K2CM-1L Omron, K2CM-1L Datasheet - Page 13

• 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

■ Voltage 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 transformer 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. Change the phase sequence to reverse-phase by switch-
2. Turn ON SW1 and SW2 and confirm that the K2CM oper-
3. Add a three-phase voltage regulator to the U, V, and W ter-
4. Adjust the voltage regulator and confirm that the K2CM
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.
ing the U and W input terminals of the K2CM as shown by
the dotted lines.
ates.
minal inputs.
operates at less than 80% of the rated supply voltage.
Operating value
U
R
1
Test procedure
(3-phase)
50/60 Hz
3φSD
200 V
R
2
V
R
1
1. Turn ON SW1 and SW2. Increase the current by adjusting
2. Turn ON SW1.
3. Turn ON SW2 and read the position (i.e., time) of the
4. Turn OFF the 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. Put the voltage input in the reverse-phase state.
2. Turn ON SW1 and SW2 and read the position of the
3. Turn OFF SW2.
W
SW
1
T
the voltage regulator to 600% of the set current value.
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.
Then turn OFF SW1 and SW2.
mum.
to 140% of the set current value. Confirm that the K2CM
performs the 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.
pointer of cycle counter CC when CC is stopped.
a
T
3φSD: Three-phase voltage regulator (5 to 15 A)
A:
V:
CC:
Y:
c
K2CM Motor Protective Relay
T
b
AC ammeter (5 A)
AC voltmeter (300 V)
Cycle counter
Auxiliary relay (15 A)
U V W
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
100 VAC
50/60 Hz
Y
Variable resistor (50 Ω, 400 W + 400 W)
Fixed resistor (50 Ω, 400 W + 400 W)
SW
2
K2CM
13