SMC Networks PTE-300-V User manual

INSTRUCTIONS MANUAL
PTE-300-V
THREE PHASE RELAY TEST SET
EDITION: 1/2/98
VERSION: 1.10

“The priority of EUROSMC, S.A. is to obtain the highest standards and quality in all
our products, serving to satisfy the expectations and necessities of our clients”.

PTE-300-V
Sheet 2
INDEX
PTE-300-V CONTENTS LIST.................................................................................................................. 5
1. INTRODUCTION................................................................................................................................ 6
1.1. MAIN FUNCTIONAL FEATURES.................................................................................................. 6
1.2. APPLICATIONS............................................................................................................................ 7
2. OPERATIONAL PRINCIPLES............................................................................................................ 9
2.1. GENERAL..................................................................................................................................... 9
2.2. FRONT PANEL CONTROLS....................................................................................................... 10
2.3. INTELLIGENT GENERATOR MODULE...................................................................................... 11
2.4. POWER SUPPLY........................................................................................................................ 11
3. CONTROLS DESCRIPTION............................................................................................................ 12
3.1. MAIN SUPPLY SECTION............................................................................................................ 12
3.1.1. MAIN VOLTAGE SUPPLY................................................................................................. 12
3.1.2. FIXED 110 V c.a. VOLTAGE SUPPLY............................................................................... 13
3.2. FREQUENCY SECTION............................................................................................................. 13
3.2.1. CONTROL KEYS AND KNOBS......................................................................................... 13
3.2.1.1. Mode funtion....................................................................................................... 13
3.2.1.2. Ramp parameters selection................................................................................ 14
3.2.1.3. Start the selected ramp....................................................................................... 14
3.2.1.4. Regulation digit selection.................................................................................... 14
3.2.1.5. Rotating control knob.......................................................................................... 14
3.2.2. DISPLAYS AND OPTIC INDICATORS.............................................................................. 15
3.2.2.1. Function MODE indicators.................................................................................. 15
3.2.2.2. Ramp indicators.................................................................................................. 15
3.2.2.3. Selection indicators............................................................................................. 16
3.2.2.4. Selection display................................................................................................. 16
3.2.3. CONNECTORS: Auxiliary Frequency Output..................................................................... 16
3.3. POWER OUTPUTS..................................................................................................................... 17
3.3.1. LEVEL SECTION .............................................................................................................. 18
3.3.1.1. CONTROL KNOBS AND PRESS KEYS ............................................................. 18
3.3.1.2. OPTICAL INDICATORS AND DISPLAYS........................................................... 20
3.3.1.3. TAPS: Output taps.............................................................................................. 22
3.3.2. PHASE SECTION ............................................................................................................. 23
3.3.2.1. CONTROL KNOBS AND PRESS KEYS ............................................................. 23
3.3.2.2. OPTICAL INDICATORS AND DISPLAYS........................................................... 24
3.4. GENERAL CONTROL SECTIONS.............................................................................................. 25
3.4.1. CONTROL KEYS .............................................................................................................. 25

