- exit of the operating value of tension out of limits of admissible thresholds;
- violations of alternation and adhesion of phases;
- violations of full-staging and symmetry of mains voltage.
The device controls key parameters of an electric network and at their deviation disconnects loading.
Existence of the three-digit seven-segment indicator on the front panel of the device allows:
- it is constant to display the current value of tension in a network;
- to display a type of the arisen accident;
- to look through (to visualize) installation of the modes and parameters.
By means of the menu the user has an opportunity to establish:
- the mode of indication of values of tension on phases;
- mode of response of the relay to a digital signal of remote switching off;
- relay type;
- way of a task of a deviation of tension;
- inclusion/shutdown of control of a distortion of phases;
- inclusion/shutdown of control of an order of alternation of phases;
- tension verification regime on actuator plugs;
- type of the measured tension;
- operation threshold on the most admissible value of tension;
- operation threshold on minimum admissible value of tension;
- threshold of admissible value of a distortion of phases;
- time of repeated inclusion;
- shutdown delay time on the minimum tension;
- shutdown delay time on the maximum tension;
- operation delay time on a distortion of phases;
- operation delay time on break of phases;
- operation delay time on an accident signal on a digital entrance.
The device has the additional relay of the alarm system with the removed normalnorazomknuty contacts.