Monitoring relays are a type of relay that trips a circuit breaker when a fault is detected. A relay is an electrically controlled switch that is used to turn the power on or off in a circuit.
Monitoring relays are more sophisticated than regular relays, as they have adjustable operating conditions, whereas normal relays switch according to a fixed threshold. They measure a given parameter, such as voltage or temperature, and will trip a circuit breaker when the parameter gets too high or low.
What are monitoring relays used for?
Monitoring relays have a wide range of uses, depending largely on the factor being monitored. For example, they can protect against overcurrent if measuring current, or they can detect an abnormally low frequency if frequency is being measured.
Types of monitoring relay
The main way in which monitoring relays differ is the function that they measure. This can be a number of things, including:
voltage
current
temperature
frequency
The factor that you need to measure will decide which monitoring relay you choose.
Description:
TELE ENYA series AC and DC voltage monitoring
relay. Multifunction monitoring in a slim easy to use package. The ENYA series have a self-extinguishing plastic body with an IP rating of IP40. DIN Rail mountLED indicatorScrew terminals1 change over contactMultifunction. ...
Description:
TELE GAMMA series single and three phase power
factor monitoring relay. Multifunction monitoring in a slim easy to use package. The GAMMA series have a self-extinguishing plastic body with an IP rating of IP40. Monitoring of inductive and capacitive consumers ...
Description:
Schneider Electric RM35 JA current control relay for
controlling alternating and direct currents in the event of under or overcurrent. Automatic alternating or direct current recognition and a wide measurement range. Monitors heating and lighting circuits and motor and generator ...
Description:
The EMR6 measuring and monitoring relays are designed
for a wide range of switchgear applications. Thanks to their ability to monitor overloads, power fluctuations, phase sequences, machine temperatures and fill levels, the EMR6 relays protect machines and plants and help ...