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Sheet 3
3.4.1.1. Reset.................................................................................................................. 25
3.4.1.2. Print ................................................................................................................... 25
3.4.1.3. RS-232 serial port control ................................................................................... 25
3.4.1.4. SYNCHRONIZATION......................................................................................... 26
3.4.1.5. MASTER/SLAVE control..................................................................................... 26
3.4.2. OPTIC INDICATORS ........................................................................................................ 26
3.4.2.1. RS-232 port indicator.......................................................................................... 26
3.4.2.2. SYNCHRONIZING REFERENCE indicators ....................................................... 26
3.4.2.3. Monitor state indicator ........................................................................................ 27
3.4.3. CONNECTORS AND FUSES............................................................................................ 27
3.4.3.1. Monitor input taps............................................................................................... 27
3.4.3.2. Auxiliary output to start an external timer ............................................................ 27
3.4.3.3. RS-232 connector............................................................................................... 28
4. FUNCTIONS: USE AND DESCRIPTIONS........................................................................................ 29
4.1. FREQUENCY SECTION............................................................................................................. 29
4.1.1. INITIAL STATUS............................................................................................................... 29
4.1.2. FUNCTION MODE SELECTION........................................................................................ 29
4.1.2.1. NORMAL FREQUENCY MODE (F).................................................................... 29
4.1.2.2. SLIP FREQUENCY MODE (∆F) ......................................................................... 30
4.1.3. DYNAMIC TEST: SELECTING FREQUENCY RAMPS...................................................... 30
4.1.4. DYNAMIC TEST: START THE SELECTED RAMP............................................................ 31
4.1.5. DYNAMIC TEST: STEP TO 2ND VALUE ............................................................................ 31
4.1.6. TTL AUXILIARY OUTPUT: CHARASTERISTICS AND APPLICATIONS............................ 31
4.2. LEVEL SECTION: OUTPUT POWER.......................................................................................... 31
4.2.1. INITIAL STATUS............................................................................................................... 32
4.2.2. OUTPUT MODE SELECTION (V/I).................................................................................... 32
4.2.3. OUTPUT RANGE SELECTION......................................................................................... 32
4.2.4. REFERENCE SOURCE SELECTION................................................................................ 32
4.2.5. OUTPUT VALUES SELECTION........................................................................................ 33
4.2.6. OUTPUT CONTROL: ON/OFF AND ALARMS................................................................... 33
4.2.7. DYNAMIC TESTS: STEP TO 2ND VALUE.......................................................................... 34
4.3. PHASE ANGLE SELECTION...................................................................................................... 34
4.3.1. PHASE ANGLE SENSE.................................................................................................... 34
4.3.2. DYNAMIC TESTS: STEP TO 2ND VALUE.......................................................................... 36
4.3.3. USE OF EXTERNAL REFERENCE INPUT ....................................................................... 36
4.4. GENERAL CONTROL SECTION ................................................................................................ 37
4.4.1. SIGNAL MONITOR ........................................................................................................... 37
4.4.2. USE OF THE MASTER/SLAVE PRESS KEY .................................................................... 37
4.5. COMMUNICATION IN BUS-PTE................................................................................................. 38
4.5.1. EVENTS IN BUS-PTE....................................................................................................... 38

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Sheet 4
4.5.2. EVENT TRANSMITTED BY A PTE-300-V......................................................................... 39
4.6. SPECIAL FUNCTIONS ............................................................................................................... 39
4.6.1. AUTO OFF........................................................................................................................ 39
4.6.2. FAILURES DETECTION ................................................................................................... 40
5. SPECIFICATIONS ........................................................................................................................... 42
5.1. FREQUENCY GENERATOR....................................................................................................... 42
5.2. POWER GENERATORS............................................................................................................. 43
5.3. EXTERNAL REFERENCE INPUT............................................................................................... 44
5.4. SIGNAL MONITORS................................................................................................................... 44
5.5. AVAILABLE REFERENCES........................................................................................................ 44
5.6. CONTAINER............................................................................................................................... 44
6. TECHNICAL ASSISTANCE, AFTER SALES SERVICE AND WARRANTY....................................... 45
6.1. WARRANTY ............................................................................................................................... 45
6.2. AFTER SALES SUPPORT.......................................................................................................... 45
6.3. OTHER EUROSMC PRODUCTS................................................................................................ 45
FIGURES INDEX
Figure 1: PTE-300-V Front Panel ............................................................................................................ 8
Figure 2: Functional Modules .................................................................................................................. 9
Figure 3: Front Module.......................................................................................................................... 10
Figure 4: Intelligent Generator Module................................................................................................... 11
Figure 5: Main Supply ........................................................................................................................... 12
Figure 6: Frequency Section.................................................................................................................. 13
Figure 7: Power Output......................................................................................................................... 17
Figure 8: Level Selection....................................................................................................................... 18
Figure 9: Phase Angle Selection............................................................................................................ 23
Figure 10: General Control Sections...................................................................................................... 25
Figure 11: Signal Monitor ...................................................................................................................... 27
Figure 12: Frequency Ramp Selection................................................................................................... 30
Figure 14: Phase Angle Selection (European) ....................................................................................... 35
Figure 15: Phase Angle Selection (American)........................................................................................ 35

