supplying equipment to electrical dpt - 2 dc rectifier unit 50a servo controlled rectifier variable from 200 v to 250 v dc. input three phase 400 v ac, servo controlled with double wound step down transformer suitable for three phase 400 to 230v before rectification with 1.over load protection 2.phase sequence detector 3.voltmeter& ammeter 4.indicator for input and output 5.auto / manual, housed in cubicle made of sturdy and perforated metal sheet cover, providing free cross ventilation with wheel for easy transportation 3 m i ammeter 0-1 / 2a ( dual range ) portable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 4 m i voltmeter n0-25 / 50v ( dual range ) nportable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 5 m c voltmeter n0-25 / 50v ( dual range ) nportable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 6 m i voltmeter n0-300 / 600v ( dual range ) nportable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 7 loading inductor 3 f 415v / 15a variable inductor or inductive load - 3 f variable chock coil mounted on massive platform and all terminals are brought out. for laboratory purpose 8 m c ammeter n0-1 / 2a ( dual range ) nportable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 9 m c voltmeter n0-150 / 300v ( dual range ) nportable meters housed in bakelite case with knife edge pointer & antiparallax mirror. laboratory purpose. n 10 digital tachometer for rpm mearsurment 60to100000rpm. photo / non contact type 5 digits. 11 three phase auto transformer 10a, 415v / 0-470v ( phase to phase ) portable, closed type, ncontinuously variable auto transformers having a single layer copper winding on a torrodial core of high grade cold rolled grain oriented silicon steel. on one face of the copper winding along the periphery a special durable contact surface of silver coating is made, on which the carbon brush slides ( over the silver surface ) smoothly. any desired voltage with in the maximum range can be obtained by adjusting the position of the brush by rotating the control knob. the calibrated dial reed approximately the out put voltage at no load, when the input is at its rated value. laboratory purpose. n 12 rheostats 45 o / 5 a wire wound sliding rheostats are wound with best quality ni / cr or ni / cr alloy resistance wire on vitreous enameled drawn steel tubes, fitted with phosphorous bronze or self lubricating copper graphite contact , portable laboratory purpose. n 13 rheostats 300 o / 5 a wire wound sliding rheostats are wound with best quality ni / cr or ni / cr alloy resistance wire on vitreous enameled drawn steel tubes, fitted with phosphorous bronze or self lubricating copper graphite contact , portable laboratory purpose. n 14 dc power supply 0-300 v / 2a, with digital display for voltage and current, high quality load regulation, negligible ripple factor, protection against short and over load, with course and fine control. 15 four pole mnx 12 contactor 415v, with one no auxilary contact. 415v nvc 16 mk1 three pole contactor 415v. 17 star delta electronic timer 18 add on block conatact 1no+1nc 19 over load relay 6 - 10 a 20 415v, push button green ( no ) 21 415v, push button red ( nc ) 22 electronic ballast 250v 23 electric ballast 250v