Craftsmans electric manufactures uninterruptible power supply systems[ups] with a range including microprocessor based online ups systems, offline ups systems, mosfet based online ups systems and cvt based online ups. The ups system provided by craftsmans supply uninterruptible power supply by double conversion technology from 150 vo low input voltage to 270 v high input. The company can also supply wider input voltage ranges on order. The ups system has a power factor correction circuit to minimise power bills and a high frequency igbt based pwm circuit for accurate frequency and waveform control under varying line and load conditions. This unique feature of the ups systems provide backup power during power outages; give protection against errors due to frequency variations, voltage variations and micro interruptions; emi and rfi protection is acquired and also give adequate protection against lightning. The company also supply thyristor controlled charger with features voltage control and current limit and over/under voltage protection. The ups system can be applied for protection of computers, networking equipment, textile electronics, medical equipment, communication systems and data acquisition systems. The craftmans ups systems is available with technical specifications like 150-270 volts ac input voltage, single phase; 220 v ±1% ac output voltage; 500 va to 20 kva power range and 30 minutes to 8 hours battery back-up time.
