American Rotary AD 20 Instrukcja obsługi i instalacji - Strona 12
Przeglądaj online lub pobierz pdf Instrukcja obsługi i instalacji dla Konwerter mediów American Rotary AD 20. American Rotary AD 20 15 stron. Adx-cul cnc/heavy duty rotary phase converters
Drukuj stronęADDITIONAL NOTES ON WIRING:
It is important to have adequate single-phase electrical service. The actual single phase current
that will flow through the converter is approximately 1.73 times the three-phase current. The
National Electric Code requires 2.5 times the three-phase load current to allow for starting current
and a margin of safety. This is a good conservative calculation to determine your single phase
branch circuit wire size and breaker size.
The power needed to run the phase converter is very small and is negligible in figuring out the
power required. The power required is calculated based on the load only.
Wire can never be sized too large, but too small of wire can impede performance and even keep
the converter from starting properly. Increase wire size one size for every 50 feet of run and round
up.
3.0 OPERATION & MAINTENANCE
3.1 STARTING & STOPPING
American Rotary phase converters are started with either a push button or rotary switch. If the
phase converter operates with a push button, momentarily press the start button to start the unit
and momentarily press the stop button to stop it. If the phase converter operates with a rotary
switch, turn the switch to the start position to start. The starting sequence is automatic, so the
switch only needs to be momentarily turned to start and then released. The switch should return to
the run position on its own. Stopping the phase converter is done in a similar manner, by turning
the switch to the stop position. As with most electrical equipment, frequent stops and starts are
harder on the rotary phase converter than steady operation. The rotary phase converter is
extremely low cost to operate at idle (with no three-phase load), and this is preferable to a high
level of stopping and starting. If your load situation dictates that the rotary phase converter must
be started and stopped frequently, call us about our On Demand with Delay Off kit for optimum
product operation.
On AI and ADX American Rotary units, there is a red light on the panel. This red light shows when
the phase converter is engaged in start-up mode. This light should not be on for more than 5
seconds. If this red light is on for longer than 5 seconds, shut off the phase converter. Start-up
mode should not be engaged for extended periods at a time. There are two points in which the light
will turn on: when starting the phase converter and when starting a load. If the light is engaged for
longer than 5 seconds after starting a load, shut off the load first and then the phase converter.
3.2 CHECKING VOLTAGES
Measuring voltage is the easiest way to test to see if the phase converter is working properly. When
voltages are balanced on the three 3-phase lines, currents are balanced. Measuring current is
more difficult as there are different types of current present in the running phase converter
such as regenerative current.
Voltage Measurements:
Measure L1 to L2
This is your single phase voltage as supplied from the utility. To get the
(T1 to T2)
most accurate voltage measurements, make sure that the converter is on
and the load is applied.
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