Siemens 7SR157 Argus, Manual

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Chapter 6 - 7SR157 Commissioning and Maintenance Guide
Chapter 6 - Page 3 of 14 ©2016 Siemens Protection Devices Limited
Section 1:
Common Functions
1.1 Overview
Commissioning tests are carried out to prove:
a) Equipment has not been damaged in transit.
b) Equipment has been correctly connected and installed.
c) Characteristics of the control and settings which are based on calculations.
d) Confirm that settings have been correctly applied.
e) To obtain a set of test results for future reference.
1.2 Before Testing
1.2.1
Safety
The commissioning and maintenance of this equipment should only be carried out by skilled personnel trained in
relay maintenance and capable of observing all the safety precautions and regulations appropriate to this type of
equipment and also the associated primary plant.
Ensure that all test equipment and leads have been correctly maintained and are in good condition. It is
recommended that all power supplies to test equipment be connected via a Residual Current Device (RCD),
which should be located as close to the supply source as possible.
The choice of test instrument and test leads must be appropriate to the application. Fused instrument leads
should be used when measurements of power sources are involved, since the selection of an inappropriate range
on a multi-range instrument could lead to a dangerous flashover.
1.2.2
Sequence of Tests
If other equipment is to be tested at the same time, then such testing must be co-ordinated to avoid danger to
personnel and equipment.
When cabling and wiring is complete, a comprehensive check of all terminations for tightness and compliance
with the approved diagrams must be carried out. This can then be followed by the insulation resistance tests,
which if satisfactory, allows the wiring to be energised by either the appropriate supply or test supplies.
When primary injection tests are completed satisfactorily, all remaining systems can be functionally tested before
the primary circuit is energised. Some circuits may require further tests before being put on load.
Protection relay testing will require access to the protection system wiring diagrams, relay configuration
information and protection settings. The following sequence of tests is loosely based on the arrangement of the
relay menu structure. A test log based on the actual tests completed should be recorded for each relay tested.
The Description of Operation section of this manual provides detailed information regarding the operation of each
function of the relay.
1.2.3
Test Equipment
Required test equipment is:
1. Automated Secondary injection test set with integral time interval meter.
2. Primary injection equipment.
3. A power source with nominal voltage within the working range of the relay's auxiliary supply rating.
4. A power source with nominal voltage within the working range of the relay’s binary input rating.
The secondary injection equipment should be appropriate to the protection functions to be tested. Additional
equipment for general tests and for testing the communications channel is:
5. Portable PC with appropriate interface equipment.
6. Printer to operate from the above PC (Optional).