Voltage Metering Amplifier

More Flexibility for Metering in medium-voltage power grids

The Zelisko VMA is an active high-precision voltage amplifier with 3 channels. In combination with Zelisko low-power voltage sensors it converts the output voltages from 3.25/?3 V to 100/?3 V or 110/?3 V. Therefore, the use of Zelisko sensor technology is no longer limited to metering equipment with built-in low-voltage inputs.

  • Voltage Metering Amplifier
  • Tariff Metering
  • Characteristics
  • Inputs and Outputs
  • MORE FLEXIBILITY IN SUBSTATIONS.

    An easy integration of LPVT technology with existing equipment directly supports the modernization of power-grids. 
    Extended compatibility is achieved through amplification of the Zelisko sensors’ secondary output voltage. This allows the usage of energy meters or other measurement appliances designed for signal levels of conventional instrument transformers.

    Advantages

    • Precise metering of voltage signals up to class 0.2
    • Immediate operation without additional on-site calibration
    • Independent amplification of up to three sensor signals
    • Simple installation on DIN top hat rails
    • No requirement for equipment with low-voltage input

    UNLOCKING THE FULL POTENTIAL OF ZELISKO LPVT HIGH-PRECISION MEASUREMENT.

    Through combination of Zelisko low-voltage sensors with the VMA voltage amplifier the sensor technology can
    be applied for tariff metering.

    Advantages

    • Precise current metering according to IEC 61869-2 accuracy classes 0.2 or 0.2S
    • Precise voltage metering according to IEC 61869-11 accuracy class 0.2
    • Immediate operation without additional on-site calibration
    • Attestation of accuracy through calibrated measurement and calibration certificate according to ISO/IEC 17025
    • Easy connection to established electric meter types
    Auxiliary supply voltage:
    DC  24V ± 10%
    Power consumption 1.2 W (max. 15 W)

     

    Temperature range:
    Operation from -10° C to +55° C
    Storage from -25° C to +70° C

     

    Housing: Polyamide housing for mounting on DIN top hat rails
    Dimensions 67.5 x 99 x 114.5 mm (W / H / D)
    Protection class IP20
    Inputs:
    Up to 3 inputs for Zelisko voltage sensors (according to IEC 61869-11)
    Max. input voltage of 190% * Ur
    Distinct assignment of every sensor to a specific channel

     

    Outputs:
    Up to 3 outputs for AC voltage pre-configured to 100/?3 V of 110/?3 V
    Rated output of up to 1 VA per channel

     

    Notifications:
    1 LED signals system failure

    Distributeur

    Zelisko

    Energy - Transformateurs

    Bontronic

    Produits

    Fabricant d'équipements électriques et électroniques