Static Transfer Switch
The TECNED ST-D Static Transfer Switch series is available with single phase input /output 220/230 or 240Vac and current ratings from 25A to 500A.
The ST-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 input V metering, mains S1-S2 out of tolerance alarm and general alarm with potential free contacts and input/output fuse monitoring.
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-D
- Extend to 12x PFC (NO/NC) with LED
- Individual fuse failure indicator
- Fan failure alarm
- 3-position mechanical bypass
- Over temperature
Up to 6 (DIN 96) meters / cabinet
Specifications
| Input | Voltage | 2x 220/230/240 V + N |
| Voltage tolerance | 180 / 264 Vac (Ph-N) | |
| Frequency | 50Hz / 60Hz | |
| Frequency window | 2-10% adjustable | |
| Slew rate | 1-4Hz/sec (selectable) | |
| Output | Transfer type | Break before make |
| Transfer methods | Automatic / Manual / Remote | |
| Transfer time | < 4 msec (S1-S2 synchronized) | |
| < 10 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 |