Alver Power Standard Energy Meter (Single Phase)
Product Overview
The Alver Power Standard Energy Meter (Single Phase) is a precision electrical measuring instrument designed for revenue-grade billing, sub-metering, and energy monitoring. It converts high-voltage AC signals into pulsed or digital outputs, offering a balance of industrial durability and measurement accuracy for residential, commercial, or light industrial applications.
Key Features & Specifications
- Precision Measurement: Typically designed to meet Class 1.0 or Class 2.0 accuracy standards (IEC 62053-21/22 compliant). It measures current (A) and voltage (V) to calculate active energy (kWh) with low self-consumption.
- Voltage & Current Ratings: Standard operating range of 230V AC or 120V AC at 50/60Hz. Base current (Ib) is often rated at 5A, with a maximum current (Imax) supporting up to 30A or 60A for direct connection. For higher loads, CT-operated variants are available (e.g., 5A input).
- Display & Interface: Equipped with a mechanical dial (aluminum disc) or an LCD digital display (6+1 digits). Digital versions usually feature a "scroll button" to cycle through Voltage, Current, Power Factor, and Cumulative Energy.
- Connection Type: Single-phase 2-wire configuration (Phase In/Out and Neutral). Terminal blocks typically use captive screws compatible with 25mm² to 35mm² copper cables.
- Pulse Output: Often includes a passive isolated transistor output (LED pulse indicator) for remote monitoring and interface with Automatic Meter Reading (AMR) systems.
Construction & Design
- Enclosure: Made with flame-retardant, high-impact ABS or Polycarbonate plastic (UL94-V0 rating). Covers are transparent for visual inspection of internal arcs or damage.
- Terminal Cover: Includes a removable terminal cover plate with a security sealing facility (meter sealing hooks) to prevent tampering and unauthorized access.
- Protection Class: Typically IP50 (dust-protected) or IP51 for indoor panel mounting.
Performance & Reliability
- Starting Current: Highly sensitive, operating at <0.004 Ib (e.g., <20mA for a 5A meter) to detect phantom loads.
- Insulation: Designed to withstand dielectric test voltage of 4 kV for 1 minute between current circuits and housing.
- Surge Protection: Built-in varistor (MOV) protects against lightning-induced surges or switching transients in the grid.
Application Scenarios
- Tenant Billing: Sub-metering for apartments, rented shops, or office floors.
- Power Distribution Panels: Feeder metering in homes or small workshops.
- EV Charging: Measuring energy draw for low-power (3.7kW/7.4kW) single-phase wall boxes.