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What is electrical transducer?
The Electrical Transducers are devices, which convert input electrical
parameters to a proportionate load independent signal. This output
signal can be either DC Voltage or DC current. These outputs can
operate several receiving instruments, such as indicators, recorders
and alarm Units etc. |
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What are the applications
of the Electrical transducers?
Following are the applications of electrical Transducers.
a) SCADA (Supervisory control & data acquisition) purpose
b) Building automation (BMS)
c) Process control where accurate & reliable monitoring of
electrical parameters is desired like steel, cement & Foundry
Factories.
d) Telemeter (e.g. Remote transmission of electrical parameters
to regional distribution center
e) Energy Management.
f) Input to Recorders/Indicators/PLC’s/Computers/Metering/Alarm
units.
g) Generation, Transmission & distribution of electrical energy. |
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Which are the different
types of the Electrical transducers?
Current, Voltage, Power, Power factor, Frequency, energy &
multi-parameter transducers are the different types of electrical
transducers. |
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What it means by live
zero versions? What is the application of this output?
The version with live zero output has a 4 mA constant current
source to provide the zero setting. So you can set the zero when
there is 4 mA indications so whenever the input is zero, the output
is 4 mA.
Generally the indications are far away from the systems. When
0-10V or 0-5mA output is used that time when the indication is
zero, it is either (1) input is zero or (2) The o/p connection
is open. However incase of 4-20mA or 1-10V o/p type. When input
is zero, there will be indication of 4 mA or when input is zero,
there will be indication of 4 mA or 1 V & it will be zero
when there is any problem in the connection. |
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What it means by Load
resistance?
The application of the transducer is you can take the output to
the long distance to your control room. However there is a limit
of the resistance of the wire & that is called Load resistance.
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What is your Universal power supply?
12V DC ,15 V DC, 24 V DC,220VAC/DC
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What it means by residual
ripple?
The o/p of the transducer is always DC voltage or current. However
there is some unwanted AC signals presents in the DC output. This
is known residual ripple. This is defined as percentage at peak
to peak.
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Accuracy class is with reference to FSD (Full-Scale
Deflection) of measuring range?
Yes. |
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“Output short &
Open circuit proof” what this means?
Similar to transformer transducer step down the electrical parameters.
However we cannot keep output either short or open incase of transformer.
If the o/p remains open, very high voltage generate in the secondary
side, which may cause an accident. But incase of the transducer
circuitry, Transducer made such that there will be no problem
either output remains open or short-circuited. |
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What type of protection you have given
to your transducers?
(A) O/P open or short circuit protection.
(B) HV Up to 2.5KV. |
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How we can use the limit
output?
The limit output is in the contact (on/off) form. With this feature
you can either connect alarm, led or another indicator or controller.
You can specify either lower or upper limit & specify the
on or off function with delay in time. So once the specify limit
crosses more than the delay time, the contact gets activated &
the desired operation gets activated. |
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Which are the different parameters are
important while ordering the transducer?
Following are the important parameters:
- Nominal input
- output
- Auxillary Supply-Self Powered/AC or DC/AC DC.
- Input nominal frequency
- Response time.
- Accuracy class
- Average or True RMS.
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Analog Electrical (CE-T)
1
Element DC 0-30~800A
1
Element DC 100~2500A
1
Element DC 100~10000A
1
Element DC 0-300~500A
1
Element DC 0-5~1200A
DC
+12V
1
Element AC 0.5A~300A
3
Elements AC 0.5A~25A
3
Elements AC 0.5A~25A RMS
1
Element DC 20mA~5A
1
Element DC 30A~200A
1
Element DC 1A~25A
