PTE-300-V
Sheet 29
4. FUNCTIONS: USE AND DESCRIPTIONS
Throughout this section a detailed description of the use and procedures for the PTE-300-V will be given.
This unit has been designed to be used as a portable three-phase unit to test any kind of relays, as a
stand-alone unit or interconnected to other auxiliary units. All the functions that are incorporated in this
unit were designed to easily test the relays. This is achieved, as all functions are located on the front
panel in a manual mode, which before required test units, which were programmable by an external
computer.
Furthermore, the PTE-300-V, and thanks to the BUS-PTE, can be easily interconnected to other units in
the PTE range, making the specific functions for relay testing, much more simple and effective.
4.1. FREQUENCY SECTION
This section describes the functions of the internal frequency generator incorporated in the PTE-300-V. It
is obvious that this is combined with the power output to be effective. Furthermore, when used in ∆F (slip
frequency) mode, the external reference input must be used.
4.1.1. INITIAL STATUS
When the unit is turned on the frequency generator has the following values and readings:
1. Initial frequency: this is 50.00 or 60.00 Hz. It depends on the frequency ordered when the unit
was purchased.
2. Function mode: enters in the Normal Frequency (F).
3. Reference of the unit: it will synchronize the voltage output to the internal frequency generator
(Freq).
In summary, if a voltage or current value is selected, this will be in the output with the frequency at 50
or 60 Hz, as the frequency display indicates. If you turn the rotating knob, this frequency value will
change, and the output frequency is instantaneously actualized to the actual display value.
4.1.2. FUNCTION MODE SELECTION
The Internal Frequency Generator (I.F.G.) has two function modes: Normal Frequency and
Differential Frequency. To select one or another, use the press key MODE, which will indicate the
state by the LED indicators located below F or ∆F. The following explains these frequency modes.
4.1.2.1. NORMAL FREQUENCY MODE (F)
In this mode the I.F.G. acts as an absolute frequency generator, that is, the values indicated in the
display are the actual frequency output in Hz. The active range is 40 to 300 Hz.
• When we select a new value, the frequency is instantaneously actualized.
• It is capable to be programmed with different parameters in a way that it can automatically
perform different frequency ramps or steps.
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