Modern electric motors and pumps are commonly controlled by power-conversion equipment, including soft starters and variable frequency drives (VFD). These types of power conversion equipment can cause problems with traditional ground-fault monitoring techniques, including DC or low-frequency AC signals, harmonics, and carrier frequencies. Bender products use advanced ground-fault monitoring technology to detect and report accurate ground-fault readings throughout the entire power conversion process. Many products are available for solidly grounded, high-resistance grounded, and ungrounded electrical systems.
Bender ground-fault relays provide accurate readings on AC and DC systems. They can be adjusted to respond to the fault level that matters to the customer without nuisance tripping. They can be used for preventative maintenance by trending leakage to ground over time. Ground-fault relays are fully compliant with numerous NEC Articles and CEC Rules. Bender also creates devices designed for and compliant with many industry-specific requirements, including solar, mining, pulp and paper, water and wastewater, and more.