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28.5 VDC Ground Power Unit
Models:
11A6647-1000/1010
11B6647-1000/1010
11C6647-1000/1010
11D6647-1000/1010
11A6647C1000/1010
11B6647C1000/1010
11C6647C1000/1010
11D6647C1000/1010
11A6655-1000/1020
11B6655-1000/1020
11C6655-1000/1020
11A6655C1000/1020
11B6655C1000/1020
11C6655C1000/1020
11D6655C1000/1020
11A6665-1000/1010
11B6665-1000/1010
11C6665-1000/1010
11A6666-1000
11B6666-1000
11C6666-1000
12/2006 - Rev. 04
- 12 -
3.0 SYSTEM DESCRIPTION (CONTINUED)
3.9
OVERVIEW OF 28V DC GPU COMPONENTS
The modules and components of the individual sizes of the 28V DC GPU are shown in the outline
drawings in this section. The sizes and arrangement of the modules and components shown vary slightly
according to the power rating and version of the 28V DC GPU sets.
Abbreviation
Description of Component
A 006 ............................ Rectifier
A 010 ............................ Firing board
A 011 ............................ EMI-Filter input
A 012 ............................ EMI filter output
A 100 ............................ System controller board
A 101 ............................ 28V Relays (option; split F-contact only)
A 110 ............................ Measurement board input
A 211 ............................ Power Supply
A 230 ............................ Customer connection board (option)
A 240 ............................ Control Panel
C 060 – 064 .................. Filtering capacitors
E 002 ............................ Heater (option)
K 001 ............................ Input contactor (option)
L 062 ............................. EMI Choke
M 001 ............................ Cooling Fan
R 001 ............................ Load resistor
Q 001 ............................ Input circuit breaker
Q 100 ............................ Protective circuit-breaker control voltage
S 001 ............................ Front door closed microswitch
S 002 ............................ Rear door closed microswitch
S 003 ............................ Current limit selector switch
T 001 ............................. Current transformer input circuit
T 002 ............................. Current transformer input circuit
T 006 ............................. Isolated 3 phase output transformer
T 211 ............................. Transformer control voltage
T 212 ............................. Transformer auxiliary voltage (option)
V 001 ............................ Thyristor Phase L1
V 002 ............................ Thyristor Phase L2
V 003 ............................ Thyristor Phase L3
X 1 ................................ Terminals mains input
X 2 ................................ Connection point DC output
X 100 ............................ Internal terminals
X 10 .............................. Terminal for remote voltage sensing (option)