New high-voltage device family SHV 80 / AHV80 with fully electronic high-voltage source.
Modular high-voltage test devices of the SHV 80 /AHV 80 series
The new high-voltage test device series is characterised by its modular design and adaptability to the particular requirements of the users, plus by a fully electronic voltage source.
Modules permit flexibility
The flexibility in terms of equipping the devices is assured by various internal modules, some of which even permit further individual adjustment. Basically speaking, the device is subdivided into four main sections: high-voltage generation, device control, control unit and ports. The user can combine the functionalities he requires in practical grades. Certain equipment packages are also available as ready-made device variants.
Simple user controls thanks to VIT In terms of its user control concept, the device blends into the existing series of VIT devices (VIT stands for virtual interface technology). With this user control concept, the parameters are entered via a single angular momentum controller. The only other control elements required are two separate push-buttons, which can be actuated quickly and directly during normal operation. A large graphic display is provided for displaying the test readings as well as the test plans and other parameters. Various simple to access menus are available for configuring basic device settings (set-up) and special test parameters as well as entire test sequences.
For applications in automatic systems that do not require the device to be controlled directly by a human operator, it is possible to order the devices entirely without the VIT technology. This does not mean that the actual device functionality is lost. In such scenarios, control ensues exclusively via interfaces. The VIT technology can, however, be retrofitted at any time.
The device series complies with the relevant regulations in terms of the requirements placed on the device itself besides the possible application scenarios. By way of illustration, the device generates a max. output power of 500VA and a short-circuit current of 200mA from upwards of 1000V test voltage. The voltage and current are tested with a measurement uncertainty of < 1% on the high-voltage side. Safety circuits with positive-action contacts and directly connectable warning lights are also standard features as are the prescribed closing states as per EN 50191.
Technology The device is fitted as standard with an electronic voltage generator, which, due to its compact design and low dissipation power, does not require additional fans. This also meant that it was possible to integrate the device into a 4HE sized 19" housing. The device allows the user to select various tripping methods for detecting excess current as well as for monitoring minimum current and maximum voltage levels.
The possible ports a device offers is becoming increasingly important. Accordingly, it is possible to equip the device with a variety of ports. An RS 232 port is fitted as standard. For conventional applications, digital I/Os are possible that permit direct communication with a PLC. A new feature in test devices of this kind is also the optionally available Ethernet port, which is now also fitted in every PC. This provides a highly inexpensive means of integrating the device directly into a network.
Author: V. Grobshäuser