Motor protection relay function

Motor protection types include overload, short-circuit, ground fault, phase failure, phase sequence, under-voltage, over-voltage, and locked rotor protection—each safeguarding against specific electrical or mechanical faults.

Schneider protection relay P127

P127 Protection relay

How is REF615 generated?

The ABB production department implements rigorous and comprehensive control over every stage of the production process, ensuring consistent quality, operational efficiency, and adherence to the highest international standards at all times.

fluorescent optical fiber temperature device

The fluorescent optical fiber temperature sensor works by detecting how a material’s fluorescence lifetime changes with temperature—excited by light, it emits fluorescence, and measuring its decay time gives precise temperature readings. Sensing performance, widely used in biodetection and environmental monitoring fields

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SIEMENS Protection Relay of 7SX8000

How to replace the old protection relay? This video will tell you how to do.

Use the device buttons of the P3U30 to control the opening and closing of the circuit breaker

use the device buttons of the P3U30 microcomputer protection device to control the opening and closing of the circuit breaker

Hirschmann Industry Switch

The Hirschmann RSPE35 is a rugged industrial gigabit switch engineered for harsh environments.

Under Frequency Load Shedding (UFLS)

UFLS is a critical protective mechanism in power systems that prevents blackouts by automatically shedding predetermined load blocks when frequency drops due to generation-load imbalance. Using relays and circuit breakers, it acts as a last resort to stabilize frequency and avoid system collapse, ensuring reliability and preventing cascading failures.

symmetrical components

In three-phase power systems, imbalance is caused by faults, uneven loads or equipment problems Question caused. Symmetric component method analysis: positive sequence indicates normal operation, three-phase Equal amplitude and mutual difference of 120 ° rotate in the same direction; Negative sequence triple equal amplitude counter-rotation, It is caused by asymmetric fault, causing the equipment to heat up; Zero sequence three identical phases, Common in ground faults, affecting protection and safety.