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:
Low noise a.c. compact modular contactors and accessories
are ideal for heating lighting and building service type applications. The units are designed for mounting in control panels or cabinets on symmetrical DIN rail or they may be housed in modular ...
Description:
iTL impulse relays are used to control by
pushbuttons lighting circuits consisting of incandescent lamps, low-voltage halogen lamps, fluorescent lamps and discharge lamps. Closing of the impulse relay pole is triggered by an impulse on the coilHaving two stable mechanical ...
Description:
Monitors the frequency variation of 50 or 60
Hz alternating signals.Monitors its own supply voltage connected between phase and neutral.Under and over-frequency with two independent relay outputs.Measurement in true RMS.Selectable memory function.LED status display.
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. ...
