Recent content by Tim Law

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    Question: Why are solid core current transformers color coded (black & white, red & white, and blue & white)?

    Answer: Industry convention for color coding in 3 Phase 208V electrical systems assigns the color black to phase A, red to phase B, Blue to phase C, and white to Neutral. Leviton‘s 100A and 200A solid core CTs are coded with the same colors (on the body of the CTs and on the wires) to help...
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    Question: Can I extend the CT leads?

    A: Yes. You should try to avoid extending the native CT leads by locating the meter next to the circuit breaker. If you must extend the leads, take into consideration the following inaccuracy contributors. Here are some of the factors that will affect accuracy when using long CT leads: 1. Wire...
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    Question: Can I route voltage input wires and current sensing leads through the same conduit?

    Answer: Yes. CTs must have 18 AWG or heavier wires with proper VAC insulation rating (check local electrical code).
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    Question: Can I use the S3300/S3500 meter in a 3 phase center tapped (high side) delta configuration?

    Answer: The meter should not be used in this configuration. The per-phase energy, power, voltage and amperage values in this configuration will be correct, however the Line-to-Line voltage will be calculated for a balanced 3phase system, and will not represent the actual L-L voltage. If the...
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    Question: Can I use the S3300/S3500 meter in a 3 phase corner grounded delta configuration?

    Answer: Yes. The meter must be installed with the neutral terminal disconnected. Note: Line-to-Neutral voltages will be reported for a virtual neutral. (e.g. L-L=480V, L-N=277)
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    Question: Can I use the Series 3300/3500 meter on a single phase 3-wire system?

    Answer: The meter should not be used in this configuration. The per-phase energy, power, voltage and amperage values in this configuration will be correct; however the Line-to-Line voltage will be calculated for a 3phase system, and will not represent the actual L-L voltage.
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    Voltage at X1/X2 terminals

    It's a valid question. I think the attached document will help to explain how these CTs work. Following is an excerpt with a summary of the math used with these CTs. The principle of operation of a CT is the sensing of the magnetomotive force around a current-carrying conductor. The CT...
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    CTs and Coils for Series 6000

    The Series 6000 split core CTs (CTSxx part#) do use a 333mV output, but they are not interchangeable with our other 333mV CTs. The S6000 meters are designed for use with these custom, auto-ranging CTs and they require an RJ12 connection. The Rogowski CTs are not 333mV. Most Rogowski CTs...
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    MAC/Serial Number for EMHXD?

    There are 3 places to find the device ID (serial number): There is a sticker on the back of the unit, if it hasn't been mounted. It is displayed on the login screen. It is also available from the System/Identification tab in the main user interface
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    Data Collection from the A8810 and A7810

    This document provides instructions on gathering data from Leviton Data Acquisition Servers (DAS)
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    Series 4000/4100 Metering on a Three Phase, Four Wire Delta Service

    This document summarizes the application of a Series 4000/4100 Meters on a three phase, four wire delta service for a cost-effective solution for monitoring multi-phase tenant energy usage.
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    Series 8000 Delta wiring

    The purpose of this technical note is to identify specific installation requirements associated with the S8000 Meter platform for 3PH Delta service configurations.
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    Current Transformer Paralleling

    This article summarizes the application of paralleling Current Transformers to measure current through more than one electrical conductor.
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    BACnet Server for the Leviton Energy Monitoring Hub (EMH)

    An overview of the BACnet functionality in the Leviton EMH (A7810, A8810, A8812)
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    Tech Article - Cable Types and Max CT Wire Lengths

    This technical article identifies typical wire recommendations and maximum lengths for the wide variety of cables used with VerifEye devices.
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