Omron K2CU - Manual Download

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Heater Element Burnout Detector

K2CU

Accurate Detection of Heater Element
Burnout Regardless of Heater
Capacities

Accurately detects a burned heater element or
elements incorporated by a molding machine or
packing machine and outputs an alarm signal.

Precisely singles out the burned element even if
one heater element among several heater
elements has been burned out.

Applicable to small- to large-capacity heater
elements.

All K2CU-F large-capacity, built-in current trans-
former models work with both single-phase and
three-phase heaters.

Voltage fluctuation compensation function elimi-
nates false alarms due to variations in the supply
voltage.

Ordering Information

K2CU-F

A-

GS Model with Gate Input Terminals

Control supply voltage

Operating current

4 to 10 A

8 to 20 A

16 to 40 A

32 to 80 A

100 VAC

With voltage fluctuation

K2CU-F10A-CGS

K2CU-F20A-CGS

K2CU-F40A-CGS

K2CU-F80A-CGS

110 VAC

compensation

K2CU-F10A-DGS

K2CU-F20A-DGS

K2CU-F40A-DGS

K2CU-F80A-DGS

200 VAC

K2CU-F10A-EGS

K2CU-F20A-EGS

K2CU-F40A-EGS

K2CU-F80A-EGS

220 VAC

K2CU-F10A-FGS

K2CU-F20A-FGS

K2CU-F40A-FGS

K2CU-F80A-FGS

K2CU-F Large-capacity, Built-in Current Transformer Models

Control supply voltage

Operating current

4 to 10 A

8 to 20 A

16 to 40 A

32 to 80 A

100 VAC

With voltage fluctuation

K2CU-F10A-C

K2CU-F20A-C

K2CU-F40A-C

K2CU-F80A-C

110 VAC

compensation

K2CU-F10A-D

K2CU-F20A-D

K2CU-F40A-D

K2CU-F80A-D

200 VAC

K2CU-F10A-E

K2CU-F20A-E

K2CU-F40A-E

K2CU-F80A-E

220 VAC

K2CU-F10A-F

K2CU-F20A-F

K2CU-F40A-F

K2CU-F80A-F

K2CU-P Small-capacity, Plug-in Models

Control supply voltage

Operating current

0.25 to 0.5 A

0.5 to 1 A

1 to 2 A

2 to 4 A

100/
200 VAC

With voltage fluctuation
compensation

K2CU-P0.5A-A

K2CU-P1A-A

K2CU-P2A-A

K2CU-P4A-A

Without voltage
fluctuation compensation

---

K2CU-P1-A

K2CU-P2-A

K2CU-P4-A

110/
220 VAC

With voltage fluctuation
compensation

K2CU-P0.5A-B

K2CU-P1A-B

K2CU-P2A-B

K2CU-P4A-B

Without voltage
fluctuation compensation

---

K2CU-P1-B

K2CU-P2-B

K2CU-P4-B

Summary of Contents for K2CU -

Page 1: ...CU F80A CGS 110 VAC compensation K2CU F10A DGS K2CU F20A DGS K2CU F40A DGS K2CU F80A DGS 200 VAC K2CU F10A EGS K2CU F20A EGS K2CU F40A EGS K2CU F80A EGS 220 VAC K2CU F10A FGS K2CU F20A FGS K2CU F40A FGS K2CU F80A FGS K2CU F Large capacity Built in Current Transformer Models Control supply voltage Operating current 4 to 10 A 8 to 20 A 16 to 40 A 32 to 80 A 100 VAC With voltage fluctuation K2CU F10A...

Page 2: ...Repeat accuracy 3 max Influence of temperature 10 max at 20 C 30 C Influence of voltage Models without voltage fluctuation compensation 3 max of the value measured at the control supply voltage on condition that the voltage fluctuation is 85 to 110 of the control supply voltage Models with voltage fluctuation compensation 5 max of the logical value on condition that the voltage fluctuation is 85 t...

Page 3: ...wo detector sections operating independently If either of the input signals from the CTs is lower than the reference value the output relay and alarm indicator will be activated The K2CU FjjA jGS incorporates a voltage fluctuation com pensation function which automatically corrects the reference value if the supply voltage fluctuates Current voltage converter Smoothing circuit Gate circuit Setting...

