The automatic high-voltage alternating current bridges 7100-2 and 7100-3
The bridges are intended for the measurement of electric capacity, dielectric losses tangent, electric voltage and frequency
of alternating current - the model CA 7100-2, and additionally for the measurement of the direct current resistance - the model CA 7100-3.
Every bridge consists of measurement unit, interface unit, charging device and a special computer (the control unit)
During the process of measurement the bridge constantlyreflects the information about the value of testing voltage and it’s
frequency.
The bridges are intended for the measurement of electric capacity, dielectric losses tangent, electric voltage and frequency
of alternating current - the model CA 7100-2, and additionally for the measurement of the direct current resistance - the model CA 7100-3.
Every bridge consists of measurement unit, interface unit, charging device and a special computer (the control unit)
During the process of measurement the bridge constantlyreflects the information about the value of testing voltage and it’s
frequency.
Measurement parameters: Capacity, loss tangent, voltage and frequency of alternating current, (direct current resistance*).
Automation of the measurement process Complete, including the choice of sub-range.
The control of the bridge and measurement results displaying: The control with the help of keyboard(16 keys) and reflection on the two stitch display( two stitches, 16 signs each) on the control unit, which is connected with the measurement unit with fibre optic cable;
The capacity and the working voltage of the installed standard capacitor 100 pF, 10 kV.
The capacity of the outside standard capacitor, pF from 10 to 10000
The current through the standard capacitor, mA from 0,01 to 10
The current through the object of measurement, А from 0 to 0,5
The frequency range of working voltage, Hz from 48,7 to 61,2
The measurement range of capacity from 0 to 1000×7о (4 sub-ranges), where Cо – the capacity of the standard capacitor; during work with installed standard capacitor -from 0 to 100000 pF
The measurement range of loss tangent from 0 to 1
The measurement range of resistance * from 5×10^5 to 10^10 Ohm with voltage of 500 V; from 10^6 to 5×10^10 Ohm with voltage of 1000 V; from 1,5×10^6 to 10^11 Ohm with voltage of 2500 V. During the measurement of resistance, the object of measurement is connected between the output of installed to the bridge voltage of the direct current source and the input of the bridge. The same input and the same measurement cable of the bridge are used as in the measurement of capacity and the loss tangent.
The limit of the permissible relative error while the capacity measuring, % ±1×10 -2
The limit of the permissible absolute error while the loss tangent measuring ±(1×10 -4+0,01×tg)
The limit of the permissible relative error while voltage measuring, % ±1,5
Automation of the measurement process Complete, including the choice of sub-range.
The control of the bridge and measurement results displaying: The control with the help of keyboard(16 keys) and reflection on the two stitch display( two stitches, 16 signs each) on the control unit, which is connected with the measurement unit with fibre optic cable;
The capacity and the working voltage of the installed standard capacitor 100 pF, 10 kV.
The capacity of the outside standard capacitor, pF from 10 to 10000
The current through the standard capacitor, mA from 0,01 to 10
The current through the object of measurement, А from 0 to 0,5
The frequency range of working voltage, Hz from 48,7 to 61,2
The measurement range of capacity from 0 to 1000×7о (4 sub-ranges), where Cо – the capacity of the standard capacitor; during work with installed standard capacitor -from 0 to 100000 pF
The measurement range of loss tangent from 0 to 1
The measurement range of resistance * from 5×10^5 to 10^10 Ohm with voltage of 500 V; from 10^6 to 5×10^10 Ohm with voltage of 1000 V; from 1,5×10^6 to 10^11 Ohm with voltage of 2500 V. During the measurement of resistance, the object of measurement is connected between the output of installed to the bridge voltage of the direct current source and the input of the bridge. The same input and the same measurement cable of the bridge are used as in the measurement of capacity and the loss tangent.
The limit of the permissible relative error while the capacity measuring, % ±1×10 -2
The limit of the permissible absolute error while the loss tangent measuring ±(1×10 -4+0,01×tg)
The limit of the permissible relative error while voltage measuring, % ±1,5
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