General Description

The ASINOTIMER STS-936E-150A is a three-phase automatic transfer switch (ATS) with multiple protection and monitoring features, designed for automatic switching between three power sources: public grid, inverter (solar panels), and generator. The device ensures continuous power supply to consumers by automatically selecting the available source within set parameters and providing full protection against voltage, current, and temperature fluctuations.

Operation

• Works with adjustable priority among the three sources (L1, L2, L3)
• Normal configuration: L1 - public grid (main), L2 - inverter / solar panels, L3 - generator

Main Features

• Automatic switching between 3 power sources
• Adjustable source priority (L1 / L2 / L3)
• Overvoltage protection
• Undervoltage protection
• Overcurrent protection
• Temperature protection
• ON/OFF timer
• Adjustable transfer delay
• Energy meter (kWh)
• Monitoring of voltage, current, and frequency

Connections

• Inputs: N neutral, L1 main source (grid), L2 secondary source (inverter), L3 backup source (generator)
• Output: N + L to consumer

Technical Data

• Voltage: 230 / 400V AC
• Frequency: 50 / 60 Hz
• Current range: 150A
• Number of phases: 3 phases + N
• Measurement: DIN rail
• Display: digital LED
• Operating temperature: -25°C ~ +50°C

Applications

• Homes with generator and solar panels
• Hybrid photovoltaic systems
• Commercial buildings
• Backup power systems
• Electrical automation

Important Note

The device functions as a smart ATS but maintains power stability: it does not automatically return to the main source if the active source is stable.