Installing double throw switch is a
safe and appealing option that allows you to sit back and relax, while the
switch functions on its own.
Two types of transfer switches
- Manual
- Automatic
Manual versus automatic
Manual transfer switch has to be
activated by users. After ascertaining that utility outage is a momentary power
loss, the homeowner starts the engine manually. The engine has to be allowed to
speed up and stabilize. Ultimately, the lever of the transfer switch is thrown
into generator position.
The basic transfer device, when
total load supplied by regular source (utility or diesel generator) is double
pole and double throw switch. Inadvertent connection or back feed of two
sources is not possible.
ATS or automatic
transfer switch constantly monitors power supplied by the utility
company. Grave power quality issues or fluctuations, which may come before an
outage triggers a start signal to the generator. As soon as the backup voltage
and the frequency become stable, the transfer switch turns the generator.
Once the utility power gets
restored and displays no fluctuations for pre-determined time period the switch
returns back to its original position. After getting cooled out the generator
shuts down automatically. These actions take place without any human
intervention.
To switch the manual transfer
switch, homeowner will need to go to the entrance panel, even in the dark.
Before switching backup power, users need to shut off the breakers for branch
circuits that are not essential to decrease the load to match generator
capacity. In case the branch circuits are not studied properly, before shutting
them, overload to the generator can be caused.
Fortunately, automatic load transfer
switch is designed to provide alternating power to those branch circuits that
are chosen in advance.
It does not matter, if you use
automatic or manual transfer switches. The main feature to consider is the
generators capability of supplying necessary connected load.
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