Thytronic NG10 - Low Impedance Restricted Ground Fault - 64 REF: Diagrams and Characteristics

FUNCTION CHARACTERISTICS
58
NG10 - Manual - 04 - 2022
NO TRIPPING
TRIPPING
0
1
2
3
4
5
6
7
8
9
10
I
ES(H)
/I
REF
>
I
E
/I
REF
>
10.5 21.5 32.5 43.5 54.5
Schema funzionale della protezione di terra ristretta a bassa impedenza (64REF)
&
Enable (ON≡ Enable)
64REF-BLK1
Block1
Block1
RESET
t
REF
>
0T
t
REF
>
Start 64REF>
Trip 64REF>
ON≡ Enable
&
64REF-ST-K
64REF-ST-L
64REF-TR-K
64REF-TR-L
TRIPPING MATRIX (LED+RELAYS)
64REF-Enable
Start 64REF>
I
REF
>
I
ES(H)
≤ 4 I
REF
>
I
E ≥
I
ES(H)
+ [I
REF
>/[1-(I
ES(H)
/4 · I
REF
>)
20
]
I
E
I
ES(H)
&
Start 64REF>
Trip 64REF>
BLK1 64REF>
&
&
Start 64REF>
&
Block2 output
(ON≡ Enable)
64REF>BLK2OUT
Block2out diagram
Pilot wire output
BLOUT1
TRIPPING MATRIX (LED+RELAYS)
ModeBLOUT1
A
B
C
D
≥ 1
t
F-IPh
t
F-IPh/IE
t
F-IE
ST-Iph BLK2
ST-IE BLK2
T 0
t
F-IPh/IE
T 0
t
F-IPh
T 0
t
F-IE
BLK2OUT-Iph
BLK2OUT-Iph/IE
BLK2OUT-IE
A = OFF
B = ON IPh
C = ON IPh/IE
D = ON IE
BLK2OUT-IPh-K
BLK2OUT-IPh-L
BLK2OUT-IPh/IE-K
BLK2OUT-IPh/IE-L
BLK2OUT-IE-K
BLK2OUT-IE-L
87G-M-L Block2 OUT
≥ 1
Start 87G-M-L
Block2 output
(ON≡ Enable)
87G-M-LBLK2OUT
I
E
>> Block2 OUT
I
E
>>> Block2 OUT
64REF(H)> Block2 OUT
I
E
> Block2 OUT