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Sheet 5
PTE-300-V CONTENTS LIST
•1 Unit PTE-300-V.
•1 Nylon cover.
•1 Voltage supply cable type Schuko.
•12 Interconnection cables 2.5 mm2 section (6 reds and 6 blacks).
•1 Interconnection cable between PC and PTE-300-V unit, by RS-232.
•1 PTE BUS interconnection cable for two units.
•1 Interconnection cable for frequency external output PTE-300-V type BNC.
•4 Clips up to 50 A (2 reds and 2 blacks).
•4 Clips up to 10 A (2 reds and 2 blacks).
•Replacement fuses:
−4 Fuses 5x20 100 mA, fast.
−4 Fuses 5x20 400 mA.
−2 Fuses 5x20 500 mA.
−4 Fuses 5x20 630 mA, fast.
−2 Fuses 5x20 2 A.
−4 Fuses 5x20 12 A, fast.
−4 Fuses 5x20 6.3 A, fast.
•1 Case key.
•1 Warranty.
•1 Measurement Certificate.
•1 Instructions Manual.
•Equipment with 220 V ac voltage supply:
−2 Fuses 5x20 5 A, included in the assembly switch ON/OFF.
•Equipment with 125 V ac voltage supply:
−2 Fuses 5x20 10 A, included in the assembly switch ON/OFF.

PTE-300-V
Sheet 6
1. INTRODUCTION
The PTE-300-V is designed as a Portable Three Phase Unit that allows the user to test, as stand alone
unit or in combination with others, all type of protective relays.
Extremely compact and rugged, this unit incorporates the latest in the modern microprocessor technology
to achieve unbeatable output characteristics in terms of power, accuracy, low distortion, and dynamic
capability. This technology allows the unit to perform, without any external accessories, various specific
functions very often used in the relay testing.
All the output signals are digitally generated, amplified and controlled by the internal IGM’s (Intelligent
Generation Modules) in terms of amplitude, phase and frequency. A high accuracy and stability are
obtained in the output waveforms, which are absolutely independent of the main supply.
Contained in an aluminum IP-65 case, with a membrane keyboard that allows full manual control, and a
RS-232 com port for computer control, the PTE-300-V offers the best features actually available for on
site manual or automatic relay testing.
1.1. MAIN FUNCTIONAL FEATURES
The following are the more outstanding functions/features that the PTE-300-V has:
a) INTERNAL FREQUENCY GENERATOR
Allows the user to work in any frequency between 40 and 300 Hz. Also, frequency ramps and
steps can be easily preprogrammed from the front panel controls allowing testing the most
complex frequency, harmonics and synchronizing relays. The differential mode allows regulating
frequency differences respect to an Extern Reference, with a resolution of 1 mHz.
b) AVAILABLE REFERENCES
The power output has four different references available:
•Internal Frequency Generator (Freq.).
•The main supply phase (Line).
•The PTE BUS (BUS).
•The External Phase Reference (current or voltage).
c) POWER OUTPUTS
The voltage or current outputs are available, up to 300 V in three ranges and up to 8 A in two
ranges respectively.
Any power outputs combination is possible: two channels can work in voltage mode and the
other one in current mode, or even all of them can work in current mode. In current mode, the unit
allows channels parallel connection so it can supply up to 3 x 8 A = 24 A.
All the outputs have a dynamic capability. The output regulation can work independently or
linked in a three phase system, when PTE units are working together interconnected through
the PTE BUS, any combination of dynamic steps to 2nd values, can be selected in amplitudes and
phase angles for any type of fault simulation.

