K2CM-1L Omron, K2CM-1L Datasheet - Page 12

• Manufacturer Part Number: K2CM-1L
• Description: RELAY MOTOR PROTECTIVE 8-26A
• Manufacturer: Omron
• Series: K2CMr

Specifications of K2CM-1L

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: K2CM1L

Testing Method
■ Current Reverse-phase Detection Models
The operating characteristics listed in the table below are
tested using the circuit shown on the right. Decide the number
of conductor passes through the holes of the current trans-
former in accordance with the operating current range of the
Motor Protective Relay and by referring to the current setting
method described under Operation, Setting, and Indication.
* Balance the currents between phases by adjusting variable resistor R1.
** If a current equal to 600% of the set current value cannot be attained by adjusting the voltage regulator, increase the number of conductor passes
Over-
current
Open-phase
Reverse-phase
through the holes of the current transformer.
Test item
Inverse type
Instantaneous
type
1. Turn ON SW1.
2. Turn ON SW2 to operate auxiliary relay Y.
3. Gradually increase the current by adjusting the voltage
4. Turn OFF SW1 and SW2.
1. Open (disconnect) any one of the input phases for the cur-
2. Turn ON SW1 and SW2. Gradually increase the current by
3. Confirm that the K2CM operates at a current no greater
4. Turn OFF SW1 and SW2.
1. Interchange any two phases at a position closer to the
2. Turn ON SW1 and SW2. Decrease the current to 50% of
3. Turn ON SW1 and SW2 again. Confirm that the K2CM
4. Turn OFF SW1 and SW2.
regulator. With inverse-type models, read the value of the
current when the overcurrent LED indicator blinks. With
instantaneous-type models, read the value when it lights
(continuously).*
rent transformer.
adjusting the voltage regulator.
than 85% of the set current value and that, at this current,
the trip indicator is orange and the open-phase LED indica-
tor lights.
power supply than the current transformer. (In the above
figure, phases U and V are interchanged as shown by the
dotted lines.)
the set current value by adjusting the voltage regulator.
Then turn OFF SW1 and SW2 temporarily.
operates, the trip indicator is orange, and that the reverse-
phase LED lights.
Operating value
U
R
1
Test procedure
(3-phase)
50/60 Hz
200 V
3φSD
R
2
V
R
1
1. Turn ON SW1 and SW2. Increase the current to 600% of
2. Turn ON SW1.
3. Turn ON SW2 and read the position (i.e., time) of the
4. Turn OFF SW1 and SW2.
1. Turn ON SW1 and SW2. Increase the current to 100% of
2. Turn ON SW1 and SW2 again and wait 2 seconds mini-
3. Using the voltage regulator, abruptly increase the current
4. Turn OFF SW1 and SW2.
1. Open (disconnect) any one of the input phases for the cur-
2. Turn ON SW1 and SW2. Increase the currents of the other
3. Turn ON SW1 and SW2 again. Read the position (i.e.,
4. Turn OFF SW1 and SW2.
1. Interchange any two phases at a position closer to the
2. Turn ON SW1 and SW2. Increase the current to 100% of
3. Turn ON SW1 and SW2 again. Read the position (i.e.,
4. Turn OFF SW1 and SW2.
W
SW
1
a
the set current value by adjusting the voltage regulator.
Turn OFF SW1 and SW2.**
pointer of cycle counter CC when CC is stopped by the
operation of the K2CM. The read time is the operating time
for inverse-type models and the lock time of the instanta-
neous-type models.
the set current value by adjusting the voltage regulator.
Turn OFF SW1 and SW2.
mum.
to 140% of the set current value. Confirm that the K2CM
performs instantaneous operation.
rent transformer.
two phases to 115% of the set current value by adjusting
the voltage regulator. Turn OFF SW1 and SW2 temporarily.
time) of the pointer of cycle counter CC when CC is
stopped by the operation of the K2CM.
power supply than the current transformer. (In the above
figure, phases U and V are exchanged as shown by the
dotted lines.)
the set current value by adjusting the voltage regulator.
Then turn OFF SW1 and SW2 temporarily.
time) of the pointer of cycle counter CC when CC is
stopped by the operation of the K2CM.
1
K2CM Motor Protective Relay
3φSD: Three-phase voltage regulator (5 to 15 A)
A:
V:
CC:
Y:
c
1
b
AC ammeter (5 A)
AC voltmeter (300 V)
Cycle counter
Auxiliary relay (15 A)
2
c
2
s
1
s
2
Minimum set time is 2 s.
Operating time
100 V
C
±
CC
R1:
R
SW
SW
2
:
1
2
: Knife switch (3-phase)
: Toggle switch
Variable resistor (50 Ω, 400 W + 400 W)
Fixed resistor (50 Ω, 400 W + 400 W)
100 VAC
50/60Hz
Y
SW
2
K2CM
12