DAKR-01D
UNDER CURRENT CONTROL RELAY
General
Under current protection relays are designed to prevent loads
from being damaged due to under current.
Usage and Working Principle of the Device
Make the connection of the device in accordance with the
connection type. After making the connections, energize the device.
Make the device settings according to the minimum operating
current of the load you will use. You can set the under current
setting with the "<A" knob, the starting time (inrush time) value with
the "ST" knob, and the error waiting time with the "DT" knob.
When the device is energized, the relay is energized, the contact
output switches to terminal 3 and the OUT led turns on. When the
start button is pressed, the contactor is energized, when the current
starts to be drawn from the system, the device starts to count the
start (inrush) time. At the end of the inrush period, if the drawn
current is lower than the set under current (<A) value, the <A led
turns on and the device counts as long as the error waiting time,
OUT led turns off, then the device de-energize the relay and the
contactor is de-energized. To re-energize the contactor, the start
button must be pressed again.
When the contactor is energized, the contactor is de-energized by
pressing the Stop button when it is desired to be de-energized.
In order to protect the device in the system from overcurrent, it is
recommended to connect an overcurrent (thermal) relay to the circuit.
Settings on the Device
ST knob: Sets the start (inrush current) time.
DT knob: Sets the undercurrent fault waiting time.
<A knob: Sets the under current set value.
Current Transformer Selection
The current transformer to be used must be selected in
accordance with the system. Using a current transformer with a
value too higher than the current drawn from the system may
cause the device to measure incorrectly.
Example: If the under current value to be adjusted is 5A and
the current transformer used is 150/5A, the device will not be
able to measure properly. For this reason, the current
transformer to be used should be at most 25 times more than
the under current value desired to be adjusted. In this case, the
current transformer that should be used for a load with a under
current value of 5A is at most 125/5A.
Setting Under Current Set Value
Setting the under current value should be done according to
the formula below.
Under Current Set Value =
(Under Current Value of Load / Current Transformer Value) * 5
Example: If the under current value to be adjusted is 100A and
the current transformer value used is 250/5A, the under current set
value will be set as 100A when <A button is taken to the 2 stage.
Under Current Set Value = (100/250)*5 = 2
Device Maintenance
Switch off the device and release from connections. Clean the
trunk of device with a swab. Don’t use any conductor or chemical
might damage the device. Make sure device works after cleaning.
Warning
• Please use the device according to the manual.
• Don’t use the device in wet.
• Include a switch and circuit breaker in the assembly.
• Put the switch and circuit breaker nearby the device, operator can reach easily.
• Mark the switch and circuit breaker as releasing connection for device.
l
k
L 2 1N 3
l k
Load
C1
T1
Start
Button
Stop
Button
2A
N
L1
L2
L3
C1
97
98
Dimensions
35,6mm
6,35mm
90mm
94,6mm
34,5mm
49,25mm
57,75mm
45mm
65,8mm
35mm
19 mm
(Cabling
Distance)
Technical Specifications
Operating Voltage 150-260V AC 50/60Hz.
:
Input (k-l) :X/5A Current Transformer
Start Time (Inrush) :1 sec. - 10 sec.
Delay Time (Waiting) :0,5 sec. - 2,5 sec.
Operating Power :<6VA
Operating Temp. :-20°C.....+55°C
Display :3x LEDs
Connection Type
Mounting
:
:
Terminal connection.
Assembled on the din rail.
Weight :0,210 kg.
Contact :5A 250VAC Resistive Load
Operating Altitude :<2000m
Cable Diameter :2,5mm²
Current Set. Range 0.5A - 5A AC
:
Contact:
www.tense.com.tr MADE IN TURKEY
Document No: DK-102-1
Connection Diagram
