Schneider XW E-Panel Manual

XW E-Panel installation manual
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continuous breakers for the generator input, utility input and AC input/output bypass switch. Most
generators come with a UL489 branch circuit output breaker. All main distribution/service entrance
panels such as Square D utilize UL489 branch circuit rated breakers. The AC breakers supplied in
the E-Panel are supplementary protection listed to UL1077. These breakers are used as disconnects
or switches, but not as branch circuit devices. Branch circuit breakers made for a residential service
entrance panels are typically thermal breakers. These breakers are not allowed under NEC
guidelines to normally carry more than 80% of their rating. That means a 60 amp Square D QO stab
in breaker may only be sized for 48 amps continuous power. The MidNite breakers are a
hydraulic/magnetic variety and are allowed under NEC guidelines to carry full rated current. The
XW E-Panel comes with 60 amp hydraulic/magnetic breakers.
Bus bars are provided for easy hook up from a generator and or the utility and also for an AC sub-
panel. The AC input and output busbars are also the ideal place to connect lightning or surge
arrestors. The output busbar must not be connected to the main distribution panel in a utility
connected installation. The main utility connected distribution panel will go dead during an outage.
Only circuits connected to the AC output busbar (sub-panel) will have power during a power
outage. Do not try to back feed a utility connected distribution panel from the output of the inverter.
The above flow diagram shows AC current flow direction for a battery
backed up grid tie system with a generator. DC current flow is not
shown. Note that all loads powered by the inverter must be connected to
the AC sub-panel on the right.
The above flow diagram shows AC current flow in an off-grid system. DC current flow is not shown.
This is a pictorial explanation of the main AC circuits. AC input1, AC input2 and AC output.
In a utility connected system, only the loads connected to the AC output Sub-panel will have power during an
outage. The main service entrance loads will have no power.