HPS-iSTS-R

DIN Rail Mounted Static Transfer Switch 1Ph/2 Pole 16A max

A Static Transfer Switch (STS) provides your critical load or single cord (single supply), equipment with an alternative supply source, thus increasing and improving power reliability and availability. The HPS- iSTS-R is a 2 pole, single phase DIN Rail mount STS that suits 35mm x 7.5mm rail. Both the active conductor and the neutral are switched. Thyristors are used to undertake the switching process. These are many times faster and more reliable than their electromechanical equivalents.

The iSTS continuously monitors the supply sources and should the presently connected supply fail or degenerate or become useable, the critical load is automatically and transparently transferred to the alternate source. This switching process is undertaken as a break before make transfer. The break in the supply transition is so short that it is not seen by the critical load. This is preferable to make before break (or overlapping) changeover because when the two supplies are different and connected together large and unpredictable currents would flow between the sources degenerating both supplies and therefore the supply to the critical load.

In case of a downstream fault, the iSTS will not transfer the fault to the alternate supply even if the voltage is adversely affected. Once the fault current has cleared the iSTS will resume normal operation protecting the critical loads from voltage disturbances, (10 second settling time).

Main Features

  • Advanced Automatic Transfer Switch – ATS – functionality
  • 16A, 1-phase, 2-pole
  • Built-in transient voltage protection
  • RCD site compatibility
  • Safe asynchronous source transfers
  • Very high MTBF (>500,000 hours)
  • Manual and automatic transfers selection
  • Preferred source selection
  • Visual and sound alarms
  • Bi-colour LED mimic and load indicator
  • One voltage-free general alarm contact

Typical Applications

  • Buildings
  • PLCs
  • CNCs
  • Robotics
  • BMS
  • Workshop IT
  • Servers
  • Work Stations
  • Warehouses

Specifications Table

Current rating1Ph: 16A max
Voltage rating115V or 230V±10%
Type1-Phase/2-Pole
Frequency50Hz and 60Hz, ±10% – Auto detection
Transfer typeBreak-Before-Make zero current transfer by Thyristors / SCR
Break timeSynchronous: up to ¼ cycle – Asynchronous: 12.5ms
MTBF>500,000 hours
IsolationNo source insolation
DisplayLED mimic decal with load indicator
InterfacePreferred supply selection, Source transfer selection and Alarm cancel button
ContactOne voltage free general alarm indicator
Input optionUp to 4mm2 terminals
Output optionUp to 4mm2 terminals
DimensionsL215 x D60 x H90mm
Weight0.7kg
Temperature0 – 35°C
IP ratingIP30
DetectionDigital: <1ms
Asynchronous break timeDynamic break time
Loading0 – 100% @35°C ambient
Device ratings56ARMS , 1200V, 300A for 1 cycle
Overload @40°C ambient32A for 30s 100A for 2 cycle
63A for 1s 300A for 1 cycle
Fault current setting250% peak with load fault transfer inhibit
ProtectionExternal DIN rail mounted fuse isolator 10x38mm – 16/20A
Power factorNo practical limit
Max THDV10% – Max allowable source voltage distortion
Crest factor3 : 1
dV/dt max800V/μs
CoolingRedundant fans
Humidity @40°C ambient5 – 95% non-condensing
Regulatory approvalsIEC 62310-1,2,3 – IEC 60950 – IEC 61000-6-1,2,3,4 – CE – RCM – UL Capable – RoHS
Standard warranty24 months offsite repair or replacement policy

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