1 Introduction
1.1 Receiving Instructions
When received, any possible transport damage should be noted. A written record should be made
of any damage. A suitable remark should be recorded on the delivery documents.
A claim for damage must be reported immediately to the transport company and to the Customer
Support Department of HAEFELY TEST AG or the local agent. It is essential to retain the
damaged packing material until the claim has been settled.
Check the contents of the shipment for completeness immediately after receipt (See chapter
“Scope of Supply”). If the shipment is incomplete or damaged then this must be reported
immediately to the transport company and the Customer Support Department of HAEFELY TEST
AG or the local agent. Repair or replacement of the instrument can then be organised
immediately.
1.2 General
The Tettex 2293 is the result of extensive research and years of experience testing transformers.
It incorporates a fast and highly advanced procedure to measure winding resistance. A simple
one-time-connection system together with the simultaneous winding magnetization method
drastically reduces measuring time.
The simultaneous winding magnetization (SWM) method guarantees fast and reliable
measurements even on large power transformers with delta windings on the low voltage side,
where stable measurements can be seldom reached using traditional winding resistance
measurement instruments.
In addition, the new demagnetization function eliminates the magnetic remanence in the core
after the application of a DC voltage. This feature can be used before performing other tests such
as frequency response analysis (FRA), transformer turns ratio measurement (TTR) or recovery
voltage measurement (RVM) which are adversely affected by remanence effects.
The transformer is discharged by a state-of-the-art discharge circuit in a fraction of the time taken
by other instruments. The discharging function and the “Caution” indicator continue to operate
even when line power is lost.
1.3 Scope of Supply
1.3.1 Standard scope of supply
The following items are supplied with the standard instrument:
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