#Product Trends
Solutions for on-line partial discharge monitoring on rotating machines
Early detection of insulation defects prevents machine failure
Motors and generators are important components in the power supply. Knowing their insulation condition at all times helps to prevent failures. On-line partial discharge (PD) monitoring detects insulation defects early so that corrective action can be taken to prevent failure and to extend the service life of motors and generators.
OMICRON offers both temporary and permanent on-line PD monitoring solutions for motors and generators. They provide asset managers with continuous insulation condition status during specified time intervals while the machines are running under real service conditions.
OMS 605 for temporary on-line PD monitoring
OMICRON’s OMS 605 is designed for temporary on-line PD monitoring of a variety of high-voltage assets, including motors and generators. The system is contained within a rugged, waterproof trolley style case for easy transport. The simple-to-use, pre-wired plug-and-play modules enable fast system setup. A notebook PC can be attached to the OMS 605 for display and analysis of monitor-ing data.
MONGEMO for permanent on-line PD monitoring
OMICRON’s MONGEMO permanent on-line PD monitoring system is capable of monitoring PD activity on single or on several rotating machines simultaneously. With the convenient web interface, users can remotely configure the monitoring system, view real-time data and historical trends, and analyze the collected raw data. Advanced diagnostic features such as automatic cluster separation enable convenient visual evaluation of PD data. The system also supports multiple industrial communications standards for display of monitoring data from third-party devices and data export to SCADA systems.
Real-time data and historical trends
Both types of on-line PD monitoring systems record real-time data and visualize trends in PD activity. An alarm is triggered only in case of service-relevant PD activity that exceeds limits
pre-selected by the user. A list of events that triggered the warning or alarm is provided in an event log. The early detection of changes in PD activity enables asset managers to decide if and when to schedule downtime and to plan maintenance activities.
Advanced PD diagnostic technology
The high PD measurement sensitivity of both monitoring systems is based on advanced
OMICRON technology for noise suppression and PD source separation. Multiple PD sources are distinguished from external noise through synchronous multi-channel measurements and advanced methods like 3PARD (3-Phase Amplitude Relation Diagram).
Expert advice and support
OMICRON provides users with complete guidance and support during the design, set-up and use of the monitoring systems. This includes on-site consultations to evaluate monitoring needs; customized system design, installation, commissioning and training; as well as support with data evaluation and reporting.
Continuous detection of insulation defects
Statistics for rotating electrical machines show that a major source of their failure is linked to
defects in stator insulation. A majority of these defects can be detected early through the
continuous, permanent monitoring of PD activity. PD occurs in the stator insulation system of generators and motors, where local electric field stress exceeds the local electrical strength.
Rising PD activity indicates insulation degradation
The insulation materials typically used for rotating machines are resistant to a certain level
of PD. However, an increase in PD activity over time often indicates insulation defects and
degradation caused by operational stress factors and aging processes. If left unattended, this could lead to failure and serious consequent damage.
Monitoring optimizes maintenance and asset planning
On-line PD monitoring is a well-established technique used to continuously assess the condition of a stator winding insulation system. PD monitoring data helps organizations to optimize their asset management, maintenance efforts and investment planning. Machine failures can be avoided through the timely implementation of condition-based maintenance and repair measures to ensure a longer service life.
Ideally on-line PD monitoring can be used at the beginning when a motor or generator is put into operation to continuously check for symptoms or evidence of insulation defects through-out its service life. Taking the necessary machine off-line for further off-line diagnosis and condition-based maintenance can be planned in advance and based on necessity.
Company profile
OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions. The application of OMICRON products allows users to assess the condition of the primary and secondary equipment on their systems with complete confidence. Services offered in the area of consulting, commissioning, testing, diagnosis and training make the product range complete.
Customers in more than 140 countries rely on the company’s ability to supply leading edge technology of excellent quality. Service centers on all continents provide a broad base of knowledge and extraordinary customer support. All of this together with our strong network of sales partners is what has made our company a market leader in the electrical power industry.
Press contact
OMICRON electronics GmbH
Marketing Communications
Martina Stieglmeier
martina.stieglmeier@omicronenergy.com
www.omicronenergy.com
