The technical maintenance team completed the required repairs and conducted a complete protocol of routine commissioning tests, including a 10 kV line frequency LF power factor PF test. Auxiliary voltage tests of circuit breakers. Some of those tests are valuable to repeat in field tests, obviously to ensure that the CB fulfil its design specification, but those tests and some additional tests in similar spirit can also disclose potential future problems.
The most common is to vary the auxiliary voltage but it could also be other energy resources for example hydraulic and pneumatic pressure. This application note will focus of the auxiliary voltage, what the standard requires, sort out the terminology and what tests that are valuable to repeat in field tests.
Electric power transmission and distribution systems are vital for modern life. And, since the electricity these systems provide is essential, then these systems are essential too. One of the less celebrated components of these systems is the humble surge arrester.
These arresters serve the important job of keeping the electric supply smooth and steady. As such, these devices must be tested regularly as part of a maintenance program. May not post to Germany - Read item description or contact seller for postage options. See details. Located in:.
Manchester, United Kingdom. This amount is subject to change until you make payment. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab This amount includes applicable customs duties, taxes, brokerage and other fees. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab.
No returns accepted See details. International postage paid to Pitney Bowes Inc. Learn More - opens in a new window or tab International postage and import charges paid to Pitney Bowes Inc.
Learn More - opens in a new window or tab Any international postage and import charges are paid in part to Pitney Bowes Inc. Learn More - opens in a new window or tab Any international postage is paid in part to Pitney Bowes Inc. Learn More - opens in a new window or tab. Related sponsored items. Showing Slide 1 of 3. New New New. Seller Report item - opens in a new window or tab.
Description Postage and payments. Seller assumes all responsibility for this listing. Item specifics. New: A brand-new, unused, unopened and undamaged item in original retail packaging where packaging Read more about the condition New: A brand-new, unused, unopened and undamaged item in original retail packaging where packaging is applicable.
If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. See the seller's listing for full details. The current Client name is briefly displayed. For each asset a complete record is stored under the appropriate Client.
Each asset record holds full details of the equipment, i. Page Assets Assets Up to assets may be stored at any one time in the PAT4, each with their current and previous Historic test results. Appropriate asset details may be entered before or during testing. Once the asset record has been set and stored, it never needs to be re-entered. The next time the asset is tested, only the asset ID number needs be entered or scanned, and the PAT4 will recall the complete record with the correct Group code and all the asset details.
Page Locate An Asset Locate an Asset It may be necessary to locate and test an asset for the current Client for which only the Location, Test Group, or an approximate retest date is known. PAT4 will assume the same settings until you deliberately logout from the Client. Even if mains power is removed e. Page Historical Data Historical Data PAT4 incorporates a historic data facility that enables previous test results to be viewed at the time of testing.
This powerful feature enables you to spot any dangerous degradation of the appliance since its last test. Whilst previous and current test results may each be considered acceptable in their own right against the pre-defined limits, there are instances where two very different readings will indicate significant degradation of appliance safety.
Page Quick-Check Quick-Check It is often useful to perform a particular test on an asset in isolation. If for instance an asset had previously failed a particular test and had subsequently been repaired it may be useful to verify the repair before commencing with a full test sequence.
Alternatively the test could be used during repair in order to highlight the area at fault. The current may be set to 10A or 25A calibrated at 0. The PAT4 can store upto three separate earth bond test results for each asset test.
Pre-Test Prior to performing any of the main tests an initial check is performed to indicate an approximate value of appliance loop impedance. Abnormal results from this test displays a message indicating the conditions that may affect the validity of the tests to be performed, or where possible damage to the PAT4 may result. The earth leakage test determines whether any current is flowing to earth.
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