S.D. Electronics :: TELECOM POWER

TELECOM POWER >> Inverters

STI1250M Modular Switchmode Inverter

Features

The STI1250M inverter forms the basis for a modular inverter system capable of providing up to 6 kVA of power. The STI1250M pluggable inverter modules are inserted into cage assemblies that are available to hold anywhere from one, two, three or four inverter modules (the M2.5 two-module cage assembly with inverters is pictured above). Inverter modules run in a parallel, load-sharing (+10% among units) mode.

All the advantages of switch mode technology with reliability built in for continuous duty online operation.
Parallelable for increased power or redundancy.
Extremely low audible noise - suitable for manned work environments.
Digital LED true RMS output current meter on inverter modules.
Cage assemblies have built-in automatic bi-directional fast "ETS" transfer scheme to commercial power backup.
Systems may be configured for redundant or non-redundant online operation.
19" or 23" rack mountable (brackets supplied).
Local and grouped extended alarms including overload to accurately monitor load conditions.
Low distortion, true sine wave output.
Telecom grade input filtering.
High efficiency.
Short circuit, over/under voltage and thermal protection.
120VAC / 60Hz and 220VAC / 50Hz outputs available

Technical Specifications

Electrical Specs:

Output Waveform:	True sine wave, <3% THD
Output Power:	1500VA at 0.5 PF; 1250W at 1 PF
Load/Line Regulation:	5% combined
Frequency:	50 and 60 Hz available
Input Voltage:	48VDC nominal; 42-60VDC range
Input Current:	27A nominal at full load & 54 VDC input; soft start to limit inrush
Battery Feedback Noise:	<30 dBrnC
Efficiency:	>87% from 50% to 100% full load
Protection:	Reversed DC polarity protection; DC input low-voltage shutdown; output short circuit protection, power limiting and voltage foldback with auto-recovery; magnetic circuit breakers for AC and DC input, dual fan cooling; over-temperature shutdown.
Metering:	Digital LED output current, true RMS Amps; four sets of front mounted tip jacks for input/output voltage and current.
Indicators and Alarms:	Front panel LED's for Inverter On, Overload, Inverter Fail and AC Mains Fail. Cage assemblies also provide grouped extended alarms.
Audible Noise:	<40 dBA at 1 metre from the unit.
Approvals:	UL & ULC, FCC Class A subpart 15J compliant, CE on 220/50 Hz model.

Mechanical Specs:

Operating Temperature:	0 - 50 Degrees Celsius (dual cooling fans).
Operating Humidity:	0 - 95% (non-condensing).
Operating Altitude:	0 - 10,000 feet maximum before derating.
Dimensions:	17" W x 3.5" H x 15" D (432 x 89 x 381 mm)
Weight:	21 lb. (9.5 kg). (per module)
Mounting:	"M Series" rackmount cage assembly
Finish:	Black matte powder coat.

M Series Cage Assembly Specifications

	M1.25	M2.5	M3.75	M5.0
Maximum number of inverter modules	1	2	3	4
Maximum output watts	1250	2500	3750	5000
Maximum output VA	1500	3000	4500	6000
Dimensions	17.29” W x 19” D x 5.25” H	17.29” W x 19” D x 10.75” H	17.29” W x 19” D x 14” H	17.29” W x 19” D x 21.7”