Category: THERMOSTAT PRODUCT LIST

Thermal Cutout

Thermal Cutout Model IR is manufactured in India by Portex Technologies and was developed with a metal body, but, at the same time keeping the size small. This thermal cutout has a deep drawn seamless aluminum body which gives it strength and better temperature sensing capability. It is the smallest metal body thermal cutout in our complete range of thermal overload protectors. It has a high temperature resistance engineering polymer insulation in the inside and so the outer metal body is electrically insulated, hence, there is no chance of any electrical shock. Due to the inbuilt insulation, there is no need of a plastic insulating sleeve. It does not have any mounting arrangement as it is designed to be inserted in any cavity of the equipment. It can also be fixed with a clamp or any high temperature adhesive or it can be taped on to the equipment with a high temperature tape.

The operating principle of this thermal cutout is based on the over center mechanism, which operates a snap action bimetal strip and a beryllium copper switching blade. This mechanism is much more efficient that the snap action disc thermostat mechanism because it provides our thermal cutout with quick restart feature and stable trip temperature. The contacts of the metal body thermal cutout are made of solid silver. This gives the thermal cutout a long life and better performance characteristics. All the components of this thermal cutout are spot welded on a stainless steel housing plate. The lead wires are teflon insulated which can withstand high temperature. The body is doubled sealed with an industrial grade epoxy. Due to this the operating characteristics of our thermal cutout model IR are not affected by moisture, varnish, dust, etc. It is available with Normally Open (N.O.) and Normally Closed (N.C.) contacts.

Special Features of Thermal Cutout

• Deep drawn seamless Aluminum body
• Small size for easy fitting
• Better temperature sensing and more strength
• Snap Action bimetal Thermal Cutout
• Quick make and break switching
• No Chattering or sparking
• Solid silver contacts for long life or 1,00,000 operations
• Lead wires are teflon insulated.
• Available with Normally Open (N.O.) or Normally Closed (N.C) contacts
• Available for any trip temperature required from 50C to 160C.

Technical Specifications of Thermal Cutout

Voltage	Upto 250 VAC or 24 VDC
Continuous Load	Upto 8 AMPS
Maximum Load Switching  Capacity	30 AMPS
Contacts Configuration	Available in Normally Open (N.O.) or Normally Closed (N.C) contacts
Switching Action	SPST Normally Closed (N.C.) contacts which open with a snap action. Also available Normally Open (N.O.) contacts which close with a snap action.
Flash-over Voltage	Exceeds 2 KV between body & leads.
Endurance (Life)	Exceeds 100,000 operations (trippings).
Trip Temperature	Available preset between 50 ± 5 degrees C to 160 ± 5 degrees C specified by customer. Not adjustable.
Reset Temperature	Resets approx. 15 ± 5 C below trip temperature.
Restart Mode	Automatic restart upon cooling. Adequate precaution must be exercised in applications where automatic restart can cause injury, i.e., power tools, mixie blade, power saws, machinery etc.

Applications of Thermal Cutout

• Heating Moulds
• Welding equipment & gas pre-heaters
• Motor overheat & burnout protection – all sizes (single and three phase)
• Automotive and Lightings
• Transformer overheat & burnout protection (all sizes)
• Bearing and bushes overheat sensors
• Industrial electronics: overheat protection of thyristors, power transistors, SCRs, etc.
• Industrial machinery
• Heat sinks over temperature sensor
• Surface Heaters, Oven Thermostats

Bimetal Thermostat Models ISQA, ISQB and ISQC have been developed after extensive research and development by our engineering team to address the customers’ requirement of durability, rigidity of body and ease of mounting. These bimetal thermostats are the newest models in our range of products. Each bimetal thermostat has a solid machined aluminum body to provide greater strength. Due to the metal body, these bimetal thermostats have better heat sensing capability than ordinary thermal overload protectors.

Mounting Arrangements –

All the three models have different mounting arrangements to suit the customers’ needs.

• • Model ISQA has two holes at the end, by which it can be screwed on to any flat surface.
  • Model ISQB has two grooves, one on each end. It can also be mounted with two M3 screws.
  • Model ISQC has only one groove at the end, by which it can be screwed.

Bimetal Thermostat – Model ISQA

Snap Disc Thermostat – Model ISQB

Snap Action Thermostat- Model ISQC

The outer metal body of all these bimetal thermostats are electrically insulated, as there in inbuilt engineering polymer electrical insulation inside, and so there is no chance of any electrical shock. All the internal components are spot welded on a stainless steel housing plate. The operating principle of these thermal overload protectors are based on the over center mechanism which operate a snap action bimetal with a beryllium copper switching blade. This provides the bimetal thermostat with quick restart and stable trip temperature. The normal snap action disc thermostats are have delayed restart and the trip temperature drifts after long usage. The contacts are made of solid silver for long life. It is available with Normally Closed or Normally Open contacts. Due to the aluminum body, response to temperature rise is fast, and when the equipment overheats, the thermal overload protector will trip off, ensuring complete protection.

Special Features of Bimetal Thermostat:

• • • Aluminum body for strength better heat sensing
    • Snap Action for quick make and break switching.
    • Chattering free and precise operating characteristics.
    • Solid silver contacts for long life.
    • Sealed body resistant to moisture, gases, fumes and varnish.
    • Lead wires are teflon insulated.
    • Available with Normally Open (N.O.) or Normally Closed (N.C) contacts
    • Available for any trip temperature required from 50C to 160C.

