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Thermal Overload Protector (SN-2)




We are a prime Manufacturers, Exporters and Suppliers of Thermal Overload Protector (SN-2). The Thermal Overload Protector (SN-2) offered by us is used to protect electric motor, battery pack and transformer by sensing both the current and temperature.

Construction
In the SN-2 design, the nickel-plated shell holds and protects the inner components against varnish penetration and mechanical forces. It is supported by a slug and a contact welded on the disc. The fixed contact is placed on the opposite nickel-zinc coated plated steel shell, location in combination with the optimum assembly operation. As the SN-2 is a metal device it may be necessary to insulate it from other conductive parts. An insulating sleeve is available on request. 

The SN-2 is designed to provide locked rotor and overload protection in a wide variety of motors for industrial applications. The heart of the device is the calibrated bimetal disc, responding to current and temperature changes. The operating principle of the SN-2 is both simple and effective. A current flows through the resistive bimetal disc. When a fault condition occurs, the increased current and shell temperature heats up the bimetal disc which snaps and opens the contacts. The contacts close again automatically as the device cools down to a safe running temperature. 

Construction
In the SN-2 design, the nickel-plated shell holds and protects the inner components against varnish penetration and mechanical forces. It is supported by a slug and a contact welded on the disc. The fixed contact is placed on the opposite nickel-zinc coated plated steel shell, location in combination with the optimum assembly operation. As the SN-2 is a metal device it may be necessary to insulate it from other conductive parts. An insulating sleeve is available on request. 

The SN-2 is designed to provide locked rotor and overload protection in a wide variety of motors for industrial applications. The heart of the device is the calibrated bimetal disc, responding to current and temperature changes. The operating principle of the SN-2 is both simple and effective. A current flows through the resistive bimetal disc. When a fault condition occurs, the increased current and shell temperature heats up the bimetal disc which snaps and opens the contacts. The contacts close again automatically as the device cools down to a safe running temperature. 

Features
  • Compact design
  • Robust and reliable
  • Provides mounting flexibility
  • Large current range
  • Cadmium free contacts

Nickel–plated shell holds and protects inner components against varnish penetration and mechanical forces. Option of basic device with leads and other integrated quick connectors or automated connection systems. Available in a variety of configurations including leads, insulating sleeves, and more.

Applications
The SN-2 is motor protector for 125 and 250 Volt appliance applications including :
  • Pumps
  • Motor Wingings
  • Transformer windings
  • Washing machines
  • Clothes dryers
  • Dish washers
  • Dish washers
  • Vacuum cleaners
  • Fans
  • Battery chargers
  • Lighting transformers
  • Microwave ovens

The SN-2 is built to meet almost any application in these fields. Customized lead wire configurations are available on request. The SN-2 can be fitted in the best possible mounting due to its small size. Utiliti Control has build the SN-2 motor protector to meet almost all the needs for protecting the motor against short circuit, locked rotor, overload.

Rating :
  • Rated Voltage : 125VAC / 250VAC
  • Dimensions : 23.3 x 10.5 x 5.1 mm (including terminals)
  • Current Range : 5–12 A (less than 10 s trip–time)
  • On-winding Motor Protector
    • S type : Standard
    • HSS type : Improved sealing (hotmelt)
  • Cycle Life : 10.000 cycles / 12 A / 250 Vdc (see data sheet)
  • Temperature Ranges
    • Open Temperature : 45oC to 160oC
    • Tolerance : ±5C
  • Vibration : Military standard 202E/204C, category D (20g peak)
  • Corrosion : 14 days according to IEC 60730-1
  • Contact Rating Motor Protector : Rating depends on the application and its test results

Qualification :
  • EN60730-2-9 thermal cut–out
  • EN60730-2-2 thermal motor protector

Selection Code
  • SN-1/NC(8)/80(5)/65(10)/XLPE/70/HSS
  • Heat-resistant rubber, neoprene, silicone rubber
  • Teflon in 18 gauge stranded wire in standard incremental lengths of 4" to 36".

(Teflon is a Trademark of E. I. Dupont de Namers and Co.)
Other gauges and lengths available upon request.

Declarations to EN60730-2-9


Purpose of the controlThermal cut-out
ConstructionIncorporated, non-electronic
Degree of protectionIP00
Terminals for external conductorsFor internal conductors only
Temperature limits of the switchhead170oC
PTI of insulation materialsPTI 175
Method of mountingInserting, clamping, bracketing or the like
Operating timeFor continuous operation
Types of actionType 2C (T - open)
Type 1C (T - close)
Reset characteristicAutomatic
Extent of sensing elementWhole control
Control pollution degreeDegree 2

Declarations to EN60730-2-2


Purpose of the controlThermal motor protector
PTI of insulation materialsPTI 175
Method of mountingInserting, clamping, bracketing or the like
Type of actionType 3C
Reset characteristicAutomatic
Control pollution degreeDegree 2


Selection Code Chart and Specifications

Selection Code Chart and Specifications

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