Carlo Gavazzi offers a comprehensive range of monitoring relays for monitoring of phase loss, incorrect phase sequence, phase unbalance, over/under current, over/under load, over/under frequency, and over/under voltage.

Our range of monitoring relays include current monitors, voltage monitors, power monitors, phase loss relays, phase sequence relays, thermistor relays, and current transformers.

These monitors are used in a wide range of applications for protecting motors against the damaging effects of single phasing and overloads (elevators, compressors, pumps, air conditioning systems, mixing tanks). They are also used extensively for monitoring instrumentation signals (4-20mA, 0-10V), verification of machinery operation, detection of broken heater elements, monitoring of lights in critical areas (runway lights at airports), monitoring of ventilation fans, and in building automation systems

Our range of monitoring relays also includes standard current transformers (CTs), split-core current transformers, and CTs with analog output.

 

Carlo Gavazzi - On-Delay Timers

Current monitoring relays can monitor both AC and DC currents. Current reading is made directly on the terminals, through an external shunt or current transformer. DIA53 and DIB01 through a built in current transformer can read up to 100Aac. Furthermore the DIA53 doesn’t require any power supply. When it is necessary to read up to several hundred Amps, Current transformers are available to be used in conjunction with the relays.

Carlo Gavazzi - On-Delay Timers

When in need of a frequency monitoring the choice is no longer restricted to the DFB, DFC, or PFB, which monitor the single phase systems monitoring. With the introduction of the DPD it is now possible to use this device which offers the possibility of monitoring the frequency of three phase systems with unparalleled precision and resolution, also thanks to the digital configuration facility...

Carlo Gavazzi - On-Delay Timers

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Carlo Gavazzi - On-Delay Timers

The main purpose of the whole family is the phase loss and the phase sequence monitoring as standard. Higher tier ones can also provide neutral loss, overvoltage, undervoltage and asymmetry on both delta and star mains. The top notch device, the DPD, is capable of monitoring, besides all the above listed items, both three phase voltage and frequency mains at the same time and it can be configured by NFC through the specific app...

Carlo Gavazzi - On-Delay Timers

With the power monitoring relays it is possible to detect power consumption variations of loads. Load variations can be related to load excess or load absence. Some models can monitor active power value which is generally caused by motor load variations. The DWB03 is even capable of reacting to the variation of the power direction...

Carlo Gavazzi - On-Delay Timers

Voltage monitoring relays can monitor from millivolts to several hundred volts both DC and AC single phase. Depending upon model it is possible to monitor under-voltage and / or over-voltage. Low DC voltage version can be usefully employed to monitor batteries in backup systems nowadays so popular. Single phase AC are particularly indicated to verify that a specific device has been plugged to the correct mains when the machine is used tin countries with different values or with significant fluctuations...

Carlo Gavazzi - On-Delay Timers

With the DTA71 and DTA72, recently launched, the temperature monitoring relays are now also available with Mini-D housing hence also suitable for distribution boxes and panels typical In domestic and industrial building installations...

Documents and Downloads

Document File Type File Size Download
Monitoring Relay Brochure PDF 10.8 MB
Monitoring Relay Overview PDF 1.5 MB