Siemens 7SR157 Argus, Manual

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7SR157 Technical Manual
©2016 Siemens Protection Devices Limited Chapter 6 - Page 6 of 14
Note. The time measured will include an additional delay, typically less than 20ms, due to the response time of
the binary input hardware, software processing time and the operate time of the output relay.
BI Tested DO
Delay
Measured PU
Delay
Measured Notes (method of initiation)
1
2
3
4
5
6
1.6 Binary Outputs
Either 5 or 8 Binary Output relays are provided, depending upon ordering option. Two of these, BO1 & BO2, have
change-over contacts and the remainder have normally open contacts.
Care should be observed with regard to connected devices when forcing contacts to operate for test purposes.
Short duration energisation can cause contact failure due to exceeding the break capacity when connected to
inductive load such as electrically reset trip relays.
Close each Binary Outputs in turn using the Reydisp Evolution PC programme. This function will energise each
output for its set minimum operate time. This time is specified in the Output Config\Binary Output Config sub
menu for each output relay and may be set to too short a time to register with a continuity tester. It should
therefore be increased to a time suitable for the actual test equipment used.
An alternative method of energising an Binary Output relay permanently, so that wiring can be checked, is to
temporarily map the relay being tested to the ‘Protection Healthy’ signal. As this signal is permanently energised,
the particular mapped relay will be permanently held energised. Normally-open contacts will close and, for BO1
and BO2, normally-closed contacts will open.
BO Checked Notes (method of test)
1NO
1NC
2NO
2NC
3
4
5
6
7
8
1.7 Relay Case Shorting Contacts
The terminals of normally closed contacts of Binary outputs 1 & 2 are fitted with case mounted shorting contacts
which provide a closed contact when the relay is withdrawn from the case. The operation of these contacts should
be checked.
Binary Output 1 terminals 1 & 2 Alarm Checked?
Binary Output 2 terminals 5 & 6 Alarm Checked?