Electrical Appliance Testing Equipment

Cord Grip Tester

Approx Price: Rs 45,000 / Unit 

The effectiveness of the cord grip of an electrical or electronic appliance is determined by subjecting the cord to a specified pulling force for a specified number of times. Immediately afterwards, the cord is subjected to a specified torque. The action of these two forces shall not cause the cord to get shifted in the cord grip and the conductors in the terminals by more than a specified distance.

The GlobeCord Grip Tester for electrical and electronic appliances consists of an arrangement to apply the specified pulling force, and an arrangement to apply the specified torque, on the cord of the appliance under test.

Related specifications

IS 302 - 1979 : General and Safety Requirements for Household and Similar Electrical Appliances

Clause 25 : Supply Connections and External Flexible Cables and Cords

IS 616 – 1981 : Safety Requirements for Mains Operated Electronic and Related Apparatus for Household and Similar General Use

Clause 16 : External Flexible Cords

BS EN 60335 (Part 1) – 1995 : Specification for Safety of Household and Similar Electrical Appliances

Part 1 : General Requirements

Clause 25.15 : Supply Connections and External Flexible Cords

Cord Guard Flexing Tester

Approx Price: Rs 95,000 / Unit 

The cord coming out of an electric iron is subjected to a large number of flexing cycles about its junction with the iron when it is moved to-and-fro while being used. Because of this movement the conductors and the insulation over them are subjected to repeated pulling and release or to flexing which cause them to fail. The intensity of these actions on the cord can be reduced by providing a cord guard at the point where the cord comes out of the iron. Suitability of such cord guards in increasing the operational life of the cord is determined by means of a cord guard flexing test.

 

In this test the iron is held in a vertical plane with the cord coming out along a vertical axis. A dead weight is suspended from the cord and the iron is oscillated through an angle of 45° on either side about an axis tangential to the outer surface of the part in which cord guard is secured. This operation is performed ten thousand times, after which the iron is shifted so that the flexing takes place along a plane at right angle to the one in which flexing took place earlier. After flexing for another ten thousand cycles, the iron is checked for damages to the cord guard and its flexible cable or cord.

 

RELATED STANDARDS

 

IS 302 (Part 2 / Section 3) – 1992 : Safety of Household and Similar ElectricalAppliance

 

Part 2 : Particular Requirements

 

Section 3 : Electric Irons

 

IS 366 - 1991 : Electric irons - Specifications

 

IS 6290 - 1971 : Specification for Steam Irons

 

Endurance Tester

Approx Price: Rs 75,000 / Unit 

The ability of an electric iron to give a sufficiently long working life is determined by supporting the iron under test on three metallic legs over a metal plate, pressing a thermocouple junction at the mid-point of its sole plate, and operating it at 1.15 times its rated input for 200 operating hours in cycles consisting of 11 hours On period and 1 hour Off period. The average temperature of the sole plate during this period is maintained at about 200°C for thermostatically controlled irons and between 205°C and 260°C for ordinary irons, the latter by appropriate cooling if necessary. At the end of the above test period, the iron is examined for its electric strength and exposure of any live parts caused by breakage or distortion of the enclosure.

The GLOBE Endurance Tester for electric irons consists of a control panel to provide single-phase supply at 1.15 times the rated input to the iron under test in cycles of 11 hour On period and 1 hour Off period, and a suitable support for placing the iron under test on during this period.

 

RELATED SPECIFICATION

 

IS 366 - 1991 : Electric Iron - Specification

 

Clause 16.1 : Endurance Test

Ball Pressure Apparatus - IEC

Approx Price: Rs 75,000 / Unit 

External parts of thermoplastic insulating materials, deterioration of which might cause the electrical appliance to become unsafe, shall be sufficiently resistant to deformation at elevated temperatures. Compliance is checked by subjecting plastic parts made of insulating materials to the ball pressure test.

