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MCCB -40℃ Derating Test Report

This report confirms temperature corrections, cold-resistant characteristics, and over-current tests for MCCBs at -40℃. It details verification methods and correction ratios for various MCCB models, ensuring compliance with standards.

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MCCB -40℃ Derating Test Report

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  1. Susol MCCB -40℃ Derating Test Report C o n t e n t s 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 electronicMCCB -40 ℃ Characteristic Verification - EMS, ETM, OCR A Type 6) Conclusion Report Date: 2012. 11. 5. L/V SOLUTIONTEAM

  2. 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. • - Firsttemp. correction increase ratio (based on room temp.) : -0.5 %/℃(-40 ℃ correction ratio140%) • - Second temp. correction increase ratio (Finalized) : -0.9 %/℃(-40 ℃ correction ratio172%) • 발생하여 2차에 온도보정 상승비를 -적용온도보정 상승비 * TS250 -40 ℃Over current test result * Testing Photo This part is covered with heat insulating material to protect from radiant heat caused by convection current Attachment of temperature sensor at terminal 200% single pole over current test 105-130% over current Test

  3. 1. TD160/TS250 - 40℃ Verification of Temperature Correction - 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. * TD160 -40℃ Over Current test result * Testing Photo * IEC60068-2-1 test standard 105-130% 과전류 검증 - 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℃

  4. 2. TD160/TS250 Temperature Correction Table Temperature Correiton RatioTABLE Temperature Correction Ratio Curve • 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 ℃)

  5. 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 * TS400, TS630, TS800 -40℃ over current test result No problem found in the test * Testing Photo TS400N -40℃ Over Current test TS630N -40℃ Over Current Test TS800N -40 ℃ Over Current Test

  6. 4. TS400/TS630/TS800 Temperature Correction Table Temperature Correiton RatioTABLE Temperature Correction Ratio Curve • 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 ℃)

  7. 5. Susol ElectronicMCCB -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 electronicMCCB -40℃ Over currenttest result * Testing Photo TS250N ETS23200% over current test TS630N ETM33200% over current test TS1600N AG1ground 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.

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