Seg XRN2, Manual

22

TB XRN2  02.00 E

6

Special settings

6.1

Adjustable parameters

The following parameters can be set by the user him-
self:

XRN2-1 and XRN2-2:

∆

/Y 

-

changing of input transformer connection

U< 

-

threshold for undervoltage

t

U

< 

-

tripping delay for undervoltage

U<< 

-

threshold for undervoltage

t

U

<< 

-

tripping delay for undervoltage

U> 

-

threshold for overvoltage

t

U

> 

-

tripping delay for overvoltage

U>> 

-

threshold for overvoltage

t

U

>> 

-

tripping delay for overvoltage

f

N

-

rated frequency

T

-

frequency measuring repetition in periods

f

1

-

threshold for frequency element 1

t

f1

-

tripping delay for frequency element 1

f

2

-

threshold for frequency element 2

t

f2

-

tripping delay for frequency element 2

f

3

-

threshold for frequency element 3

t

f3

-

tripping delay for frequency element 3

U

B

<

-

voltage theshold value for frequency and 
vector surge measuring (or df/dt)

RS

-

Slave address of the serial interface

XRN2-2 

only:

df

-

threshold for rate of frequency (df/dt) in 
Hz/s

dt

-

measuring repetition for df/dt in periods

XRN2-1 

only:

1/3

-

Vector surge tripping 1-of-3/3-of-3

∆Θ

-

Pickup value for vector surge in degree

6.2

Setting procedure

In this paragraph the settings for all relay parameters
are described in detail. For parameter setting a pass-
word has to be entered first (please refer to 5.4).

6.2.1

Parameter setting of over- and
undervoltage supervision

The setting procedure is guided by two coloured LEDs.
During setting of the voltage thresholds the LEDs U<,
U<<, U> and U>> are light green. During setting of
the trip delays t

U>

, t

U>>

, t

U<

 and t

U<<

 the according LEDs

light up red.

Thresholds of the voltage supervision

During setting of the threshold U>, U>>, U< and U<<
the displays shows the value directly in volt. The thresh-
olds can be changed by the <+> <-> push buttons and
stored with <ENTER>.

The undervoltage supervision (U< and U<<) as well as
the overvoltage supervision (U> and U>>) can be de-
activated by setting the threshold to "EXIT".

Tripping delay of voltage supervision

During setting of the tripping delays t

U<

, t

U<<

, t

U>

 and t

U>>

the display shows the value directly in seconds. The
tripping delay is changed via the push button <+> and
<-> in the range of 0,04 s to 50 s and can be stored
with the push button <ENTER>.
When setting the tripping delay to "EXIT" the value is in-
finit meaning only warning, no tripping.