The SIPROTEC 7SK81 is a multi-functional motor protection relay. We designed it to safeguard asynchronous motors of all sizes, protecting objects with rated currents from 20 A to 2500 A using low-power current transformers.
Protect your asynchronous motors from electrical faults and operational challenges. The SIPROTEC 7SK81 offers extensive protection functions and flexible system integration to provide high operational reliability, allowing your personnel to react safely.
Benefit from 4 low-power current transformer inputs, covering diverse motor applications. Flexible protection functions and an integrated automation level help you adapt to system requirements and optimize your investment. A clear six-line display and 9 programmable function keys enable quick responses to process states.
Safeguard asynchronous motors of all sizes with a single, adaptable relay. Cover a broad range of primary rated line currents from 20 A to 2500 A, ensuring robust protection across various operational scales and applications.
Respond flexibly to evolving system needs so your budget goes further. Benefit from exchangeable interfaces, adaptable protection functions and an integrated automation level to reduce your costs.
Ensure high operational reliability with freely assignable LEDs and a clear six-line display for process states. React quickly and safely using up to 9 function keys for improved overall system management.
Utilize 4 low-power current transformer inputs and optionally 3 low-power voltage transformer inputs. Cover primary line currents from 20 A to 2500 A, protecting objects across a wide range using low-power current transformers.
Protect asynchronous motors of all sizes with the multi-functional SIPROTEC 7SK81 relay. Adapt to system requirements using exchangeable interfaces, adaptable protection functions and an integrated automation level.
Access diverse protection functions: overcurrent (instantaneous, definite time, directional), undercurrent monitoring, thermal overload and breaker failure protection. Monitor temperature, load jam and locked rotor conditions.