WT5000 precision power analyzer transformer version

Product overview

Yokogawa supports the transformer industry with a power analyzer that meets its high accuracy needs. With unprecedented accuracy with power factors as low as 0.001, the WT5000 Precision Power Analyzer - Transformer Version provides the consistently reliable measurements that transformer manufacturers need for research, development, production or acceptance testing.

Supplied with two calibration certificates from Yokogawa's ISO17025-accredited calibration laboratory, the WT5000 Precision Power Analyzer - Transformer Version provides the confidence needed for low power factor measurements to ensure compliance with IEC60076-8.

Key features

• World's highest power analyzer accuracy of 0.008%
• Accuracy of 0.6% with power factor as low as 0.01 at 100 V and 1 A current
• Included calibration certificates with ISO/IEC 17025 accreditation
• Measurement for no-load harmonic current evaluation
• IEC60076-8 compliant calculations

Feature presentation

Precision at your fingertips

The WT5000 Precision Power Analyzer - Transformer Version is the world's most accurate precision power analyzer, guaranteeing a baseline power measurement accuracy of ±0.008%. Operated by touch and hardware, the WT5000 offers an intuitive measurement experience for testing power transformers. You can define and use event triggers and custom calculations to suit your application needs, and view measurements in numeric, waveform, bar, vector and trend formats.

Best accuracy at low power factors

The instrument offers the best accuracy at low power factors for commercial frequencies from 45 to 66 Hz. Low power factors have a huge impact on accuracy. The instrument offers an accuracy of 0.6% of the reading for measurements at power factors as low as 0.01 at 100 V and 1 A current. This makes it ideal for accurate transformer loss testing in accordance with IEC60076-8.

Accredited calibration certificates included

When every kilowatt lost over certain limits can cost thousands of dollars in penalties, it becomes necessary to have the confidence to measure power losses. To address this, the transformer version of the WT5000 has been optimized by ISO17025 accredited calibration for 53 Hz at power factors of 1, 0.5, 0.05, 0.01 and 0.001. Additional calibration with ISO17025 accreditation up to 100 kHz ensures performance when measuring distorted waveforms, for example, when measuring loss current in transformers with no load. This enables the integrated transformer measurement system to measure power losses with high accuracy and determine any drifts in accordance with IEC60076-8.

Accuracy specifications

Looking at the data sheet for the WT5000 transformer version, it is easy to see that it offers unparalleled calibration accuracy with power factors as low as 0.001.

Direct reading of corrected power for potential transformers

When small loads are connected to potential transformers, the WT5000 Precision Power Analyzer - Transformer Version directly supports both standard formulas used to calculate corrected power.

European Standardization Laboratory

As one of the few ISO 17025-certified organizations that offers calibration up to 100 kHz, Yokogawa is uniquely positioned to guarantee the power measurement accuracy specifications of the WT5000 transformer version and improve them through calibration. This is to ensure performance when measuring distorted waveforms, such as when measuring idle losses and transformer current.

In pursuit of the highest possible precision, Yokogawa's European Standardization Laboratory, which is accredited to ISO/IEC17025 (RvA K164), offers tangible confidence in the measurement system and its results. The European Standardization Laboratory enables users to obtain the world's most accurate measurement results. It provides a form of quality assurance and confidence that enables engineers to develop next-generation technologies that are environmentally friendly, energy-efficient and distinguished by superior performance.

Advanced harmonic analysis

Evaluate and compare harmonics at the input and output of inverters, motors and power conditioners up to the order of 500. The WT5000 allows users to not only measure harmonics and power simultaneously, but also enables harmonics from two different input sources to be compared. The effects of noise and aliasing are minimized by anti-aliasing and line filters with Digital Parallel Path technology, enabling simultaneous power analysis of broadband and narrowband components. During a no-load loss test, the current will have a distorted form due to eddy currents and hysteresis in the core. The WT5000 Precision Power Analyzer - Transformer version allows harmonics and distortion to be measured while simultaneously measuring power.

Advanced filtering

In addition to low-pass frequency and line filters, the WT5000 has advanced filtering capabilities that provide unprecedented control for analyzing even the most difficult waveforms with high precision.

• Synchronization Source Filter: Instead of synchronizing to zero-crossing, the user can select any specific synchronization source signal point.
• Improved frequency filter: Allows users to simultaneously measure the fundamental frequency and switching frequency without affecting any other parameter.
• Digital parallel path filters: Aided by a high-frequency anti-aliasing filter, two separate linear filters for normal and harmonic measurements ensure aliasing-free accuracy for broadband and harmonic measurements. Users can reduce the number of harmonic orders to eliminate attenuation in low-bandwidth measurements.