| S.No | Electro Mechanical Relay | Numerical Relay |
|---|---|---|
| 1 | No programmable | Programmable |
| 2 | The reliability is exceptionally low | Higher reliability |
| 3 | Inflexible | Flexible |
| 4 | Single protection | Multi Protection |
| 5 | Can’t be used for SCADA or substation automation system | Compatible to deal with substation automation or SCADA system |
| 6 | Periodically maintenance required | Not required periodic service and adjustment |
| 7 | No feature for data storage | Can accumulate a large amount of data |
| 8 | Larger Size | Compact Size |
| 9 | Plug and dial setting is done by mechanical | Setting values are done by keypad or computer system |
| 10 | Flags, targets are used for a for a visual sign | Digitalized by using an analog to digital conversion mechanism |
An electromechanical relay is a switch that utilizes an electromagnetic coil to open or close electrical contacts, giving control and isolation in different systems.
Numerical relays are programmable, where the qualities and conduct can be modified. They are fundamentally a device utilized for estimating electric parameters in an electrical network and convert them into mathematical information (numerical data) which goes through numerical and logical analysis to settle on tripping an electrical network.
GK Expertise is one of the leading companies in India for numerical protection relay manufacturing and supply. If your industry or company has any electrical protection-related questions, contact us today and get the best solution.