Konrak’s Voltmeter and Ammeter Selector Switches are critical components in electrical systems, enabling precise measurement and monitoring of voltage and current across multiple circuits. Designed for industrial, commercial, and utility applications, these switches simplify complex electrical setups by allowing technicians to toggle between different measurement points without rewiring—enhancing efficiency, safety, and accuracy. Below, we expand on the technical nuances, wiring best practices, and real-world use cases of these essential devices, tailored for engineers, maintenance teams, and procurement professionals.
1. What Are Voltmeter & Ammeter Selector Switches?
A voltmeter selector switch (VSS) and ammeter selector switch (ASS) are rotary switches that connect a single voltmeter or ammeter to multiple circuits. Instead of installing separate meters for each circuit (a costly and space-consuming approach), these switches let users select which circuit to measure—reducing equipment costs and streamlining panel design.
Key Types by Design
Konrak offers one primary configurations to suit diverse system requirements:
- Rotary Selector Switches: The most common type, featuring a dial with labeled positions (e.g., “Line 1,” “Line 2,” “Neutral”). Ideal for systems with 3–12 circuits, they provide tactile feedback and clear visual indication of the selected circuit.
Functional Classification
- Single-Range Switches: Designed for fixed voltage/current ranges (e.g., 0–500V AC). Best for systems with consistent load profiles (e.g., residential panelboards).
- Multi-Range Switches: Allow users to adjust the meter’s range via the switch (e.g., 0–10A / 0–100A). Essential for systems with variable loads (e.g., industrial machinery, renewable energy installations).
2. Important Diagrams
Ammeter Selector Switches and Voltmeter Selector Switches are commonly used in industrial measurement applications. They feature four main types of contact diagrams, with two focused on current measurements (61325 and LH3/3) and two on voltage measurements (61313 and YH5/3).
It’s crucial to note that there are often more contact diagrams available than recognized. For instance, Voltmeter Selector Switches come in configurations of 3, 4, 5, 6, or 7 positions, segmented into 2, 3, or 4 stages. Similarly, Ammeter Selector Switches are available in 3 or 4 positions, segmented into 3, 4, 5, or 6 stages.
Refer to the provided contact diagrams for detailed information. Keep in mind that there are numerous contact diagrams, each tailored to specific functions for Voltmeter Selector Switches and Ammeter Selector Switches across various electrical circuits.
3. Ammeter Selector Switches:
4. Voltmeter Selector Switches:
5. Final Thoughts
Voltmeter and ammeter selector switches are more than just “components”—they are the eyes of an electrical system, providing the data needed to keep operations running smoothly. Konrak’s switches combine precision, durability, and ease of use, making them the top choice for industrial and commercial applications. Whether you’re designing a new panel or upgrading an existing system, our team is here to help you select the perfect switch for your needs.
Find more informations about the Rotary Cam Switches in below link, you can customize your own special switches without extra charge.
Rotary Cam Switches – Konrak Switch Factory
You can find the introduction of Rotary Cam Switches on Youtube.
