What is STS in data centers?

5.4.1 Static Transfer Switch (STS) An STS is a switch that uses a semiconductor to divert the data center load between the utility source and emergency power. It is controlled by a sensor circuit.

How to set up a manual transfer switch?

Connect the generator to the transfer switch Move the generator outside and start it up The UTS will automatically detect power and adjust the circuits as necessary. When power is restored, disconnect your generator and turn it off. Be sure to review your owner’s manual thoroughly before use.

What do you need to know about power transfer switch?

The connection created between a generator, transfer switch, electrical panel, power cord, and power inlet box is called a power transfer system. You will want a professional electrician doing the installation due to all the wiring involved. The best way to size a manual transfer switch is to match it to the largest outlet on your generator.

How do you connect a generator to a transfer switch?

Turn off all the circuits in the transfer switch. Connect the generator and transfer switch using a gen cord. Start the generator and let it warm up outside. Flip the main breakers in the transfer switch from “Line” to “Generator” power. One at a time, turn on the circuits you want to power, ensuring the generator doesn’t get overloaded.

Do you need to pull a meter for a transfer switch?

For a retrofit, if the main disconnect is part of the service entrance panel, it’s necessary for you to pull the meter (with electric utility permission) in order to de-energize the service entrance conductors. Then, reroute them into the transfer switch, wire in the generator, and refeed the service entrance panel.

What do you need to know about transfer switches?

In its most basic form, a transfer switch for a 120/240V single-phase service is simply a double-pole, double-throw switch of proper ampere rating with a middle off position (Fig. 1). By design, it is a physical impossibility for both power sources to supply the load simultaneously, unless, of course, that is the intent.

How many circuits can a manual transfer switch connect?

This means any appliance on that circuit will be powered. Many manual transfer switches are NEMA rated for indoor or outdoor installation. Your generator’s power output will determine the number of circuits you can connect. Most 5,000 watt generators can restore power to six circuits. Larger generators can power 10 circuits.

Can a manual transfer switch be connected to a generator?

This means any appliance on that circuit will be powered. Many manual transfer switches are NEMA rated for indoor or outdoor installation. Your generator’s power output will determine the number of circuits you can connect.

How to turn off a manual transfer switch?

1 Turn off the main breakers in the transfer switch back to “Line” power. 2 Turn off the generator 3 Disconnect any cords