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home > Products > Power Supply and Power Control Products > AC Power Source > EC750SA/EC1000SA > Features
Product Information

AC Power Source
Programmable AC/DC Power Source

Hybrid Power Control
The hybrid power contol integrates the negative feedback control (analog control technology), which is NF’s core technology, and intelligent digital control technology.
Analog technology is provided when wide-band, high response is required, and digital technology is provided for flexible control according to load condition.
The hybrid power control achieves highly stable and robust output by taking full advantage of both analog and digital characteristics.

Basic Performance and Functions

A Variety of Outputs

With AC, full-power output is also available for DC. In the AC+DC mode, an AC wave (sine wave, square wave, or arbitrary waveform) can be super- imposed on the DC output.

AC output voltage range Maximum output current*1
100 V range : 0 V to 155 V, resolution of 0.1 V 10 A
200 V range : 0 V to 310 V, resolution of 0.1 V 5 A
*1The limit on max. output power reduces max. output current.

Output frequency range (internal, internal/external) Resolution
1 Hz to 550 Hz 0.1 Hz
DC output voltage range*2 Maximum output current*1
100 V range : -220 V to +220 V, resolution of 0.1 V 10 A
200 V range : -440 V to +440 V, resolution of 0.1 V 5 A
*1The limit on max. output power reduces max. output current.
*2The ranges in the AC superimposition are AC output voltage ranges (See the above table.)
Operation mode
Eight output modes, combining two operation modes and four signal source modes can be set. The most appropriate mode for an application can be selected.
Operation modes Alternating current (AC), direct current (AC + DC)
Signal source modes Internal (INT), external (EXT), internal/external (ADD), external synchronization (SYNC)

Maximum output peak current
A peak current up to four times as large as the maximum current (RMS values) can be output at the rated output voltage. The EC series also supports capacitor input load (up to crest factor 4).

Limiter function
Output current limits can be set with positive/negative values, and RMS values. In the evaluation of a prototype, this function is useful for protection when an abnormal current is caused by abnormal operation of the load.

Protection function
The EC series has a built-in function for protecting the power source itself if a problem occurs due to issues such as output overvoltage or overcurrent, power unit trouble, internal control problems. If a problem occurs, it is displayed on the panel and output is turned off.
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Mesurement function
The EC series is equipped with high accuracy measurement functions for measuring synchronization frequencies, load power factors, and even the harmonic currents, in addition to the voltage, current and output power. Setting values and measurement values are simultaneously displayed on large-screen display.

Measures * Output voltage (effective, DC average, and peak values)
* Output current (effective value, DC average value, peak value, and peak value hold)
* Output power (active, apparent, and reactive power)
* Frequency (at external synchronization)
* Load power factor
* Load crest factor (CF)
* Output harmonic current* (fundamental wave : 50/60 Hz, up to the 40th order)
*This measurement does not comply with the IEC standards.

Measurement Results and Setting Values Measurement of Output Harmonic Current
Measurement Results and Setting Values Output Harmonic Current
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Interface and External Control I/O
Interfaces and an external control I/O provide support for system integration and automation.
  • RS-232
  • USB
  • External control I/O
    Control input: output on/off, sequence control, memory recall
    Status output:
    power on/off, output on/off, protection operation, limiter operation, output range, sequence, etc.

Other Functions
* External Signal Input
EXT: Amplifies external signal, used as a power amplifier
SYNC: Synchronization of signal source frequency with external signals
ADD: Addition of external signals to internal signals
* The phase can be set from 0? to 359.9? at output on.
* Setting Range Limit Function
Limits the setting range for the output voltage and frequency
* Setting Memory
30 setting statuses

Rear View

Rear View

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User Interfaces Designed for Ease-of-use

Small and Light
Large-screen Display
* *
The EC series features a compact design for convenient desktop use. It weighs approx. 9.7 kg and can be easily carrie Setting and measured values are displayed on a large, easy-to- read screen (5.7-inch with a backlight).

Universal Outlet
Worldwide Power Supply Input
* *
A universal AC outlet (service outlet) is equipped on the front panel . Various types of power plugs around the world can be connected. Power input ranging from AC90 V to 250 V provides worldwide compatibility.
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Abundant Functions for Improving the Efficiency of Power Supply Testing

Sequence Function
Programming of various test patterns such as test repetition, combinations of complex test condition, and long-term testing enable automated test sequences. Power source tests for each export destination can be performed efficiently. Setting Screen for the Sequence Function
  Setting Screen for the Sequence Function
(set for each step)

Overview of sequence function
* Number of steps : up to 255 (within one sequence), 0.1 ms/step (minimum)
* Parameters : DC voltage, AC voltage, frequency, waveform, 2-bit step synchronization output

Example : Voltage fluctuation test pattern
Example : Voltage fluctuation test pattern waveform
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Various Output Waveform
Supports various power tests using sequence and arbitrary waveform.
Instantaneous Power Failure Instantaneous Power Failure
Instantaneous Power Failure, 1-cycle
Instantaneous Power Failure, Phase of 0° to 90°
Instantaneous Power Failure harmonic current wave
Instantaneous Power Failure
Including phase continuity and discontinuity
Harmonic Current Wave
Superimposing 3rd-order, 5th-order and 7th-order
harmonic current on the fundamental wave
(Arbitrary Waveform)
Half-wave rectification  
Half-wave rectification
(Sequence or Arbitrary Waveform)

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