Frequency meters are intended for measurement of frequency of alternating current in power networks of 50 Hz, 60 Hzi 400 Hz. Chastotomerymogut to be made with the RS485 interface (further - the interface) and are delivered with the program of management.
Frequency meters can be used at power plants and substations, control panels (measurement) of different function as independently, and as a part of telemechanical complexes as devices of removal of measuring information for problem solving of technical control.
The frequency meter displays value of the measured frequency in hertz. Counting of indications digital four - digit.
Ranges of the measured frequencies:
- from 35, 00 Hz to 99, 99 Hz, rated frequency is 50 Hz;
- from 100, 0 Hz to 800, 0 Hz, rated frequency is 500 Hz.
The choice of range of measurement - automatic.
Accuracy rating of a frequency meter - 0, 04 in accordance with GOST 8. 401.
The working provision of a frequency meter - any.
Frequency meter power supply from the alternating current main with a frequency of 50 Hz, 60 Hz or 400 Hz, from 100 V to 250 V.
Input voltage of a chain of measurement from 30 V to 250 V.
Input resistance of a chain of measurement not less than 400 kW.
Gabaritnyerazmera, depending on execution, there can be 96 mm x 96 mm x 82 mm and 72 mm x 72 mm x 80 mm.
Frequency meters with the interface have a possibility of installation on the interface by means of the program of management of settings of the lower and upper values of the measured frequency, at output pins of the corresponding relay kotorykhzamykatsya.
Range of installation of settings of the lower value of the measured frequency should be from 35, 00 to 799, 5 Hz, the range of installation of settings of upper value of the measured frequency - from 35, 50 to 800, 0 Hz.
Duration of a continuous work is not limited.