DTMR3-TX
Doc. N°
MO-0377-ING
Copyright 2010
Data
01.04.2009
Rev.
0
Pag.
29
of
87
14.7 - Function:
HLock
(2
nd
– 5
th
HarmonicLock)
Oper. Levels
2H
0.100
Pu
(0.10
0.50)
step 0.01
Pu
5H
0.200
Pu
(0.10
0.50)
step
0.01
Pu
R2H
0.500
Pu
(0.10
1.00)
step
0.01
Pu
R5H
0.500
Pu
(0.10
1.00)
step
0.01
Pu
Timers
t2H
0.05
s
(0.01
90)
step
0.01
s
t5H
0.05
s
(0.01
90)
step
0.01
s
14.7.1 - Description of variables
2H
: Second harmonic level p.u. of measured differential current
5H
: Fifth harmonic level p.u. of measured differential current
R2H
: Reduced second harmonic lock level during time [t2H] from transformer
R5H
: Reduced second harmonic lock level during time [t5H] from transformer
t2H
: Time during which 2
nd
harmonic level lock reduction is active
t5H
: Time during which 5
th
harmonic level lock reduction is active