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Entes AKC-03A current monitoring relay AKC-03A AKC-03A Data Sheet

Product codes
AKC-03A
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General
AKC-01A /AKC-03A Over Current Monitoring Devices are designed to protect
motors and systems against over current with a current adjustment and two
delay adjustments (start-up and tripping). Start-up delay is developed in
order to prevent false contact turn-off arising from initial motor start-up
(demurrage) currents.
Operation Principles
AKC-01A device measures the current of motor or protected systems and
are utilized to turn-off the motor or protected systems when measured current
is above the adjusted level.
When the current value is lower than 
Iset value, the output relay is  switched
on. When the current value becomes higher than 
Iset value, the output relay
is switched off after an adjustable tripping delay time and the motor or
protected system is turned off.
Please see following figures.
For circumstances that the current value becomes higher than 
Iset value,
start-up delay (adjustable: 1-6 sec. ) is developed in order to prevent false
contact turn-off arising from initial motor start-up currents.
OVER / UNDER CURRENT MONITORING DEVICES
AKC SERIES
AKC-01A / AKC-03A OVER CURRENT MONITORING DEVICE
Dimensions
A2842/Rev.4
TYPE PK25
35 mm
90 mm
45 mm
62 mm
58 mm
32 mm
48 mm
35 mm
WARNING: If CT-25 current transformer has more than 1 turn,
isolated cable must be used.
CT-25 current transformer is selling with the device.
AKC-01D / AKC-03D UNDER CURRENT MONITORING DEVICE
General
AKC-01D / AKC-03D Under Current Monitoring Devices are designed to
protect motors and systems against under current with a current adjustment
and two delay adjustments (start-up and tripping). Start-up delay is developed
in order to prevent false contact turn-off arising from initial motor start-up
(demurrage) currents.
Operation Principles
AKC-01D / AKC-03D  device measures the current of motor or protected
systems and are utilized to turn-off the motor or protected systems when
measured current is below the adjusted level.
When the current value is higher than 
Iset value, the output relay is  switched
on. When the current value becomes lower than 
Iset value, the output relay
is switched off after an adjustable tripping delay time and the motor or
protected system is turned off.
Please see following figures.
Start-up delay (adjustable: 1-6 sec. ) is developed in order to prevent false
contact turn-off arising from initial motor start-up currents.
Warning leds
On
:ON when power exists
Out 
:ON When the output relay is switched on.
I>Iset 
:LED turns ON when current value is over adjusted level
Rated Voltage (Un)
: Please look at the table on the device.
Operating Range
: (0.9 -1.1) x Un
Operating Frequency 
: 50 / 60 Hz
Current Adjustment Interval
: 0.5 - 5A(AC)
  Please refer to table 1 for AKC-03
Current Transformer Ratio
: .../ 5A (for AKC-01A/AKC-01D)
: CT-25 (for AKC-03A/AKC-03D)
Start-up Delay
: 1 - 6 sn.
Tripping Delay
: 0.5 - 2.5 sn.
Output Contacts
: 1 C/O, 8A, 2000 VA, Cosj=1
Ambient Temperature
: -5 
0
C ; +55 
0
C
Protection Class
: IP 20
Dimensions
: Tip PK 25
Installation
: Surface mounting or on the mounting rails.
Weight
: 0.3 kg
Technical Data
AKC-01A/AKC-01D Connection Diagram
AKC-3A / AKC-3D series must be used if current exceeds 5A.
AKC-03A/AKC-03D Connection Diagram
AKC-03A / AKC-03D is only
used with CT-25 current
transformer. In order to reach
the solution; CT-25 current
transformer must be used
with turn numbers in the
current intervals as in the
table.
Table 1
If you use AKC-03 device 2-20A interval, CT-25 current transformator
must be encircled with 3 turns of the cable that current flows. At that
time, I set scale takes the values below.
1,5x=2A, 3x=4A, 6x=8A, 9x=12A, 12x=16A, 15x=20A
According to Table 1
Precautions For Installation and Safe Use
Failure to follow those instructions will result in death or serious injury.
Disconnect all power before working on equipment.
When the device is connected to the network, do not remove the front panel.
Do not try to clean the device with solvent or the like.
Only clean the device with a dried cloth.
Verify correct terminal connections when wiring.
Electrical equipment should be serviced only by your compedent seller.
Mount device to the panel
No responsibility is assured by the manufacturer or any of its subsidiaries
for any consequences arising out of the use of this material.
1,5-15 A
x=4
I Set Scale Current Interval
Turn Number
(1 turn)
6-60 A
3-30 A
2-20 A
(4 turns)
(3 turns)
(2 turns)
x=2
x=4/3
x=1
TYPE PK 28
CT-25
16mm
15.5mm
43mm
500mm
2x0,35mm
2
Motor
Current
Normal
Operating
Current
Over Current Condition
(Above normal curent)
Over Current Trip Setpoint
(Iset)
Start-Up
Delay
Current sensitive
relay trips and
turns motor OFF
Over Current Monitoring Devices(AKC-01A/03A)
Time
Trip
Delay
Start-up current
Start Motor
Start-up Delay
Begins
Start-up Delay
   Ends
Trip Delay
  Begins
Trip Delay
Eds
Undercurrent Monitoring Devices (AKC-01D/03D)
Start-upCurrent
(Iset)
Under Current Condition
(Below normal current)
Current sensitive
relay trips and
turns motor OFF
Normal
Operating
Current
Under Current Trip Setpoint
Start Motor
Start-up Delay
Begins
Start-up Delay
    Ends
Trip Delay
  Begins
Trip Delay
Ends
Time
Motor
Current
Start-Up
Delay
Trip
Delay
T1
N
C
1
T1
Stop
Start
C1
L1
L2
L3
N
k
I
K
L
M
3 ~
N
L1
2
3
1
k
l
Un
0.5
1
1 0.5
OUT
ON
OUT
ON
I>Iset
AKC-01A/D
2.5
1.5
2
t(s)
Iset
5
4
3
2
1
2
3
6
5
4
3
2
1
t(s)
start
T1
N
L1
L2
L3
N
k
I
K
L
M
3 ~
Un
N L1
l k
2 3 1
Stop
Start
C1
AKC-01A
AKC-01D
C1
T1
Type PK 25
Type PK 28
T1
N
C
1
T1
Stop
Start
C1
L1
L2
L3
N
k
I
K
L
M
3 ~
N
L1
2
3
1
k
l
Un
T1
N
L1
L2
L3
N
k
I
K
L
M
3 ~
Un
N L1
l k
2 3 1
Stop
Start
C1
AKC-03A
AKC-03D
C1
T1
CT-25
k
l
l
k
K
L
CT-25
Type PK 25
Type PK 28
0.5
1
3x
1.5x
OUT
ON
OUT
ON
I>Iset
AKC-03A/D
2.5
1.5
2
t(s)
Iset
15x
12x
9x
6x
1
2
3
6
5
4
3
2
1
t(s)
start
Vertrieb durch TDE Instruments GmbH