Omron K2CM Series, Manual

5

K2CM

■

Current Reverse-phase Detection Models

Terminal Arrangement

•

Perform the external connections by referring to the examples given below.

•

Connect the phase advancing capacitors closer to the power supply than the
current transformer as shown in the examples.

•

Tighten the terminal screws to a torque of 0.98 N·m max. (The appropriate
tightening torque is 0.49 to 0.67 N·m.)

•

Use of insulated solderless terminals is recommended for connection to the
Relay terminals (M3.5). 

Note: 1.

In principle, the K2CM must be surface mounted with the terminal
block facing downward.

2.

Use M5 screws with spring washers and flat washers for mounting.
Tighten the screws to a torque of 1.77 N·m max. (The appropriate
tightening torque is 1.08 to 1.57 N·m.) 

Manual Operation Low-voltage Circuit

Manual Operating Low-voltage Circuit (

Start)

Note:

Connect the phase advancing capacitor on the power supply 
side of the Motor Protective Relay as shown in the above 
diagrams.

Manual Operation Low-voltage Circuit (High-
capacity Motor)

Automatic Operation Low-voltage Circuit

Manual Operation High-voltage Circuit

S

1

C

2

b

2

a

1

c

1

S

2

O

u

tp

u

t contacts

(

N

O and 

N

C)

Control po

w

er

s

u

pply

R

S

T

BZ

R
U
A

1

S

V

B
2

T

W

C

3

a

1

c

1

b

2

c

2

s

1

s

2

M

200 

V

AC

50/60Hz

Stop

Start

Phase 
ad

v

ancing

capacitor

Alarm

bu

zzer

Magnet 
contactor

Motor protecti

v

e relay

Motor

R

S

T

BZ

R
U
A

1

S

V

B
2

T

W

C

3

a

1

c

1

b

2

c

2

s

1

s

2

M

changeo

v

er

200 

V

AC

50/60Hz

Stop

Start

Phase 
ad

v

ancing

capacitor

Alarm

bu

zzer

Magnet 
contactor

Motor protecti

v

e relay

R

S

T

BZ

R
U
A

1

S

V

B
2

T

W

C

3

a

1

c

1

b

2

c

2

s

1

s

2

M

C

u

rrent con

v

erter for

meas

u

ring de

v

ice 

@

/5A

Motor

200 

V

AC

50/60Hz

Stop

Start

Phase ad

v

ancing

capacitor

Alarm

bu

zzer

Magnet 
contactor

Motor protecti

v

e relay

R

S

T

BZ

R
U
A

1

S

V

B
2

T

W

C

3

M

a

1

c

1

b

2

c

2

s

1

s

2

A

u

tomatic 

contact

Motor

200 

V

AC

50/60Hz

Phase ad

v

ancing

capacitor

Alarm

bu

zzer

Magnet 
contactor

Motor protecti

v

e relay

R

S

T

X/a

BZ

R
U
A

1

S

V

B
2

T

W

C

3

M

Transformer 

@

/100

V

a

1

c

1

b

2

c

2

s

1

s

2

X

3,300 

V

AC

50/60Hz

A

u

xiliary

relay

High-

v

oltage

motor

High-tension
f

u

se

C

u

rrent con

v

erter for

meas

u

ring de

v

ice 

@

/5A

Stop

Start

Phase ad

v

ancing

capacitor

Alarm

bu

zzer

High-

v

oltage 

magnet contactor

Motor protecti

v

e relay