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K2CU

Operation Check

K2CU-F

A- GS

The operation of the heater burnout detector can be easily checked
as follows:

In a Single-phase Circuit

Set the operating current to be 0.6 to 0.55 times the heater current.

Close the SW

with switch SW

turned on. Confirm that the alarm

indicator remains off.

Turn off SW

and confirm that the alarm indicator comes on, and that

the output relay operates.

K2CU-F

G+

G–

Heater

SSR

In a Three-phase, Delta Network

Set the operating current to be 0.6 times the heater current.

Close the SW

with switches SW

and SW

turned on. Confirm that

the alarm indicator remains off.

Turn off SW

and confirm that the alarm indicator comes on, and that

the output relay operates.

Turn on SW

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 SW

and confirm that the alarm indicator comes on, and that

the output relay operates.

G+

G–

K2CU-F

Heater

SSR

In a Three-phase, Star Network

Set the operating current to be 0.9 times the heater current.

Close the SW

with switch SW

turned on. Confirm that the alarm

indicator remains off.

Turn off SW

and confirm that the alarm indicator comes on, and that

the output relay operates.

G+

G–

K2CU-F

Heater

SSR

Содержание K2CU -

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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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