In August 2024, ZTZ Services’ ZCVM-1001 On-Line Transformer Bushing Monitoring System and TransMAX 2000 On-Line Transformer Bushing Monitoring System with Partial Discharge Detection became the first-ever FM Approved monitoring systems for transformer bushings. The systems were tested and certified to FM Approvals Standard 6510 for Condition Monitoring Systems for Switchgear and Other High Voltage Electrical Equipment.
This standard specifies the performance and personal safety requirements for the testing and certification of electrical switchgear components, systems, and other high voltage electrical equipment. Through the FM Approvals Certification Process, examination and tests were performed to evaluate the suitability of the products, the performance of the products as specified by the manufacturer and required by FM Approvals, as well as the durability, safety, and reliability of the products.
ZTZ Services’ ZCVM-1001, a two-part system with bushing sensors and a monitoring system cabinet, monitors the leakage current present at the test taps of transformer bushings. Depending on the configuration, up to five separate algorithms are used to determine bushing health – contributing to elevated confidence in bushing alarms. TransMAX 2000 builds on the capabilities of ZCVM‑1001 with interpretation of partial discharge <20 MHz. Some types of partial discharge can develop into surface tracking or insulation failure, so it is important to continuously monitor these levels.
With the first two FM Approved monitoring systems for transformer bushings, present and prospective installers and users of ZTZ Services’ monitoring systems now have confirmation that these products successfully met the requirements of FM 6510, verifying they can perform as expected under demanding circumstances.
Continuous monitoring systems such as ZTZ Services’ ZVCM-1001 and TransMAX 2000 provide information relating to the health of the bushing along with indication on their stability, whether defects are developing and at what rate of development. Providing such information remotely makes these systems ideal for industries such as wind and solar power generation which are often located in remote areas. This configuration allows the operator to schedule further on-site testing or replacement of the bushing without visiting the site. This significant addition to the diverse collection of FM Approved products can be found in the Approval Guide. FM Approvals encourages the development and use of tested and certified products that improve and advance property loss prevention practices. The global acceptance of the FM APPROVED certification mark supports expanded distribution for manufacturers of tested and certified products as well as the availability to end-users worldwide.
If you are interested in learning more about third-party certification, FM Approved condition monitoring solutions, or other property loss prevention products and services, please contact Patrick Byrne (Operations Vice President – Group Manager, Electrical Systems) at (781) 255-4846 or patrick.byrne@fmapprovals.com.