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Sheet 7
d) EXTERNAL REFERENCES INPUT
Can be synchronized, in terms of frequency and phase with any external signal, from 0.1 to 25 A
in current, and from 5 to 300 V in voltage.
e) SIGNAL MONITOR
The unit has a Signal Monitor input that can work with dry contacts or with voltage signals from 5
to 250 V ac or dc.
f) RS-232 COM PORT
Used to control the equipment from an external computer, can be used to perform the following:
•Software calibration.
•Automatic testing.
•Direct printing of the test results in a RS-232 input printer.
g) PTE BUS
Allows the interconnection with any other unit of the PTE RANGE.
h) EXTERNAL TIMER CONTROL OUTPUT
Delivers a pulse signal, dry contact type, of 20 ms duration. This can be used to start an external
timer, for timing measurements. This signal is produced every time one of the power outputs
changes its status, or the Step key is activated in amplitude or in phase.
i) OUTPUT PROTECTION
The outputs and, in general, the unit, are electronically protected against overload, short-circuit
and over temperature. These alarms are indicated on the Front Panel.
Standard 5 x 20 mm fuses protect the rest of inputs and general devices included in the unit.
1.2. APPLICATIONS
a) AS STAND ALONE TESTING UNIT
•Frequency relays.
•Load sharing relays.
•Synchronizing relays.
•Multifunction generator protection relays.
•Harmonics relays.
•Overcurrent relays (up to 24 A).
•Inverse time overcurrent relays.
•Definite time overcurrent relays.
•Earth and neutral (including harmonics filtering).
•Voltage controlled relays.
•Directional relays.

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Sheet 8
•Differential relays.
•Single phase distance relays.
•Three-phase distance relays (open delta).
•Directional power relays (single and three-phase).
•Maximum and minimum voltage relays.
•Dynamic test: fault simulation.
b) COMBINED WITH A SINGLE PHASE CURRENT INJECTOR
•Three-phase distance relays.
•Full three-phase network fault simulation.
•In general all types of relays which require 3 voltages and 3 currents to function correctly.
c) MISCELLANEOUS
Due to its good characteristics of accuracy and stability, the PTE-300-V can test transducers,
energy meters and measuring instruments can be tested as well, in the following range:
•Voltage in three-phase or single phase (up to 300 V).
•Three phase current up to 8 A (or 24 A single phase).
•Frequency between 40 and 300 Hz.
•Three-phase angle from 0º to 359.9º.
Figure 1: PTE-300-V Front Panel

PTE-300-V
Sheet 9
2. OPERATIONAL PRINCIPLES
2.1. GENERAL
In this section a general overview of the operational basic principles on which the PTE-300-V is based,
are given in this section. An understanding of these principles should help in order to find new
applications, maintenance, etc.
Briefly, the unit has a user interface (Front Panel), that is communicated with the Power Amplifier
through the microprocessors incorporated. Of course, a power supply, security devices, transformers,
etc. need to be used as well. According with these, the unit can be divided in the following modules:
1. Front Panel Controls.
2. Intelligent Generator Modules (IGM).
3. Power Supply.
PTE-300-V
Figure 2: Functional Modules

