DP02-72
Under Voltage Protection
Over Frequency
Protection
Under Frequency
Protection
TRUE RMS
Latch Function
Voltage (V)
Current (A)
Frequency (Hz)
Over Voltage Protection
Under Current Protection
Over Current Protection
Volt
V
Hz
Hz
V
Hz
Display Functions
18 16
15
Digital Protector
One phase
Voltage – Current
and
Frequency control
General:
In one phase systems, it measures RMS values of AC voltage,
current and system frequency sensitively.
DP02-72 has many features.
Those are;
- Over Voltage Protection
(o - U)
- Under Voltage Protection
(u - U)
- Over Current Protection
(o - C)
- Under Current Protection
(u - C)
- Over Frequency Protection
(o - F)
- Under Frequency Protection
(u - F)
When device is turn on if its adjusted voltage and frequency in its
interval relay switch on.
If any of error occurred at the end of adjusted time relay switch off
its contact. When system return normal values, at the end of time
out relay switch on.
IMPORTANT:
L - N is device supply inputs.
Thus,the applied L – N voltage must be
rated voltage of system . Otherwise normal
led makes flash and the device switched off
its output contact.
The measured frequency also must the
frequency of the system.
Special Buttons:
Select:
(Up direction)
when pressing continuously,
screen displays frequency of
system. When button release
device continue to show voltage.
Reset:
If error case although disappeared
then device is not return to normal,
latch-function occurred and it
makes locked device.
Or Lock-function (only for currents)
may be occured.
After checking error in system then
restart device with pushing reset
button.
V
Re
t
t
t-1
(o-U)
(u-U)
r-t
t-1
r-t
Umax
Umin
Under Voltage
Over Voltage
VL
Normal
Normal
Over and Under Voltage : (o-U),(u-U)
Under voltage (u-U) it can adjusted between Umin= (180 – 225 V).
Over voltage (o-U) it can adjusted between Umax=(235 –275 V).
If the voltage drops below the adjusted under voltage limit, when
u-U
shows
on the screen and device switch off its output contact end of the
t-1 time Normal LED turned on .In this case
u-U
warn appears on the
screen.
If the voltage exceed the adjusted over voltage limit, Normal LED
turned off and output relay switch off. In this case
o-U
warn
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
Over and Under Current : (o-C),(u-C)
Under Current (u-C)
Over Current (o-C)
When the current of the protected system goes below the adjusted
value it switches off its output contact after
d-t
delay.
Normal LED turn off and relay switch off its contact .In this case
u-C
warn appears
on display.
When current passing through phase of the protected system
exceeds the adjusted value the device switches off its output contacts
after a proper time (
d-t
).Normal LED turn off and relay switch off its
contact .In this case
o-C
warn 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
Start delay time: Sd-t
It can be set between 1 and 60 seconds.It is used to prevent the switch
off from occurance because of the motor's inrush current.
This function can be disable if Sd-t value = 000 (oFF)
Return Time : r-t
it shows the delay time that device will wait to switch on its output relay
when failure ends after a switch off. It can be set between 0,5 and 99,9
seconds.
Very Over Current Coefficient : VOC (
Current Very Sudden Switch
Off Protection)
It can be set by the user between 2,1 and 6.
When the current value exceeds the adjusted value within the start
delay time, the device switches off, its output contact immediately.
Very Over Current value = (o – C) x (VOC)
This function can be disable if VOC = 000 (oFF)
Over Current Coefficient : OC (
Current Sudden Switch Off Protection)
It can be set by the user between 1,1 and 2.
When the current value exceeds the adjusted value without the start
delay time, the device switches off, its output contact immediately.
Over Current value = (o – C) x (OC)
This function can be disable if OC = 000 (oFF)
