i-STS ( static Transfer Switches ) units employ solid-state thyristors (Silicon Controlled Rectifers) which means there are no moving parts. This allows for a faster switching time of less than a quarter of an AC cycle with higher reliability, making our units far superior to their relay based counterparts. To avoid the dangers of parelleling power sources, all switching is break-before-make, where the break is so small that it
ensures there will be no disruption to the operation of your connected equipment. Unlike relay based units that break and make anywhere on the power/voltage curve, all changeovers occur at zero current (zero power) where the load demand at that point is minimal. The inferior relay types often provide high transient voltages during the change over as a consequence
i-STS Manufacturing we have developed a unique range of Static Transfer Switches from the 10 Ampere Rack Mounted type to free standing units in excess of 2500 Amperes. All of our units offer a full range of Key Features such as intelligent microprocessor control, small physical size, robustness and reliability.

The Model A is the starting point for our range of static transfer switches, all of which employ solid-state thyristor (SCR) switching. The refned design delivers high reliability at exceptional value,
all ftting into a compact 1RU rack mount. The front panel features an simple and easy-to-use LED mimic  status and load indicator.
Available options
• 16 or 32 Amp current capacity
• Input isolator switches optional
• Optional I/O confgurations
Key Features
• Small 1RU Design
• 2 pole, single phase
• Passively cooled
• IP rated LED mimic decal
• One touch transfers
• Visual and sound alarm
• Incoming source isolators optional
• Preferred source selection

The Model B is smallest of the three phase units, with a compact size of 2 RU. The B2 features a hot-swappable power module and integrated maintenance bypass allowing for continuous power during servicing. With up to 63A of current capacity, the B2 is ideal for those needing more power in a smaller rack mount package.
Key Features
• Small 2RU design
• Colour touch screen LCD interface
• One touch transfers
• Integrated maintenance bypass
• Hot socket feld replaceable power module
• Incoming source isolators optional
• Visual and sound alarm
• Integrated web server
• Remote operation
• High Level Interface - MODBUS, SNMP
• Email alerts
Available options
• 32 or 63 Amp current capacity
• 2-pole, single-phase
• 3-pole, 3-phase
• 4-pole, 3-phase
• IP rated decal interface optional

Fuse-less wall mount The Model C has a high power capacity catering for industrial installations of up to 250A. It includes a maintenance bypass option via a 5 x circuit breaker array.
Key Features
• Fuse-less design
• Space saving wall-mount design
• LED mimic decal with monochrome graphic LCD interface
• One touch transfers
• Integrated maintenance bypass
• Visual and sound alarm
• Integrated web server
• Remote operation
• High Level Interface - MODBUS, SNMP
• Email alerts
Available options
• 63 / 100 / 125 / 160 / 200 / 250 Amp current capacity
• 2-pole, single-phase
• 3-pole, 3-phase
• 4-pole, 3-phase
• Maintenance bypass via 5 x circuit breakers