The Digital iAMP / iVLT / iFRE meters are part of Schneider Electric's 9 Series, offering DIN-rail mounted ammeters, voltmeters, and frequency meters for basic panel instrumentation. Here's an overview of these products:

1. iAMP: iAMP meters are digital ammeters that provide accurate measurement of electrical current in a circuit. These meters display current values digitally, offering precise readings and often additional features such as communication capabilities for integration with monitoring systems. They are commonly used in electrical panels for monitoring and control purposes.
2. iVLT: iVLT meters are digital voltmeters that provide accurate measurement of electrical voltage in a circuit. Similar to iAMP meters, iVLT meters display voltage values digitally, offering precise readings and additional features for enhanced monitoring and integration with control systems. They are often used alongside ammeters in electrical panels for monitoring and troubleshooting purposes.
3. iFRE: iFRE meters are digital frequency meters that measure the frequency of an electrical signal in a circuit. These meters display frequency values digitally, providing accurate readings for monitoring and control purposes. They are commonly used in applications where frequency measurement is critical, such as power generation, distribution, and motor control.
4. DIN-rail Mounting: These meters are designed for easy installation on DIN rails, allowing for flexible mounting options in electrical panels and enclosures.
5. 9 Series: The Digital iAMP / iVLT / iFRE meters are part of Schneider Electric's 9 Series product line, which includes a range of solutions for power distribution, protection, and control. The 9 Series is known for its reliability, efficiency, and ease of use, offering solutions for various applications in industrial, commercial, and residential settings.
6. Basic Panel Instrumentation: These meters are intended for basic panel instrumentation, providing essential monitoring of current, voltage, and frequency levels in electrical systems. They are suitable for a wide range of applications where simple, reliable monitoring is required.

Overall, the Digital iAMP / iVLT / iFRE meters offer accurate and reliable measurement capabilities for basic panel instrumentation, providing users with flexibility, precision, and ease of integration into monitoring and control systems.