Theta 20A/20V current and voltage transducer is used to measure and convert AC Voltage or Current input into a load independent DC current or voltage output signal.
Special Features
True RMS measurement.
Available in Single or Dual output type.
Onsite selectable output type (DC current / DC voltage).
Accuracy class 0.2 (IEC/ EN 60 688).
Seven Segment LCD Display.
RS-485 (Modbus) Communication.
Output Response Time < 400msec.
Product Features
Measuring Input: AC Current/ Voltage input signal, sine wave or distorted wave form.
Analog Output (Single or dual): Isolated analog output, which can be set onsite to either voltage or current output.
Accuracy: Output signal accuracy class 0.2 as per International Standard IEC/EN 60 688.
Programmable Input / Output: The Transducer can be programmed onsite using front key & display or through programming port (COM) or through RS-485.
LED Indication: LED indication for power on and output type. (Current output : Red LED, Voltage output : Green LED)
Display Module: Optional 7 segment LCD display with backlit & keypad. For displaying measured parameters & onsite configuration of Input / Output.
Programmable: Optional RS485 communication is available. For reading measured parameters & onsite configuration of Input / Output
Application
Theta 20A/20V is used to measure and convert AC Voltage or Current input into a load independent DC current
or voltage output. Output signal generated is proportional to the root mean square value of the input Current or Voltage.
Measuring input X. Voltage Transducer (Theta 20V) |
Nominal input Voltage UN (AC RMS) (PT Secondary range) |
57V ≤ UN ≤ 500 V |
PT Primary range |
57V to 400 kV |
Nominal Frequency FN |
45.....66 Hz |
Nominal input Voltage burden |
< 0.6 VA at UN |
Overload Capacity |
1.2 * UN continuously
2* UN for 1 second, repeated 10 times at 10 second intervals. (Maximum 300V with power supply powered from measuring input). |
No need of external potentiometer. User can set full scale output for desired input with the help of programmable PT secondary. |
Current Transducer |
Nominal input Current IN (AC RMS) (CT Secondary range) |
1 A ≤ IN ≤ 5 A |
CT Primary range |
1 A to 9999 A |
Nominal input Current burden |
< 0.2VA at IN |
Overload Capacity |
1.2 * IN continuously,
10* IN for 3 second, repeated 5 times at 5 minutes intervals,
50* IN for 1 second, repeated 1 time at 1 hour nterval (max 250 A). |
No need of external potentiometer. User can set full scale output for desired input with the help of programmable CT secondary. |
Measuring output Y (Single or Optional Dual) |
Output type |
Load independent DC Voltage or DC Current (Onsite selectable through DIP switches & programming.) |
Load independent DC output (Y) |
0…20mA / 4…20mA OR 0…10V. |
Output burden with DC current output Signal |
0 ≤ R ≤ 15V/Y2 |
Output burden with DC voltage output Signal Y |
Y2 / (2 mA) ≤ R ≤ ∞ |
Current limit under overload R=0 |
≤ 1.25 * Y2 with current output | ≤ 100 mA with voltage output |
Voltage limit under R=∞ |
≤ 1.25 * Y2 with voltage output. ≤ 30 V with current output |
Residual Ripple in Output signal |
≤ 1% pk-pk |
Response Time |
400 msec |
Safety |
Protection Class |
II (Protection Isolated, EN 61 010) |
Protection |
IP 40, housing according to EN 60529
IP 20, terminal according to EN 60529 |
Pollution degree |
2 |
Installation Category |
III |
Insulation Voltage |
50Hz, 1min. ( EN 61 010-1)
7700VDC, Input versus outer surface
5200VDC, Input versus all other circuits
5200VDC, Auxiliary supply versus outer surface and output
690VDC, Output versus output versus each other versus outer surface. |
|
Environmental
Nominal range of use: 0°C to 45°C.
Storage temperature: -40°C to 70°C.
Relative humidity of annual mean: ≤ 75%.
Altitude: up to 2000 m max
Installation Data
Mechanical Housing: Lexan 940 (polycarbonate) Flammability Class V-o acc to UL 94, self extinguishing, non dripping, free of halogen with indirect wire pressure.
Mounting position: Rail mounting / Wall mounting.
Weight: Approx, 0.4 kg.
Ambient Tests
IEC 60068-2-6: Vibration.
Acceleration: ± 2 g.
Frequency range: 10...150...10Hz, rate of frequency sweep: 1 octave/minute.
Number of cycles: 10, in each of the three axes.
IEC 60068-2-27: Shock.
Acceleration: 3 x 50g. 3 shocks in each in 6 directions.
EN 60 068-2-1/-2/-3: Cold, Dry heat, Damp heat.
IEC 61000-4-2/-3/-4/-5/-6 EN 55011: Electromagnetic compatibility.