In this test the test specimen is placed over a rigid metallic stand with its upper face lying in a horizontal plane. A spherical indentor of 5 mm diameter is pressed against it under a force of 20 N. The assembly is maintained at a specified temperature for a period of one hour. At the end of this time period the diameter of impression produced by the ball on the surface of the material is measured with the help of a traveling microscope. This diameter shall not be greater than 2.0 mm for the material under test to be considered acceptable in this test.

The GlobeBall Pressure Apparatus consists of a hardened and ground carbon steel ball held in a suitable adopter. The adopter carries a stirrup arrangement to apply the specified load on the test specimen placed on a flat surface.

A metallic stand having a flat horizontal platform for placing the test specimen on is also supplied with the equipment.

Related standard

  • IS 302 –1979 : General and Safety Requirements for Household and Similar Electrical Appliances
  • Clause 30 : Resistance to Heat
  • IEC 60335.1-2001 : Household and similar electrical appliances - Safety – Part 1: General requirements
  • Clause 30 : Resistance to Heat
  • IEC 60695.10.2-2001: Fire Hazard Testing
  • Part 10-2: Guidance and test method for the minimization of the effect of abnormal heat on electro technical products involved in fires – Method of testing products made from non-metallic materials for resistance to heat using the ball pressure method.

Earthing Connection Tester

Approx Price: Rs 75,000 / Unit 

In all electrical appliances where there exists a likelihood of any accessible metal part becoming live in the event of any insulation fault, adequate provision has to be made to connect such parts permanently and reliably to an earthing terminal or termination within the appliances, or to the earthing contact of the appliance inlet. Any such connection shall be robust enough to bear a likely short circuit current without getting damaged or burnt out. Also, the resistance of such earthing paths shall also be within a specified limit.

 

The Globe Earthing Connection Tester has an arrangement to give a specified high current at a low voltage and an ammeter to measure the current and a voltmeter to measure the voltage drop in the earthing path, thus enabling determination of its resistance. It consists of a variac to give a variable voltage, a step down transformer to provide the specified current at a low voltage, an ammeter to indicate the current passing through the earthing path, and a voltmeter to indicate the voltage drop in the earthing path.

 

Related standards

 

  • IS 302 – 1979 : General and Safety Requirements for Household and Similar Electrical Appliances


  • Clause 27.5 : Provision for Earthing

 

  • IEC 60335.1 – 2001 : Household and Similar Electrical Appliances Part 1: General Requirements

 

  • Clause 27.5 : Provision for Earthing.

 

Impact Tester

Approx Price: Rs 50,000 / Unit 

Mechanical strength of various parts of electrical accessories / appliances / luminaires is determined by subjecting them to blows of specified impact energy by means of either a spring hammer type or a pendulum type impact tester.

 

The advantage of spring hammer type impact tester is that is can be used in any position, provided that there is enough room to apply it correctly. Also there is no constrain on the test because of the size, weight, or bulk of the accessory / appliance / luminaire under test. Its main disadvantage is that separate hammers are needed of conducting tests under different impact energies.

 

The GlobeImpact Tester (Spring hammer type) consists of three main parts: the housing, the striking element, and the release arrangement.

 

The housing is cylindrical in shape and serves to support the striking element and the release arrangement. It has a rigid PVC release cone of specified mass at its front end. The release arrangement is activated by pressing the cone against the body of the accessory / appliance / luminaire under test.

 

Related standards

 

  • IS 302 – 1979: : General and Safety Requirements for Household and Similar Electrical Appliances

 

  • Clause 21 : Mechanical Strength

 

  • IS 10322 (Part 4) – 1984 : Specification for Luminaires

 

  • Part 4 : Methods of Tests

 

  • Clause 3.4 : Measurement of Leakage Current

 

  • IS 1534 (Part 1) – 1977 : Specification for Ballasts for Fluorescent Lamp

 

  • Part 1: For Switch Start Circuit

 

  • Clause 9.10: Test for Mechanical Strength

 

  • IEC 60068 (Part 2 / Test 75) – 1997 : Envioronmental testing Part 2 : Tests

 

  • Test 75 : Hammer Test
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