STS100: STS 25 – 100 A 1 phase

1-phase STS 25-100 A

Three-phase and single-phase static transfer switches for seamless load transfer in dual path power systems.
 

  • Rugged design and high reliability
  • Other ratings under request
  • Optimised system configuration for ICT applications
  • Customization for harsh environment and specific applications

 

Benefits:
  • Total control over load transfer: continuous source monitoring and robust management logic guarantee disturbance free power transfers to downstream critical loads
  • High overload capability: industrial derivation design providing high overload capability and high fault current management
  • Enhanced safety: redundant control logic and embedded backfeed protection for complete system and operator safety
  • Minimum maintenance costs: full front accessibility to all components and high material quality extremely reduce servicing

 

Features:
  • Continuous monitoring of voltage and frequency and automatic instant transfers for secure power switching without cross connection between sources
  • Short circuit transfer inhibit for robust load protection
  • SCR fault detection and backfeed protection for maximum upstream safety
  • True oversized neutral (2x In), redundant cooling with monitored fans and redundant (3×3) internal power supply in all system control boards for top product reliability in high availability applications
  • Dual manual bypass for complete source independence during maintenance
  • Full front access for easy maintenance
  • Bottom and top cable entry for maximum installation versatility
  • Comprehensive set of communication options for total remote monitoring of equipment operation
  • Fully compliance with all international product standards for maximum quality guarantee

STS100 technical data

Rating (A) 25 50 80 100
Dimensions WxHxD (mm) 820x1475x835 (custom layout on request)
Weight (kg) 150 190 220 265

Input

Connection type Hardwired 2w
Nominal voltage 110/115/120/220/230/240/277 Vac 1-phase
Voltage tolerance ±10% (up to ±20% on request)
Frequency and range 50/60 Hz, ±2 Hz (up to ±4 Hz on request)
Source harmonic voltage
content
unlimited (>20%THD transfer time ≤10ms)
Transfer phase angle 5° ÷ 30°

Output

Connection type Hardwired 2w
Nominal voltage 110/115/120/220/230/240/277 Vac 1-phase
Frequency 50/60 Hz
Transfer time ≤4 ms
Transfer mode Break before make, transfer inhibit on fault
Load power factor 1 to 0.3
Maximum crest factor 3:1
THD current fedback from load unlimited
Overload capacity 125% for 30 min, 150% for 10 min, 200% for 30 s, 2000% for 1 cycle,
4000% for ½ cycle
Efficiency (AC/AC) >99%

Connectivity and function extensions

Front panel Mimic LED panel and keyboard
Remote communication SPDT contact relay board;
optional: RS232 or RS485 serial port,
additional SPDT contact relay board
Optional function extension 2-poles configuration; plug-in circuit breakers;
panel builder execution; output distribution panels; isolation transformer

System

Protection degree IP 20 (other options)
Colour RAL 7035 (other options)
Installation layout Wall, back to back and side by side installation allowed
Accessibility Front access, bottom and top cable entry

Other features

Environmental

Operating temperature range 0 °C ÷ +40 °C
Storage temperature range -10 °C ÷ +70 °C
Altitude <1000 m
Audible noise at 1m (dBA) <62

Standards and certifications

Quality assurance, environment, health and safety ISO 9001:2008, ISO 14001:2004, GOST, BS OHSAS 18001:2007
Safety IEC EN 62040-1
EMC IEC EN 62040-2
Breakers IEC EN 60947-3
Transfer voltage limits IEC EN 62040-3 IEEE Standard 446
Protection degree IEC 60529
Marking CE