Hardware Measurement Tests - Siemens Reyrolle 7SR5 Manual

Functional Tests

9.2 Hardware Measurement Tests

9.2 Hardware Measurement Tests
Binary Inputs
The operation of the binary input(s) can be monitored on the Binary Input Meters display shown in Instru-
ments Mode. Apply the required supply voltage onto each binary input in turn and check for correct opera-
tion. Depending on the application, each binary input may be programmed to perform a specific function;
each binary should be checked to prove that its mapping and functionality is set as part of the Scheme Opera-
tion tests.
Where the pick-up timers associated with a binary input are set these delays can be checked either as part of
the scheme logic or individually. To check a binary pick-up time delay, the binary input can be temporarily
mapped to an output relay that has a normally open contact. This can be achieved in the Output Matrix sub-
menu by utilizing the BI n Operated settings. Use an external timer to measure the interval between binary
input energization and closure of the output contacts. Similarly, to measure the drop-off delay, map the binary
input to an output relay that has a normally closed contact, time the interval between binary input de-energi-
zation and closure of the output contacts.
NOTE
i
i
The time measured will include an additional delay, typically less than 20 ms, due to the response time of
the binary input hardware, software processing time and the operate time of the output relay.
BI Tested
1
2
3
4
5
6
7
8
9
10
11
12
13
Binary Outputs
A minimum of 8 output relays are provided. 2 of these have change over contacts, BO1 and BO2. BO3
provides a normally closed contact, typically used to indicate device health. 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 energization can cause contact failure due to exceeding the break capacity when connected to
inductive load such as electrically reset trip relays.
Contacts can be operated from Reydisp Manager for testing purposes. Relay – Control - Close output relay.
This function will energize the output for its minimum operate time. This time is specified in the Configura-
tion > Binary Outputs > Binary Output Config menu for each output relay and may be too short to measure
manually with a continuity tester.
An alternative method of energizing an output permanently so that wiring can be checked is to temporarily
map the relay being tested to the Protection Healthy signal in the Output Matrix, as this signal is perma-
nently energized the mapped relay will be held energized, normally open contacts will be closed and normally
closed contacts will be opened.
406
DO Delay Measured PU Delay
Setting Setting
Measured Notes (method of initiation)
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019