Cart 0
  • Home /
  • Transformer Differential Protection
Leybold
  1. Physics
  2. Chemistry
  3. Biology
  4. Technology

Transformer Differential Protection

LD 7453311
Transformer Differential Protection
Transformer Differential Protection
Transformer Differential Protection

Description

Industrial protection relay for monitoring the transformer (745 50) according to the protection principle of differential protection. The relay measures input and output currents of the transformer via an internal matching current transformer and trips in case of short circuits between windings and windings as well as in case of earth faults. The operating status and tripping are indicated by means of a display. In addition, the relay detects operating states outside the protection range, which must not lead to the transformer being switched off. In addition to the differential protection, the device offers various communication and reserve protection functions. 

USB connection on the front for "Smart View SE" (included in delivery). 

Programming and parameterization is done with the "Smart View SE" software. 

Technical data

  • Protection functions     (ANSI )  7453311   
  • Phase current prot. (non-directional)   (50/51)   4  
  • Generator or Transformer differential protection   (87G/87T)   Yes 
  • Restricted earth fault protection  87N (64REF)   2 
  • Earth current elements (non-directional)   (50N/51N)   4 
  • Negative sequence current prot. (DEFT/INV)   (46)   2 
  • Overload protection with thermal replica   (49)   Yes 
  • Inrush detection (2nd harmonic)   ()   Yes 
  • Current transformer supervision   (60L)   Yes 
  • Load blinder  - ()Yes 
  • Circuit breaker failure protection   (50BF/62BF)   Yes 
  • Trip circuit supervision   (74TC)   Yes 
  • Lockout function (  86)   Yes 
  • Protection parameter sets    () 4 
  • Reverse interlocking ()    Yes 
  • Event, failure and disturbance recorder    () Yes 

  Measuring functions   

  • Currents ()   Yes   
  • Thermal overload θ    () Yes   
  • Trend recording ()    Yes   
  • Statistic measuring functions (min, max and avg values)     
  • Currents ()    Yes   
  • Thermal overload θ ()   Yes 

 

  • Rated current: 1 A, 5 A 
  • Rated frequency: 50...60 Hz   
  • Auxiliary voltage: 48...230 V AC or 24...270 V DC   
  • Output contact: 2 x CO 
  • Digital in: 5   
Print page
Physics
Chemistry
Biology
Technology

Contact Us

Technical Service & Support:

Online Service Portal
Do you have any questions or suggestions regarding our devices, products, experiments, equipment sets or about our software? You need spare parts? FORM

Repair Service
You would like to register a repair? FORM

Europe
For European distributors, please visit: European distributors
Worldwide requests
Please contact us per email: sales@ld-didactic.de

 Click here for our contact form and postal address.

Contact Us

LD Didactic Leybold Shop Feedback Instruments ELWE Technik