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The measurement of electrical quantities in an energy system is one of the central tasks for every plant operator. As a rule, the initial primary quantities are made available for data acquisition via transducers.
Transducers get their input signals from CT's and VT's and provide equivalent analog DC signals or a communication protocol at their outputs.
The secondary quantities form the basis for system analysis, system control and the recording of energy consumption for billing purposes. The individual requirements with regard to the accuracy of measured data are based on the respective intended purpose. Periodic functional checks and calibration of the measuring devices, usually based on binding specifications, are essential.
Meter Testing
The testing of meters, in particular those of 0.2s class, requires a testing device to have a high degree of accuracy. Regardless of whether transformer connected or directly connected meters are to be tested, the concept of individual on-site meter testing with current and voltage sources is becoming increasingly popular and preferred over combined testing with fixed multi-station meter testing equipment. With its portable testing equipment, OMICRON supports both on-site testing and the use of laboratory equipment as a single-position test system.
Transducer Testing
In high and medium-high voltage networks, transducers form the metrological basis for recording electrical parameters. All switching operations, such as the demand for additional power plant capacity via the dispatch center, are based on these measurements. Just as important are regular calibrations of the transducers shared across the entire network in the network nodes. Thanks to their high degree of accuracy, OMICRON’s CMC 256plus and CMC 156 EP testing devices allow the reliable calibration of any type of transducer.
Testing of PQ Analyzer
It is the pressure being exerted by network agencies, network end customers and also distributed network operators that is driving forward the expansion of a seamless system for monitoring power quality in high and medium-high voltage networks. Class A PQ analyzers are used for this per the IEC 61000-4-30 standard. The basis for the assessment of power quality is the ability to determine it accurately; therefore PQ measuring devices must be monitored regularly. With the CMC 256plus in conjunction with the software module "PQ Signal Generator", OMICRON is making an important contribution to the reliable testing and calibration of PQ analyzers.
Transient Recording
During troubleshooting, the measurement and recording of signals is one of the main tasks of the systems engineer. OMICRON’s CMC 256plus and CMC 356 testing systems each contain a powerful 10-channel transient recorder.