Can I use it whitout accessories? How many accessories can I use with?
Yes, it can work without any accessories, depending on the test you wish to perform on the site. The only test that it is not available without accessories would be the primary/secondary analysis (Ratio Test).
The accessories available are 3 phases Rogowski coils rated at 2500A max (ST-3/FLEX-CT2500), Voltage Transducer rated at 600 Volts max (ST-3/PT600), and two interface adapters to use with the SensorLink® Amp LiteWire (ST-3/ALW) and Volt LiteWire (ST-3/VLW) for overhead (pole mounted) installations.
The accessories are 15 ft long. Cable extensions are available for purchase. The extension cable is used when the primary CT or PT is far from the meter installation.
They are compatible with ST-3/FLEX-CT2500 and ST-3/PT600 accessory.
When using one of these extensions on primary current or primary voltage accessory previously described, the performance of the accessory will be derated.
The table below shows which installed accessory is needed or not for the supported tests.
CT Secondary Burden
How does the ST-3/XT3 works?
ST-3/XT3 : Transformer Rated Wireless Site Tester This unit is a socket type tester, that obtains the reading directly from the secondary of the current and potential transformers. It does not require any external load to perform tests and it is ...
What is the procedure when installing the tester?
The ST-3/XT3 is compatible with CT rated installations forms 3S, 4S, 6S, 8S and 9S, it is also compatible with installation forms 5S, 35S and 45S using the included adapter. Before testing a CT rated installation in the field, always make sure that ...
Are all accessories compatible with all tester models?
Most accessories are compatible with all models. You can use older accessories with new tester models. If you own 20-25 years old accessories, some might not be compatible with the new generation models (i.e. pulse pickup PW-9071), but all new ...
How about yearly calibration of the tester? Do the accessories need to be calibrated?
The units are calibrated at the factory before delivery to your facilities. We suggest verifying accuracy of the testers using the build in accuracy test in the application at least once a year or as per local PUC or company regulations to ensure ...
Does any of the meter tester come with accessories?
The WT comes in a shock resistant carrying bag. The bag has individual compartments for the test socket, the pickups and the Users Guide. There is also enough space for small accessories such as the magnetic adapter for the optical pickup, seals, ...