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Three-phase Delta Stator Connection
This type of stator has six coils and 12 leads (Figure 1.5). Units
may be assigned any of the following voltage codes:
• "J" units are rated 120/240 VAC, three-phase, 60 Hertz.
• "P" units are rated 100/200 VAC, three-phase, 50 Hertz.
Figure 1.5 – Three-phase Delta Stator Connection
Single-/Three-phase Delta Stator Connection
This type of stator has six coils and 12 leads (Figure 1.6). Two
coils/windings are wound with additional copper to allow for
operation at full rated kW, single-phase. Units may be assigned any
of the following voltage codes:
• "D" units are rated 120/240 VAC, three-phase, 60 Hertz.
Single-phase loads should be connected to E1, E3 and Neutral.
Cannot be reconfigured to 277/480 VAC.
Figure 1.6 – Single-/Three-phase
Delta Stator Connection
NOTE:
SIX-LEAD, 600 VAC, THREE-PHASE STATOR
This type of stator has three coils and six leads (Figure 1.7). Units
may be assigned any of the following voltage codes:
• "L" units are rated 346/600 VAC, three-phase, 60 Hertz.
• "S" units are rated 277/480 VAC, three-phase, 50 Hertz.
Figure 1.7 – Six-lead Stator Connection
GENERATOR AND LOAD
COMPATIBILITY
The generator must be fully compatible with the rated voltage,
phase and frequency of the connected electrical loads. The gen-
erator, connected electrical devices, or both, can be damaged if
voltage, phase and frequency are not compatible.
This manual assumes that the standby generator has been
properly selected, installed and interconnected by a competent,
qualified electrician or installation contractor. Once the installa-
tion is complete, do nothing that may result in noncompatibility
between the generator and connected electrical loads.
STARTING AIDS
The standby generator may be equipped with one or more start-
ing aids that serve to provide quicker, easier starts under varying
climactic conditions.
This generator may have been mounted with (a) an engine coolant
heater, (b) an engine oil heater, (c) a battery warmer or (d) a bat-
tery charger. These aids are powered by a normal (utility) power
source during nonoperating periods.
ENGINE COOLANT HEATERS
If the unit is equipped with an engine coolant (block) heater (Figure
1.8), it is powered by a circuit normally fed by the utility power
supply. This heats the engine coolant when the unit is not operat-
ing. This action keeps the engine warm even in cold weather,
helping to ensure quicker starts. Heated coolant in the engine rises
continuously drawing cold coolant into the heater, therefore mak-
ing certain of a constant flow of warm coolant through the engine.
General Information
NOTE:
7
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