Numerical relay testing procedure

Test main voltage transformers. It represents important advantages in reliability, space and economics compared to conventional protection arrangements. At all new protective relay installations, the re lays should be adjusted in accordance with the settings given in the relay data sheets furnished by the Denver Office, after which, tests should be made to determine if the actual operating characteristics check with the adjustments made.

The Denver Office, Facilities Engineering. Commissioning Numerical Relays , Mike Young and.

The procedure must start from the furthest substation, then continued by moving back towards the .

Additional features of numerical relays 7.

Evidence shall show an understanding of procedures for the location and rectification of faults in electrical equipment. Steve Turner,Senior Applications Engineer, Beckwith Electric Co. Anumerical protection relay provides multiple functions and typically uses algorithms that do not work on the same principles as older electro- mechanical relays. Often, numerical relays are still tested.

Numerical transformer differential relays require careful consideration as to how to test properly. These relays pro- vide different types of protection such as restrained phase differential, high set phase differential, restrained ground differential and overcurrent protection. All protection ele- ments that are enabled . TESTING NUMERICAL TRANSFORMER DIFFERENTIAL. Topics: ▫ Transformer Differential Boundary Test. Ground Differential Sensitivity Test.

Secondary Transformer Protection. Harmonic Restraint for Transformer Inrush. Internet Version of This Manual Created. May Differ From the Original, but the Contents Do Not. Testing Numerical Transformer Differential Relays.

Thus, a new standardized testing methodology for transformer differential protection relay from any manufacturer will. During secondary testing of numerical transformer differential relays , the appropriate secondary . In order to understand the presented testing methods some basic information about power system will be reviewed. These relays provide different types of protection such as restrained phase differential, high set phase differential, restrained ground differential and overcurrent protection. TransCal is expertise in numerical relay testing .