Notes on complaints Transformers
Almost 99% of damaged transformers have been damaged or destroyed by incorrect use, usually caused by an incorrectly connected primary winding or an incorrectly calculated current demand, causing the transformer to overheat and fail in whole or in part. An incorrect use of the transformer and the resulting damage is not covered by warrenty.
A simple check of the transformer using an ohmmeter can be done as follows. To do this, disconnect the transformer completely from the mains and the rest of the circuit. There must be no connection ! Also make sure that the batteries of the ohmmeter are fully charged.
- Measure the resistances of each winding and note them.
- Measure whether there is a connection from one winding to another winding.
- Measure if there is a connection from the winding to the laminated core of the transformer (NOT possible with toroidal transformers).
If a connection is found at either of the last two points, then the transformer is completely defective.
In many cases, the data sheet of the transformers already list the resistances of the windings so you can check your data with the data listed in the data sheet. If the measured values correspond to the specifications (deviations of +/- 20%) and no other connections were measured, then it can be assumed that the transformer is not defective and there is an othe rreason for the malfunction.
Please also note the measured values in the complaint field below.
A common fault with toroidal transformers is an interrupted connection of one of the stranded wires , especially with larger and heavier toroidal transformers. The reason for this issue is that the transformers are lifted up by the strands, which can cause one or more connections to break. Such a damage can not be repaired and is not covered by any warrenty.