Basler-electric BE1-11g Uživatelský manuál stáhnout pdf (Strana 597)

100

101

9424200994 Rev N 585

The K factor gives the time that a generator can withstand 1 per unit negative sequence current. For

example, with a K factor of 20, since (I

)

becomes 1 at 1 per unit of current, the generator can withstand

the condition for 20 seconds. Typical values for generator K factors are in the 2 to 40 range. The BE1-11g

uses the “nominal current” setting of the BE1-11g to determine what corresponds to 1 per unit current in

the generator.

When curve 46 is selected, the BE1-11g changes the range of the allowed time dial to 1 to 99 (instead of

the time dial range of 0.1 to 9.9 for all the other curves). The user should enter the “K” factor of the

generator into the time dial field.

BE1-11g Equation

When the 46 function is used, the BE1-11g uses the K factor (i.e., 46 time dial setting), 46 minimum

pickup setting and generator full-load current to create a constant Z (see Equation 30

 = 46   



 

46  





Equation 30

The time to trip equation used in the BE1-11g is:











+ 0.028 

Equation 31

where:

 =

 



46  

Equation 32

which, when M > 1, reduces to:





= 46  



 











Equation 33

BE1-11g Time Curve Characteristics

1 2 ... 592 593 594 595 596 597 598 599 600 601 602 ... 671 672

Basler-electric BE1-11g Uživatelský manuál Strana 597

Komentáře k této Příručce

Basler-electric BE1-11g Uživatelský manuál Strana 597

Komentáře k této Příručce

Související produkty a manuály pro Relé Basler-electric BE1-11g