5-1
SECTION 5
TESTING
GENERAL
The test setups and procedures contained in this section are suggested for use in verifying or setting the
desired pickup frequency threshold, as well as the time delay parameters, for both the definite and
inverse time delay style of relay. Accuracy of the measurements in these procedures is dependent upon
the stability of the test frequency sources, and the resolution of the frequency and time measuring test
equipment. Functional tests performed with test equipment with an overall accuracy of less than the
accuracy of the relay may be useful to the extent that they verify relay operation and approximate relay
characteristics. However, tests performed under these conditions will not verify or produce calibrations
any better than the test equipment accuracy; as a result, tolerances may be outside of those specified.
TEST SETUP
Figure 5-1 illustrates a test setup using a commercially available frequency test set having frequency
and time generating accuracies exceeding those of the underfrequency relay.
Figure 5-1. Test Setup
To Next Page
Loading...
Need help?
General
