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SUBJECT
CHAPTER/SECTION
PAGE
(e) Tray
1-1
12
(f) Manual voltage control
1-1
12
(g) Excitation-deenergization relay
1-1
12
(2) Protective relay tray (Figure 9)
1-1
12
(a) Sensing modules
1-1
12
(b) Memory and time delay module
1-1
14
(c) Indicating lights
1-1
14
(d) Plug interlock relay
1-1
14
(e) Test bank switch
1-1
14
(f) Resistor
1-1
14
(g) Fuse-interlock relay
1-1
14
(h) Connector
1-1
14
(j) Auxiliary underfrequency relay
1-1
14
F. Engine Control Panel (Fig. 10)
1-1 . . . . . . . . . . . . . . . . . . . . . . . 16
(1) Engine Instruments
1-1
16
(a) Ammeter
1-1
16
(b) Oil Temperature Gage
1-1
16
(c) Oil Pressure gage and oil
pressure switch
1-1
16
(d) Hourmeter
1-1
16
(2) Engine and generator controls
1-1
16
(a) Fuse
1-1
16
(b) Engine-generator control switch
1-1
16
(c) Contactor control switch
1-1
16
(d) Indicating lights
1-1
17
(e) Fuel gage and blocking diodes
1-1
17
(f) Cold weather starting aid
control (Optional)
1-1
17
(g) Engine stop control
1-1
17
(h) Air cleaner indicator
1-1
17
(j) Test receptacle connector
1-1
17
G. Voltage Regulator
1-1 . . . . . . . . . . . . . . . . . . . . . . . 19
(1) Controls
1-1
20
(2) Protection
1-1
20
(3) Components (See Fig. 12)
1-1
20
H. Power Module Panel Assembly . . . . . . . 1-1. . . . . . . . . . . . . . . . . . . . . . . . 20
(1) Load contactor
1-1
20
(2) Current transformers
1-1
20
(a) Ammeter current transformers
1-1
20
(b) Line-drop current transformers
1-1
20
(c) Overload current transformers
1-1
21
(3) Overload module
1-1
21
(4) Rectifier
1-1
23
6. Test Box
1-1
23
A. Description (See Fig. 14) . . . . . . . . . . . . 1-1. . . . . . . . . . . . . . . . . . . . . . . . 23
B. Theory of Operation . . . . . . . . . . . . . . . . 1-1. . . . . . . . . . . . . . . . . . . . . . . . 23
7. Dual Output Machine
1-1
24
OM-2040 / Operation and Maintenance Manual
90D20 / Generator Sets
Table of Contents
February 28/94 Revised
Page 2
Содержание 6921 Series
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