Thyristor Controllers and Solid State Relay - Concept & Applications
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Transcript of Thyristor Controllers and Solid State Relay - Concept & Applications
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We are proud suppliers of : Vikram Sarabhai Space Centre, Trivendrum Rohm & Hass Pvt. Ltd. (Division of Dow
Chemicals), Mumbai VIP Industries Ltd., Haridwar Flitguard ,Hosur Kirloskar Brothers Ltd., Devas MEBPOY Company Ltd, Bangladesh
Neptune Refri. Pvt. Ltd., Mumbai Indian Institue Of Technology, New Delhi National Chemical Laboratory,Pune College Of Engineering,Pune
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SCR HEATER CONTROLLERS
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Thermal System:
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Electronic circuit which Switch the SCR on and off
Heat sink to dessipate heat produced by SCR
The Silicon Controller Rectifier
SCR Heater Controller
(Three main parts)
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Thermal system with SCR heater controller
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What is SCR? SCR:SILICON CONTROLLED RECTIFIER
It is a modified semiconductor diode.
Also called Thyristor.
It is a diode having ‘gate’
The SCR is the power-handling electronic device in
an SCR heater control. An SCR conducts current in only one direction, two
SCRs are connected in an inverse parallel, or "back-to-back,"configuration when used as the power
control.
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We can greatly extend heater life by reducing the
temperature cycling which the resistance element
in heater experiences.
To increase the ability of a PID temperature
controller to respond to temperature changes inthe work load & hence to increase heater life.
Why do we use a SCR power
controller in a thermal system?
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The advantages of SCR Controls over
other temperature control methods
Improved response time.
Closer process control.
Extended heater life.
Reduced maintenance costs.
Silent operation. No arcing andsparking.
Reduced peak power consumption
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Applications:SCR Heater Controllers Are used :
For fast heater switching
To switch higher amperage electric heaters To control variable resistance heaters
To control transformers coupled resistance heaters
In high-speed paper and ink dryers, hightemperature IR heating, high temperaturematerials processing
High-temperature ovens and furnaces, kilns, glass,ceramics & high-temperature alloys.
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Solid State Relays
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OverviewSolid State Relays are available mainly in 2
models.
1.PCB mountable :Available up to 05 A. AC.
2.Chassis mountable:
Available up to 75 A. AC. & 440 V.AC.Also available with “Over Current
Protection”.
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Features & Benefits Opto isolation between input & output.
Zero or random voltage turn on.
TTL or CMOS compatible.
No moving parts.
No contact bounce.
Fast operation.
Shock & vibration resistance.
Output contact latching.
High sensitivity.
No contact wear & arcing.
No electromagnetic interference.
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Applications Temp. control system :
Heating control & Infra red heating control.
Microprocessor based systems:CNC machines, Automatic vending machines &
Injection moulding machines.
Medical equipments. Special purpose machines.
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Specifications Input voltage range. 04 – 32 V. DC.
or
170 – 270 V. AC.
Max. input current. 30 MA. DC.
15 MA. AC. Zero cross voltage. 15 V. PK.
RMS on state current. 10, 16, 25, A.
40, 50, 60.
RMS on state voltage. 1.8 or 3.0 V. AC.
Peak rep. Off state voltage. 600, 800, V. PK.
1000, 1200. Half cycle surge current. 100, 150, A.
250, 300.
Critical rate of rise of off 200 V/usec.
state voltage.
Isolation voltage. 1500 V. AC.
Response time. 10 or 1 m. sec.
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Pricing Solid State Relays are available from Rs. 210/-
onwards.
For more details, please contact.
Savik Enterprises,
724/9A, Indira,
Senadatta Peth,
Pune 411 030. (India)
Tele Fax. : +9120-24531088.Mobile: +91-8308839755
E mail. : [email protected]
Web.:www.savikenterprises.co.in
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Some More Industrial Products By Us :
Cold room Alarm System
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Thyristor Driver & Relay Interface Cards
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Control Panels
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Availability All products listed in this catalogue are available ex.
Stock or within 8 – 10 days. For more information or order, please contact.
Savik Enterprises,724/ 9A, Indira,Senadatta Peth,Pune 411 030. (India)
Tele Fax. : +9120-24531088Mobile: +91-8308839755E mail.: [email protected] web.: www.savikenterprises.in
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Thank You!!
For more details and specifications of products,do visit us at
www.savikenterprises.in
