The M200 AC voltage relay provides voltage monitoring and protection in three phase three wire systems.
They are used in applications such as mains failure, regulation of power supplies and to protect voltage sensitive equipment.
The relay operates when the externally adjustable trip point is reached. An external differential control is provided with adjustment 1-15%. The differential ensures that the parameter being measured returns to % set above or below (depending on whether it is under or over unit) the trip point before the relay returns to its original state.
On under units the relay de-energises when the input signal goes below the trip point.
A red LED indicates the state of the relay, whilst a green LED indicates the condition of the power supply.
The voltage relays monitor their own power supply so auxiliary power is not necessary. A green LED indicates a supply is present. The relays feature an adjustable power supply, allowing flexible selection of the connected nominal voltage.