How does the admitance test work?
By injecting a small audio signal of 1525 Hz into the CT secondary, then measuring the induced current of the audio frequency to determine the admittance value.
Analog filtering and programmable gain are used to get the best dynamic range for the DSP to compute the admittance @ 60Hz. While CT burden needs secondary current to achieve its purpose, the admittance needs small or no current (max 0.5A) on the secondary side.
If the current is higher than 0.5A, the test will not be conducted. All the phases are done sequentially. This test can be done with or without accessory.
What is the Secondary Burden test?
Secondary Burden test What is the Secondary Burden test? The Secondary Burden test is used to analyze the effect of a resistive burden on the behaviour of the CT. Within the ST-3/XT3 is an array of high accuracy resistors that can be, with the use ...
What is Admittance test?
Admittance test What is the Admittance test? This test is conducted by injecting a small, 1,525 Hz audio frequency into the CT secondary, then measuring the audio frequency's induced current to determine the admittance value. Analog filtering and ...
What is the Primary Secondary Analysis test?
Primary Secondary Analysis test What is the Primary Secondary Analysis test? This test is to ensure that the ratio between the primary current or voltage and the secondary current or voltage are the same as indicated on the transformers being ...
How many tests reports does the unit store internally?
The XT series tester’s embedded non-volatile memory can hold up to 8 MB of test report data. As a rule of thumb, the memory should hold around 1000 test reports. A test record is created when the operator opts to save the data of a completed test. ...
What is the Full test?
Full Test How does it work? The Full test is used to fully assess the quality of a meter, as it runs a complete sequence of sub-tests. The Full test runs an equivalent of the Quick Test followed by additional single-element tests. To execute a Full ...