CSMPA (Analog : Electronic Motor Protection Relays)
1. Check the rated voltage and apply the control supply to A1 and A2
terminal.
CAUTION :
Do not apply 220 V to 110 V model.
2. Check the “TEST/RESET” button operation.
Check the operation of the output contact.
Check if the control voltage and wiring method is correct (Refer to the
contact configuration).
When you press the “TEST/RESET” button, the “O.L” LED is turned ON
(Red) and the relay is tripped.
When you press the “TEST/RESET” button under the relay is tripped, the
“O.L” LED is turned OFF and the relay is reset.
Auto reset function : When it is tripped by the over current, it is reset after 1
Min. (Optional).
CAUTION :
For safety, when the motor is operating the “Test/Reset”
button do not work.
3. Set the operating time
The operating time is set on the base of 600% of the rated current in the
characteristic curve.
Set the operating time by considering the operating time and start current
according to the types of the load.
(Ex.: If the start current is 600% of the normal operating current and the
starting is 10sec., set the time knob around 11~12sec. with 10~20%
margin)
Operating time range is 0~30sec.
If the time knob is set to 10sec, the relay is tripped when the start current
(600% of the rated current) is applied for 10sec.
CAUTION :
The relay with inverse time characteristics can be tripped to
protect the motor when the motor is started a few times continuously.
When a motor is frequently changing the rotating direction (forward and
reverse), set the operating time longer. For the crane and hoist use, select
the relay with definite time characteristics.
4. Set the operating current
Set the current by considering the rated current of a motor to protect from the
over current.
Check if the rated current of a motor is within the current setting range of
relay.
Set the ‘RC(A)’ (Rated current) knob to the maximum value and then start a
motor.
Under normal motor operation, rotate the ‘RC’ knob to the
counterclockwise until the ‘O.L’ LED turned ON&OFF. The current at this
point in the 100% current rating under real load.
At this point, rotate the ‘RC’ knob to the clockwise until the ‘O.L’ LED
turned OFF. In general case the setting value is around 110-120% of the
rated current. (Ex.: When the ‘O.L’ LED flickering at 20A, the setting
current will be 22A (=20x1.1)
Note :
The brackets for connection is offered standard.
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Protection
: Over current & phase failure
Time setting
: Starting time (0.2-30 sec)
: Operating time(0.2-15 sec)
Accuracy
: Current/Time + 5% / (+0.5 sec)
Compact Size, Economical
Realys with built-in MCU (Micro Pressesor Control Unit)
Current setting: 0.5-6A or 5-60A options
Current setting 0.5-6A can be used upto 600A with external CT’s
Looping option is available for FHP Motors
Fault diagonstic by LED indication
Mounting option: 35mm Din-rail or Screw
Features (Definite Time Characteristics Type - CSMPA-6OT)
Operating & Setting of CSMPA22/40/80
O.L LED (2CT)
O.L/FAULT LED (3CT)
TEST/RESET
Button
RC(A) Knob
TIME Knob
Indicate the cause of the fault by the LEDs
When it is tripped, you can check the causes of the fault by seeing the LED on it
and you can troubleshoot the causes in a short time
Condition
O
p
er
at
io
n
Tr
ip
Normal
Off
Over
On &
current
Off
Over
On
current
R
On
Phase
failure
S
On
(3CT)
T
On
Phase
On &
failure(2CT) Off
Reverse
On &
phase(3CT) Off
Protect 2phases of 3phases,
trips within 3sec.
Off
Off
Off
On &
Off
On &
Off
On &
Off
On &
Off
0.4 second
interval
1 Times for
3 second
2 Times for
3 second
3 Times for
3 second
One after
the other
Red O.L LED
Green Fault LED
Note
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