PTE-300-V
Sheet 10
2.2. FRONT PANEL CONTROLS
Allows the user to communicate with the power output section of the unit in a manual way, or using a
software program. To achieve this, it has the following sections:
1. Displays and LED indicators: indicate the various selections made by the operator and the
status of the unit.
2. Press key controls: this is a membrane keyboard with acoustic feedback, in which the various
different functions available in the unit are selected.
3. Multi-turn control knobs: these are rotative pulse generators that are used to make the different
selections desired on the displays indicators, in an easy and fast manner.
4. Monitor taps: contain the circuits to detect the status of the signals applied in these taps.
Figure 3: Front Module
5. External Reference Taps: contain the circuits to synchronize the power outputs to the phase
and frequency signals connected to these taps.
6. Communications: the PTE units have the capability to communicate with some external control
devices by RS-232 (allowing the user for printing results and calibration from the PC) and by
BUS-PTE, for interconnection with PTE RANGE units and control of these by a PC.
7. Internal Bus Interface: establishes the communication between the Front Panel and the
Intelligent Generator Module, via the microprocessors included in both.
8. Time Generator: it generates the high accuracy time reference necessary to generate the
internal phase and frequency.
9. Output taps: these are the taps of the auxiliary voltage supply of 110 V ac, the power output
taps, and the tap to start an external timer.

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Sheet 11
10.Microcontroller: it is one of the most important parts of the unit, which as its name indicates,
controls or establishes the flow of information between all the functional blocks previously
mentioned.
2.3. INTELLIGENT GENERATOR MODULE
Essentially, the IGM is a linear power amplifier, controlled by its internal microprocessor. It produces
the sinusoidal signal in the frequency and the phase selected. This is amplified and adapted by a
transformer in the selected output range. This generator also feedbacks the output level in voltage,
current, and phase, to the generation stage, thus achieving a high accuracy output.
Figure 4: Intelligent Generator Module
As shown in the block drawing and in the front panel control functions, a microprocessor is in charge
of supervising all the functions of the generator modules. These receive the output measurements and
make the corrections necessary in amplitude and phase to obtain the desired accuracy. Also they
store the calibration parameters, and use them to correct the selections made from the Front Panel.
2.4. POWER SUPPLY
As in all off the systems that produce an output which is absolutely independent of the main supply,
the PTE-300-V needs to have a D.C. power supply, that converts the AC input of the main supply, to a
DC that supplies the power amplifiers. This is achieved by using a combination of switching and linear
DC power supplies.

PTE-300-V
Sheet 12
3. CONTROLS DESCRIPTION
This section describes one by one and in detail all of the controls, indicators, displays, and connection
taps on the front panel of the PTE-300-V. As well as the functions, marked indications and where they are
located will be shown in the figures.
To understand this clearly, sections will describe the controls, by their functions, and by their physical
position on the front panel. The different types of controls that you can find are classified as follows:
•KEY CONTROLS: this refers to the press key and rotating knobs.
•DISPLAY AND OPTIC INDICATORS: this refers to the LED indicators and the selection displays.
•CONNECTORS (TAPS): this refers to all taps (input and output), connectors, etc., which are
contained in the PTE-300-V. This section describes all the connectors that are incorporated in the
unit. All of them meet international safety standards and are easily identified with their
corresponding identification marks on the front panel.
3.1. MAIN SUPPLY SECTION
3.1.1. MAIN VOLTAGE SUPPLY
The unit is supplied with SCHUKO type plug 2 poles with earth. Also
incorporated in the connector is a filter to avoid perturbations from the
main supply.
Figure 5: Main Supply
This is situated on the bottom left hand side of the unit and includes the following:
•Power supply with 2 poles and earth.

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Sheet 13
•Power supply fuse holder: to reach these fuses, the cover must
be lifted as indicated in the drawing. There are two fuses: the
lower one is the active fuse and the one located above is the
spare fuse. The fuses are standard type, 5 x 20 mm, 10 A.
•Power supply switch: it has 2 positions, ON/OFF. The unit is
disconnected when the red mark of the switch is visible.
3.1.2. FIXED 110 V c.a. VOLTAGE SUPPLY
This output is located in the lower central section to the right of the power supply switch. It consists of
2 black taps.
This output is always active when the unit is switched on. The taps have a distance of 19 mm which
is the standard two-pole plug size.
3.2. FREQUENCY SECTION
This section is located on the left-hand side of the unit and is clearly
marked. Contains all the control knobs, keys, and LEDs necessary for
the operator to use the frequency functions described in this section.
Figure 6: Frequency Section
3.2.1. CONTROL KEYS AND KNOBS
3.2.1.1. Mode function
This key works in a sequential way, when this key is pressed the LEDs will indicate
the option selected. The two options are:
1. Normal frequency mode (F).

