AC power supply PCR-LE series

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Using Power Line Abnormality Simulations

In AC mode, you can simulate power supply line errors by stopping the PCR-LE Series output (to simulate power failures) and decreasing and increasing the voltage (to simulate voltage dips and pops).

Using Power Line Abnormality Simulations (Cont.)

Executing and stopping power line abnormality simulations

You can use this to test switching power supplies and other electronic devices.

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A sine wave is generated during the power line abnormality simulations. Even if you have set a special waveform, a sine wave will be generated as soon as you execute the power line abnormality simulation.

You can set these values while output is on or off.

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Parameter

Description

T1

This is the voltage regulation start time or the voltage regulation start phase.

This is the time or the phase from the waveform’s positive zero crossing (the point where the signal crosses the zero axis) to the point where voltage regulations - such as increases or decreases - start to occur.

T2

This is slope time 1.

For pops, this indicates how much time is required to raise the voltage to the pop voltage.

For dips, this indicates how much time is required to lower the voltage to the dip voltage.

T3

This is the voltage regulation time.

For pops, this indicates the length of time that the voltage will be kept at the voltage that it has been raised to (the pop voltage).

For dips, this indicates the length of time that the voltage will be kept at the voltage that it has been lowered to (the dip voltage).

T4

This is slope time 2.

For pops, this indicates how much time is required to lower the voltage from the pop voltage to the voltage that is in use during the period indicated by T5.

For dips, this indicates how much time is required to raise the voltage from the dip voltage to the voltage that is in use during the period indicated by T5.

T5

This is the return time or the number of return cycles.

This indicates how long (either as a length of time or as a number of cycles of the present frequency) the voltage will be kept at the level that it returns to after a pop or dip is completed.

T3VOLT

This is regulated voltage.

For pops, this is the voltage level that the voltage will be raised to (the pop voltage).

For dips, this is the voltage level that the voltage will be lowered to (the dip voltage).

LOOP

This is the number of repetitions.

This indicates the number of times that the sequence of steps defined by T1 to T5 will be repeated.

- Memo -

Voltage regulation start polarity

You can set the zero crossing (the time at which the voltage becomes zero) that will be the reference for T1 to positive zero crossing or negative zero crossing by switching the voltage regulation start polarity (POL). You can use this function to change the phase by 180 °. The PCR-LE Series displays the output voltage (waveform) of L of the OUTPUT terminal block, with N as its reference.

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Using Power Line Abnormality Simulations (Cont.)

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Power line abnormality simulation setup procedure

These settings cannot be made if you are using the synchronization function.

1

Set the steady-state voltage and frequency.

2

Press SIM and then COND (F4) to set the conditions. After you have finished configuring the settings, press ESC.

A border is displayed around the item that you are setting. Press ▲ (to select the upper item) and ▼ (to select the lower item) to switch between items.

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Item

Description

Valid mode

POL

-

Sets the voltage regulation start polarity to negative zero crossing

AC

+

Sets the voltage regulation start polarity to positive zero crossing

T1 TYPE

TIME

Sets the voltage regulation start using time

DEG

Sets the voltage regulation start using phase

T5 TYPE

TIME

Sets the duration that the voltage remains at the returned level using time

CYCLE

Sets the duration that the voltage remains at the returned level using cycles

3

Press EDIT (F5) to set the parameters (T1 to T5 and T3 VOLT). After you have finished configuring the settings, press ESC.

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Item

Title

Description

Valid mode

T1

T1 Time

Sets the voltage regulation start time (0.0 ms to 999.9 ms)

AC

T1 Degree

Sets the voltage regulation start phase (0 deg to 359 deg)

T2

T2 Time

Sets slope time 1 (0 ms to 99990 ms)

T3

T3 Time

Sets the voltage regulation time (0.1 ms to 9999.0 ms)

T4

T4 Time

Sets slope time 2 (0 ms to
99990 ms)

T5*1

T5 Time

Sets the return time (0 ms to 99990 ms)

T5 Cycle

Sets the number of return cycles (0 to 999900)

T3 VOLT

T3 Volt

Sets the regulated voltage (L range: 0 V to 152.5 V; H range: 0 V to 305.0 V)

*1. Depending on how T1 to T4 are set, this may lead or lag by one cycle.
If you set this to a value that is not an integer multiple of one cycle, the return time will last longer than the time you have specified because the PCR-LE Series will wait for a zero crossing during the T1 execution time.

4

Select LOOP (F3) to set the number of repetitions.

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Item

Title

Description

Valid modes

LOOP

Loop

Sets the number of repetitions (1 to 9999; 9999 indicates unlimited repetitions)

AC

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Executing and stopping power line abnormality simulations

You cannot execute power line abnormality simulations in the following situations.

In DC mode or AC+DC mode.

When you have configured the PCR-LE Series so that it does not turn output off when the current limit is exceeded (DISABLE).

When the regulation adjustment or soft sensing compensation function is in use.

When the L range is selected and T3 VOLT is set to a value outside of its range.

When T3 VOLT is set to a value outside the voltage limits.

1

Press OUTPUT to turn output on.

2

Press SIM and then RUN (F1) to execute a power line abnormality simulation.

During execution, press STOP (F1) to stop the simulation.

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Status signals

Status signals are only generated during the periods defined by T2, T3, and T4 (period T3 when T2 and T4 both equal zero).

During single-phase, three-wire output or three-phase output (optional), status signals are output to the U-phase unit.

Signals are generated from the SEQ STAT OUT terminal (a BNC connector) on the rear panel of the PCR-LE Series. Use the configuration settings to set the signal polarity. “H” is approximately 5 V. “L” is approximately 0 V.

The BNC connector is isolated from the PCR-LE Series’ INPUT and OUTPUT terminal blocks. However, the common line of the TRIG and STAT signals is shared internally, so it is not isolated from the BNC connector. Also, the BNC connector is not isolated from the SLOT internal circuits. There is a slight time difference (approximately 100 ms) between the status signal output and changes to the actual output.

Status signals may be output when you change the settings of the various parameters.

Press CONFIG (SHIFT+OPR MODE) and then SIG.I/O (F3) to set the status output polarity. The status signal polarity setting is shared with the sequence function.

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Item

Description

STAT.OUT

NEGA

Sets the status output to low level

POSI

Sets the status output to high level

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