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TESTING PLAN |
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Testing plan is divided into three types of tests. |
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Routine tests |
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To be carried out by the manufacturer on all the units, for which a routine test certificate will be supplied. |
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Acceptance tests |
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To be carried out on capacitors, the number of which is to be decided between the customer and the manufacturer mutually. |
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Type tests |
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Normally a certificate for the type test will be provided. However we can offer type tests on single unit at extra costs and with previous arrangement. |
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Routine Tests |
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A |
Visual examination |
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B |
Sealing test at Tmax Degree C + 10 Degree C for 1 Hours. |
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C |
Test for capacitance. Capacitance will be measured directly across a Schering bridge. |
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D |
Voltage test between terminals.
Note : On subsequent repeated testing, test voltage applied will be equal to 80% of the above value. |
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E |
Voltage test between terminals and container.(Applicable for 2 terminal capacitors only.) An A.C. voltage equal to 2.15 times rated voltage will be applied between all the terminals together and body for the period of 10 seconds. A Substantial sinusoidal as voltage having a frequency between 15 to 100 Hz shall be applied. The capacitor will withstand this test. |
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F |
Test for efficacy of discharge device (If Provided) A D.C. Voltage equal to 1.41 times the r.m.s. rated voltage of capacitor will be applied along with its discharge resistance. The voltage will be switched off and time will be measured to reduce this voltage upto 50 volts. This time will be less than 1 minutes for capacitors of rated voltage upto and including 600 V and 5 minutes for capacitors of rated voltage above 600 volts.. |
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G |
Measurement of tangent of dielectric loss angle ( Tan delta) This will be measured across the Schering bridge at rated voltage. |
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Acceptance tests |
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All the routine tests are offered as acceptance tests. |
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Type tests |
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Following type test are identical to similar tests under routine test |
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A |
Measurement of capacitance. |
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B |
Voltage test between terminals and container |
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C |
Voltage test between terminals |
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D |
Measurement of tan delta. |
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E |
Thermal stability test will be carried out as per clause 8.2 of IS:9251. |
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F |
Measurment of capacitance as a function of temperature.as per clause 8.5 of IS:9251 |
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G |
Self Healing Test as per clause 8.6 of IS:9251 |
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I |
Tesr for internal discharge device as per clause 8.8 of IS:9251 |
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