TESCO-6440-3-Phase-Voltage-Synthesizer

Three-Phase Voltage Synthesizer (6440)

Portable Three-Phase Voltage Source for Field Meter Testing

The TESCO Metering Three-Phase Voltage Synthesizer (6440) provides a portable, selectable, voltage source designed to provide accurate three-phase voltage for meter testing, commissioning, and site verification when utility voltage is undesirable.

The TESCO 6440 generates isolated, low-distortion voltage outputs from 69V to 480V AC with ±0.5% voltage setting accuracy, enabling technicians to verify meter performance, validate installations, and perform intertie testing without relying on live system voltage.

The industry’s only modular meter testing platform, carry only what you need, when you need it

At-a-Glance Summary

  • Voltage Output: 69V – 480V AC, 100 VA per phase
  • Voltage Setting Accuracy: 100VA ±0.5%
  • Harmonic Distortion: <3% THD
  • Frequency: 50/60 Hz
  • Auxiliary Power Input: 85-305 VAC
SKU: 6440 Categories: , Tags: , ,
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Description

Complete Intertie Meter Testing Solution

When used together, the TESCO 6440 and TESCO 6330 Meter Site Analyzer provide a complete solution for intertie meter testing, commissioning, and site verification.

The 6440 provides an isolated three-phase voltage source that powers both the meter and test switch during testing. The unit can be powered from a standard 120 VAC wall outlet using the supplied power cord or directly from the site using the field power cord, allowing technicians to perform testing in a variety of field environments.

The 6330 Meter Site Analyzer measures meter voltage, current, phase angle, burden, harmonics, and overall metering accuracy. The unit performs complete site testing and can provide selectable test current from 0 to 5 amps directly to the meter.

Together, the 6440 supplies the voltage source while the 6330 measures and verifies system performance, creating a portable field solution for testing revenue meters, intertie installations, and other complex metering applications.

System Overview

6440 Three-Phase Voltage Synthesizer

  • Provides an isolated voltage source that powers the meter and test switch
  • Operates from a standard 120 VAC wall outlet using the supplied power cord
  • Can also be powered directly from the site using the field power cord
  • Generates programmable three-phase voltage from 69V to 480V AC

6330 Meter Site Analyzer

  • Measures voltage, current, phase angle, burden, harmonics, and meter accuracy
  • Performs complete site verification and meter testing
  • Provides programmable test current from 0 to 5 amps

Combined Solution

  • Simulates real-world service conditions
  • Supports intertie testing, commissioning, and troubleshooting
  • Enables complete meter and site verification in the field
 6440-6330-SystemOffering-01

6440-6330-SystemOffering-01

Modular by Design

Unlike all-in-one testing systems that require technicians to transport a single large, heavy, and unwieldy piece of equipment regardless of the application, TESCO Metering’s approach separates voltage generation and site analysis into dedicated equipment.

The 6330 Meter Site Analyzer can be used independently for many site verification and troubleshooting applications, allowing technicians to carry only the equipment required for the task. When an isolated voltage source is needed for commissioning or intertie testing, the 6440 can be added to create a complete field testing solution.

This modular architecture improves portability, simplifies field deployment, and provides greater flexibility by allowing utilities to configure the right solution for each testing scenario.

When Utility Voltage Isn’t Available

During commissioning, maintenance, troubleshooting, and intertie testing, utility voltage is not always available at the test location. Without an available voltage source, meter verification and system validation become difficult or impossible.

The TESCO 6440 solves this challenge by generating stable, isolated three-phase voltage that replicates real-world service conditions in the field. With selectable outputs from 69V to 480V AC, low harmonic distortion, and support for multiple service configurations, technicians can confidently perform testing without relying on live system voltage.

Its rugged field-ready design and portable form factor make it ideal for utility personnel, meter technicians, and commissioning teams who require accurate voltage simulation for revenue meter testing and system verification.

Key Features

  • Portable Three-Phase Voltage Source: Generates stable, programmable three-phase voltage for field testing applications.
  • High Accuracy Output: Provides ±0.5% voltage setting accuracy from no load to 100 VA per phase.
  • Low Distortion Performance: Produces less than 3% total harmonic distortion (THD) for reliable testing conditions.
  • Programmable Voltage Range: Supports output voltages from 69V to 480V AC.
  • Digitally Controlled Architecture: FPGA-driven DAC system with a fully isolated Class-D amplifier design.
  • Field-Ready Construction: Rugged enclosure with integrated cooling, grounding, and surge protection.

Applications & Use Cases

    • Intertie meter testing
    • Revenue meter verification
    • Site acceptance testing
    • Meter maintenance and troubleshooting
    • Field testing in de-energized environments
    • Commissioning of new metering installations
    • Utility and industrial metering validation

Specifications

Unit Details
Voltage Output 69V – 480V AC, 100 VA per phase
Voltage Setting Accuracy 100VA ±0.5%
Harmonic Distortion <3% THD
Frequency 50/60 Hz
Aux Power Input 85 – 305 VAC
Supported Topologies
  • 69/120 WYE
  • 120/208 WYE
  • 120/240 DELTA
  • 277/480 WYE
  • 240/480 DELTA
Protection 10A Fused
Operating Temperature -10°F to 140°F
Case Size 18.2” x 13.9” x 6.7″
Weight 24.8 lbs
Cooling Fan-cooled, ruggedized for field use
Safety Integrated surge protection and grounding

Features

When utility voltage is not available, testing can be performed using a portable voltage source that simulates real system conditions. Devices like the TESCO Metering Three-Phase Voltage Synthesizer (6440) provide a controlled three-phase voltage output, allowing accurate meter testing in de-energized environments.

A three-phase voltage synthesizer is used to generate stable, programmable voltage for testing and validation. It allows utilities to replicate real-world electrical conditions for meter verification, commissioning, and system testing.

Intertie testing without grid power is performed using a controlled voltage source that simulates system conditions. Tools like TESCO Metering’s Three-Phase Voltage Synthesizer (6440) provide consistent voltage output needed to verify bidirectional energy flow and measurement accuracy.

Yes, portable voltage synthesizers are designed to replicate real-world voltage conditions, including multiple system topologies and stable output across varying loads, enabling accurate field testing.

Accurate voltage simulation ensures that meters are tested under conditions that match real-world operation. This is critical for validating performance, ensuring compliance, and verifying system accuracy, especially in commissioning and intertie applications.

Product Documents

Product Videos

6440 - Three-Phase Voltage Synthesizer

6440 - Three-Phase Voltage Synthesizer

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Disclaimer:

TESCO Metering reserves the right to modify product designs, specifications, features, and documentation at any time as part of our continuous improvement process. All information is provided “as is” and may change without prior notice. While TESCO Metering® strives for accuracy, completeness, and technical reliability, customers should verify the latest product details before making purchasing or engineering decisions. For confirmation of current specifications or application suitability, please contact TESCO Metering® directly.