Delixi CDW3 Series, Руководство пользователя

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36
Short circuit instantaneous protection characteristics
Action threshold of short circuit instantaneous protection
<0.85Ii：No action
>1.15Ii：action
I
R
Current setting range：2In，3In，4In，6In，8In，10In，12In，15In+OFF，
Note： Allowable error of action time≤50ms
Earth fault protection characteristics
Action threshold of earth fault protection
<0.9Ig：No action
>1.1Ig：action
≥1.1Ig：Delay action
Current
setting
A B C D E F G H OFF
In<1250 0.2In 0.3In 0.4In 0.5In 0.6In 0.8In 0.9In In
In≥1250 500A 600A 700A 800A 900A 1000A 1100A 1200A
current
Action time
tg（s）
Inverse time
limit
Action
characteristics
t=
( )
╳
𝑡𝑔
Setting time s
0.1 0.2 0.3 0.4
Timing limit,
minimum time
is return time
Setting time s
0.1 0.2 0.3 0.4
Minimum s
0.08 0.14 0.23 0.35
Maximum s
0.14 0.2 0.32 0.5
Note： I
J
：
Setting value of grounding protection，When In≥1250A，I
J
=1200A; When
In<1250A，I
J
=In；When I≥I
J
，fixed time limit；When Ig＜I＜I
J
，inverse time
limit.
I： Fault current value
t： Fault action delay time
tg： Setting value of inverse time limit of grounding
Allowable error of inverse time limit action time±20%
(off of time period means I
2
t off, i.e. inverse time limit is closed, which is fixed time limit;
use off of current gear to close short time delay protection function)
Factory setting value of intelligent controller
Trip
curve I
2 t
Long time delay Short time delay
instanta
neous
Earth fault
Thermal
memor
y
I
R
t
R
Isd ts Ii Ig tg
1In 30s 6In 0.2s 10In
Gear G
(4P, 3P +
n)
Off (3P)
0.4s 20min
Note: the grounding fault protection of 3p product is in off state (off gear) from the factory, which
can be adjusted by the user according to the actual situation.
Note: refer to the website for instructions of iTR326 series Electronic trip unit（ www.delixi-
electric.com )
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Debugging CDW3