AMBLYONIX INDUSTRIAL INSTRUMENT www.amblyonix.com The Model 800 HV Tester The Model 800 Wireless HV Phase Tester measures phase sequence and real-time phasing relationships on power lines up to 110 kV using Bluetooth to communicate with the hand-held interface to provide measured values as well as audible indications. A brightly back-lit display indicates phasing, phase angle, frequency, and vector diagrams instantaneously …
NAMO Visits Promote NETA Certification in the Military
NETA Approved Military Organization (NAMO) is a membership classification designed to serve military organizations whose missions align with NETA’s mission. Military personnel are provided with a qualification framework and a professional development path to obtain certification in accordance with nationally recognized industry standards. NETA’s NAMO Advisory Committee members, along with support from NETA staff, perform face-to-face visits with companies in the …
Advancements in the Industry: Acceptance and Maintenance Testing for Medium-Voltage Electrical Power Cables — Part 2 of 3
In Part 1 of our three-part series on acceptance and maintenance testing for medium voltage electrical power cables, we reviewed cable construction and cable aging characteristics and started our discussions on cable testing options and philosophies. In Part 2 of this article, we move away from undervoltage testing and explore high potential testing techniques. HIGH POTENTIAL TESTING PERFORMED WITH DIRECT …
Partner Spotlight — OMICRON electronics: Leading with People
NETA’s Corporate Alliance Partners (CAPs) are a group of industry-leading companies that have joined forces with NETA to work together toward a common goal: Improve quality, safety, and electrical system reliability. In our continuing CAP Spotlight series, NETA talks to Jackie Peer, Head of Strategic Business Development about the thought leadership and subject-matter expertise at OMICRON electronics. NWJ: What are …
Predictive Motor Maintenance: Static, Dynamic, and On-Line Testing
This article reviews current electrical testing methods and trends in the operational health of electric motors in the context of successful predictive maintenance programs. It explains the concepts of static motor testing — testing a motor that is not running — as well as dynamic motor monitoring, which involves analyzing motors while they are in service or operating within their …
Staying Current with NERC Regulations
In the upcoming years, changes to the existing NERC standards and approved models will be proposed. These changes will impact the synchronous generator (SG) compliance approach and representation. This article outlines proposed changes relevant to generator owners and the impacts on compliance efforts for two such standards: MOD-025 and PRC-019. We also briefly discuss the newly proposed generator model, GENQEC, …
Detecting and Locating On-Line Partial Discharge
Power cables are important assets in transmission networks for the reliable operation of power systems. To prevent catastrophic failures in underground cables and terminations, it is important to know how to leverage the various types of available sensors that can detect PD and locate the source so that appropriate action can be taken to avoid in-service failures. This article answers …
What Does Insulation Thermal Class Mean for Electrical Machines?
How hot is too hot? Motors and transformers have maximum operating conditions, but can I exceed those ratings on occasion and not damage the equipment? In my years as an electrical insulation application consultant, the most common questions posed by end users regard insulation thermal classes and what effect they have on machinery reliability and life expectancy. Many articles have …
Electromagnetic Imperfection Measurements for Stator Core Condition Assessment
The stator core of a rotating machine is composed of multiple stacked layers to minimize eddy current losses. A short between two or more layers leads to higher local eddy currents. This in turn can lead to local hot spots, which in a worst-case scenario can cause a partial core melt and eventually damage the machine. A ring flux (or …
Insulation Assessment Using Non-Invasive Techniques
The status of the insulation in a rotating machine can be evaluated using various testing techniques. Static tests are performed while the motor is disconnected from the system, typically during manufacturing, commissioning, maintenance, or repairs. The goal of a static test is to provide an accurate picture of the machine’s electrical characteristics. Static tests can often be performed from the …