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RF-MCGARDPRO
Hubbell Power Systems, Inc.
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RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
5-57
Table 5-23 Power Amp, Power Supplies
Assembly Number
Input Voltage Range
107250-4
38Vdc to 150Vdc
107250-5
200Vdc to 300Vdc
The 9508 Power Amplifier, Power Supply is a dual output, dc to dc converter. It is a switching
power supply using pulse width modulation. The 107254-4 operates from 38 Vdc to 150 Vdc,
and the 107254-5 operates from 200 Vdc to 300 Vdc. Each supply has two outputs, +30 Vdc @
0.25 Amps and +92 Vdc @ 2.4 Amps. Both outputs are connected to a common ground. A block
diagram of the Power Supply is shown in below
INPUT
TRANSIENT
PROTECTION
INRUSH
CURRENT
LIMITING
DRIVE
CIRCUITRY
SWITCHING
TRANS-
FORMER
OUTPUT
FILTERING
+92 Vdc
+30 Vdc
STATION
BATTERY
INPUT
OPTICAL
ISOLATOR
PULSE
WIDTH
MODULATOR
Figure 5-35. Power Amplifier, Power Supply, Block Diagram