purchase of electrical equipments purchase of electrical engg equipment , three-phase rectifier unit input 3-phase 415v+ / -10%, 50hz+ / - 3hz ac output 220v, 100 a technology igbt / thyristor control.active air cooling output voltage constant on load with +or- 2 v copper wound transformer with 15% over-design for reserve capacity meters: dc voltmeter & ammeter, ac voltmeter with selector switch indications: dc on, ac on, dc failure warning lights controls: input 3 pole mcb, output trigger pulls on-off. protections: input mcb, dc circuit breakers certifications iso 9001 ? sheet metal enclosure with front and side opening doors for easy maintenance ? efficiency greater than 90% ? 5-year onsite warranty , digital storage oscilloscope analog bandwidth: 70 mhz sample rate: 1 gs / s record length: 20k points analog channels: 2 pc software for analysis of waveform spectrum analysis , function generator 1-channel 3 mhz function generator sine, square, triangular, ttl waveforms dds technology and fpga design frequency range: 0. 1hz ~ 3mhz high-frequency accuracy: 20ppm high-frequency stability: 20ppm max. frequency resolution: 100 mhz low distortion sine wave : -55dbc, voltage display