VVK-331 Control and Alarm Device
Purpose
Stationary equipment for continuous measurement and control of non-pulse fixed vibrations on non-rotating parts of the machine during its start-up and under load.
VVK-331 is the basic equipment under GOST 25364-82. Beginning from 1982, it has been installed on all new and existing turbines in the USSR and was used at many energy projects abroad.
VVK-331 is a measurement instrument recorded in the State Register of Measuring Instruments of Ukraine under the number y119-07. It has a valid certificate of conformity № UA-MI/2p-2286-2007.
The device comes in ten versions depending on the use of either uniaxial or biaxial sensors and the number of measurement channels.
Elements
|
№ |
Item |
Number |
|---|---|---|
|
1. |
VDT-131 vibration gauge |
from 4 to 20 |
|
2. |
VDT-231 vibration gauge |
from 2 to 10 |
|
3. |
Vibration unit |
from 4 to 20 |
|
4. |
Power unit |
from 1 to 5 |
|
5. |
Switching unit |
from 1 to 5 |
Functions
· Measurement of RMS values of vibration speed;
· Displaying the RMS values on the dial test indicator;
· Alarm signaling (emergency and warning) in case the RMS values exceed the threshold;
· Channel failure alarm signaling;
· Providing analog current output proportional to the vibration speed for connection of recording devices;
· Operating mode - continuous, round-the-clock.
VVK-331 can be used independently or as a part of the aggregate or SCADA systems for process automation in oil and gas transportation, energy, mining and processing industries.
Brief specifications
|
№ |
Parameter |
Value |
Notes |
|---|---|---|---|
|
1. |
Sensor type |
piezoelectric accelerometer |
|
|
2. |
Number of channels |
From 4 to 20 |
|
|
3. |
Measurement range of RMS values of vibration speed, mm/s |
From 1 to 10 From 3 to 30 |
Switchable |
|
4. |
Operating frequency range, Hz |
from 20 to 1000 |
|
|
5. |
Combined error,%, max |
10 |
|
|
6. |
Power |
AC 220V, 50 Hz Power from 120 to 600 VA |
Power depends on the version |
|
7. |
Dimensions (length, width, height), mm |
|
|
|
Sensor (piezoelectric vibration gauge) |
58´89´62 |
|
|
|
Cased amplifier |
275´170´92 |
|
|
|
Switching unit |
524´510´274 |
|
|
|
Cabinet |
580´650´1850 |
|
|
|
8. |
Weight, kg, max |
82 …403 |
Depending on the version |
Operating conditions
|
№ |
Item |
Temperature, °С |
Relative humidity,% |
|---|---|---|---|
|
1. |
Vibration gauge sensor |
from + 10 to + 100 |
98 (at the temperature of +35°С) |
|
2. |
Gauge amplifier |
from + 5 to + 70 |
80 (at the temperature of +25°С) |
|
3. |
Vibration unit |
from + 5 to + 40 |
80 (at the temperature of +25°С) |
|
4. |
Power unit |
||
|
5. |
Switching unit |
Average service life is at least 10 years.