Smart Power Systems HR-30 (3-Phase) - Manual (Page 24)

Smart Power
®
Systems
A. C. MODULAR GENERATOR SYSTEM
Page 23 of 52
138V circuits, 3 240V 2 phase circuits (phase A-B, B-C, C-A), and one 3 phase
circuit, all active concurrently.
To completely utilize the generator’s output capabilities, the loads must be
equally divided between the generator’s three main windings and neutral.
Before wiring the vehicle, calculate the total wattage of the load that will be
connected to the generator. Next, create three groups of loads based on total
wattage. Three phase loads must be included in all three groups. 240V 2
phase loads have some flexibility and can be assigned to pairs of groups (A-B,
A-C, B-C). 138V single phase loads go into the individual groups and can be
assigned individually to finish balancing out the loads. It may be necessary to
exchange loads between the three groups until the total wattage of the groups is
as close as possible to being equal and none of the groups exceed 80A. Wire
the system with one group connected to Phase A, another group connected to
Phase B, and the third group connected to Phase C. 138V circuits are wired
between the appropriate phase and neutral.
WARNING:
The generator provides 138V, not 120V for single phase circuits. 120 V rated
equipment may be damaged by operation at 138V. Smart Power
®
Systems assumes
no liability for damage to equipment not rated to operate at 138V which is connected
to the HR-30 3 Phase Generator System in the single phase 138V configuration. For
120V loads that are not rated to work at the 138V a step down transformer is
required, either from 138V to 120V or from 240V to 120V.
To ensure proper voltage regulation, during the operation of generator system, the
load difference between the three Phases A, Phase B, and Phase C must never
exceed 20%. Damage to generator system caused by operating it with an unbalance
load will void the system’s warranty.
Wiring of the A.C. modular generator system and electrical distribution throughout
the vehicle must be done in accordance with applicable sections in the National Fire
Protection Association’s document NFPA 1901, the National Electrical Code
®
and/or
other applicable, recognized electrical codes and by a certified electrician.
Smart Power
®
Systems’ A.C. modular generators are supplied with the neutral
bonded to ground. Refer to National Fire Protection Association’s document NFPA
1901, National Electrical Code
®
, and/or other applicable recognized electrical codes
before wiring an SPS A.C. modular generator system.
Never wire any loads to the generator’s output without a circuit breaker in series
with the load. Damage to the generator, to the components within that circuit,
electrical shock, or fire may result if a short occurs in an unprotected circuit. Run
all 138 VAC and 240 VAC electrical connections between the generator and the
distribution panel in conduit. Not installing and using the 80A 3 Phase main circuit