Heaters & Moulds

Thermal Overload Protector Model ISQB is the best suited thermostat for over temperature and burnout protection of Heater Moulds.

Heater Thermostat – Model ISQB

Description of Thermostat/Thermal Overload Protector

Our research and engineering team has developed Model ISQB Thermostat for over temperature protection of heater moulds. This thermal overload protector has a body made of solid machined aluminum, which provides the thermal overload protector with greater strength and better heat sensing capacity. This thermostat can be mounted on to the heater mould with two screws. This thermal overload protector contains a snap action bimetal strip and a beryllium copper switching blade which work on the principle of the over center mechanism. The normal snap action disc thermostats have delayed restart and the trip temperature drifts downwards, but due to the over center mechanism, our thermostats have quick restart characteristic and the trip temperature remains stable, even after long usage. The contacts are made of solid silver which give it a long life. All the internal components are spot welded and the lead wires are Teflon insulated which can withstand high temperature. The body of the thermostat is double sealed with high temperature resistant epoxy adhesive, so it is not affected by varnish, fumes, dust, etc. This thermal overload protector is available in Normally Open (N.O.) or Normally Closed (N.C.) contacts.

Special Features:

  • Solid Machined Aluminum Body
  • Better heat sensing capability and greater strength
  • Easily mountable with two screws
  • Solid silver contacts for long life of 1,00,000 operations
  • Available in Normally Open (N.O.) or Normally Closed (N.C.) contacts
  • Snap action bimetal thermostat
  • Double sealed body with Teflon insulated lead wires
  • Available in any temperature from 50C to 160C

Application of Thermostat/Thermal Overload Protector

Thermostat Model ISQB functions as a heater mould over heat protection device, in case, the main temperature controller fails. It has two grooves, one on each side, so that it can be screwed on to the heater mould with two M3 screws. This thermal overload protector needs to be screwed on to a flat surface near the heater so that it can sense the temperature. The thermostat is connected in series with the heater for low amperes (up to 500W heaters). For heavy loads, use a contactor or relay. If there are multiple heaters, then one thermostat needs to be connected with each heater. When the heat builds up, the thermostat will sense the temperature rise and trip off, thereby, disconnecting the heater from the mains. This trip temperature is not adjustable and is calibrated at the time of manufacturing. It is specified by the customer and it can be different for different types of heater moulds. Please consult us complete technical guidance.

 Voltage Up to 250VAC or 24VDC
 Continuous Load Up to 8 AMPS
 Maximum Load Switching Capacity 30 AMPS
 Contacts Configuration Available with Normally Closed (N.C.) contacts
 Switching Action SPST Normally Closed (N.C.) contacts which open or close with a snap action at a  preset temperature and disconnect the heater supply to the mould from the mains.
 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 The thermostat/thermal overload protector will automatically restart upon cooling and will automatically restore power supply to the heater. Adequate precaution must be exercised in heater mould protection applications where automatic thermostat/thermal overload protector restart can cause injury due to overheating.
 Fitting or Mounting The thermostat/thermal overload protector can be screwed with two M3 screws on to any flat surface of the mould so that it can sense the temperature rise.
 Connections Thermostat/Thermal Overload Protector can be connected in series with the heater. For multiple heaters, one thermostat has to be connected to each heater. For heavy loads, use a contactor or relay.

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