Piller APOTRANS AT 125–1600 A – static transfer switch (STS)
Static Transfer Switches, UPS
Fields of application
PILLER APOTRANS AT 125–1600 A – high-current static transfer switches (STS) that automatically switch critical loads to a backup source when the main source deviates from the norm or disappears. Designed for data centers, industry and other critical infrastructure where a backup source is required up to the load, in new and existing power systems.
Features:
Current range from 125 to 1600 A
Fuse-free: large thyristors with high short-circuit resistance simplify protection coordination
Switching typically within 3 ms per phase; safely switches even 180° out-of-sync sources
Redundant controllers, triple redundant power supplies, redundant fans
Continuous thyristor control and adaptive short-circuit detection on the load side
Inrush current control protects the transformer during switching
3 or 4 pole versions; cabinet or open frame for integration into PDUs and distribution boards
Programmable switching windows, voltage and frequency tolerances; interface with UPS systems
SPECIFICATIONS
AVAILABLE MODELS
DOCUMENTS
SPECIFICATIONS
Manufacturer
PILLAR
Series
APOTRANS AT
Device type
Thyristor static switch (STS)
Rated current
125–1600 A
Piles
3 or 4 poles (4 poles: neutral conductor switching in TN-S systems)
Construction
Fuseless
Switching time
Typically 3 ms per phase, phase selective switching
Unsynchronized sources
Safe switching with 180° phase shift
Reservation
Redundant controllers, triple power supplies, duplicated fans
Thyristor control
Continuous; short circuit and open circuit detection with signal; active and inactive thyristors checked during each cycle
Short circuit protection
Adaptive detection; the switch does not turn on the source in the event of a short circuit on the output
Ignition current control
Limits transformer inrush currents during manual and automatic switching
Programmable parameters
Switching windows, input voltage tolerance, input frequency tolerance
Interface with UPS
External signals adapt operation to UPS status
Housings
Cabinet or open frame
Cable entry
From above, below or both sides
Access
Full service from the front
AT 1600 A
Four-pole cabinet with isolating and bypass switches and electromagnetic bypass switch interlock
Dimensions and weight
According to the specific model (specified by the manufacturer)
Applications
Data centers, industry, critical infrastructure
Additional equipment available
Open frame version for integration into distribution panels and switchboards
3 or 4 pole version according to system requirements
Cabinet version with isolation and bypass switches
Integration into isolated, distributed or "system + system" reservation schemes
