Системы измерения вибрации

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.