V
Re
t
t
t-1
(o-U)
(u-U)
r-t
t-1
r-t
Umax
Umin
Under Voltage
Over Voltage
L1
,
L2
,
L3
Normal
Normal
Over an
n
d Un
n
der Voltage : (o-U),(u-U)
Under voltage (u-U) it can adjusted betw een Umin= (300 – 370 V).
Umax=(390 – 460 V).
If the voltage drops below the adjusted under voltage limit, w hen
u-U
show s
on the screen and device sw itch off its output contact end of
the t-1 time Normal LED turned on .In this case
u-U
w arn appears on
the screen.
If the voltage exceed the adjusted over voltage limit, Normal LED
turned off and output relay sw itch off. In this case
o-U
w arn
appers
on
its screen.
Hysteresis is 6 V.
I(A)
Re
t
t
Sdt
d-t
r-t
d-t
r-t
o-C
u-C
%hYS
%hYS
2.6 Asym m etric Curren
n
t Protection
n
:
It can be set by the user betw een 5% and 40%. It controls the
asymmetric that may occur in the current of the three phases. That
may occur w hen o
and the other one
is high. That may cause asymmetric current in the motor's bobbin.
This w ay the motor's bobbin is protected. Furthermore it protects the
motor from missing phase or a possible unplugged or cut w iring.
If the unbalance betw een the phases' current exceeds the adjusted
value the sw itch off occurs after t-1 delay.
If the current unbalance exceed the adjusted value, Normal LED
turned off and output relay sw itch off. In this case
ubC
w arn
appears on
its screen.
This function can be disable if
ubC
value = 000 (oFF)
Over an
n
d Un
n
der Curren
n
t : (o-C),(u-C)
When the current of the protected system goes below the adjusted
value it sw itches off its output contact after
d-t
delay.
Normal LED turn off and relay sw itch off its contact .In this case
u-C
w arn appears
on display.
When any current passing through any phase of the protected
system
exceeds the adjusted value the device sw itches off its output
contacts after a proper time (
d-t
).Normal LED turn off and relay
sw itch off its contact .In this case
o-C
w arn appears
on display.
NOTE:
Under current protection set value with its hysteresis must
not overlap with over current protection set value with its hysteresis
or, the under current protection set value must not be higher than the
over current protection set value.
VOC
OC
r-t
r-t
Re
t
t
t-2
(o-F)
(u-F)
r-t
t-2
r-t
55 Hz
45 Hz
Under Frequency
Over Frequency
L1
,
L2
,
L3
Normal
Normal
f (Hz)
Start delay tim e: Sd-t
It can be set betw een 1 and 60 seconds.It is used to prevent the
sw itch off from occurance because of the motor's inrush current.
This function can be disable if Sd-t value = 000 (oFF)
Return
n
Tim e : r-t
it show s the delay time that device w ill w ait to sw itch on its output
Very Over Curre
n
t Coefficie
n
t : VOC (
Current Very Sudden
Sw itch Off Protection)
,
When the current value exceeds the adjusted value w ithin the start
delay time
,
the device sw itches off
,
its output contact immediately.
Very Over Current value = (o – C) x (VOC)
This function can be disable if VOC = 000 (oFF)
Over Curren
n
t Coefficie
n
t : OC (
Current Sudden Sw itch Off
Protection)
,
delay time
,
the device sw itches off
,
its output contact immediately.
Over Current value = (o – C) x (OC)
This function can be disable if OC = 000 (oFF)
Over an
n
d/or Un
n
der Frequen
n
cy Protection
n
: ( 40 – 70 Hz )
Under Frequency be able to set betw een
(u-F)
= 40 Hz ...[(o-F) -0,4]
Over Frequency be able to set betw een
(o-F)
=[(u-F) + 0
,
4]...70 Hz
If required , it can be set only under frequency or only over
frequency protector only. (if system frequency above 55 Hz, under
screen displays
o-F
w arning and end of time t-2 relay sw itch off
its output contact )
if o-F = oFF and u-F = 45 Hz set , device w orks as under
frequency protector only . (if system frequency below 45 Hz
,
under screen displays
u-F
w arning and end of time
t-2
relay
sw itch off its out contact.)
if o-F = oFF and u-F = oFF set, frequency protection is disabled.
LOCKING FUNCTION :
It can be controlled by tw o parameters. Locking time and
Locking counter. If the number of opening reaches the
adjusted locking counter w ithing the adjusted locking time then
device sw itch off its contact and locks its functions until the
user pressed
Reset
button.
If the locking counter is adjusted to
oto
then this function is
disable and device never locks itself.
L-t : Locki
n
g Tim e
( 001 – 060 min. )
It is w ell know the frequently occurring faults may damage
system. For that the device w hen number of faults reaches the
adjusted locking number w ithin this locking time. This w ay the
system is protected and user has chance to investigate the
problem.
n
g
n
(
,
)
The number of faults allow ed w ithin the period L-t. If number of
faults exceeds this adjusted counter value device locks itself.
In this case (
- - -
) w arn
appears on
its screen. User must
press Reset button then the fault passes in order to unlock the
device.
V
Re
t
t
(o-U)
(u-U)
r-t
Over Voltage
1. Error
L1
,
L2
,
L3
Normal
Normal
L- C (number of lock)
= 2 piece
L- t (lock time)
= 3 min.
if select ;
t-1
t-1
r-t
Pus hed to Reset button
and Lock have reseted.
Locked occurred
< 3 minutes
Over Voltage
2. Error
w w w . e k t
2
. c o m
Electronics
Katrangi
Trading
ne of the phases' voltage is low
Over voltage (o-U) it can adjusted betw een
If o-F = 55 Hz and u-F = oFF set, device w orks as over
frequency protection as w ell as both of protection can be disabled.
Under Current (u-C)
Over Current (o-C)
relay w hen failure ends after a sw itch off. It can be set betw een 0,5
and 99,9 seconds.
It can be set by the user betw een 2 1 and 6.
It can be set by the user betw een 1 1 and 2.
When the current value exceeds the adjusted value w ithout th start
e
p p ty
If
L- C
is set to
oto
then this ro er is disabled.
L-C : Locking Counter
oto 001 – 010 iece
p
