(TESCO: Bristol, PA) -- As electric utilities continue modernizing the grid with advanced metering infrastructure (AMI), distributed energy resources (DERs), electric vehicle charging infrastructure, and increasingly sophisticated distribution systems, field technicians require testing equipment that is as adaptable as the systems they maintain. Responding to that need, The Eastern Specialty Co. (TESCO) announces the Model 6440 Three-Phase Voltage Synthesizer, its newest expansion of the TESCO Portable Meter Testing Platform.

The Portable Meter Testing Platform design provides utilities with a flexible, modular approach to field testing. Anchored by the proven TESCO 6330 Meter Site Analyzer, and now expanded with the Model 6440 Three-Phase Voltage Synthesizer, the platform delivers laboratory-grade testing capabilities in a portable, field-ready solution. By separating voltage generation from measurement and analysis, utilities can configure the right combination of instruments for each application without the size, weight, or complexity of traditional integrated testing systems.

“Utilities continue to invest in smarter grids, advanced metering technologies, and increasingly complex electrical infrastructure,” says Tom Lawton, TESCO president and CEO. “The expansion of the TESCO Portable Meter Testing Platform with the Model 6440 gives technicians a highly accurate, portable three-phase voltage source that integrates seamlessly with the 6330 Meter Site Analyzer. Together, they provide utilities with a scalable platform for commissioning, validating, and maintaining today’s sophisticated revenue metering systems while giving customers the flexibility to expand their testing capabilities as their needs evolve.”

A smarter approach to portable meter testing

Traditional field testing often requires technicians to transport large, integrated testing systems or depend on available utility voltage to perform commissioning and troubleshooting. The TESCO Portable Meter Testing Platform takes a different approach by allowing technicians to deploy only the equipment needed for the task at hand.

The Model 6440 provides a programmable, isolated three-phase voltage source, while the 6330 Meter Site Analyzer performs comprehensive measurement and analysis, including voltage, current, phase angle, burden, harmonics, and overall meter accuracy. Together, the instruments create a complete portable solution for commissioning, validating, troubleshooting, and maintaining revenue metering installations throughout the utility system.

Whether technicians require voltage simulation alone or a complete meter-testing solution, the modular architecture of the TESCO Portable Meter Testing Platform provides the flexibility to support a broad range of field applications while reducing equipment weight, simplifying transportation, and protecting existing investments as testing requirements evolve.

Engineered for modern utility applications

Purpose-built for revenue metering and distribution system testing, the Model 6440 generates programmable three-phase voltage outputs from 69–480 VAC, supports both 50 Hz and 60 Hz systems, and delivers 100 VA per phase with ±0.5% voltage setting accuracy and less than 3% total harmonic distortion (THD).

The synthesizer supports multiple utility service configurations commonly encountered in the field, including:
• 69/120 V WYE
• 120/208 V WYE
• 120/240 V DELTA
• 277/480 V WYE
• 240/480 V DELTA

Featuring an FPGA-controlled architecture, isolated Class-D amplifier design, integrated surge protection, and rugged field-ready construction, the Model 6440 delivers precise, repeatable voltage generation for demanding utility environments. The unit operates from a standard 120 VAC power source and provides technicians with laboratory-grade performance in a highly portable package.

One platform, multiple utility applications

The TESCO Portable Meter Testing Platform supports a wide range of field applications, including:
• Revenue meter commissioning
• Meter installation verification
• Revenue meter accuracy testing
• Intertie meter testing
• Advanced metering infrastructure (AMI) validation
• Distributed energy resource (DER) interconnection testing
• Power quality investigations
• Site acceptance testing
• Preventive maintenance
• Meter troubleshooting
• Utility workforce training

The platform supports both electromechanical and solid-state revenue metering technologies, enabling utilities to standardize field testing procedures in legacy infrastructure and modern smart metering deployments.

Built for the future of utility metering

As utilities continue expanding investments in grid modernization, renewable energy integration, electric vehicle infrastructure, and digital distribution networks, accurate field verification has become increasingly critical to ensuring reliable system performance and billing accuracy.

The TESCO Portable Meter Testing Platform provides utilities with a scalable foundation for portable field testing, combining precision voltage generation with advanced measurement and analysis in a modular architecture that grows alongside utility requirements. By expanding the platform with the new Model 6440 Three-Phase Voltage Synthesizer, TESCO continues to deliver innovative solutions that improve safety, increase operational efficiency, and help utilities maintain the highest standards of metering accuracy.

For more information about the TESCO Portable Meter Testing Platform and the Model 6440 Three-Phase Voltage Synthesizer, visit Portable Three Phase Voltage Source for Field Meter Testing | 3PV.

TESCO Metering Model 6440 Three-Phase Voltage Synthesizer