ST ( SF/D ) product range

The TECNED ST (SF/D) Static Transfer Switch series is available with single phase input /output and

current ratings from 25A to 500A.

The ST (SF/D) series can be supplied as a 1-pole or 2-pole static switch to meet customer

requirements for safety and reliability. Standard features include source select, auto source and

source lock, input V metering, mains S1-S2 out of tolerance alarm and general alarm with potential free contacts.

The ST (D) includes a digital controller with LCD display that shows the systems current state of

operation and system values, allows setting of system parameters and includes event and alarm logs.

Option list ST (SF/D

  • Extend to 12x PFC (NO/NC) with LED
  • Mimic diagram with Individual fuse/breaker failure indicator
  • Fan failure alarm
  • 3-position mechanical bypass
  • Up to 6 (DIN 96) meters / cabinet

Tecned ST (SF/D) Specifications

Input Voltage 110/120/200/220/230/240/277V, (2W+E)
Voltage tolerance 180 / 264 Vac (Ph-N)
Frequency Frequency 50Hz / 60Hz
Frequency window 2-10% adjustable
Output Transfer type Break before make
Transfer methods Automatic / Manual / Remote
Transfer time < 4 msec (S1-S2 synchronized)
< 11 msec (S1-S2 not synchronized)
Overload 150% for 1 min. / 200% 10 seconds
Power Factor 0.6 lag to 0.9 lead
General Ambient temperature -20 to +70 °C storage / -10 to +40 °C operation
Altitude above sea level 1000 m
Enclosure Aluzinc frame / powder coat RAL 7035
Standards Safety IEC/EN 62040-1 / EMC 55011
Conformity IEC 60146 / CE-Label

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