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Multi Position Test Systems

Single and three-phase standard and customer specified test systems meeting the changing needs of the metering world. Test systems are available with fixed meter racks or with moveable trolleys and gantries to fulfil different requirements and increased test capacity

MTEoffers a broad range of customized high precision test systems for customers such as utilities, meter manufacturers and meter test laboratories.
The individual system components of a MTE meter test system are modularly developed and can be combined in any order for testing of single- and three-phase meters with or without closed I-P links. This modular design gives flexibility and enables MTE to provide the optimal customer orientated solution for each single- or three-phase meter test system the customer requires to meet the changing needs in the metering world.
MTE offers and respects the importance to upgrade existing test systems and provides solutions to gradually replace existing systems with modern components. Whatever the needs, wherever the customers, MTE has the innovative solutions and the focus to contribute to the efficiency, profitability and quality of our customers.

If the meters under test do not allow opening the I-P links, then there is an unwanted connection between
voltage and current path at every meter position.
Because of these connections, the line (input) and load (output) of each current measurement element
are forced to be at the same potential, an effective short-circuit path exists across the current measuring
circuit of every meter under test, causing a large measurement error. It is therefore not possible to test
multiple meters with closed I-P connections on a conventional meter test installation without additional
facilities. To be able to test these types of meters, galvanic isolation must be provided between the
current and voltage circuits of each meter under test. This isolation must ensure that the closed I-P links
in the meters do not cause these unwanted short-circuits and the resultant measurement errors. With
single-phase meters, galvanic isolation can theoretically be carried out using either voltage or current
isolation transformers.
In this case, a connected I-P link does not cause a short-circuit, as this connection is now made on the
secondary side of the transformer, thus avoiding any direct connection with the other meters in the circuit.
For the testing of multiple single-phase meters with fixed / closed links between the voltage and current
path (I-P links), galvanic isolation must be provided at each test position. In practice this is normally done
by connecting the voltage circuit of every meter under test, through a high accuracy voltage transformer
(MSVT). For cost reasons a voltage transformer with several galvanically isolated secondary windings is