1. Can we add the DC fault protection to an existing industrial cabinet without replacing the remaining Type A power supply?
1.1 Risk of failure of Type A protective device during frequency conversion renewal
After the conversion of the power frequency motor factory into a variable frequency motor, the original residual current type A was stored in the control cabinet. If a ground fault occurs on the side of the correction of the frequency converter, the DC component in the fault current causes saturation of the core of the type A converter, resulting in a complete failure of the protective function. By connecting the HYCA leakage protection residual current sensor to the original circuit, a signal can be immediately output when a 6mA DC leakage is detected, restoring full current sensitive safety protection without replacing the original device.
1.2 Requirements for the modernization of equipment in industrial distribution cabinets
If all the distribution containers put into operation in the factory are replaced by Type B protective equipment, the cost will be very high. HYCA can be installed directly in tight spaces within distribution cabinets with built-in size and integrated design of the original connectors. The device monitors the remaining current in real time and interrupts the circuit if it detects DC components that a Type A device cannot respond to. The operation and maintenance team meets the requirements of electrical safety control at a very low cost. Compared to a hall sensor solution that requires a dual power supply, the design of a single 5V power supply significantly reduces the integration difficulty for HYCA. In this scenario, HYCA acts as a forward current sensor and provides a convenient way to update existing industrial equipment.
2. How can a continuous leak control be implemented in the application of the variable frequency motor and server system?
2.1 Space limitations for internal integration of book-type processors
Book type frequency converters are arranged tightly in a robot cabinet and production center by automation, and conventional type B devices are very wide to accommodate. HYCA takes over the PCB welding project, and the engineers plan it directly on the main control board of the frequency converter. The power lines can pass through a unit with a built-in main connector. The entire scheme of the current sensor takes up only a small space on the plate and provides protection against double AC/DC leakage without significant structural changes.
2.2 Requirements for monitoring the high frequency fault state in server engines
The high frequency of earth leakage due to the modification of PWM servo motors is a natural working phenomenon, but the increase in leakage due to deterioration of insulation must be detected in time. HYCA provides a real-time response to the DC output value via the PWM output games, and engineers can continuously capture the direction of change after connecting to the PLC and arrange scheduled maintenance before approaching the travel threshold. This feature enables the leakage protection residual current sensor to serve as both a protective device and a status monitoring sensor.
3. How can the leak protection function be effectively checked during factory inspection as well as during commissioning and maintenance of industrial equipment on site?
3.1 Application of automatic self-control at the end station of the production line
In the mass production of motor controls and frequency devices, the conventional method of electric injection on the base side is difficult to operate and endangers safety. The self-verification function built into HYCA provides an automated solution for the final inspection of the production line: The tester provides a 5V power source and for a short Once the TEST IN games are grounded, the device calibrates and automatically simulates errors, verifying the DC and AC travel functions within seconds. The PLC can determine qualifications by reading out the initial state without the need for manual interventions or high-voltage work.
3.2 Anti-interference application for densely mounting several units in a multi-axis control cabinet
Many servo motors work in parallel in a multi-axis control cabinet, creating a complex electromagnetic environment. HYCA has detected the suppression of strong magnetic interfaces during the design phase, enabling to mount many adjacent units in the same control cabinet without an interface to each other. In central control scenarios that require independent protection against any motor voltage leakage, this function guarantees the independence of any detection from the circuit.
4. Conclusion
The current sensors of the HYCA series have shown a clear application value in three main scenarios: transformation of industrial energy distribution, control of the variable frequency motor, Device factory control, its built-in size, easy integration and sensitive ability to detect full current. For industrial projects that strive for reliability and integration comfort, the current detection solution is a priority.
Compay: WENZHOU HEYI ELECTRICAL CO.,LTD
Brand: HEYI/ASCT
Contact: Bethy
E-mail: heyi@heyiele.com
Tel: 86-13968747975
