Ammeter and voltmeter

Product Scope

1. Voltmeter
1.1 AC Voltmeter (Moving Iron Movement)
Core Design & Operational Principle
The moving iron AC voltmeter utilizes a robust attraction-type or repulsion-type moving iron movement, optimized for reliable operation in harsh industrial environments. Its non-polarized design eliminates the need for phase-sensitive wiring, making it ideal for general-purpose AC voltage monitoring applications.

Measuring Range
● Direct Measurement Range: 0 ~ 600 V ACThis range supports direct connection to low-voltage AC systems without external signal conditioning, suitable for applications such as panel-mounted monitoring of motor control centers, distribution panels, and standalone equipment.
● Extended Measurement Range (With Accessory Voltage Transformer - PT): 0 ~ 9999 kV ACFor high-voltage system monitoring, the voltmeter is paired with a voltage transformer (PT) calibrated to standard secondary output ratings of 100 V AC or 110 V AC. The primary voltage range (0 ~ 9999 kV) is determined by the PT ratio, enabling safe and accurate measurement of extra-high voltage (EHV) and ultra-high voltage (UHV) transmission lines, substations, and high-voltage equipment.

1.2 AC Voltmeter With Rectifier (Moving Coil Movement)
Core Design & Operational Principle
This voltmeter integrates a precision rectifier circuit with a highly sensitive permanent magnet moving coil (PMMC) movement. The rectifier converts AC input signals to DC, which then drives the moving coil for measurement—delivering superior accuracy and linearity compared to moving iron movements, ideal for precision voltage monitoring tasks.

Measuring Range
● Direct Measurement Range: 0 ~ 600 V AC Supports direct connection to low-voltage AC systems, with enhanced measurement precision suitable for laboratory testing, process control systems, and precision equipment monitoring.
● Extended Measurement Range (With Accessory Voltage Transformer - PT): 0 ~ 9999 kV AC Compatible with external PT s rated for 100 V AC or 110 V AC secondary output, enabling safe measurement of high-voltage AC systems up to 9999 kV. The PT isolates the voltmeter from high-voltage circuits, ensuring operator safety and device protection.

1.3 DC Voltmeter (Moving Coil Movement)
Core Design & Operational Principle
Featuring a permanent magnet moving coil (PMMC) movement, this DC voltmeter offers exceptional sensitivity and accuracy for direct current voltage measurement. The movement responds to the direction and magnitude of DC current, making it suitable for both positive and negative polarity DC systems (with appropriate terminal wiring).

Measuring Range
● Direct Measurement Range: 0 ~ 2000 V DC This broad direct measurement range eliminates the need for external shunts or signal conditioners for most medium-voltage DC applications, including battery banks, DC motor drives, solar PV systems, and DC distribution networks. For ultra-high DC voltage measurements beyond 2000 V, external voltage dividers can be integrated as a custom solution.