CHINT NA1-1000, Catalogue

Page: 47 / 64

. 4 0 .
Over-current protection characteristic curve figure
10000
5000
2000
1000
500
200
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
.2 .3 .4 .5 .6 .8 1 2 3 4 5 6 8 10 20 30
xIn
40 50 60 70 80 100
kA
t(a)
Ir2=(1.0～15)Ir1
Ir1=(0.4～1)In
Tr=(15 480)s
~
0.4s
0.3s
0.2s
0.1s
Ir3=1.0In～50kA/75kA/100kA
2
I t
OFF
e.Characteristic
Overload long time-delay protection
±
10%
≤
1.05Ir1
＞
1.30Ir1
1.51Ir1(setting time)
2.0Ir1
~ (0.4 1)In
Current Ratings
Range(lr1)
Error Current Action Time Time Error
＜
2h Non-trip
＜
1h trip
15
8.4
30
16.9
60
33.7
120
67.5
±
10%
±
10%
240
135
480
270
100% or 50% (Applicable to 3P+N or 4P)
Phase N Overload and Over-Current Characteristic
±
10%
≤
0.9Ir2
＞
1.10Ir2
Time setting (ts)
Returnable Time
Current Ratings
Range(lr2)
Error Current Action Time Time Error
0.1
0.06
0.2
014
0.3
0.23
0.4
0.35
±
15%
±
15%
Short-circuit short-delay protection
(1~15)lr1
+OFF (OFF Position)
Non-trip
Delayed-trip
. 4 1 .
Air Circuit Breaker
b.Operating power supply
The operating power supply input to the intelligent controller: AC 400V/380V, 230V/220V, AC 110V, 50Hz; DC220V, 110V, 24V.
Step 1: Setting right confirmation. The key must be switched to
“
setting
”
position for type H. This step is no necessary for type M.
Step 2: Make sure the controller is under reset status. If the controller isn't under reset status, press
“
reset
”
key till the ammeter displays
operation current.
Note: When the controller is under malfunction alarm status, then the setup function is locked and the setup operation can't be conducted.
Step 3: Press
“
set
”
key till the ammeter display window displays required action current or time setting.
Step 4: Press
“
+
”
and
“
-
”
to set the items to be changed.
Step 5: Press
“
save
”
key. At that time, the
“
save
”
indicator will flash once to indicate that the parameters are saved. If not desiring to save,
then directly press
“
reset
”
key. Then the parameters won't be changed and will remain the original values.
Step 6: Repeat step 3 ~ step 5 in case requiring changing other parameters. If not, press
“
reset
”
key till the characteristic curve indicator is off.
Note: In case of occurrence of malfunction under setup status, it will automatically exit the setup status and enter into malfunction status.
During the adjustment of the parameters, the longer the time of pressing or holding the
“
+
”
or
“
-
”
key is, the faster the up or down speed is.
Failure inquiry operation
Query operation method
Step 1: Make sure the controller is under reset status.
Step 2: Press
“
fault display
”
key till the ammeter display window indicates the failure action value and the action time alternately. Press
“
select
”
to inquiry relevant parameters.
Step 3: Press
“
reset
”
key to exit the inquiry status.
Test operation method
Step 1: Make sure the controller is under reset status.
Step 2: Press
“
set
”
key till the indicator of the short time-delay characteristic curve current is on. Press
“
+
”“
-
”
to adjust the required current.
Press
“
trip
”
key, then the breaker will trip. The ammeter display window will display the action current and action time in turn.
Step 3: Press
“
reset
”
key to exit the test status.
c.Basic functions of intelligent controller
Main protection function
Query function
Parameter setting function
Test function
Load monitor function (optional)
Making current release (MCR) and override tripping function (Optional)
Signal alarm function (optional)
d.Operation instructions
Parameter setting operation
a.Symbol designation table
Number
1
2
3
4
5
6
7
8
9
Symbol
Inm
In
I
L
(Ir1),Is(Ir2),Ii(Ir3)
I
G
(Ir4)
t
L
,t
s
,t
G
L1,L2,L3,G
Ic1,Ic2
T,I
A,kA,s
Designation
Frame size rated current of breaker
Rated current
Action current of long time-delay, short time-delay and instantaneous
Action current of earth fault or phase N
Action time of long time-delay, short time-delay and grounding
Phase A, B, C and N (or earth)
Action current of load monitor 1 and load monitor 2
Time, current
Unit Indicator: Ampere, kilo-Ampere, second