors
Where external resistors are fitted to the circuit, these may present a danger of electric shock or burns, if touched.
1.3 Fibre Optic Communication
Where fibre optic communication ports are fitted, the lasers are Class 1 devices but recommend they should not
be viewed directly. Optical power meters should be used to determine the operation or signal level of the device.
1.4 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.
1.5 Disposal
The Relay should be disposed of in a manner which does not provide a threat to health or the environment. All
laws and regulations specific to the country of disposal should be adhered to.
The relays and protection systems manufactured under the Reyrolle brand currently do not come within the scope
of either the European WEEE or RoHS directives as they are equipment making up a fixed installation.
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Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
Page 468: ...7SR220 Technical Manual Chapter 4 Page 88 of 96 2017 Siemens Protection Devices Limited ...
Page 470: ...7SR220 Technical Manual Chapter 4 Page 90 of 96 2017 Siemens Protection Devices Limited ...
Page 472: ...7SR220 Technical Manual Chapter 4 Page 92 of 96 2017 Siemens Protection Devices Limited ...
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