9- 50 Service Guide LWE180, LWE200, LPE200, LPE240 © BT Europe AB
Electrical System – 5000 LWE 180/200 LPE 200
Part number
T-code Valid from serial number Date Order number
660, 661, 662, 497 723984- 2005-05-11 225553-040
9.7 Part number
• Press and hold S18 while turning S17 to “ON” position.
• Press S18 until Pn = part number is displayed.
• You have now selected Pn = part number and the symbol ”D” is lit as
an indication of what is now shown in the display. Initially, Pn =
number is displayed for the component’s entire unit.
• By scrolling with L1, you can get the following information:
• SPn = Part number for software.
• HPn = Part number for hardware.
• HSn = Serial number for hardware.
9.8 Transistor panel
9.8.1 General
Curtis 1243 is a regulator that controls shunt motors. What primarily
controls the speed is the variation in the voltage in the rotor. The volt
-
age is varied by means of pulse width modulation (PWM). This also
includes variation in "on" time for the MOS transistors that regulate the
rotor current.
The rotation direction is changed by changing the polarity in the field
winding (S1-S2). The regulator is equipped with a transistor-fitted four-
quadrant bridge for the field winding and a single-quadrant bridge for
the rotor winding.
A
B
C
DE
MODEL
STATUS
SERIAL
VOLTAGE
CURRENT
M
A1 A
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