TETRA, LTD 
REZE-9 is designed to protect asynchronous motors and other rotary machines with a rotational speed of 400 to 3000 rpm and a shaft diameter of 20 to 200 mm by turning them off in the event of the following emergency situations:
- unacceptable vibration of the machine;
- inadmissible vibration of rolling bearings due to their increased wear or poor lubrication quality.
REZE-9 has additional functions:
- indication of the vibration state of the machine and the technical condition of the bearings;
- issuing output signals to indicate emergency engine shutdown using a remote LED or additional contacts with a rated operating current of 0.1 A at an amplitude of a rated operating voltage of 400 V.
REZE-9 operates in conjunction with a magnetic starter (contactor), as well as vibration sensors (2 pcs.).
Operating principle:
– основан на обработке сигналов от датчиков вибрации. При превышении одним из сигналов заданной уставки реле разрывает цепь питания катушки пускателя (контактора), отключает его и, соответственно, двигатель.
Technical specifications:
| 1) | rated current of contacts at voltage 220/380 V, A | 8 |
| 2) | controlled parameters: | |
| – when evaluating machine vibration | vibration velocity (root mean square value) | |
| – when evaluating bearing vibration | vibration acceleration (mean square value) | |
| 3) | controlled dynamic ranges: | |
| – when evaluating machine vibration, mm/s | 0.4÷11.2 | |
| – when evaluating vibration of bearings, dB | 40 | |
| 4) | controlled frequency ranges, Hz: | |
| – when evaluating machine vibration | 5÷1000 | |
| – when evaluating bearing vibration | 500÷10000 | |
| 5) | time delay setting, sec | 122 |
| 6) | AC supply voltage, V | 220 (-44 +22) |
| 7) | power consumption, W, not more | 2 |
| 8) | line resistance between relay and vibration sensor, Ohm, not more | 50 |
| 9) | enclosure protection | IP30 |
| 10) | overall dimensions, mm | 90×90×65 |
The warranty period – is 24 months from the date of sale.