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.

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 is the most complete and easy-to-use test system for protection and metering CTs according to IEEE and IEC standards. It combines the highest safety standards with CT test and assessment features.

The CT Analyzer approach

Using the indirect test method, a voltage signal is injected into the secondary winding and the CT parameters are measured. Based on the results, the CT’s performance characteristics are calculated.

Assessment of CT Performance

All parameters of single- and multi-ratio CTs (ratio, phase, excitation, resistance, ALF/FS) are determined within minutes. The CT assessment automatically delivers an immediate "good / bad" evaluation.

High accuracy and light weight

CT Analyzer’s extremely high accuracy (0.02 % typical) also allows field verifications of CTs up to the 0.1 accuracy class. You can easily carry the lightweight device (< 8 kg / 17.4 lbs) to any test site.

VOTANO 100: Accurate and mobile voltage transformer testing and calibration

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.

VOTANO 100

Voltage transformer testing, calibration and assessment

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CPC 100: Multi-functional performance checks through primary injection on instrument transformers

The patented CPC 100 primary injection test system replaces several individual testing devices. This reduces the costs for training and transport, and cuts down testing time.

Therefore, the CPC 100 is the ideal test set for substation asset commissioning and maintenance.

You can operate the CPC 100 via the integrated front panel, or by using the Primary Test ManagerTM (PTM) software on your laptop.

CPC 100

Universal primary injection test set for substation assets

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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.