7sj81 High Efficiency Electrical Digital Over Current Relay For Industrial Warranty: Standard

Positioning the business in front of the target customers, we are occupied as a trader, supplier, and exporter of 7SJ81 Over Current Relay in Navi Mumbai, Maharashtra, India.
The SIPROTEC Compact 7SJ81 provides 4 low-power current transformer inputs and optionally 3 low-power voltage transformer inputs. With the same low-power current transformer (LPCT) a wide range of primary-rated line currents can be covered. Objects with rated currents in the range of 40 A to 5000 A can be protected when using low-power current transformers.


The following low-power current transformer ratios are suitable for the following primary current operating ranges:

a c100 A/225 mV for a primary operating current range of 40 A 600 A
a c50 A/22.5 mV for a primary operating current range of 200 A 3000 A
a c400 A/225 mV for a primary operating current range of 200 A 2500 A
a c100 A/22.5mV for a primary operating current range of 400A 5000 A

SIPROTEC 7SJ81 is a multi-functional motor protection relay. It is designed for the protection of asynchronous motors of all sizes. The relays have all the functionality to be applied as a backup relay to a transformer differential relay.

The relay provides numerous functions to respond flexibly to the system requirements and to deploy the invested capital economically. Examples of this are exchangeable interfaces, flexible protection functions, and the integrated automation level (CFC).