Generac Power Systems Stationary Emergency Generator, Руководство по установке

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The generator powers only designated loads that are grouped
together and wired into a separate emergency distribution panel.
The transfer switch is installed between the main distribution panel
(A) and the emergency distribution panel (E) (Figure 3.1).
The amperage rating of the transfer switch must be equal to, or
greater than, the highest amperage rating of the utility and genera-
tor breakers feeding the switch.
Figure 3.1 — Standby Isolation
3.3 TOTAL CIRCUIT ISOLATION
METHOD
When a generator capable of powering all electrical loads in the
circuit is to be installed, use the “Total Circuit Isolation Method.” It
is possible for the generator to be overloaded when this isolation
method is employed. The following apply to the transfer switch in
this type of system.
• Ampere rating of the transfer switch must equal the ampere
rating of the normal incoming utility service.
• The transfer switch is installed between the utility service
entrance and the building distribution panel.
The generator will be backing up all electrical loads within the
circuit, so the amperage rating of the transfer switch must be
equal to, or greater than, the amperage rating of the normal utility
service.
Unless a service entrance rated transfer switch is used, a main
service disconnect (D) must be located before the transfer switch.
The transfer switch is installed between the utility service entrance
and the building distribution panel (A) (Figure 3.2).
Figure 3.2 — Total Circuit Isolation
3.4 ALL TRANSFER SWITCH
INSTALLATIONS
Power wiring, control wiring and wiring for the 15 or 20 Amp cir-
cuit required for the 2-Amp smart charger should be in separate
conduit.
In all installations, a ground wire will run through the power conduit
from the generator connection panel to the transfer switch (Figure
3.3).
Figure 3.3 — Ground Wire
In any three-phase application, the phase rotation of the generator
power lines must match the phase rotation of the utility power lines
at the transfer switch (Figure 3.4).
A
E
ATS
D
A
ATS
Operation