SMD-4 system

Description

Description:

 

Vibration sensors

The main ones are vibration acceleration measurement sensors (accelerometers) with a piezoceramic element isolated from the body and standard ICP power supply.
A typical conversion factor is **0 mV / g with a marginal peak value of the measured acceleration of *0 g. The normalized frequency range of the sensor is 0.******0 Hz,
for relative measurements, the sensor is used up to *5 kHz, the dynamic range is not worse than **0 dB. The operating temperature range is from **0 to ***5 degrees Celsius.
The ICP-sensor power supply is provided by the Bias.

Current transducers

The SMD*4 electric machine can use measuring transformers to measure power current with or without a magnetic core (Rogowski coil). The required frequency
range of the measuring AC transformer is from 2 to *0,**0 Hz, power is not required for most sensors. The required dynamic range of the current sensor is at least **0 dB.
The upper limit of the temperature at the place of mounting the current sensor (with electronics) on the power cable of the machine is **5 degrees Celsius.

RPM sensors

The system can use typical eddy current or magnetic speed sensors (frequency range 0.****0 Hz) with one pulse per revolution, forming a synchronizing voltage pulse
of either polarity with a voltage of **0 V with a leading front of up to *0 μs. Foreddy current sensors produced by Association VAST,1
 power source is included in the BIAS.

The determination of the frequency of rotation of a unit with a static voltage regulator can be carried out on the current spectrum in one of the measuring channels of the
SMD*4 system, considering the correction for the number of pole pairs and slip frequency in units with an asynchronous motor.