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Sheet 14
2. Slip frequency or relative frequency mode (∆F).
3.2.1.2. Ramp parameters selection
The SET key works in a sequential way. It is associated with 6 LED
indicators. Each time this key is pressed it allows introducing a different
ramp parameter. The associated LED will indicate which one is being
selected. The ramp parameters available are as follows:
•Initial frequency value for the 1st ramp (Hz). This value acts as the
final value for the 2nd ramp.
•Frequency slope for the 1st ramp (Hz/s).
•Time duration that the final value of the 1sr ramp remains before
the beginning of the 2nd ramp (s).
•Final frequency value for the 1st ramp (Hz). ). This value acts as
the first value for the 2nd ramp.
•Frequency slope for the 2nd ramp (Hz/s).
•It is possible to select a frequency value, on which a pulse of 20
ms duration is produced at the Start Chrono output (Hz).
3.2.1.3. Start the selected ramp
This key starts the ramp previously selected by pressing the key. This ramp will
stop when it arrives to the programmed cycle or when there is a signal in the
monitor taps.
3.2.1.4. Regulation digit selection
This key works in a sequential way and it is associated with 3 LEDs located
above this press key. This allows the operator to select the output in a fine or
course regulation, by changing the digit to be adjusted.
The following resolutions can be obtained:
•1 digit.
•10 digits.
•100 digits.
When pressing this key for more than 2 seconds, it will block the rotating pulse generator, not
allowing any modifications to the level selected.
3.2.1.5. Rotating control knob
This is a rotating pulse generator and has step by step sensation. The
values can be increased or decreased by turning this control knob

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Sheet 15
clockwise or anti-clockwise by one digit per step, according to the selected digit weight as
described previously.
This knob has no end and can be controlled at any speed. However if the control knob is turned
very fast the value will change at a maximum rate of 1 digit per second.
3.2.2. DISPLAYS AND OPTIC INDICATORS
3.2.2.1. Function MODE indicators
These two 3mm LED (red), one will always be lit and indicates the frequency mode
function that is actually selected.
They are associated with the press key MODE.
3.2.2.2. Ramp indicators
They are six 2 mm red LEDs, which indicate the situation of the ramp, in the
selection level and when it is active. They have 2 different function modes:
1. Permanently lit: this indicates the selection mode. In this situation the operator can select
new values, which will be shown in the frequency display. At this stage the selected values
are not in the output. The relationship between the LEDs and the parameters that can be
selected is as follows:
LED 1: Indicates that the initial value of the first ramp can be selected. The value will be
shown in the display in Hz.
LED 6: Indicates that the Start Chrono frequency value can be selected. The value will be
shown in the display in Hz.
LED 2: Indicates that the frequency slope (rate of change) for the 1st ramp, from the initial
to the final value can be selected. It is in Hz per second, (Hz/s). If 0 is selected the
equipment will go directly (step) to the final value.
LED 4: Indicates that the final value of the 1st ramp can be selected. The value will be
shown in the display in Hz.
LED 3: It indicates that you can select the time duration in which the unit will remain in the
final value before starting the 2nd ramp. This value will be shown in the display in
seconds (s). When 0 is selected the unit will maintain the final value indefinitely.
LED 5: Indicates that the frequency slope (rate of change) for the 2nd ramp, from the final
to the initial value can be selected. It is in Hz per second, (Hz/s). If 0 is selected
the equipment will go directly (step) to the initial.
These LEDs are associated with the press key SET.

