Section 6: Other Features; Data Communications; Maintenance - Siemens Argus 7SR21 Technical Manual

Section 6: Other Features

6.1

Data Communications

Two communication ports, COM1 and COM2 are provided. RS485 connections are available on the terminal
blocks at the rear of the relay (COM1). A USB port, COM 2, is provided at the front of the relay for local access
using a PC.
Optionally, additional communication ports are available: -
2x fibre optic with ST connectors and 1x IRIG-B – (COM3 and COM 4),
1x RS485 and 1x IRIG-B – (COM 3),
1x RS232 and IRIG-B – (COM 3),
2x Electrical Ethernet with RJ45 connectors IEC 61850 - (COM 3 and COM 4),
2x Optical Ethernet with Duplex LC 100BaseF connectors IEC 61850 - (COM 3 and COM 4).
Communication is compatible with Modbus-RTU, IEC60870-5-103 FT 1.2, DNP 3.0 and IEC 61850 transmission
and application standards.
For communication with the relay via a PC (personal computer) a user-friendly software package, Reydisp
Evolution, is available to allow transfer of relay settings, waveform records, event records, fault data records,
Instruments/meters and control functions. Reydisp Evolution is compatible with IEC60870-5-103.
Data communications operation is described in detail in the Data Communications Definitions section.
6.2

Maintenance

The following CB maintenance counters are provided:
CB Total Trip Count:
CB Total Trip Manual Open
CB Delta Trip Count:
CB Delta Trip Manual Open
CB Count to AR Block: (Only in Auto-reclose
models)
CB Count to AR Block Manual Open: (Only in
Auto-reclose models)
CB Frequent Ops Count
Unrestricted ©2018 Siemens Protection Devices Limited
7SR210 & 7SR220 Description of Operation
Increments on each trip command issued.
Selects whether the CB Total Trip Counter is incremented for
Manual Open Operations. If disabled, the CB Total Counter
will only increment for protection trip commands.
Additional counter which can be reset independently of the
Total Trip Counter. This can be used, for example, for
recording trip operations between visits to a substation.
Selects whether the CB Delta Trip Counter is incremented for
Manual Open Operations. If disabled, the CB Delta Trip
Counter will only increment for protection trip commands.
Displays the number of CB trips experienced by the CB
before the AR is blocked. When the target is reached the
relay will only do 1 Delayed Trip to Lockout. An output is
available to reset this value.
Selects whether the CB Count to AR Block is incremented for
Manual Open Operations. If disabled, the CB Count to AR
Block will only increment for protection trip commands.
Logs the number of trip operations in a rolling window period
of one hour. An output is available to reset this counter.
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