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Carlo Gavazzi is releasing a smart power-quality analyser for measuring current, voltage, power, energy and harmonics.

The WM40-96 smart power-quality analyser is claimed to offer precise parametric analysis, control, data stamping and retransmission.

It is packaged in a compact modular format to simplify installation and streamline inventory management.

With applications throughout the energy management market, the analyser may be of particular interest to switchgear panel builders serving medium, large and heavy industry.

Starting with a base unit that provides the display, touch-panel, power supply and measurement inputs, users can then add up to three slimline modules to the rear for alarms, pulse outputs, I/O and data communications interfaces.

A mono LCD occupies much of the base unit’s 96mm-square frontage.

All necessary information is available at a glance on the front panel’s customisable home page, which is readily configured by the user.

Values of actual vs installed power are displayed continuously to provide immediate alerts to potential power overloads.

White and blue backlights enhance readability and the backlight alternates these colours in sequence to indicate alarm conditions.

Up to 16 virtual alarms can be configured by the user for all measurements with Or/And logic; these can be linked with up to four relay outputs or optionally up to six static outputs.

Also on the front panel is an optical communication port to enable easy programming and fast access to measurements.

Touch-panel technology is used for selecting from the four main variable areas: energy metering; current-voltage-frequency metering; power and power-factor metering; and harmonic analysis.

The WM40-96 is rated Class 0.5 (kWh) according to EN62053-22, Class C (kWh) according to EN50470-3, Class 2 (kvarh) according to EN62053-23 and ANSI C12.20, CA 0.5, ANSI C12.1 (revenue grade).

Errors are better than +/-0.2 per cent RDG for current and voltage.

Additional intelligent analysis includes averaging, minimum and maximum values of all the system and single-phase variables, four quadrant energy measurements, plus total harmonic distortion (THD) and total demand distortion (TDD) calculations.

FFT harmonic analysis is carried out up to the 32nd harmonic (current and voltage), ensuring dependable measurements for load control and alarming.

While the base module alone acts as a simple monitoring device, the meter is completed by stacking low-profile modules on the rear of the base unit.

Up to three flat modules can be added: one each of type A, B and C.

Depth behind the panel is 50mm with a single option module.

Dual-channel relay output (SPDT) and dual-channel static output (AC/DC Opto-Mos) modules are type A.

Type B designates analogue outputs including a dual-channel 20mA current module and dual-channel 10V DC voltage device.

Data communications facilities are added using type C modules: a fast RS485/RS232 serial port, Modbus over Ethernet TCP/IP interface and a BACNet-IP port are currently available.

Ports have integral memory to provide data and event stamping for up to 10,000 events.

The WM40-96 carries CE marking and UL certifications.

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