1. Susol MCCB -40 ℃ Derating Test Report 1) TD160/TS250 -40 ℃ Verification of Temperature Correction 2) TD160/TS250 -40 ℃ Temperature Correction Table 3) TS400/TS630/TS800 -40 ℃ Cold-Resistant Characteristic 4) TS400/TS630/TS800 -40 ℃ Temperature Correction Table 5) Susol electronic MCCB -40 ℃ Characteristic Verification - EMS, ETM, OCR A Type 6) Conclusion L/V SOLUTION TEAM Report Date : 2012. 11. 5. C o n t e n t s

2. * Testing Photo 1 1. TD160/TS250 -40 ℃ Verification of Temperature Correction -Susol MCCB TS250 Temperature correction at -40 ℃ was verified in accordance with IEC60068-2-1 standard, test of operation characteristic with 105~130% over current. -Correction ratio were calculated in order to implement over current test of TS250 at -40 ℃. The test was successful and we have selected final correction ratio based on the test result. - First temp. correction increase ratio (based on room temp.) : -0.5 %/ ℃ (-40 ℃ correction ratio 140% ) - Second temp. correction increase ratio (Finalized) : -0.9 %/ ℃ (-40 ℃ correction ratio 172%) 발생하여 2 차에 온도보정 상승비를 - 적용온도보정 상승비 200% single pole over current test 105-130% over current Test * TS250 -40 ℃ Over current test result Attachment of temperature sensor at terminal This part is covered with heat insulating material to protect from radiant heat caused by convection current

3. * Testing Photo - Since correction ratio of TS250 and TD160 are identical at room temperature, TD160 is also tested with TS250 correction ratio. As a result, no problem found in over current test. - No problem found in over current test of every ampere frame at min/max rated current. 105-130% 과전류 검증 * TD160 -40 ℃ Over Current test result * IEC60068-2-1 test standard - Specific heat dispersion MCCB sample was used in the test - 96 hours of full saturated time, IEC Standard, was applied to the test * Tester Opinion - It seems correct to keep the surrounding temperature constant and carry on test after the product temperature stabilized in surrounding temperature. -It is found that sustainment time after stabilization does not affect the characteristic of product. -The main purpose of assignment is not to develop product for extremely low temperature but to develop correction ratio of surrounding temperature in order to check Susol MCCB’s over current characteristic at -40 ℃ * Tester Opinion - It seems correct to keep the surrounding temperature constant and carry on test after the product temperature stabilized in surrounding temperature. -It is found that sustainment time after stabilization does not affect the characteristic of product. -The main purpose of assignment is not to develop product for extremely low temperature but to develop correction ratio of surrounding temperature in order to check Susol MCCB’s over current characteristic at -40 ℃ 1 1. TD160/TS250 - 40 ℃ Verification of Temperature Correction

4. 2 2. TD160/TS250 Temperature Correction Table -The final correction ratio was selected between the two linear section of temperature rise ratio 0.5 at the room temperature and 0.9 at the extremely low temperature -Correction ratio of existing product at room temperature (10~40 ℃ ) is same and correction ratio at low temperature increases in the shape of exponential function (Temperature correction ratio of OQC outgoing inspection standard and CB construction data is clearly stated between 10~40 ℃ ) Temperature Correiton Ratio TABLETemperature Correction Ratio Curve

5. * Testing Photo 3. TS400/TS630/TS800 - 40 ℃ Verification of Temperature Correction -Verification was implemented by applying Identical selection method with TD160/TS250. -The correction ratio was selected after comparing the difference between correction ratio of TD160/TS250 at room temperature and correction characteristic of TS630/TS800 TS400N -40 ℃ Over Current test * TS400, TS630, TS800 -40 ℃ over current test result TS630N -40 ℃ Over Current Test TS800N -40 ℃ Over Current Test No problem found in the test

6. 4. TS400/TS630/TS800 Temperature Correction Table -Correction ratio of existing product at room temperature (10~40 ℃ ) is same and correction ratio at low temperature increases in the shape of exponential function (Temperature correction ratio of OQC outgoing inspection standard and CB construction data is clearly stated between 10~40 ℃ ) Temperature Correiton Ratio TABLETemperature Correction Ratio Curve

7. * Testing Photo 5. Susol Electronic MCCB -40 ℃ 200% Over Current Test - 200% over current test of ETS, ETM, OCR A type was implemented at -40 ℃ and no problem found. -TS1600 was not able to apply 200% over current test due to not enough size of constant temperature oven and other facilities. 0.5% ground fault operation test was implemented instead. -TS1600 OCR PS type was excluded from the test due to below standard specification of LCD parts. * Susol electronic MCCB -40 ℃ Over current test result TS250N ETS23 200% over current testTS630N ETM33 200% over current testTS1600N AG1 ground fault trip test

8. 6. Conclusion - -40 ℃ Correction ratio was selected for all AF of Susol MCCB and verified 105~130% over current characteristic in accordance with IEC60068-2-1 standard. - Correction ratio of Trip parts at -40 ℃ was verified through Design of experiment and additional research of core technology regarding designing correction ratio to surrounding temperature is necessary. -This test covers only 105~130% over current characteristic at -40 ℃. Mechanical endurance was not able to be tested due to not enough facility in PT&T.