Residual current circuit breaker RH99M with manual reset 56172

Residual Current Device for installation and equipment protection

The RH99M residual current device with manual reset is a reliable device used to protect electrical circuits from the effects of leakage currents and short circuits to ground. Its design, based on proven technology, ensures a quick and effective response in the event of a dangerous situation, minimizing the risk of electric shock and equipment damage. This device finds application in both domestic and industrial installations where high protection efficiency is required.

Functionality and operating parameters

The device is designed to operate in alternating current (AC) circuits and requires an external power source. It has an adjustable setting range for the differential current, allowing the sensitivity to be adapted to the specifics of the protected installation – from 0.015 mA to 60 mA and 0...30mA and 0...30kA. Equipped with one normally open and one normally closed contact, it enables the implementation of various control and signaling schemes. The rated switching current is 8A, and the operating frequency is in the range of 50-400 Hz. The AC supply voltage is 110-130V (for both 50Hz and 60Hz). It is important to remember the maximum time delay upon power-up, which is 4.82 seconds.

Installation and application – benefits for the installer and user

The RH99M residual current device is characterized by compact dimensions (54 mm width, 97 mm height and 74 mm depth), which facilitates its installation in electrical distribution boards. The electrical connection is made using screw connections, ensuring a secure and durable connection of the wires. Manual reset after tripping is a practical solution – it allows for a quick restoration of power after removing the cause of the short circuit or leakage, but at the same time requires human intervention, which prevents the damaged circuit from restarting automatically. This gives the installer full control over the diagnostics and repair process, and the end user is sure that the problem has been solved. The lack of a fault memory function simplifies fault diagnosis – after resetting the device, the history of previous events is erased.