How to calculate the pressure of PVC steel hose?

Up to and including 5 kv cross-linked polyethylene insulating power Cable ultra-low Frequency (0.1 HZ) overvoltage withstand Test methods Very – Low – Frequency Wave (0.1 HZ) Voltage Test for described.properties power Cable Rared Up to 35 kv 1 scope this standard stimulates the ultra-low Frequency (0.1 HZ) after the pressure Test as running means of running status of cross-linked polyethylene insulated power Cable Test method. 2 the provisions contained in the following standards shall be referenced by reference to the provisions of this standard. In the publication of this standard, all versions are valid. All standards will be revised and all parties using this standard shall explore the possibility of using the latest version of the following standards. DINVDE0276? 1001 has been laying of rated voltage U0 / U for 6/10 kv, 12/20 kv and 18/30 kv PVC insulation, insulation described.properties or oiled paper insulated power electricity test pressure test specification JB3373 large high voltage ac motor stator insulation IEEESrd. 433 ultra-low frequency high voltage large rotary motor insulation test DL/T596 power equipment preventive test procedures 3 ultra-low frequency (0.1 HZ) summary of withstand voltage test role ultra-low frequency (0.1 HZ) withstand voltage test is to identify cross-linked polyethylene insulated power cable insulation strength of the direct method, can be used as judgment parameter of cross-linked polyethylene insulated power cable can be important reference basis to continue running. The ultra-low frequency (0.1hz) withstand test is a destructive test. In the test, it is recommended to test the insulation resistance of the test cable by using the 10000v meter, and record the test results. Ultra-low frequency (0.1 HZ) pressure test equipment generally consists of 0.1 HZ output voltage generator, test instructions, shows that the output voltage waveform or frequency of peak voltage and current meter, record test time timer, protect the resistance, length of not less than 30 meters special flexible connection cables and other components. The test equipment must have reliable overcurrent or overvoltage protection function, starting function and built-in discharge function. 4 test equipment of 4.1 4.1 HZ voltage generator 0.1 HZ voltage generator, provide a sine or cosine square wave voltage, can continuous booster, should be less than 1%,