Auxiliary Supply Pcb Cs0070; Battery Threshold Settings - Powertronix Quasar Service Manual

Chapter 5 - Functional description

Auxiliary Supply PCB CS0070

5.2 - Auxiliary Supply PCB CS0070
The auxiliary power supply is based on a fly back converter circuit, the source supply being the 750 volt
DC Bus. Secondary windings of the power supply transformer provide the control logic and the power
component gate drive circuits.
The auxiliary power supply generates a regulated 7. 5Vdc and l5Vdc voltage.
Adjustments to the battery threshold voltage are made from the auxiliary power supply by setting the
potientiometers P1, P2 and P3.

5.2.1 - Battery Threshold settings

5 - 2
c) J6 J7 J8 define the overload level related to the UPS ratings
Link
J6
J7
J8
d) J9 J10 J12 defines the inverter peak current limit for the appropriate UPS output rating.
Link
J9
J10
J12
e) J11 define the converter peak current limit. (normally closed for all UPS output ratings).
a) Maximum voltage (500 Vdc) adjusted with P1.
b) Minimum voltage (320 Vdc) adjusted with P2.
c) Pre alarm voltage (350 Vdc) adjusted with P3.
Service Manual
10K 20K
open close
close open
close close
10K 20K
open close
open open
open open
3x3 UPS Functional description
Issue 2 - November 2001
30K
open
close
open
30K
open
close
open