1.Overview
Y-701B controller is an independent type ATS controller.It detects abnormal conditions ofgrid parameters(overvoltage,undervoltage,phase loss,over frequency,underfrequency,misphase sequence,etc.)and then automatically control the transferswitch (TSE)transfer according to a predetermined mode of operation to the suitablepower supply,to ensure the continuous power supply on the load side.

2.Features
2.1 Microcontroller-based measurement and control system with true RMS calculation for thebasic parameters of the power grid;
2.2 Adjustable transfer delay and operation modes for various applications;
2.3 LEDs indicate the operational status;
2.4Equipped with programmable input and output interfaces;
2.5 Passive fire signal;
2.6 RS-485 communication interface;
2.7 Protection level:IP50.

3.Operating Environment
3.1 Installation site:The altitude should match the TSE-specified usage altitude.
3.2 Pollution level:Level 3.With no explosive hazards,corrosive gases,liquids,or conductivedust that may damage metal components or insulation in the surrounding air.
3.3 Ambient air temperature:-5°C~+40℃,with an average temperature within 24 hours notexceeding+35℃.
3.4 Humidity:When the maximum temperature is +40°℃,the relative humidity should notexceed 50%.Higher humidity is permissible at lower temperatures(e.g.,up to 90%at+20℃).Special measures should be taken for occasional condensation due totemperature changes.
3.5 If these conditions above are not met,please consult our company for further solutions.

4.Controller Function Introduction