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Series Operation
7–2 445-0089-01-01
Designing a Series System
System Overview
Series operation refers to a specific wiring configuration that allows you to
connect two PROsines in a way that produces two 120V phases which are
synchronized to produce 240V. This is commonly referred to as a “120/240Vac
split-phase” supply or “240V single-phase with a center-tap neutral” and is the
same as the utility connection to most houses. This series system can power both
120Vac and 240Vac single-phase loads. Two PROsines connected in series can
provide up to 4kW continuous power to almost any combination of 120V and
240V loads.
System Components
A two-unit series operation system requires the same components that a single
PROsine system requires. In many cases, however, two components are required,
some are applied differently, and a 10 foot series sync cable is required. See
Figure 7-1.
Important:
Each PROsine is still limited to 17A continuous. For example, you cannot
put 9A of load on one phase and 25A of load on the other.