STM250 is a sub-rack inverter system integrating TM250 inverter module and TJ20 module. It is a truly redundant system offering functions of pure sine wave inverter, bypass transfer switch and monitor into one 19”3U sub-rack.
Single module is hot plug design which make the maintenance an easy job without interruption to your critical load.
For 100Vac/110Vac/120Vac , max 4KVA is available.
● 9”3U ● Pure Sine Wave, with THD<3% ● N+1 redundant configuration ● Hot plug in technology ● Max efficiency up to 90% ● DC-AC isolation improving system security ● Built in bypass transfer switch ● Quick transfer time 5-8ms ● Built in monitor module ● Voltage adjustable 230Vac (200-240) or 110Vac (100-120) ● Working mode selectable (AC priority or DC priority ) ● RS485 or RS232 communication port ● Relay dry contact ● Built in SNMP card – optional