The Seeker power quality recorder includes a variety of mechanisms to retrieve measurements. One of is Modbus, a protocol often used for communication with industrial electronic devices. The protocol is…
Ferroresonance in Solar Step-Up Transformers
This paper explores the unique risks of ferroresonance within solar photovoltaic (PV) installations, specifically focusing on the interaction between step-up transformers and system capacitance. We will examine why solar sites…
Voltage Unbalance Within PQ Canvass Compliance Reports
Power Monitors, Inc.'s PQ Canvass is a secure, cloud-based platform built for power-quality (PQ) analysis. PQ Canvass has a beta feature of automated "compliance reports" that transform data uploaded from…
Symmetrical Components from Stripchart Data
Symmetrical components can be useful in a PQ investigation, especially in cases of voltage imbalance, where the customer's negative sequence current can help determine their contribution to the imbalance. Many…
Getting PQ Data from your SCADA System
DNP3 (Distributed Network Protocol) is a communication protocol used primarily in utilities and industrial settings for automation and control systems. It is designed to enable reliable, secure communication between control…
Record, Diagnose and Troubleshoot Oscillatory Transients
Oscillatory transients are caused by switching operations, nearby lightning strikes, or other impulsive noise exciting electrical resonances present on the network. The most common in the distribution system is defined…
Using PQ Canvass
PQ Canvass is an advanced cloud-based software application that enhances power quality analysis. PQ Canvass revolutionizes power monitoring with its comprehensive browser-based functionality, eliminating the need for additional software, and…
PQ Canvass API Access
Introduction Electric utilities rely on power quality monitoring to maintain grid reliability, meet regulatory requirements, and respond to disturbances across their distribution networks. As monitoring deployments grow — spanning substations,…
Datacenter Power IV
High-speed protective devices in modern datacenters, such as low-voltage circuit breakers with electronic trip units (ETUs) offering instantaneous or short-time protection, are documented to operate in cases where standard Power…
Modern Flicker Analysis Using PQ Canvass and Merlin™
Voltage flicker is one of the most common power quality complaints reported by utility customers. The term flicker refers to visible changes in lighting intensity caused by rapid fluctuations in…
Using PMI’s TLAR and TLAR-S Clamp-Style Current Transformers
Clamp-Style Current Transformers (CTs) are a convenient and safe way to measure current flowing through a conductor. PMI offers the TLAR line of iron core CT clamps in both the…
Defining and Measuring Rapid Voltage Change
Rapid Voltage Change (RVC) represents a specific category of power quality phenomena characterized by a fast transition in the RMS voltage between two steady-state conditions. Unlike a voltage dip or…
