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Solid-State Inverter

Wed, 02/21/2001 - 9:09am
Unipower Telecom's new INV2500 inverter achieves seven volt amperes per cubic inch. The unit produces 115 VAC at 2500 VA in a 2 U (3.5) high by 8.5 wide by 12 deep case. The INV2500 can be configured for 19 and 23 rack mount in either a single 2500 VA output or a dual 5000 VA solution.

The INV2500 produces a near perfect 60 Hz sinusoidal waveform from a 48 V source. Frequency stability is ± 0.1%, total harmonic distortion is less than 2% and efficiency is 90%. The input voltage range is 42 to 56 V, and the unit is fully isolated from the battery. Multiple INV2500 units can be paralleled for higher output power or for N An input circuit breaker turns the inverter on and protects the battery from input faults. An output breaker connects the inverter to the load bus. The inverter has a synchronization feature should the bus be live and facilitates quick disconnection in the event of an internal fault. The inverters have a high surge capability for starting into inductive loads like motors, but the quick-trip output breaker trips if power tries to flow back into a faulted inverter.

These solid-state inverters employ MOSFET and IGBT power switches together with high frequency, pulse-width modulation techniques to synthesize a precision regulated sinusoidal output. The fully isolated output can power any load from 90 to – 90 degrees phase angle. The INV2500 is self-cooled by two internal fans. Front panel LEDs indicate inverter status and Form C contacts are available on the back.

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