General Informations
The device can be used in electrical panels, laboratories and test devices. With
the assistance of a current transformer, it measures the AC current passing
through the system in terms of Amper unite. When the current exceeds the
adjusted over current or goes below the adjusted under current values the
device starts to count for the adjusted delay time and after that it changes
Re1 or Re2 outputs contact possition. After energizing the device, “dA -c “
message appears on it's screen for 2 seconds and then it starts to show the
current value.
■ The current transformer ratio can be adjusted between 5/5 and 10000/5 using
the touch buttons on the front panel of the device.
■ Stores the maximum demand value and the peak value on its memory and
keeps these values even if the energy supply goes off.
■ When the measured value of the seconder current reaches 5,1 A, “ OvEr”
message starts to flash on the screen to warn the user that the value of the
current exceeded the limit values
Fast Buttons:
While in measurement screen, pressing up button shows the peak value
Pressing down button shows the maximum demand value
Main Menu :
Pressing on the set button leads to the main menu. The menu contains
o-OP
,
u-OP
,
CLr
,
SEt
and
quIt
in order.
► OP :
Shows the opening counter “ that occures when the adjusted over
current values being exceeded
► CLr :
Peak and maximum demand values can be cleared in this menu.
To enter this menu, set button must be pressed.
cALL
,
c-OP
,
c-dp
and
quIt
submenus are included within this menu.
► cALL :
It is used to clear all peak, maximum demand and opening
counter values by pressing the set button.
► c-OP :
It is used only to clear the opening counter value.
► c-dp :
It is used only to clear the peak and the maximum
demand values.
► quIt :
To exit the submenus and return back to the main menu.
► Set :
The menu that parameters can be adjusted in. to enter this menu set
button must be pressed.
CtrF
,
o-SP
,
u-SP, hYS
,
od-t
,
ud-t
,
Sd-t
,
r-t
,
dd-t
,
o-CO
,
u-CO
,
LtCh
,
tP
, and
quıt
submenus are included
within this menu. These parameters will flash on the screen. In
order to change any of them set button must be pressed, then the
screen will stop flashing and using the direction buttons the new
value can be applied. Pressing the set button again would store this
value.
► ctrF :
Current transformer ratio.
It can be set between 5 and
10000. In order to set the value, set button must be pressed then
using the direction button the aimed value can be set. Pressing set
again would store the new value.
► o-SP :
Over current value set menu.
It can be set between the
maximum current allowed for the current transformer and %10 of
the that value. For example for 500/5A transformer, it can be set
between 50 and 500A.
► u-SP :
Under current value set menu.
It can be set between
the maximum current allowed for the current transformer and %10
of the that value.
► hYS :
The percentage Hysteresis value.
It can be adjusted
between 0,03 and 0,50. When the current exceeds the adjusted
over current value then an opening occures. Inorder to close the
output contact again, the current must go below the adjusted over
current value multiplied by the %hYS, otherwise it will keep the
output open.
► od-t :
Delay time for over current alarm.
It can be adjusted
between 1 and 30 seconds. The opening of current exceeding
adjusted current limit occures after this delay.
► ud-t :
Delay time for under current alarm.
It can be adjusted
between 1 and 30 seconds. The opening of current exceeding
I(A)
Re
Over
Re
Over
Re
Under
Re
Under
o-CO =0000
u-CO =0000
o-CO=0001
u-CO =0001
Sd-t
od-t
r-t
ud-t
r-t
o-SP
u-SP
%hYS
%hYS
Technical Data
Operational Voltage (Un)
: 230Vac
Operating range
: (0,8-1,1) x Un
Frequency
: 50/60 Hz
Power Consumption
: < 4VA
Measurement Sensitivity
: %1 +1 digit
Current Transformer Ratio
: 5/5..........10000/5 A
Display
: 4 Digits Led Display
Contact Current
: Max. 3A / 240Vac
Protection Class
: IP 20
Terminal Protection Class
: IP 00
Operating Temperature
: - 5 °C .... + 50 °C
Operating Humidity
: %15 ...... %95
(without condensation)
Installation
: to the panel tap
Dimentions
: 72x72x80 mm
DAM – C -
72
®
DIGITAL UNIVERSAL AMPERMETER (True RMS)
► With Demand
► Over & Under Current Adjustment
adjusted current limit occures after this delay.
► Sd-t :
Start delay time.
It can be set btween 0 and 60 seconds. It is
used to prevent any unwanted opening while current is starting from
0 “ especially for motors that need high current for start up”.
In this period opening wouldn't occure even if the current exceeds
the adjusted over current value. If this value is set to “0000” the
device will wait for the delay time d-t and then opens its output.
► r-t :
Return time.
The time required to turn back from an alarm
situation. The device waits for that period after the current returns
below the adjusted value. It can be set between 2 and 10 seconds.
► dd-t :
Demand time.
The tıme interval in which the demand
value is calculated. It can be adjusted between 10 to 60
minutes
► o-CO :
The menu to adjust the over current output contact possition.
■ if the value is set to 0000 then the output in normal situation is
closed contact and in over current alarm situation is open contact.
■ if the value is set to 0001 then the output in normal situation is
open contact and in over current alarm situation is closed contact.
► u-CO :
The menu to adjust the under current output contact
possition.
■ if the value is set to 0000 then the output in normal situation is
closed contact and in under current alarm situation is open contact.
■ if the value is set to 0001 then the output in normal situation is
open contact and in over current alarm situation is closed contact.
► LtCh :
Latch function.
The place to choose wether the device will
go out of an alarm manually or automatically
■ if the value is set to 0000 then the latch function is off and the
device will go out of the alarm automatically
■ if the value is set to 0001 then the latch function is on and the
device wouldn't go out of the alarm unless the user presses the set
button until the alarm led turns off. If pressed, then device then will
go out of the alarm after the delay time r-t.
► tP :
Sudden opening function. If the current goes over %150 of the
adjusted over current value the the device will open its output
without any delay.
■ if 0000 then the function is disabled .
■ if 0001 then the function is enabled. ( not active while start delay
time (Sd-t)).
► quıt :
Pressing set leads to the main menu.
► quıt :
Pressing set leads to the measurement screen.
Button Functions :
To enter the menu set button must be pressed. Within the menu, the
parameters can e reached using the direction buttons. To inter the desired
menu set button must be pushed again. This parameters can be adjusted
using the direction buttons, pressing the set button again stores the new
parameters.
