PTE-100-C PRO
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GENERAL OVERVIEW
Technology
The PTE-100-C PRO combines state-of-the-art digital technology with the
traditional regulation method based on a variable autotransformer and
transformer.
Analogue and digital electronics convert signals in- and out from the unit in
order to be processed and displayed by an 8-bit microprocessor.
The power section is based mainly on electromechanical components.
The unit’s layout is arranged in modules and the number of moving parts is
kept to a minimum for easy and safe operation.
Power Section Design
Classical, direct regulation and transformers are used to generate and con-
trol the high 1,000-VA power output, as shown in the following diagram:
1. An internal relay connects the main power supply to the variac un-
der no-load conditions.
2. The single-phase variable autotransformer (Variac) regulates the
voltage at the primary winding of the output power transformer.
3. A static switch (Triac) guarantees a clean connection and discon-
nection of the Variac from the power transformer’s input.
4. A toroidal transformer guarantees the insulation of the output from
the main power supply.
5. A current measurement transformer, with one primary winding and
two secondaries with 250:1 and 50:1 respective ratios, is con-
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