Generator Air Temperature Indicating and Alarm System (CKT 1ED)

demand digital display. In the event the temperature

The power for the console alarm circuits is taken from

the console.

exceeds a predetermined value, an alarm indicator is

energized.

AUXILIARY MACHINERY CIRCULATING

The high-temperature switches in the cooling air

WATER TEMPERATURE INDICATING

exhaust, which operates when temperature reaches a

AND ALARM SYSTEM (CKT 2EW)

predetermined limit, actuates visual and audible alarm

indicators on the type IC/SM alarm panel associated

Circuit 2EW provides a means for indicating high

with the generator.

temperatures in the ship's service diesel generators

engine circulating water. This system is classified as

Circuitry of the alarm switchboards and associ-

semivital readiness class 1.

ated connections may be verified using the procedures

previously described. Checkout procedures for the

Sensors of the resistance-temperature-detector

console circuits can be found in the Electric Plant

(RDT) type are installed in the circulating water line

Control Console Technical Manual.

of each diesel generator. High-temperature switches,

fitted with supervisory resistors across the contacts,

Power for each alarm switchboard circuit is taken

are also provided in the circulating water line.

from the associated alarm switchboard. Power for the

console circuits is taken from the console.

Each RTD in the circulating water line provides a

signal to an RTD conditioner in the electric plant

GENERATOR BEARING AND STATOR

o p e r a t i n g console. Temperature is displayed

TEMPERATURE INDICATING AND

continuously on a temperature meter and as a demand

ALARM SYSTEM (CKT EF)

digital display. If circulating water temperature rises

to a predetermined limit, an alarm signal is generated

Circuit EF provides a means for indicating high

that energizes visual and audible alarm indicators at

temperature in bearings and stators of ship's service

the type IC/SM alarm panel associated with the

diesel generators. This circuit is classified as semivital

generator.

readiness class 1.

Checkout procedures for this circuit can be found

in the Electric Plant Control Console Technical

A sensor of the RDT type is installed so that it is

Manual. Switchboards and associated connections can

in contact with the bearing or the stator, A high-

be checked out as described previously.

temperature switch is also installed so that it is in

contact with the bearing.

Power supply for the circulating water indicating

and alarm circuits associated with the electric plant

The RTD at a bearing sends a signal to an RTD

control console is taken from the console. Power for

conditioner in the electric plant control console.

the alarm circuits associated with the alarm

Temperature is displayed on a demand digital readout.

switchboards is taken from the switchboard.

In the event the temperature exceeds a predetermined

value, visual and audible alarms are energized.

GENERATOR AIR TEMPERATURE

An increase in the temperature at the bearing to a

INDICATING AND ALARM SYSTEM

predetermined temperature causes the temperature

(CKT 1ED)

switch to operate, actuating a visual and audible

indication at the type IC/SM alarm panel associated

Circuit 1ED provides a means of indicating high

with the generator. Operation of the circuits of this

temperature of the cooling air exhaust of the ship's

switchboard has been previously described.

service diesel generators. This circuit is classified as

semivital readiness class 1.

The RTDs at the generator stators provide signals

to an RTD conditioner in the electric plant control

A sensor of the RTD type is installed in the cooling

console. Temperature for each phase is continuously

air exhaust of each diesel generator. In addition, a

available through a selector switch for display on a

high-temperature switch is installed adjacent to the

temperature meter.

sensor.

Checkout procedures for the bearing and stator

The RTD in the cooling air exhaust provides a

circuits can be found in the Electric Plant Control

signal to an RTD conditioner in the electric plant

Console Technical Manual. Alarm switchboard

control console. Temperature data is available at the

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