Siemens 7SR210 - 1.2 Binary Inputs

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7SR21 & 7SR22 - 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.

Main Page

Document Release History2
Table of Contents3
List of Figures4
Section 1: Installation5
Unpacking, Storage and Handling5
Recommended Mounting Position5
Wiring5
Earthing5
Ancillary Equipment5
Section 2: Equipment Operating Conditions6
Current Transformer Circuits6
External Resistors6
Fibre Optic Communication6
Front Cover6
Section 3: Dimensions and Panel Fixings7
Relay Dimensions and Weight7
Figure 3.1-1 Overall Dimensions (MM) and Panel Drilling for Size E6 Epsilon Case7
Figure 3.1-2 Overall Dimensions (MM) and Panel Drilling for Size E8 Epsilon Case7
Fixings8
3.2.1 Crimps8
3.2.2 Panel Fixings8
Fibre Optic Connectors8
Section 4: Rear Terminal Drawings9
E6 Case9
Figure 4.1-1 E6 Standard Comms (USB Front Port, Rear RS485) (See Note 2)9
Figure 4.1-2 E6 Standard + Additional Comms (IRIG-B, 2 X F.O. (ST Connectors))9
Figure 4.1-3 E6 Standard + Additional Comms (IRIG B + RS485) (See Note 2)10
Figure 4.1-4 E6 Standard + Additional Comms (IRIG B + RS232)10
E8 Case11
Figure 4.2-1 E8 Standard Comms (USB Front Port, Rear RS485) (See Note 2)11
Figure 4.2-2 E8 Standard + Additional Comms (IRIG B, 2 X F.O. (ST Connectors))11
Figure 4.3-1 E8 Standard + Additional Comms (IRIG B + RS485) (See Note 2)12
Figure 4.3-2 E8 Standard + Additional Comms (IRIG B + RS232)12
Section 5: Connection/Wiring/Diagrams13
Wiring Diagram: 7SR21 OC/EF Relay13
Figure 5.1-1 Connection Diagram for 7SR21 Relay13
Wiring Diagram: 7SR22 Directional OC/EF Relay14
Figure 5.2-1 Connection Diagram for 7SR22 Relay14
Section 6: Data Comms Connections15
Standard RS485 Connections15
IRIG-B Connections15
Figure 6.1-1 RS485 Data Comms Connections between Relays15
Additional (Optional) Fibre Optic Connections16
Figure 6.3-1 Data Comms to Multiple Devices Using 7SG24 and F.O. Star Network16
Figure 6.3-2 Data Comms to Multiple Devices Using 7SG24 and F.O. Ring Network16
Additional (Optional) RS485 Connections17
Additional (Optional) RS232 Connections17
Figure 6.4-1 RS485 Data Comms Connections between Relays17
Figure 6.5-1 RS232 Data Comms Pin Connections17
Additional (Optional) Ethernet Connection for IEC 6185018
Figure 6.5-1 Ethernet Connection for IEC 61850 (Star Connection)18
Figure 6.5-1 Ethernet Connection for IEC 61850 (Ring Connection)18
Section 7: Connection Diagrams19
Typical Connection: 7SR22 Directional OC/EF and REF19
Figure 7.1-1 7SR22 Applied to Transformer Incomer19
Typical Connection: 7SR22 Directional OC/EF and NVD20
Figure 7.2-1 7SR22 Applied to Transformer Incomer Including HV NVD Protection20
Typical Connection: 7SR22 Directional OC/EF and NVD21
Figure 7.3-1 7SR22 Applied to Feeder Including NVD Protection21
Typical Connection: 7SR22 Directional OC/EF and NVD22
Figure 7.4-1 7SR22 Applied to Feeder22
Typical Connection: 7SR22 Directional OC and EF23
Figure 7.5-1 7SR22 Applied to Feeder - no Zero Sequence Voltage Source23
Typical Connection: 7SR22 Connected to Vts and Capacitor Cone Unit24
Figure 7.6-1 7SR22 Applied to Feeder with Capacitor Cones Fitted24

Siemens 7SR210 - 1.2 Binary Inputs

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