Technical Specifications

Voltage	Upto 250 VAC or 24 VDC
Continuous Load	Upto 8 AMPS
Maximum Load Switching  Capacity	30 AMPS
Switching Action	SPST Normally Closed (N.C.) contacts which open with a snap action. Also available Normally Open (N.O.) contacts which close with a snap action.
Flash-over Voltage	Exceeds 2 KV between body & leads.
Endurance (Life)	Exceeds 100,000 operations (trippings).
Trip Temperature	Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Not adjustable.
Reset Temperature	Reset temperature approx. 15 ± 5 C below trip temperature.
Restart Mode	Automatic restart upon cooling. Adequate precaution must be exercised in applications where automatic restart can cause injury, i.e., power tools, mixie blade, power saws, machinery etc.

Applications

• • Heating Moulds
  • Welding equipment & gas pre-heaters
  • Motor overheat & burnout protection – all sizes (single and three phase)
  • Oven Thermostats
  • Transformer overheat & burnout protection (all sizes)
  • Industrial electronics: overheat protection of thyristors, power transistors, SCRs, etc.
  • Industrial Machinery
  • Aluminum channel heat sink over-temperature sensor
  • Surface Heaters
  • Bearing and bushes overheat sensors

Liquid Temperature Sensing Thermostat – Model ITD

Thermostat Model ITD was designed specifically for monitoring temperature of liquids and for over temperature protection of oil transformers. This thermostat has a brass body machined from solid drawn rod. It has a 1/4″ BSP Hex nut threading for screwing into any location, like hydraulic lines, tanks, pipe lines, radiators, engines, oil filled transformers, oil baths etc. This thermostat is also available with a threaded extension at the lead end for conduit connection.

All the internal components and spot welded and the contacts are made of solid silver. This provide the thermostat with a long life. The body of the thermostat is double sealed and it is not affected by varnish, dust, fumes, gases, etc. The lead wires are teflon insulated and can with stand high temperature. This thermal overload protector is available with Normally Open (N.O.) or Normally Closed (N.C.) contacts.

The normal snap action disc thermostats have delayed restart and the trip temperature drifts downwards after using it for a few months. Our thermostats is based on the over center mechanism which operates a snap action bimetal and beryllium copper switching blade. This results in stable trip temperature even after continuous usage, quick restart and quick make and break switching.

Special Features:

• Solid brass body for strength
• Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
• Better heat sensing capability
• 1/4″ BSP threading for easy mounting
• Solid silver contacts for long life of 1,00,000 operations
• Snap action bimetal thermostat
• Teflon insulated lead wires
• Available in any temperature from 50C to 160C
• Technical Specifications

Voltage	Upto 250 VAC or 24 VDC
Continuous Load	Upto 8 AMPS
Maximum Load Switching  Capacity	30 AMPS
Contacts Configuration	Available in Normally Open (N.O.) or Normally Closed (N.C) contacts
Switching Action	SPST Normally Closed (N.C.) contacts which open with a snap action at preset temperature. Also available Normally Open (N.O.) contacts which close with a snap action at preset temperature.
Flash-over Voltage	Exceeds 2 KV between body & leads.
Endurance (Life)	Exceeds 100,000 operations (trippings).
Trip Temperature	Available preset for any trip temperature between 50 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
Reset Temperature	Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.
Restart Mode	Automatic restart upon cooling.

Applications

• Monitoring Temperature of liquids
• Over Temperature protection of Oil filled transformers
• Car Radiators and engines
• Hydraulic lines and tanks
• Pipelines for fluids and hot gases

This thermostat has a brass body machined from solid drawn rod, Front Copper Tip. All the internal components and spot welded and the contacts are made of solid silver. This provide the thermostat with a long life. The body of the thermostat is double sealed and it is not affected by varnish, dust, fumes, gases, etc. The lead wires are Teflon insulated and can with stand high temperature.

SPECIAL FEATURES :-

• Solid brass body for strength
• Available with Normally Open (N.O.) or Normally Closed (N.C.) contacts
• Better heat sensing capability
• 1/2″ BSP threading for easy mounting
• Solid silver contacts for long life of 1,00,000 operations
• Snap action bimetal thermostat
• Teflon insulated lead wires
• Available in any temperature from 60C to 160C

Technical Specifications :-

Voltage	Upto 250 VAC or 24 VDC
Continuous Load	Upto 8 AMPS
Maximum Load  Switching  Capacity	30 AMPS
Switching Action	SPST Normally Closed (N.C.) contacts which open with a snap action at preset temperature. Also available Normally Open (N.O.) contacts which close with a snap action at preset temperature.
Flash-over Voltage	Exceeds 2 KV between body & leads.
Endurance (Life)	Exceeds 100,000 operations (tripping).
Trip Temperature	Available preset for any trip temperature between 60 ± 5 C to 160 ± 5 C specified by customer. Trip temperature not adjustable.
Reset Temperature	Reset temperature (restart temp) approx. 15 ± 5 C below trip temperature.

APPLICATIONS:-

• Monitoring Temperature of liquids
• Over Temperature protection of Oil filled transformers
• Car Radiators and engines
• Hydraulic lines and tanks
• Pipelines for fluids and hot gases