Programmable AC Constant Current Source 10000A 25000A

The Programmable AC Constant Current Source represents the next generation of high-precision power sources for electrical testing and thermal effect analysis. Moving beyond traditional, bulky voltage regulator methods, this system utilizes a linear AC variable frequency design powered by SPWM (Sinusoidal Pulse Width Modulation) high-frequency switching technology.

This advanced topology ensures the delivery of a pure, stable sine wave output characterized by minimal harmonic distortion, zero electromagnetic interference, and exceptional accuracy. Designed for rigorous industrial and laboratory environments, this current source guarantees long-term stable operation by automatically compensating for grid voltage fluctuations, circuit resistance changes, and variations in the load's internal resistance. Its high efficiency, compact footprint, and reduced maintenance requirements make it the superior choice for modern production and testing facilities.

Key Technical Specifications

• Model Variants: Single-Phase / Three-Phase (10000A, 16000A, 20000A, 25000A)

• Output Type: Programmable AC Constant Current / Constant Voltage

• Cooling Method: Forced Air Cooling / Forced air/water cooling (depending on model)

Core Technology & Design Philosophy

Unlike conventional "voltage regulator" based solutions that are prone to inaccuracies and slow response times, our source employs a true linear amplification stage following high-frequency modulation. This results in:

• Pure Sine Wave Output: Low Total Harmonic Distortion (THD) ensures test results are not compromised by noise or interference.

• High Dynamic Response: Instantaneous reaction to load changes, maintaining set parameters without deviation.

• Immunity to External Factors: The closed-loop control system negates the effects of incoming utility power instability and fluctuating load impedance, guaranteeing that the programmed current is exactly what the device under test receives.

Detailed Product Features

1. Flexible Operating Modes

• Constant Current Mode (CC): Adjustment range from 50A to 10000A (or up to 25000A) , continuously adjustable. Ideal for thermal and overload testing.

• Constant Voltage Mode (CV): Adjustment range from 0V to 10V (or higher based on transformer tap), continuously adjustable.

• Automatic Cross-Over: When operating in CC mode, the system can automatically transition to CV mode to protect the load while maintaining control characteristics.

2. Variable Frequency Drive

• Frequency Range: Adjustable from 45.0 Hz to 120.0 Hz.

• Resolution: Standard 0.1Hz step (Custom 0.001Hz high-resolution available for specialized synchronization testing).

3. High-Precision Measurement & Monitoring

The integrated digital measurement system provides real-time readouts of:

• True RMS Voltage

• True RMS Current

• Active Power (Watts)

• Output Frequency (Hz)

• Power Factor

4. Intelligent Programmable Control

• Sequence Programming: The unit can store and execute up to 30 groups of test steps. Each step allows independent programming of current, voltage, frequency, rise time (ramp), and run time.

• Endurance Testing: Capable of running automated sequences for up to 1,000,000 cycles to facilitate long-term reliability and life-cycle testing.

• Data Storage: Features 9 groups of non-volatile memory for saving and recalling complete instrument setups, reducing setup time for recurring tests.

5. Embedded PC Monitoring System

The system includes an embedded industrial PC with a dedicated HMI (Human-Machine Interface). This allows for:

• Stand-alone operation via touch screen/keyboard.

• Integration into advanced production line systems for automated data logging and quality assurance.

• Real-time waveform display and data analysis.

6. Remote Interface & Connectivity

Standard communication protocols ensure seamless integration into automated test environments:

• RS232C

• RS485

• Optional: IEEE488.2 (GPIB) for legacy system integration.

Product Applications

This programmable AC current source is the essential tool for any application requiring precise current control to generate thermal or magnetic effects:

• Low Voltage Electrical Apparatus Manufacturing: Production line testing for calibration and quality control.

• Electrical Testing & Certification Institutions: Verification of device specifications and standards compliance.

• Research & Development Laboratories: Simulating high-current conditions for product design and validation.

• University & Vocational Training Bases: Educational demonstrations of electrical principles and thermal dynamics.

Specific Device Testing:

• Thermal Relays: Verification of tripping characteristics.

• Molded Case Circuit Breakers (MCCB): Instantaneous and delay characteristic verification.

• Miniature Circuit Breakers (MCB): Lean production line testing and verification.

• Contactors & Magnetic Starters: Pick-up and drop-out voltage/current testing.

• Transformers & Inductors: Saturation and temperature rise tests.

• Specialized Applications: Electrolytic corrosion studies and high-current connectors.

Three-Phase 10,000A Model Specifics

The Three-Phase 10,000A variant of this series is specifically engineered for testing three-phase protective devices and distribution equipment. It provides balanced, programmable current on all three phases simultaneously, allowing for accurate simulation of real-world three-phase fault conditions and load profiles. This model is critical for verifying the performance of three-pole circuit breakers, power contactors, and other polyphase apparatus where phase interaction and balance are crucial to the test results.

Tags: High Current Source, 25000A Power Supply, AC Current Calibrator, Programmable Power Supply, Test and Measurement, Primary Injection Tester, Industrial Power Sources, Laboratory Equipment, Constant Current Generator