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China Ammeter and Voltmeter Suppliers - High-Quality Factory Solutions for AC/DC Measurement
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 0 ~ 600 V AC This 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 0 ~ 9999 kV AC — With Accessory Voltage Transformer (PT) For 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 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 0 ~ 9999 kV AC — With Accessory Voltage Transformer (PT) Compatible with external PTs 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 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.
Frequently Asked Questions (FAQ)
What is the difference between a Moving Iron AC Voltmeter and a Moving Coil AC Voltmeter with Rectifier?
The Moving Iron AC Voltmeter uses an attraction-type or repulsion-type iron movement and is well-suited for harsh industrial environments due to its robust, non-polarized design. The Moving Coil AC Voltmeter with Rectifier integrates a precision rectifier with a PMMC movement, offering superior accuracy and linearity, making it more suitable for laboratory testing and precision monitoring tasks.
Can these voltmeters measure high-voltage AC systems above 600 V?
Yes. Both the AC Moving Iron Voltmeter and the AC Moving Coil Voltmeter with Rectifier support an extended measurement range of 0 ~ 9999 kV AC when paired with an accessory Voltage Transformer (PT) rated for a secondary output of 100 V AC or 110 V AC. The PT safely isolates the meter from high-voltage circuits.
What is the maximum direct DC voltage the DC Voltmeter can measure without external accessories?
The DC Voltmeter (Moving Coil Movement) supports a direct measurement range of 0 ~ 2000 V DC without requiring external shunts or signal conditioners. For voltages exceeding 2000 V DC, external voltage dividers can be integrated as a custom solution.
Is the Moving Iron AC Voltmeter suitable for use in industrial panel boards and motor control centers?
Yes. The Moving Iron AC Voltmeter is specifically designed for general-purpose AC voltage monitoring in industrial environments. Its direct measurement range of 0 ~ 600 V AC makes it ideal for panel-mounted monitoring of motor control centers, distribution panels, and standalone industrial equipment.
Can the DC Voltmeter measure both positive and negative polarity DC systems?
Yes. The PMMC movement in the DC Voltmeter responds to both the direction and magnitude of DC current flow. With appropriate terminal wiring, it can be used to monitor both positive and negative polarity DC systems, including battery banks and DC motor drives.
What secondary output ratings are supported for the Voltage Transformer (PT) used with these voltmeters?
The voltmeters are compatible with Voltage Transformers (PTs) calibrated to standard secondary output ratings of 100 V AC or 110 V AC. The actual primary voltage measurement range (up to 9999 kV) is determined by the specific PT ratio selected for the application.