ALC-25 Series 25HZ Signal Source
Date:
24 Jun,2026
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The ALC-25 series 25HZ signal source is a dedicated testing and power supply equipment tailor-made for China’s railway 25Hz phase-sensitive track circuit system. Strictly complying with the TB/T1528 railway industry standard, it is widely applied in the commissioning, daily maintenance and fault detection of signal equipment for ordinary railways, high-speed railways and urban rail transit, serving as a core professional device for railway signal maintenance, engineering construction and equipment quality inspection. Addressing the stringent requirements of railway track circuits for signal frequency, phase and voltage stability, this series of equipment overcomes the technical shortcomings of traditional variable-frequency power supplies, delivers high-precision, high anti-interference and intelligent signal output, and fully guarantees the safe and stable operation of railway signal systems.
In terms of core technology, the ALC-25 series 25HZ signal source adopts advanced DDS digital frequency synthesis technology and microprocessor intelligent control architecture, eliminating the low-efficiency drawbacks of traditional ferromagnetic frequency conversion. It can output pure and stable 25Hz standard sinusoidal signals with industry-leading accuracy in frequency, phase synchronization and voltage amplitude. Supporting 220V standard voltage input and adapting to on-site railway power supply environments, the equipment can accurately simulate the working state of track circuits and perfectly meet the power supply and testing requirements of core devices such as two-element two-position relays, track transformers and choke transformers. It effectively solves common industrial problems including traction current interference and signal waveform distortion in electrified railways.
Equipped with multiple intelligent functions and safety protection designs, the ALC-25 series features outstanding practicality and reliability. It is integrated with an independent self-diagnosis system that monitors the operating status in real time, quickly identifies faults such as overload, short circuit and abnormal voltage, and triggers active early warnings to significantly reduce equipment operation and maintenance risks. It supports intelligent switching between main and standby signals with zero interruption and fluctuation during switching, which simulates the real working scenario of railway signal power screens and meets the reliability test requirements of the system. Meanwhile, the built-in multi-stage isolation and anti-interference module enables the equipment to adapt to complex on-site electromagnetic environments, effectively shield external clutter interference and ensure accurate test data. With an excellent mean time between failures (MTBF), it is suitable for long-term continuous operation.
Balancing powerful functionality, portability and practicality, the ALC-25 series 25HZ signal source is applicable to diverse operation scenarios. Featuring a compact structure and simple operation, it requires no complicated debugging for quick startup and application. It is not only suitable for precision calibration and factory testing in laboratories, but also competent for on-site construction, daily station inspection and fault troubleshooting in railway outdoor operations. Compared with traditional testing equipment, this product boasts higher integration and more complete functions, enabling one-stop completion of multiple tasks including 25Hz track circuit signal power supply, parameter testing and performance verification, which greatly improves the efficiency of railway signal maintenance.
As a core supporting device for rail transit signal systems, the ALC-25 series 25HZ signal source has become the preferred equipment for railway engineering construction, daily operation and maintenance, and equipment upgrading by virtue of its standard compliance, high precision and superior stability. It effectively avoids traffic safety hazards caused by abnormal track circuit signals and consolidates a solid technical foundation for the safe, efficient and normalized operation of railway and rail transit systems.
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Add：Building 17, Zhixin Zhizao Valley Industrial Park, Yuexi Town, Ninghai City, Zhejiang Province, China