Page 4: ...Ts is lower than the reference value the output relay and alarm indicator will be activated The K2CU F incorporates a voltage fluctuation compensation func tion which automatically corrects the reference value if the supply voltage fluctuates Current voltage converter Smoothing circuit Setting circuit Reference voltage generator Power circuit Current voltage converter Smoothing circuit BZ Output c...

Page 5: ...ue Normal current abnormal current 2 Knob Red point indicates the set value Heater Connection and Current The following table shows the different connections possible The formula under each illustration indicates the electrical current value of the heater elements under normal and abnormal conditions Phase Normal condition Abnormal condition Single phase 200 V 5 A 5 A 1 kW 200 V 0 A 0 A Three phas...

Page 6: ...SW1 and SW2 turned on Confirm that the alarm indicator remains off Turn off SW2 and confirm that the alarm indicator comes on and that the output relay operates Turn on SW1 set the operating current to be 0 9 times the heater cur rent and confirm that the alarm indicator goes off and the output relay releases Turn off SW1 and confirm that the alarm indicator comes on and that the output relay oper...

Page 7: ...dow type Current Transformer of the heater burnout detector Close the SW2 with switch SW1 turned on Confirm that the alarm indicator remains off Turn off SW1 and confirm that the alarm indicator comes on and that the output relay operates G K2CU F Heater SSR SW2 SW1 G S1 S2 K2CU F K2CU P The operation of the heater burnout detector can be easily checked as follows In a Single phase Circuit Set the...

Page 8: ...rm indicator remains off Turn off SW1 and confirm that the alarm indicator comes on and that the output relay operates Heater S1 S2 K2CU F SW1 Contactor In a Three phase V Network 1 Set the operating current to be 0 3 to 0 35 times the heater current Close the contactor with switch SW1 turned on Confirm that the alarm indicator remains off Turn off SW1 and confirm that the alarm indicator comes on...

Page 9: ...tted lines indicate the line con ductor passing through the round window of the current transformer Note Determine the value of R according to the specifications of the K2CU to be used The dotted line indicates the connection at a supply voltage of 100 or 110 VAC K2CU F K2CU P Dimensions Note All units are in millimeters unless otherwise indicated K2CU P Connecting Socket K2CU P 8PFA1 108 89 7 8 5...

Page 10: ...CU F on a flat surface 2 When solderless terminal lugs are desired use ones having an outer diameter of 6 5 mm maximum Installation External Connections K2CU F A GS Single phase Heater Three phase Heater G G S1 S2 b1 CM1 a1 SSR Y BZ L Y a Heater K2CU F G G S1 S2 b1 CM1 a1 Y BZ L SSR Temperature sensor Y a Heater K2CU F Temperature controller Temperature controller Power source Power source Control...

Page 11: ...ller Power source Control contact Control contact Contactor Contactor Temperature sensor Temperature sensor Three phase V connected Heater With External Current Transformer S1 S2 b1 CM1 al Heater K2CU F S1 S2 b1 CM1 al Heater K2CU F10A j Power source CT jA SA CT jA SA Note Pass two out of the three line conductors through the current transformers of the heater burnout detector twice as shown ...

Page 12: ...the two lines through the openings of the heater burnout detector When a three phase heat er is used pass two phases of the three lines through the open ings In either case if only one line passes through an alarm signal will always be produced With single phase power supply With three phase power supply Heater Heater Pass the lines through the openings only once If they are passed more than once ...

Page 13: ...al and 100 V or 110 V terminal or the 0 V terminal and 200 V or 220 V terminal of the K2CU P otherwise the K2CU P will not operate Operating Current Setting when Several Heaters are Used The following table shows relative values of changes in the current when any one of several heaters connected in parallel has burned out The current value under normal condition is 1 Use this table as a guideline ...

Page 14: ...a 540 Japan Phone 06 949 6014 Fax 06 949 6028 ALL DIMENSIONS SHOWN ARE IN MILLIMETERS To convert millimeters into inches multiply by 0 03937 To convert grams into ounces multiply by 0 03527 Cat No N39 E1 2 In the interest of product improvement specifications are subject to change without notice Printed in Japan 0393 1M 0393 ...

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