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Sheet 16
2. When flashing: this indicates that the ramp is active. When the Ramp key is pressed the
ramp will start. The LEDs will pass in successive order, indicating the state of the
equipment and the ramp in each moment.
3.2.2.3. Selection indicators
These three, 3 mm LEDs (red), indicate the digit to be regulated. Only one will
be lit and it will indicate the digit above it to be regulated
These LEDs are associated with the press key .
3.2.2.4. Selection display
The display is made up of 4 digits of 7 segments, red in color and 0.3 inches in height, which show
the selected value, and the units of the parameter selected which are located to the right of the
display.
It can work in three different modes:
•Hz (frequency).
•Hz/s (rate of change or slope).
•S (time duration in seconds).
When the output of the unit is not synchronized with this frequency generator, the display will
show “----” instead of the selection made, and all the controls in the frequency section will be
deactivated.
When working in the frequency ramp mode, and the Signal Monitor receives a signal (which
indicates a relay trip) the frequency display will hold the frequency value at the time of the trip
3.2.3. CONNECTORS: Auxiliary Frequency Output
This is a BNC conector that can be used to obtain a square form wave, TTL level, exactly
the same as the frequency being produced by the output, in real time.

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Sheet 17
3.3. POWER OUTPUTS
The equipment has three output and phase channels. In each one of them can be selected the desired
output level as well as the phase angle.
This section is situated in the central section of the unit, and is clearly identified. All the controls,
indicators, etc. contained in this part of the unit will be explained.
Figure 7: Power Output

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Sheet 18
3.3.1. LEVEL SECTION
Figure 8: Level Selection
3.3.1.1. CONTROL KNOBS AND PRESS KEYS
a) Selecting the digit to be used
This key works in a sequential way and it is associated with 3 LEDs located
above this press key. This allows the operator to select the output in a fine or
course regulation, by changing the digit to be adjusted.
The following resolutions can be obtained:
•1 digit.
•10 digits.
•100 digits.
When pressing this key for more than 2 seconds, it will block the rotating pulse generator,
not allowing any modifications to the level selected.
b) Rotating control knob
This is a rotating pulse generator and has step by step sensation. The values
can be increased or decreased by turning this control knob clockwise or anti-
clockwise by one digit per step, according to the selected digit weight as
described previously.

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Sheet 19
This knob has no end and can be controlled at any speed. However if the control knob is
turned very fast the value will change at a maximum rate of 1 digit per second.
c) Output ON/OFF selection
When this key is pressed the output will turn on and the LED situated below
will light up.
When it is pressed again it will disconnect this output and the LED will be off.
d) 2nd value selection
When this key is pressed it allows the selection of a 2nd value and it is shown in
the display. This selection does not cancel the value already selected in the
output at the moment. To distinguish the actual value from the 2nd value
selected, the LED over the key lit when the 2nd value is displayed.
e) Activating 2nd value
This key works in a sequential way. When pressed the output value changes to
the 2nd value, when it is pressed again it will return to the 1st value.
When this key and the similar key in the phase section are pressed at the same time for
more than 2 seconds this function if both sections becomes synchronized. To cancel you
must repeat this process.
f) MASTER/SLAVE: regulation modes
The following press keys are installed on the PTE-300-V
to achieve regulation capability in terms of three-phase
regulation, fault combinations, like a phase to phase,
three-phase, etc.
•Output channel 1 (CH1): MASTER key.
•Output channel 2 (CH2): SLAVE key.
•Output channel 3 (CH2): SLAVE key.
When no key is activated, the output channels are completely independent in all their
functions.
When the MASTER key of CH1 is activated, at least one slave must be activated also. The
MASTER function affects all channels in SLAVE mode (CH1, CH2 or both) as follows:
•Any output value change made in CH1, through the rotating knob in level or phase
angle, occurs immediately in the SLAVE channels.
•If the output mode (voltage or current) is changed in CH1, it changes immediately in
the SLAVE channels.