Thytronic XMR-T - Negative Sequence Overcurrent for Line;Transformer Protection- 46 LT; Thermometric Probes - 26; Undercurrent - 37 (H, L, T); Undervoltage - 27

TECHNICAL DATA
21
± 5 mHz on frequency measures
Operate time accuracy 5% ± 10 ms
— Thermometric probes - 26
5
Alarm ThAL1...8:
Alarm threshold (Th
AL1...8
) 0...200 °C
Operate time (tTh
AL1...8
) 0....100 s
Trip Th>1...8:
Trip threshold (Th>
1...8
) 0...200 °C
Operate time (tTh>
1...8
) 0....100 s
— Undervoltage - 27
Common configuration:
Voltage measurement type (Utype27)
6
U
ph-ph
/U
ph-n
Operating logic (Logic27) AND/OR
U< Element
Curve type (U<
Curve
) DEFINITE/INVERSE
7
Definite time
First threshold definite time (
U <
def
) 0.05...1.10 U
n
/E
n
(step 0.01 U
n
/E
n
)
Operating time (t
U
<
def
) 0.03...100.0 s
0.03...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Inverse time
First threshold inverse time (
U <
inv
) 0.05...1.10 U
n
/E
n
(step 0.01 U
n
/E
n
)
Operating time (t
U
<
inv
) 0.10...100.0 s
0.10...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
U<< Element
Definite time
Second threshold definite time (
U <<
def
) 0.05...1.10 U
n
/E
n
(step 0.01 U
n
/E
n
)
Operating time (t
U
<<
def
) 0.03...100.0 s
0.03...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup time ≤ 0.04 s
Dropout ratio 1.03...1.05
Dropout time ≤ 0.05 s
Overshoot time 0.04 s
Pickup accuracy ± 0.5% with 0.1U
n
/E
n
± 0.2% with 1U
n
/E
n
Operate time accuracy 5% ± 10 ms
— Undercurrent - 37 (H, L, T)
Operating logic (Logic37) AND/OR
Definite time
First threshold definite time (I<
def
) 0.10...1.00 I
n
(step 0.01 I
n
)
Operating time (t<
def
) 0.04...200 s
0.04...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
Pickup time ≤ 0.04 s
Dropout ratio 1.03...1.05
Dropout time ≤ 0.05 s
Overshoot time 0.04 s
Pickup accuracy ± 0.5% with 0.1I
n
,
± 0.2% with 1I
n
Operate time accuracy 5% ± 10 ms
— Negative sequence overcurrent for Line/Transformer protection- 46LT
I
2
> Element
Curve type (I
2
>
Curve
) DEFINITE,
IEC/BS A, B, C, ANSI/IEEE MI, VI, EI,
I
2
t, EM
CLP mode (I
2CLP
> Mode) OFF/ON-Element blocking/ON-Change setting
CLP activation time (t
2CLP>
) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
Nota 5 Optional function
Note 6 With U
ph-ph
setting all thresholds are in p.u. U
n
With U
ph-n
setting all thresholds are in p.u E
n
Note 7 The mathematical formula for INVERSE curve is: t= (0.75 ∙ t
U
<
inv
) / [1 - (U/U<
inv
)]
t : operating time (in seconds)
t
U
<
inv
: operating time setting (referred to U/U<
inv
= 0.25 )
U : input voltage
U<
inv
: threshold setting
XMR-T EQUIPMENT MANUAL
Ed. 2.9 - 02/2021