230VAC Standalone DC-AC/AC Inverter With Internal Automatic Bypass
The TSI Bravo ST solution secures AC loads at 230 Vac from a 24Vdc, 48Vdc, 110Vdc & 220Vdc infrastructure. Additional AC input is used under normal conditions to achieve an overall conversion efficiency of 96%. In the event of a grid failure, it automatically switches to the DC to secure the loads.
In addition to this, this solution includes a bypass that feeds AC loads directly from the grid if there is a problem in the system. The modules included are hot swappable for ease of maintenance. By adding an additional module, you can extend the solution up to 5kVA.
The TSI BRAVO ST will bring the securitization of your critical load’s power to the next generation!
Hot-swappable Inverter with automatic by-pass
Hot-swappable inverter module requiring only seconds to be replaced
Automatic by-pass engagement in case of inverter failure
Switching back to inverter automatically when the system is ready
24V, 48V, 110V & 220VDC input voltage options to 230VAC
Output Power Options
Standalone model 5000VA
Standalone model 2500VA, with redundancy
Standalone model 2500 VA, without redundancy
BRAVO – ST is a compact inverter with automated by-pass solution providing a pure sine wave AC supply. In conjunction with a DC Power system, it provides an excellent AC backup solution. It uses the latest inverter technology, providing superior energy efficiency in a compact size.
The “Twin Sine Inverter” (TSI) technology allow 3 operations mode (EPC double conversion AC to AC, ONLINE DC to AC from battery and o line by-pass to AC). The automatic bypass to AC allows easy hot plug module replacement without stopping the load giving highest AC output availability and avoid the need of an external manual by-pass.
Applications
Power Stations
Transformation and Distribution Substations
Manufacturing Processes
Oil & Gas Production Facilities
All business critical applications and all types of AC loads. The solution is design for highest AC output availability. Both inverter modules and by-pass are hot-swappable which ensures low Mean Time to Repair (MTTR), reduction in service costs
Dry contacts on shelf / Standard USB port and MODBUS on T2S, optional : Candis Display / Candis TCP-IP
Remote on / off
on rear terminal of the shelf via T2S
TABLE SERIES
Model
Input Range VDC
Input Range VAC
Output VAC
Power VA
ST-24 / 230
19 – 35 VDC
150-265VAC
230VAC
1500VA/3000VA
ST-48 / 230
40-60 VDC
150-265VAC
230VAC
2500VA/5000VA
ST-110 / 230
90 – 160 VDC
150-265VAC
230VAC
2500VA/5000VA
ST-220 / 230
170 – 300 VDC
150-265VAC
230VAC
2500VA/5000VA
OPERATION MODES
On-line Mode
DC is the primary source of supply whilst Mains (AC) works as the secondary source of supply. Switching time between DC input and AC input is 0ms (source transfer).The power delivered by the DC source (usually a battery , but it could be any other type of DC generator) is converted to provide regulated and transient free power to the load. In case of short circuit at the load side, the boost is automatically, timely and energized for a specific duration to trip downstream protective devices.
Safe Mode
Safe mode uses DC as primary source of supply while Mains (AC) is in standby. Mains (AC) is normally disconnected through internal inlet relay and is only connected when down stream clearance is required (boost) or if DC is unavailable.
The transfer between DC and AC results in typical transfer time of 10ms. Typically the safe mode is used in extremely harshed environments such as railways. Under such conditions it provides extra isolation against disturbances carried by the Mains.
EPC-mode
Mains input (AC) is the primary source whilst DC works as backup.
The TSI is designed to operate on Mains on permanent basis and to deliver output voltage conditioned with low THD. There is no physical difference on the output sine wave whether the source is AC (or) DC. If the Mains is out of tolerance or goes down, the converter seamlessly switches to DC and the converter operates in “Back-up mode” (Switching time back and forth is 0 ms). As soon as the Mains returns in to valid range, the EPC mode is automatically resumed.
The EPC mode offers higher efficiency (up to 96% depending on the model) without compromising the purity of the output sine wave.
Mix Mode & Walk-in-mode
Under some circumstances DC and AC source can be combined. The sequence is defined by a user selectable set of parameters start, control and exit are fully automatic. A specific example of Mix-mode is the Walk-in mode where the transfer from DC source to AC source is ramped up within a fix and adjustable period of time.
Setting for Walk -in -Mode and Mix Mode can be made through the T2S supervisor configuration file.
By Pass Mode
The automatic by pass is engaged in case of following condition
AC input is present and 1 BRAVO TSI Module failure if no redundancy configured OR only one module installed OR
AC input is present and 2 BRAVO TSI module failure if one module redundant has been configured.
