Geotextile Wear Tester [Usage]: In order to ensure accurate testing results, specimens must be tested under the standard atmospheric conditions specified in GB6529. Step 2: Place the calibrated specimen on a stationary upper plate and secure it with clamps at both ends of the plate. The abrasive material should be placed on a movable lower plate and also secured with clamps at both ends. Step 3: Align the upper plate with the lower plate so that the specimen is properly positioned over the abrasive. Step 4: Apply a total load of (6 ± 0.01) kg onto the upper plate, including the weight of the plate itself. Step 5: Turn on the power switch and set the required number of wear cycles. The tester will begin the wear test, operating at a frequency of 90 cycles per minute. It will perform 750 cycles at this frequency or until the sample is worn through. If the sample is worn out before completing the set number of cycles, record the actual number of cycles and the extent of wear. In case of any abnormalities during the test, press the stop button, clear the counter, and prepare for the next test. Step 6: If the specimen or abrasive slips within the clamps, discard the current sample and retest after adjusting the setup. Replace the abrasive after each test. Conduct tensile tests separately on both the reference and the worn samples according to CB/T3923.1. Step 7: Calculate and present the results: For each test group, calculate the percentage of strength loss with an accuracy of 1% using the formula: Strength Loss Rate (%) = [(FA - FB) ÷ FA] × 100 Where: FA = Reference fracture strength, in Newtons (N) FB = Fracture strength of the worn sample, in Newtons (N) Additionally, calculate the average strength loss rate and the coefficient of variation among the five test groups. Step 8: Test Report: The report should include the following details: a) The standard number being used b) Sample identification as per GB14798 c) Direction and front/back orientation of the sample d) Average strength loss rate in percentage e) Coefficient of variation of strength loss f) Any deviations from the standard procedures, such as changes in cycle count or load g) Any abnormal conditions encountered during the test, such as unexpected wear After the test is completed, clean the equipment thoroughly for future use.

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MCCB with Earth Leakage Protection(ELCB) TRE Series

TREF, MCCBs with earth leakage protection

Independent power supply with build-in power source,directly draws power from the incoming end to avoid the risk of protection function failure caused by external power supply failure.
● Overload protection
● Short circuit protection
● Isolation
● Earth-Leakage Protection
● Used in residential building, non-residential building, industry, energy and infrastructure

Earth-leakage protection is a residual current protection based on current measured by a rectangular sensor encompassing the three phases of the three phases and neutral.

mccb with earth leakage protection,circuit leakage protection,Earth Leakage Breaker,3phase Elcb,Elcb 200a

ZHEJIANG QIANNA ELECTRIC CO.,LTD , https://www.traner-elec.com