Automatic transfer switch GTEC series

for generator setsfor generatorsemergency power supply

Product overview
The automatic transfer switch GTEC monitors the primary utility and generator sets, starts the generator on utility failure and automatically transfers the load between utility and generator. Suitable for IEC emergency, standby and optional standby applications. The microprocessor control combines flexibility and dependable operation in a compact, cost-effective package.

PowerCommand® 40-2 transfer switch control

• Advanced microprocessor-based control for primary source and generator monitoring, automatic generator start and load-transfer functions for standby applications.
• Highly configurable customer inputs and outputs, adaptable to a wide range of application requirements.

Control features

• Display — backlit 4-line LCD text display with system status, contextual icons and alarms; plus multiple red/green status LEDs.
• Diagnostics and reporting — detailed event logs, advanced fault codes, alarm lists, power-event history and source statistics.
• Communication — Modbus RTU over RS485 (serial).
• Dry-contact relays — configurable volt-free digital inputs and outputs for maximum flexibility.
• PC and front-panel configuration — module configurable via PC software; selected settings adjustable on the front panel.
• Serviceability — plug-and-play integration with minimized point-to-point wiring and labeled terminals for easy access.

Key features

• Microprocessor control: Full-featured PowerCommand® 40-02 microprocessor control simplifies operation and customization via the front-panel display.
• Operating modes: Automatic transfer, open transition, open transition with sync-check monitor and programmed transfer lockout, training and test modes with or without load.
• Service access: Door-mounted controls and ample space with labeled connections for straightforward maintenance.
• Positive mechanical interlock: Mechanical interlocks prevent source-to-source connection through live contacts.
• Electromagnetic operator: Efficient electromagnetic actuation for reliable switching.
• Overlap-free transfer mechanism: Ensures a defined non-overlap transfer between sources.
• Continuous-duty rating: Designed for continuous operation up to nameplate ratings.
• Main contacts: Silver-alloy main contacts with multi-chamber arc extinguishing for 100% continuous-duty load transfer; routine maintenance not required.

Model designation and ratings
GTECA | 40, 63
GTECB | 100, 125
GTECC | 160, 200, 225, 250
GTECD | 350, 400, 500
GTECE | 630, 800
GTECF | 1000, 1250
GTECG | 1600, 2000

Technical specifications

• Control: PowerCommand® 40-02 microprocessor-based transfer switch control.
• Display: Backlit 4-line LCD text display; status LEDs (red/green).
• Communication: Modbus RTU over RS485 (serial).
• I/O: Configurable volt-free digital inputs and outputs (dry-contact relays).
• Transfer mechanism: Overlap-free; Sync-Check option available.
• Contact technology: Silver-alloy main contacts with multi-chamber arc extinguishing; rated for 100% continuous duty.
• Operating modes: Automatic transfer, open transition, training/test modes (with or without load).
• Current range (rated): 40 A to 2000 A depending on model variant.
• Enclosure / service: Door-mounted controls and simplified access for maintenance.