Precision power analyser for transformer testing

28 April 2010 Test & Measurement

The new WT3000T from Yokogawa is a precision power analyser specifically targeted at the needs of the power transformer industry. Based on the company’s highly successful WT3000, the new instrument combines enhanced accuracy and long-term stability with the ability to carry out measurements at low power factors – a challenging area for transformer manufacturers.

In developing the new WT3000T, Yokogawa has worked closely with transformer manufacturers, who require an accurate instrument to provide direct readout of key parameters along with clear overload and safety indication. Of particular concern to transformer manufacturers is the economic impact of transformer losses in the power generation and distribution sector. If a transformer exceeds its specified loss under no-load conditions, the cost penalty for the manufacturer can be high. Hence the accuracy of the measurement system becomes critical: the more precise the measurement, the less likelihood there will be of penalty charges.

At the standard commercial AC frequencies in the range 45-66 Hz, the WT3000T offers an accuracy of better than 0,6% at a power factor of only 0,01 (at 100 V and 1 A). It also provides 6-digit resolution through the use of 32-bit RISC processing and high-quality 16-bit analog/digital converters. The instrument’s accuracy is also valuable for additional measurements on capacitors, line filter coils or other power-factor correction circuitry used in the power grid.

The WT3000T provides direct readout of corrected power under small load conditions according to the formulas in the IEC and ANSI/IEEE standards. The large (8,4 inch) colour LCD screen makes measurements easy to read. Clear on-screen indicators alert the operator when the voltage and/or current inputs of the power meter are overloaded, allowing the power to the device to be disconnected to prevent potential costly damage.

For more information contact Trevor Grundlingh, Protea Electronics, +27 (0)11 719 5700, [email protected], www.protea.co.za

Further reading:

SIGLENT launches new 8 GHz DSO
Vepac Electronics Test & Measurement
SIGLENT has unveiled the enhanced SDS7000A/AP models, building on the success of its SDS7000A high-resolution digital oscilloscope series.

Read more...

---

Multi-functional high-res oscilloscopes
Coral-i Solutions Test & Measurement
RIGOL Technologies has launched two powerful additions to its oscilloscope portfolio that are tailored to meet the growing challenges of power electronics, automotive systems, and high-speed digital designs.

Read more...

---

TDK expands programmable PSU series
Accutronics Test & Measurement
With a 3U high chassis, the GAC and GAC-PRO provide extremely high-power density for a fully featured programmable AC power source.

Read more...

---

Analysing magnetic fields
Accutronics Test & Measurement
The engineers at Narda Safety Test Solutions have achieved a breakthrough in isotropic measurement and analysis of low-frequency magnetic fields in the form of their latest digital H-field probe.

Read more...

---

A new class of sampling scope
Comtest Test & Measurement
The PicoScope 9400A Series combines the huge analogue bandwidth of sampling oscilloscopes with the triggering architecture of real-time oscilloscopes.

Read more...

---

Single channel, programmable PSU
Electrocomp Express Test & Measurement
Rohde & Schwarz’ NGC101 is a NGC100-series power supply with a wide range of functions that make them ideal for use in development labs and industrial environments.

Read more...

---

Next-gen LineScan camera
Eagle Africa Technology Test & Measurement
New Imaging Technologies has launched the new LiSaSWIR, its next-generation SWIR LineScan camera and sensor.

Read more...

---

Ultra-portable spectrum analyser
Vepac Electronics Test & Measurement
The PXN-400Z from Harogic is a handheld spectrum analyser covering a frequency range of 9 kHz to 40 GHz with a 100 MHz analysis bandwidth.

Read more...

---

Why your next oscilloscope should be PC-based
Comtest Test & Measurement
For decades, traditional benchtop oscilloscopes have been a cornerstone of engineering, offering reliability, precision, and familiarity. However, as technology evolves, so do the tools we rely on.

Read more...

---

Versatile 3-in-1 instrument
Vepac Electronics Test & Measurement
The ARB Rider AWG-2000 is the cost-effective and powerful two or four channel arbitrary function generator and two or four channel arbitrary waveform generator with advanced sequencer functionality.

Read more...

---