Workshop on Safety Tests for Electrical Products Cairo, Egypt 3 – 4 December 2014 Abnormal heat test Dean Zekic Higher market inspector Croatian Ministry of economy

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Heating Appliances and their surroundings shall not attain excessive temperatures in normal use. Appliances and their surroundings shall not attain excessive temperatures in normal use. Compliance is checked by determining the temperature rise of the various parts under the conditions, according to the type of tested product. Compliance is checked by determining the temperature rise of the various parts under the conditions, according to the type of tested product. Positioning of appliancePositioning of appliance Positioning of measuring unitsPositioning of measuring units Power suply conditionsPower suply conditions

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Measuring elements Temperature rises are measured by fine-wire thermocouples. Temperature rises are measured by fine-wire thermocouples. must have minimum efect to testing results must have minimum efect to testing results Surrunding area of tested appliance is made of Dull black- painted plywood 20 mm thick with Teromcouples positioned on back of small blackened disks Surrunding area of tested appliance is made of Dull black- painted plywood 20 mm thick with Teromcouples positioned on back of small blackened disks

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Measuring elements Temperature rises of windings are calculared acording to change in resistance before and after test Temperature rises of windings are calculared acording to change in resistance before and after test

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Heating During the test, the temperature rises are monitored continuously and shall not exceed the predetermined values. During the test, the temperature rises are monitored continuously and shall not exceed the predetermined values.

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December CEI-IETA measuring equipment

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December CEI-IETA measuring equipment

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Heating-Measuring

Heating measuring

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Abnormal operation Appliances shall be constructed so that as a result of abnormal or careless operation, the risk of fire, mechanical damage impairing safety or protection against electric shock is obviated as far as is practicable. Appliances shall be constructed so that as a result of abnormal or careless operation, the risk of fire, mechanical damage impairing safety or protection against electric shock is obviated as far as is practicable.

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Abnormal operation Unless otherwise specified, the tests are continued until a non-self- resetting thermal cut-out operates or until steady conditions are established. Unless otherwise specified, the tests are continued until a non-self- resetting thermal cut-out operates or until steady conditions are established.

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Appliances with heating elements Measuring of rising temperature of caracteristic points, with: Measuring of rising temperature of caracteristic points, with: Suplied voltage which provide 0,85 times rated power inputSuplied voltage which provide 0,85 times rated power input Suplied voltage which provide 1,24 times rated power inputSuplied voltage which provide 1,24 times rated power input Temperature limits are short circutedTemperature limits are short circuted

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Appliances incorporating motor The appliance is operated under stalled conditions by : The appliance is operated under stalled conditions by : locking the rotor if the locked rotor torque is smaller than the full load torque;locking the rotor if the locked rotor torque is smaller than the full load torque; locking moving parts of other appliances. locking moving parts of other appliances. The appliance is supplied with rated voltage for degined time acordint to the type of product The appliance is supplied with rated voltage for degined time acordint to the type of product During the test, temperature of the windings shall not exceed specified values During the test, temperature of the windings shall not exceed specified values

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Abnormal operation During the tests the appliance shall not emit flames, molten metal, or poisonous or ignitable gas in hazardous amounts and temperature rises shall not exceed the values shown During the tests the appliance shall not emit flames, molten metal, or poisonous or ignitable gas in hazardous amounts and temperature rises shall not exceed the values shown The appliance shall not undergo a dangerous malfunction, and there shall be no failure of protective electronic circuits if the appliance is still operable." The appliance shall not undergo a dangerous malfunction, and there shall be no failure of protective electronic circuits if the appliance is still operable." After the operation or interruption of a control, clearances and creepage distances across the functional insulation shall withstand the electric strength test, the test voltage, however, being twice the working voltage. After the operation or interruption of a control, clearances and creepage distances across the functional insulation shall withstand the electric strength test, the test voltage, however, being twice the working voltage.

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing - Iron  19.4 i – HRN EN i HRN EN : Appliance is examinated at rated power with temerature cuting devices bridged.  19.4 i – HRN EN i HRN EN : Appliance is examinated at rated power with temerature cuting devices bridged. During the testing period apliance must not emit flame, melted metal or poison or flamable gases in dangerous quantities, and temerature rising should not exced prescribed values During the testing period apliance must not emit flame, melted metal or poison or flamable gases in dangerous quantities, and temerature rising should not exced prescribed values

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing - Iron During this testing, termostat is short overbridged (sumulation of termostat malfunction). 50 seconds after start of testing, from iron started to relies white gass. During this testing, termostat is short overbridged (sumulation of termostat malfunction). 50 seconds after start of testing, from iron started to relies white gass. After 65 seconds non self reseting termal cut out 240'C cut the circuit, and gass stoped After 65 seconds non self reseting termal cut out 240'C cut the circuit, and gass stoped to reliess smoke after 280 seconds from beggining of test. Outcome of gass which was created during testing would fill up a volume 100m³. to reliess smoke after 280 seconds from beggining of test. Outcome of gass which was created during testing would fill up a volume 100m³.

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing - Iron

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing - Iron

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing – Contact grill Abnormal operation Abnormal operation The tests of 19,4 and 19,5 are only aplicable to: The tests of 19,4 and 19,5 are only aplicable to: Contact girls (HRN EN /A1:2004) Contact girls (HRN EN /A1:2004) The appliance is tested under conditions specified in clause 11. Any control that limits the temperature during the test of clause 11 is short circuited. The appliance is tested under conditions specified in clause 11. Any control that limits the temperature during the test of clause 11 is short circuited. During the tests the appliance shall not emit flames During the tests the appliance shall not emit flames

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Testing – Contact grill During test the appliance emited flame During test the appliance emited flame

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Test – ventilation heater

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Test – ventilation heater

TAIEX Workshop on Safety Tests for Electrical Products; Cairo, Egypt, 3-4 December Test – ventilation heater

Thank you for your attention! Dean Zekić, dipl. ing. el High market inspector Republic of Croatia Inspection directorate in economy Sector for market inspection Regional unit – Service inspection in Split Mob: