KRIWAN Current Monitoring System

Vigilant protection against network problems

KRIWAN presents new solutions for current and phase monitoring

Increased current consumption, incorrect phase sequences, differing supply voltage – the causes of malfunctions and resulting damage in electrical systems are often down to these factors. KRIWAN is presenting new solutions that facilitate effective current and phase monitoring, and provide all electrically driven components with reliable protection against network problems in compact units such as chillers, condensing units, and refrigeration racks.

In many applications, such as refrigeration/AC/ventilation technology, as well as process technology, the systems used are fully pre-mounted on a frame. The advantages of this are standardized manufacture in a factory, easier transportation of complete units to the point of use, and faster commissioning. These systems are connected to the same supply voltage with all of the compressors, pumps, valves, and heat exchangers that they use. In order to protect against damage caused by problems with the supply network, KRIWAN has developed a simple, compact, and extremely reliable plug-and-play solution for the entire system.

Phases and currents under control

The KRIWAN Voltage Monitor INT69 UY Diagnose is used in applications in which the monitored system may malfunction or be damaged as a result of excessive voltages or incorrect phase sequences. The voltage monitor checks whether the supply voltage is in the permitted voltage range and the correct phase sequence is present. If the maximum or minimum voltage thresholds are breached, or a phase error is detected, the INT69 UY switches off the system.

The KRIWAN Motor Protector INT69 I2 Diagnose is used in applications in which the monitored system may malfunction or be damaged as a result of excessively high currents. The motor protection unit INT69 I2 Diagnose checks whether the current drawn by the motor is within the permitted limits. If an error is detected, it switches the system off.

Through an additional input, any PTC sensors used for temperature monitoring can be evaluated. When the nominal response temperature (NRT) is reached, the system is switched off immediately.

The protection units are also equipped with an integrated nonvolatile and tamper-proof operating data and error memory in order to be able to document real usage conditions, including problems occurring with the supply network.