Common Electrical Tests on Instrument Transformers
Our test systems let you carry out several standard tests quickly:
- magnetization characteristic
- saturation behavior (ALF/FS)
- transformation ratio and its accuracy
- polarity
- load
- winding resistance
- withstand voltage or remanence
The results give you a good overview of your instrument transformers’ (ITs’) condition to determine further necessary measures.
Former accuracy class 0.1 tests of ITs required a complex on-site test, or sometimes a complete disassembly and transport to a test laboratory. However, you can perfectly use OMICRON’s powerful and compact test solutions for field tests. With their high accuracy, they can also be used partially for the calibration of ITs during metering.
Expert recommends
CT Analyzer
CT Analyzer: Current transformer (CT) analysis with the push of a button
Firmware Packages
CT Analyzer can be ordered with different firmware packages:
Basic
Measures ratio, composite error, excitation and knee point, winding resistance
Standard:
Measures and assesses CTs with accuray classes ≥ 0.3 according to IEC and IEEE standards
Advanced:
Expands standard package to accuracy classes ≥ 0.1 and additional assessment standards
IEEE Protection:
Measures protection CTs according to IEEE C57.13 (does not support metering CTs)
Benefits of this solution
Complete Solution
The CT Analyzer approach
Assessment of CT Performance
High accuracy and light weight
Other solutions
VOTANO 100
VOTANO 100 is the first portable device (15 kg/33 lbs) which offers highly accurate voltage transformer tests. This allows to use VOTANO 100 not only for electrical performance checks, but also for class verification and calibration.
It performs quick tests of all kinds of inductive voltage transformers (VTs) and capacitive voltage transformers (CVTs) for both protection and metering purposes.
Its light-weight design makes it ideal for on-site tests and calibration tasks in power system grids. As a manufacturer or testing lab you can use VOTANO 100 in your production facilities and test/development labs.
The voltage booster VBO2 provides the test voltage during the ratio measurement. Its integrated switchbox automatically switches between the necessary test sequences.
Other solutions
CPX 200
CPX 200 is a highly accurate, multifunctional test system designed for commissioning and maintenance of substation assets. It performs various measurements, including ratio up to 1 kA, winding resistance, burden, excitation, voltage ratio, and LPCT ratio testing, all in one compact unit.
CPXpert streamlines your workflow by utilizing multiple current transformers (CTs). For instance, all three feeder phases can be tested simultaneously with a single overview, for easier comparisons and simplified reports. Secondary-side tests, such as excitation, winding resistance, and ratio, can be performed with a single setup.
Other solutions
COMPANO 100: Easy wiring checks of secondary wiring
COMPANO 100 is the universal and easy-to-use solution for all types of basic testing duties in electrical energy systems.
Controlled electronic sources allow the user to obtain exactly the desired value and to output signals with variable frequencies and other signal forms, automated ramps, and pure DC.
The highly flexible inputs are configurable, for example, as binary inputs for relay testing, AC or DC voltage inputs or current inputs.
