How to calculate the pressure of PVC lay flat hose machine?

PVC lay flat hose machine Voltage test Description Performance Power (0.1 Hz) Cable up to 35 kV 1 Scope This standard is a mode of operation of the test method for cross-linked polyethylene-insulated power cables operating mode, stimulated by ultra-low frequency after pressure test (0.1 HZ).
2 The PVC lay flat hose machine regulations in the following standards should be referred to in this standard. In the release of the PVC lay flat hose machine, all versions are valid. All standards will be modified and all parties using this standard should explore the possibility of using the latest versions of the following standards. DINVDE 0276? 1001 has been laid with a rated voltage U0 / U of 6/10 kv, PVC insulation, insulation description. Standard Specification for Pressure Test of JB3373 Large High Voltage AC Motors . 433 Ultra-low frequency high-voltage large rotating machinery insulation test DL / T596 Power equipment preventive test program 3 Ultra-low frequency (0.1 HZ) small junction withstand voltage test function Ultra-low frequency (0.1 HZ) withstand voltage test is to identify cross-connected polyethylene insulated power cable The direct method of insulation strength can be used as a judging parameter for XLPE insulated power cables. PVC lay flat hose machine can be used as an important reference for continued operation. The ultra-low frequency (0.1hz) withstand voltage test is a destructive test. In the test, it is recommended that the PVC lay flat hose machine use a 10000v tester to test the insulation resistance of the test cable and record the test results. PVC lay flat hose machine generally consists of 0.1 HZ output voltage generator, test instruction set, display output voltage waveform or frequency peak voltage ammeter, record test time timer, protection resistance, special flexible connection cable and other components with a length of not less than 30 meters . The test equipment must have reliable over-current or over-voltage protection functions, start-up functions and built-in discharge functions. 4 4.1 Test equipment 4.1 HZ voltage generator 0.1 HZ voltage generator, providing sine or cosine square wave voltage, continuous boost, should be less than 1%, the output voltage amplitude instability in its rated voltage, waveform distortion load capacitance capacity Not sized at 1.5uF. The test voltage waveform and frequency test voltage waveform are as follows:. A sine wave or b cosine square wave; the peak function of the sine wave should be within this range, the frequency should be within 0.1HZ The cosine square wave polarity time is not more than 2 milliseconds, the frequency should be within 0.1HZ range 4.3 Instrument current meter and voltage The accuracy of the table is equal to or higher than 1.5 and calibrated once a year. 4.5 Protection resistor The protection resistor value is not less than 100kΩ and the power is not less than 800W.