(ALL POLYPROPYLENE)

*TESTING PLAN*
	Testing plan is divided into three types of tests.
	Routine tests
	To be carried out by the manufacturer on all the units, for which a routine test certificate will be supplied.
	Acceptance tests
	To be carried out on capacitors, the number of which is to be decided between the customer and the manufacturer mutually.
	Type tests
	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.

Routine Tests
	A	Visual examination
	B	Sealing test at 80⁰C + 5⁰C for 3 Hours.
	C	Test for output and capacitance. Current will be measured at rated voltage and KVAR will be calculated from the same. OR Capacitance will be measured directly across a Schering bridge and KVAR will be calculated from same. Unbalance between phases will not exceed 5%.
	D	Insulation resistance test. Insulation resistance will be measured on a microampere ammeter across a 500 volts stabilised, ripple-free D.C. supply between all the terminals together and container and the value so measured will not be less than 50 MW . Note : 1) When one terminal is body itself, this test does not apply. 2) Readings with hand Megger are not reliable.
	E	Voltage test between terminals. A D.C. Voltage Vt = 4.3 rated voltage (Vo) will be applied for 10 seconds between terminals. The capacitor will withstand this test. Alternatively an A.C. Voltage Vt=2.15 times rated voltage (Vo). Will be applied for 10 seconds between terminals. The capacitor will withstand this test. Note : On subsequent repeated testing, test voltage applied will be equal to 80% of the above value.
	F	Voltage test between terminals and container. An A.C. voltage of 3 KV, 50 Hz will be applied between all the terminals together and body for the period of 60 seconds. The capacitor will withstand this test. Note: 1) When one terminal of capacitor is connected to body, this test does not apply. 2) For Type test, the duration will be 1 minute & for routine test the duration will be 10 seconds.
	G	Voltage test between terminals and container for capacitor banks This test will be similar to the (F) above except that all the fitting like voltmeter, instrument transformer or any other phase to earth apparatus may be disconnected during this test.
	H	Test for efficacy of discharge device 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 minute.
	I	Measurement of tangent of dielectric loss angle ( Tan delta) This will be measured across the Schering bridge at rated voltage. and the value, exclusive of discharge resistance. It will be less than 0.001 or 1 watts/KVAR. Output test will be repeated at the end of above series of tests.

Acceptance tests
	All the routine tests are offered as acceptance tests.

Type tests
	Following type test are identical to similar tests under routine test
	A	Test for output and capacitance.
	B	Voltage test between terminals and container (for capacitor unit)
	C	Voltage test between terminal and container (for capacitor bank)
	D	Voltage test between terminals
	E	Measurement of tan delta.
	F	Thermal stability test will be carried out as per clause 15 of IS:2834.
	G	Tangent of dielectric loss angle at elevated temperature. Tan delta during the thermal Stability test at the voltage of the thermal Stability test will not exceed 0.001. This value does not include losses in discharge resistance.
	H	Partial discharge test.
	I	Capacitance discharge test. A Capacitor unit will be charged to D.C. voltage at 1.41times rated R.M.S. voltage and discharged through a gap situated as close to the capacitor as possible without a current limiting resistance. Five such discharges will be carried out with an average interval of 2 minutes between two shots. The unit has to withstand a routine voltage test between terminals after this test. Capacitance before and after this test will not vary by more than 2%. Tan delta before and after this test will not vary by more than 0.001.