Thytronic NG10 User Manual

FUNCTION CHARACTERISTICS
78
NG10 - Manual - 04 - 2022
Setting example
In reference to the above shown schematic diagram, the logic selectivity is performed by means of
the dedicated I/O for the short circuit elements of A, B and C protective relays, so that if a fault arises
in (2), the open order or circuit breaker CB2 is issued and no trip is issued by A device.
A command must be issued for the main circuit breaker CB1 by the A relay with a fault in (1).
A Protection
I>> element with definite time set to 4.5 I
n
with operate time to 0.10 s blocked by start of B and/or C
protection.
Settings:
• I>>
def
= 4.5 I
n
• t >>
def
= 0.100 s
• PulseBLOUT1 = OFF
• PulseBLIN1 = 1 s
• I>>BLK2IN = ON
• I>>BLK2OUT = OFF
• t
B-IPh
= 0.30 s
B Protection
I>> element with definite time set to 4.0 I
n
with operate time to 0.10 s with emission of block output
toward A protection relay.
Settings:
• I>>
def
= 4.0 I
n
• t >>
def
= 0.100 s
• I>>BLK2IN = OFF
• I>>BLK2OUT = ON
• PulseBLIN1 = OFF
• PulseBLOUT1 = 1 s
• t
F-IPh
= 0.25 s
C Protection
I>> element with definite time set to 4.0 I
n
with operate time to 0.10 s with emission of block output
toward A device and block input from D protection relay.
Settings:
• I>>
def
= 4.0 I
n
• t >>
def
= 0.100 s
• I>>BLK2IN = ON
• I>>BLK2OUT = ON
• PulseBLIN1 = 1 s
• PulseBLOUT1 = OFF
• t
F-IPh
= 0.25 s
• t
B-IPh
= 0.30 s
•
LOAD
Pro_N
Pro_N
Pro_N
Pro_N
logica_acc-esempio.ai
Logic selectivity
BLIN1
BLOUT1 BLOUT1
BLOUT1
BLIN1
BLIN1
TRIP
TRIP
TRIP
Logic selectivity 2nd level Logic selectivity 1st level
TRIP
1
2
B
C D
A

Thytronic NG10 Specifications

General

Brand	Thytronic
Model	NG10
Category	Protection Device
Language	English