ETA - asynchronous synchronous

ETA – Starting System for Synchronous and Asynchronous Motors

Advanced technology for synchronous and asynchronous motors
The ETA systems developed by SPIE Energotest are reliable starting and excitation systems designed for synchronous and asynchronous motors.

They feature a modular cabinet design, which—apart from the control system and thyristor exciter—also includes a starting system based on a resistor starter (alternatively eddy current or liquid-type starter).

Main features and benefits

• Asynchronous starting with inrush current limitation (Ir ≤ 2 × In) while maintaining nominal load torque
• Forced excitation during transition to synchronous operation and during stator voltage dips
• Stabilisation of motor operation and excitation current control in test mode
• Optional control system redundancy (single- or dual-channel versions) for maximum availability
• Comprehensive protection against:
  - starter failure
  - loss of excitation
  - rotor overload
  - ground faults

Integration and communication
ETA, similarly to ETS, enables integration with higher-level control systems via:

• RS485 (Modbus RTU)
• Ethernet (Modbus TCP/IP)

The system can be operated via a local operator panel or remotely using diagnostic software on an external computer.

Applications and references
ETA systems are successfully used in key industrial facilities, including:

• KGHM (ZWR Lubin, ZWR Polkowice)
• Lafarge Polska