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Setra Blog

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Jun 22, 2017 11:25:00 AM

How to Select a Power Meter

What Are You Monitoring?

One critical consideration when searching for a proper power meter is to determine what you're measuring. Is the monitored load signal-phase, split-phase or three-phase? What voltage/current ranges are going to be monitored? 

If you're interested in a power meter for residential or light commercial applications, then typically a single or split-phase meter would be the best cho

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Jun 8, 2017 7:19:00 AM

What is Total Harmonic Distortion?

Imagine a tone being played by two musical instruments -  let’s say middle-C (261.63 Hz). While the pitch played on a piano may be the same as on an electric guitar, its timbre is very different. The sound wave generated from a piano or a simple synthesizer is relatively simple and clean, but the sound wave coming from an electric guitar is often very distorted for effect and contains natural harmonic overtones.

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Jun 1, 2017 6:51:00 AM

What is the difference between Rogowski Coils and conventional CTs?

Understanding specific job requirements, such as performance, installation, amperage load and environmental factors is critical to selecting the proper current transformer for an application. Conventional current transformers (CTs) do come with their limitations as they are difficult to install and are lacking in performance and measurement range. Rogowski coils have significant advantages with regards to installation, cost and performance.

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May 15, 2017 9:03:55 AM

What is Submetering?

Submetering is the installation of metering devices with the ability to measure energy usage after the primary utility meter.  Submetering offers the ability to monitor energy usage for individual tenants, departments, pieces of equipment or other loads individually to account for their actual energy usage.  With submetering, a clear and accurate picture of how and when energy is being consumed inside a facility is created.

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May 4, 2017 6:33:00 AM

Is Building Automation and the Internet of Things Related?

The Internet of Things (IoT) is changing the way people run their homes. More and more devices are becoming available to consumers that allow them to automate their thermostats and regulate their power consumption, often-times controlling these systems from the phone in their pocket. Products like the Nest thermostat and the Sense home energy monitor provide homeowners convenient tools that also help save utility costs.

Building Automation

In commercial and industrial buildings, there are similar (albeit far more robust) systems and protocols used for the same purposes called building automation. Building automation is the automatic and centralized control of a building’s heating, ventilation, air conditioning, security, electrical, and other systems through a Building Automation System (BAS).

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Mar 23, 2017 6:19:00 AM

What is peak demand?

Looking at your electric bill can be a daunting task. There are many factors that can affect your bill’s total — factors that are only amplified in large commercial and industrial sites.

One such consideration is peak demand. Peak demand is the largest instance of power usage in a given time frame, typically a rolling fifteen minute window. Measured in kilowatts (kW), peak demand is different than consumption. Total consumption  is measured in kilowatt hours (kWh) over a given period of time (e.g. monthly, quarterly, etc.). 
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Mar 16, 2017 6:51:00 AM

What is power factor?

The power flowing through an alternating current (AC) load isn’t always pulling its full weight. Every AC circuit has some degree of non-working power as part of its total power reading and this can affect the amount of power a system is truly drawing.

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Feb 21, 2017 7:02:00 AM

Can I Put a Power Meter Inside an Electrical Panel?

Can you? Of course you can place a power meter inside an electrical panel depending on the type of power meter. The great advantage of UL61010 vs. UL508, is that UL61010 allows for a meter to be mounted inside of an electrical panel, avoiding costs of installation and additional equipment required. The 61010-1 safety standard states meters must be connected to a dedicated circuit breaker, but does not require the use of fused voltage leads is required as the circuit breaker is present to protect the wiring should an overcurrent situation oc

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Feb 13, 2017 5:42:00 AM

Why Choose Rogowski Coils?

Many electricians and contractors are moving towards using Rogowski Coils because of the time saved during installation and the reduced shipping costs for high amperage requirements. Because of the size, weight and flexibility of a Rogowski Coil, installers can save significant time and labor because of the ease of surrounding conductors of all sizes. However, what most people don’t realize is that Rogowski Coils have many technical advantages over standard split-core or “donut” CT’s which can help improve monitoring energy in different applications.

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Feb 9, 2017 6:59:00 AM

The AHR 2017 Experience

Thank you to all who visited us at Booth C1452 in the Building Automation and Controls section of the AHR Expo this year in Las Vegas, Nevada! We enjoyed seeing both new and familar faces! The world's largest HVACR event was anything but boring and we think the 60,000 attendees would have to agree.

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