VariTrans® P 29000
Compact high-voltage isolation amplifiers with safe galvanic isolation, VariPower® broad-range power supply and genuine calibrated range selection.
Working voltages up to 1000 V AC/DC and test voltages up to 5.4 kV AC, high performance and compact modular housing – with the VariTrans®
P 29000 series, Knick is consistently expanding the VariTrans® range. The new high-voltage amplifiers from Knick also present a globally unique combination of properties with substantial advantages in installation, configuration and operation:
• Safe galvanic isolation with high isolation
• Precise calibrated range selection (gain error 0.1 or 0.3 %)
• Simple configuration without additional tools
• Signal quality not influenced by control elements
• Integrated broad-range power supply 20 to 253 V AC/DC.
Genuine Calibrated Range Selection VariTrans® P 29000 sets the measuring ranges via DIP switches on the front side of the modular housing. Selection is then regu lated by a micro-controller, meaning that no calibrators or other instruments are required for on-site configuration. LEDs visualize correct functioning or any errors. The simple implementation of special measuring ranges supports solutions tailored to your application.
Optimized Housing With a width of only 17.5 mm, the modular housings of the
P 29000 series strike an optimum balance between compactness and safety. The minimum clearance between inputs and outputs, in conformance with standards, is reliably met in the P 29000 series; additional isolation measures are not required.
Versatile Applications The high-voltage isolation amplifiers in the VariTrans® P 29000 series are available with three input variants for various requirements: high voltage, mV, or current input. The devices are ideal for monitoring and controlling electrical drive systems operated with DC voltages and feature a passive output for direct connection to a supplying SPC. Input voltages of ±100 V to ±1000 V DC are galvanically isolated and reproduced as a 0/4 ... 20 mA or 0 ... 10 V standard signal, or as a bipolar signal in the –20 ... 20 mA or –10 ... 10 V range at the output.Typical applications are direct current and servo drives, generators etc, alongside with power supplies for welding units and inverters for solar or wind power systems. The extraordinary performance and flexibility of the isolation amplifiers supports the user in the development of the most diverse product or system solutions.
Practical Test Jacks For direct measurement of the output power, the isolation amplifiers feature test jacks which enable measurement of output current and voltage. An optional RangeLimit function allows setting lower and upper output limits. In addition, versions with full-wave rectifiers in the signal path are available. The user can invert the output. A connectable potentiometer enables adjustment of up to 5 % on the measuring section.
Integrated Broad-Range Power Supply Maximum flexibility and direct added value for the user is also provided by the integrated VariPower® broad-range power supply (20 ... 253 V AC/DC), suitable for the power-engineering frequency range of 45 … 440 Hz. This ensures trouble-free operation with alternating or direct voltages everywhere in the world and provides for maximum safety even in unstable power supply networks. Installation is simple and safe – incorrect assignment of the mains voltage is practically excluded; expensive downtimes and repairs during commissioning are avoided. The 24 V DC supply voltage for the VariTrans® P 29000 can be conveniently and inexpensively looped by using mounting rail connectors.
Superior Functionality In the VariTrans® P 29000 series, the circuit design and device construction ensure excellent transmission quality which is reflected in the zero stability, linearity, long-term stability, frequency response and immunity to interference. Thanks to the high cut-off frequency of the devices, the signal form on the input is reproduced on the output without distortion. Fast changes in the input signal are converted almost without delay into a corresponding change in the output signal. In the input signals, the new Knick high-voltage isolators provide a wide measuring range: from the millivolt range all the way to high voltages can be directly measured. Analog unipolar and bipolar (standard) signals are available at the output. The user can select from 192 switchable calibrated ranges and thus take into account the individual operating conditions.
