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Chapter 2 Functional Description GEH-6632 EX2100 User’s Guide
Simplex Control System
The interconnections between the simplex control and the terminal boards,
generator protection modules, and power supply are shown in Figure 2-5. Only one
EPSM power supply is used but this can have both ac and dc supplies for increased
reliability.
PT
CT
TRIP
TRIPTRIP
TRIP
86
8686
86
PT
PT
PT
CT
EPCT
2nd
2nd2nd
2nd
TRIP
TRIPTRIP
TRIP
ECTB
EPDM
125 V dc
Battery
Ethernet Data Highway to
Mark VI, LCI, and HMI
PPT and air
core CT
ac feedbacks
EPSM
Power
Supply
Option:
DACA
Rectified ac
Coil Power
GPA power
125 Vdc
3-phase
Voltage
Sensing
3-phase
Current
Sensing
Contact
Inputs
Contact
Outputs
Gate Pulse Amplifier
Fiber-optic Feedback
EDCF
Keypad
Computer (Tool)
Field Current
& Voltage
EGPA
To SCRs
125Vdc
5 Vdc
15 Vdc
24 Vdc
70 Vdc
To Flashing
panel
41 Device
De-
excitation
125 Vdc
Crowbar
EXTB
53A
pilot
41
trip
53B
pilot
41
close
70 V dc
ACLA
EMIO Master I/0
ESEL
DSPXEISB
De-
excitation
70 Vdc
Control Module M1
EGDM
Field
Ground
Detector
EACF
De-ex
pilot
EDEX
Optional:
Crowbar
EXAM
Figure 2-5. Simplex Control and Cabling to Terminal Boards