- Joined Feb 27, 2021
It is safe for solid state relay to use for ATS then mechanical contactor ?, and it is need's derating for single phase motor load ?
No... It's safe for use solid state relay alone, without mechanical contactor ?, for client with 100a 1 phase, they want cheap transfer switch... and solid state relay is cheap here, even 3 phase 100a is available in market, and solid state relay is controlled by PLC, also PLC is powered by battery and battery is charged automatically, 12v 10ah batteryYes, it's OK to use a SSTS (Solid State Transfer Switch) to switch a ATS (Automatic Transfer Switch) which is mechanical. If the ATS is driving a motor load it should be rated for the load stall current. That assumes your ATS is an automatic transfer switch. While I see no need for it yes, it can be done that way. Most motor starters are rated by the motor horsepower and come in single and poly phase designs including thermal overload protection. They also come in open frame and enclosed versions. You choose based on your specific application.
|Thread starter||Similar threads||Forum||Replies||Date|
|M||Protecting a SSR (Solid State Relay) From Overcurrent/Short Circuit - With PTC Resettable Fuse?||Power Electronics||14|
|D||Solid State Relay Design For 24VAC||Analog & Mixed-Signal Design||5|
|N||Question about a Thermal Gradient Ring for Research in Rats||Homework Help||12|
|PID Controlled Peltier Heating and Cooling||Automation, Robotics & Control||36|
|B||Safe forward voltage on an optical solid state relay?||General Electronics Chat||5|
|Protecting a SSR (Solid State Relay) From Overcurrent/Short Circuit - With PTC Resettable Fuse?|
|Solid State Relay Design For 24VAC|
|Question about a Thermal Gradient Ring for Research in Rats|
|PID Controlled Peltier Heating and Cooling|
|Safe forward voltage on an optical solid state relay?|
by Jake Hertz
by Jake Hertz