Omron K2CU Manual

Omron K2CU Manual

Heater element burnout detector

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Heater Element Burnout Detector
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-FjjA-jGS Model with Gate Input Terminals
Control supply voltage
100 VAC
With voltage fluctuation
110 VAC
compensation
200 VAC
220 VAC
K2CU-F Large-capacity, Built-in Current Transformer Models
Control supply voltage
100 VAC
With voltage fluctuation
110 VAC
compensation
200 VAC
220 VAC
K2CU-P Small-capacity, Plug-in Models
Control supply voltage
100/
With voltage fluctuation
200 VAC
compensation
Without voltage
fluctuation compensation
110/
With voltage fluctuation
220 VAC
compensation
Without voltage
fluctuation compensation
4 to 10 A
K2CU-F10A-CGS
K2CU-F20A-CGS
K2CU-F10A-DGS
K2CU-F20A-DGS
K2CU-F10A-EGS
K2CU-F20A-EGS
K2CU-F10A-FGS
K2CU-F20A-FGS
4 to 10 A
K2CU-F10A-C
K2CU-F20A-C
K2CU-F10A-D
K2CU-F20A-D
K2CU-F10A-E
K2CU-F20A-E
K2CU-F10A-F
K2CU-F20A-F
0.25 to 0.5 A
0.5 to 1 A
K2CU-P0.5A-A
K2CU-P1A-A
---
K2CU-P1-A
K2CU-P0.5A-B
K2CU-P1A-B
---
K2CU-P1-B
Operating current
8 to 20 A
16 to 40 A
K2CU-F40A-CGS
K2CU-F40A-DGS
K2CU-F40A-EGS
K2CU-F40A-FGS
Operating current
8 to 20 A
16 to 40 A
K2CU-F40A-C
K2CU-F40A-D
K2CU-F40A-E
K2CU-F40A-F
Operating current
1 to 2 A
K2CU-P2A-A
K2CU-P2-A
K2CU-P2A-B
K2CU-P2-B
K2CU
32 to 80 A
K2CU-F80A-CGS
K2CU-F80A-DGS
K2CU-F80A-EGS
K2CU-F80A-FGS
32 to 80 A
K2CU-F80A-C
K2CU-F80A-D
K2CU-F80A-E
K2CU-F80A-F
2 to 4 A
K2CU-P4A-A
K2CU-P4-A
K2CU-P4A-B
K2CU-P4-B
1

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Summary of Contents for Omron K2CU

  • Page 1: Ordering Information

    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-FjjA-jGS Model with Gate Input Terminals Control supply voltage...
  • Page 2: Specifications

    K2CU-F: approx. 390 g; K2CU-P: approx. 300 g Note: The logical value is an operating value within a range of 0.85 to 1.1 with a voltage fluctuation of 85% to 110%, based on the value at the control supply voltage measured as 1.
  • Page 3 Approximately 3.4 mA at 12 VDC Approximately 6.7 mA at 24 VDC 3 When using a K2CU which has the model number suffix ”GS” (a model that incorporates gate input terminals), the control output of the temperature controller must be a voltage output type.
  • Page 4 Output relay Alarm indicator Note: The dotted lines indicate the line conductors passing through the windows of the current transformers. Heater elements K2CU-P Series The K2CU-P operates basically in the same way as the K2CU-F. The comparator compares external current signals and the refer- ence value and outputs the result of the comparison to the output circuit.
  • Page 5 200 V 1 kW 2.5 A (5 A x = 8.7 A) (5A x 1/2) (5A x 1) Note: Values in this table are correct when a 200 VAC, 1 kW heater is used on a single-phase or three-phase current.
  • Page 6: Operation Check

    In a Single-phase Circuit Turn off SW and confirm that the alarm indicator comes on, and that Set the operating current to be 0.6 to 0.55 times the heater current. the output relay operates. Close the SW with switch SW turned on.
  • Page 7 In a Three-phase, V Network 1 In a Three-phase, V Network 2 Set the operating current to be 0.3 to 0.35 times the heater current. Set the operating current to be 0.6 times the heater current (of the phase connected between terminals 1 and 2, or the one passed...
  • Page 8 In a Three-phase, Delta Network In a Three-phase, V Network 1 Set the operating current to be 0.6 times the heater current. Set the operating current to be 0.3 to 0.35 times the heater current. Close the contactor with switches SW and SW turned on.
  • Page 9: Test Circuit

    Slidac K2CU-P 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. Dimensions Note: All units are in millimeters unless otherwise indicated.
  • Page 10: External Connections

    Mounting Holes Two, 6-dia. or M5 6.5 mm max. mounting holes Note: 1. Install the K2CU-F on a flat surface. 2. When solderless terminal lugs are desired, use ones having an outer 6.5 mm max. diameter of 6.5 mm maximum.
  • Page 11 Heater Heater Three-phase, V-connected Heater With External Current Transformer Power source K2CU-F10A-j jA/SA K2CU-F Heater jA/SA Note: Pass two out of the three line conductors through the current transformers of the heater burnout detector twice as shown. Heater...
  • Page 12 “window” of the window-type Current Transformer. 2. Y: External relay for self-holding circuit BZ: Alarm buzzer Alarm indicator 3. To use an 100 (110) VAC control power supply with K2CU-P, connect it to terminal 7 instead of 6. Precautions K2CU-F A- GS Pass the lines through the openings only once.
  • Page 13 No. of heater per phase = n Note: 1. This table shows the respective change rates in current when any one of several heaters connected in parallel has burned out. 2. The current value under the normal condition is 1.
  • Page 14 K2CU K2CU 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.

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