Execute Checks; General Information; Protection-Function Test - Siemens SIPROTEC 5 Operation Manual

Maintenance, On-the-Spot Assistance and Test

9.1 Execute Checks

9.1

Execute Checks

General Information

9.1.1
No special maintenance is required for SIPROTEC 5 devices. The only maintenance measure is to replace
batteries. All measurement- and signal-processing circuits are designed full-static. All input modules are also
static, the binary outputs are equipped with protective covers.
Since the device is mainly self-monitoring, hardware and software errors are automatically forwarded. This
minimizes any downtime of the device. It also eliminates frequent maintenance inspections.
Repeat Test
A routine test of characteristics or pickup values is unnecessary since this is part of the continuously monitored
firmware programs. As long as you make no changes in the pickup values or characteristics, a test is not
necessary.
Use the specified maintenance intervals to check and maintain the station and check the protection and
control equipment. The primary purpose of maintenance is to check the interfaces of the SIPROTEC 5 device,
that is, the coupling to the system.
If you discover a failure, follow the instructions in the corresponding chapters for failure search or call the
Siemens hotline.

Protection-Function Test

9.1.2
General
NOTE
i
i
When performing a protection-function test, make sure that it does not lead to any undesired tripping.
Likewise no information must be transmitted to a higher-level systems control where the operator may
incorrectly interpret it.
Make sure that the green RUN LED on the front cover lights up and not the red ERROR LED. This is how
²
the device indicates that it is properly functioning and that no failures have been observed during self-
monitoring.
Make sure that the LEDs on the front cover present a plausible image of the actual state of the device. If,
²
for example, the tripping of a protection function is saved as an LED display, the device has fault indica-
tions and a fault record for this purpose.
Press the LED test key. All LEDs apart from the red ERROR LED light up. Stored LED displays are reset and
²
only those states currently indicated by the device are shown.
Read the operational measured values and compare them to the actual measurands to control the analog
²
inputs. To do this, enter a reference quantity into the device using secondary test equipment. This is how
you check the proper operation of the analog section of devices.
Read the operational indications. You can do this directly on the device or following a clearly arranged
²
procedure using the DIGSI 5. Make sure that they do not contain inputs about failures of the device, of
measurands or other implausible information.
If the protection equipment has picked up or disabled an error, you can verify this through the fault
²
record and the fault log. This is how the protection equipment demonstrates its correct operation in the
operating state. Additional protection-function tests can be omitted.
178 SIPROTEC 5, Operation, Manual
C53000-G5040-C003-7, Edition 06.2016