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Digital Heater Element Burnout Detector

K8AC-H

A high-precision Heater Element Burnout 
Detector compatible with a wide-range of 
heater control methods.

Screw-less clamp terminals to reduce work. 

*

1

Scaling 

*

1

NPN or PNP equivalent output. 

*

1

Lineup includes models compatible with many heater control 

methods, including ON/OFF control, phase control, and cyclic control. 

High-precision heater burnout alarm with digital measurement. 

Contributes to preventative maintenance.

If the gate function is disabled,  the gate input can be used as an 

undercurrent/overcurrent relay or for motor or lamp loads.

Undercurrent detection values can be set separately for CT1 and 

CT2.

  

*

2

CE marking and cUL certified (K8AC-H2

@@@

 Series pending).

*1.

K8AC-H2

@@@

 Series only.

*2.

The overvoltage detection value is the same

 for the CT1 and CT2. Also, there is one 

undercurrent output. 

Note:

Consult with your OMRON representativ e before using the K8AC with phase 

control or cyclic control un der the following conditions.

 Using multiple heaters with different heater capacities 

 Using heaters with varying heater resistance (e.g., halogen heaters)

Features

High-precision Heater 

Burnout Alarms with 

High-resolution Digital Measurement

Burnout Alarm Possible for One of Multiple 
Heater Elements

Heater burnout is detected by di gitally processi ng minor current 
fluctuations.

Screw-less Clamp Terminals for Reduced 

Work

(K8AC-H2

@@@

 Series Only)

Screw-clamp terminals  with no screws eliminate the need to control 
screw torque and retighten screw.

Easily connect terminal s using ferrules with  insulation sleeves.

Easy Scaling Using the External CT Ratio 

and Number of CT Passes

(K8AC-H2

@@@

 Series Only)

Easily set the scaling just by inpu tting (1) the CT ratio and (2) the 
number of CT passes.

Wide Current Input Range: 0.200 to 200.0 A AC.

K8AC-H

@

 

Digital Heater 

Element Burnout 

Detector 

E5

@@

Digital 

Temperature 

Controller 

Three-phase 

delta-connected heater 

G3PB 

Three-phase 

SSR

Current Transformer 

RST

Electric 

oven 

K8AC-CT

@

 

Current Transformer 

(2) Number of CT passes

(1) CT ratio 

Heater

External

CT 

@

A/1A

Intech Systems Chennai Pvt. Ltd,

 Chennai-600 032

Ph: +91 44 4353 8888 Fax: 044 4353 7888

E-mail: [email protected] Website: www.intechchennai.com

Authorised Distributors:-

Содержание K8AC-H2

Страница 1: ...different heater capacities Using heaters with varying heater resistance e g halogen heaters Features High precision Heater Burnout Alarms with High resolution Digital Measurement Burnout Alarm Possi...

Страница 2: ...e linked with the control output value from the temperature controller Compatible with Gradient Settings of Power Controllers When using gradient settings with a power controller set a gate current le...

Страница 3: ...tput specifi cations Com munica tions output Current input range 0 200 to 2 200 A 2 00 to 22 00 A 20 0 to 200 0 A 100 to 240 VAC ON OFF control SSR control Two current inputs for either single phase o...

Страница 4: ...200 ms min Input impedance 4 k min Cyclic and phase con trol 4 to 20 mA DC Burnout detection is possible for an input of 7 mA or greater Input impedance 50 max Outputs Relay contact outputs K8AC H C...

Страница 5: ...inals CT primary terminals and gate input terminals communications terminals Between power supply terminals CT primary terminals and output terminals Between gate input terminal communications termina...

Страница 6: ...VAC 0 3 A 30 VDC 1 A Maximum contact voltage 125 VAC 60 VDC Maximum contact current 1 A Maximum switching capaci ty 37 5 VA 30 W Minimum applicable load failure rate P value refer ence value 5 VDC 10...

Страница 7: ...ct to the operating power supply All models 3 to 4 5 to 6 Outputs Outputs SSR open or short circuit detection results Outputs heater burnout or layer short circuit detection results K8AC H2 N transist...

Страница 8: ...CTs for three phase heaters For three phase heaters always set the burnout alarm set values for both CT1 and CT2 5 6 3 4 Transistor Output K8AC H2 N FLK CT2 CT1 3 7 8 9 10 11 12 13 14 1 2 RS 485 X 4 5...

Страница 9: ...Transistor Output K8AC H2 N FLK Heater Power supply Power Regulator Temperature Controller 4 to 20 mA current output Operation Description If the heater current detected at either CT1 or CT2 falls bel...

Страница 10: ...o after one heater burns out with the current prior to the burnout i e the normal current taken as 1 3 In actual operation there may be effects from factors such as load heater imbalances so conduct a...

Страница 11: ...m is output accordingly SSR Short Circuit Detection If current is measured when there is no gate input an SSR short circuit error is detected and an alarm is output SSR Open Circuit Detection If curre...

Страница 12: ...Short Open Circuit Alarm Using the Power Regulator s Gradient Settings The power regulator s gradient settings can be used to prevent malfunction by setting the operation gate current level The relati...

Страница 13: ...urs open or short circuit OFF when SSR is normal ALM Alarm Lights for heater burnout or overcurrent OFF at all other times Up key Increments a set value when the set value is in change status Down key...

Страница 14: ...pe P should be selected Type P is also selected for cyclic control Select the appropriate relay or transistor output specifications depending on the application K8AC H Parameter Settings Procedure Onl...

Страница 15: ...open and short circuits and heater layer shorts The count is refreshed each time an alarm is output and it is saved in non volatile memory The value is saved when power is interrupted The number of o...

Страница 16: ...r at least 1s Press the L key for at least 1 s Press the S key for at least 1 s Press the L key for at least 1s When the key is released Press the S key for at least 1 s Press the L and M keys Press t...

Страница 17: ...etting value 1 Heater layer short circuit detection function SSR open circuit detection function SSR short circuit detection function Output ON delay time Soft startup time Startup lock time Gate inpu...

Страница 18: ...ction function ON and OFF ssht ON OFF OFF SSR Open Circuit Detection Turns the SSR open circuit detection function ON and OFF sopn ON OFF OFF Heater Layer Short Circuit Detection Overcurrent Detection...

Страница 19: ...following torque Power supply terminals 0 5 N m I O terminals 0 23 N m 35 2 1 1 7 4 5 6 100 90 K8AC H2 FLK To remove a wire insert the recom mended flat blade screwdriver straight into the hole under...

Страница 20: ...ories with K8AC CT20L Connection Example Contact Approx 3 dia 18 22 Approx 6 dia Plug Contact Lead Plug 100 15 30 30 5 Two M3 Depth 4 max 12 dia 40 40 5 15 Current Transformer K8AC CT200 Pre wired Lea...

Страница 21: ...se unintended operation and may result in accident or corruption of the product 3 Do not use thinner or similar solvent for cleaning Use commercial alcohol 4 When discarding properly dispose of the pr...

Страница 22: ...he current measurement value with the heater output at 100 This is because the burnout detection alarm of the K8AC H P FLK depends on the control input When you set the burnout alarm value make sure t...

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