PROJ00527

• Contract/PO #: FS0024X
• Contractor Name: Florida Water Conservancy District
• Contract Type: Loan
• Water District: 0
• County: La Plata
• Loan Projects - Doc Type: Feasibility Study

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The application of an induction generator permits the selec-
tion and use of a standard combination, full voltage, magnetic
motor starter. This type of controller already contains
many of the protective functions required by the utility as well
as the facility.

The modified, full voltage, non-reversing, magnetic motor

starter will be the stop-start power switching device using a size

5 magnetic contactor. This apparatus is in an enclosure tenta-

tively to be located near the turbine in the gate chamber (see

Figure 7.5). Short circuit protection for the induction generator

is provided by an included instantaneous trip-molded case circuit

breaker. This breaker will also provide sensitive ground fault

protection for the generator by virtue of a zero sequence sensor

and a shunt trip device. Replica-type thermal overload devices

are to open the contactor in the event of overload on the

generator.

The size 5 starter will also include control power trans-
formers and necessary current transformers (CTS). Watt and var
transducers will be included to transmit this data to the opera-
tor's panel with low burden on the CTS. A 250-Watt strip heater
is to be included in the enclosure and energized only when the
turbine/generator is not in operation. This is for the high
humidity condition. This arrangement also provides the ability to
switch power factor capacitors with the generator. The magnetic
contactor and auxilliary relay also provides inherent undervoltage
protection.

Suitable power factor correction capacitors will be switched
with the induction generator to maintain 95% or less at no load.
Sizing will be selected on the manufacturer's data for the
generator. Mounting will be near or on the starter.

7.0-17