BEHLMAN BL3300 Series, User'S Manual And Technical Reference Manual

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BL3300 SERIES MANUAL 01/28/2013
SECTION 4
MAINTENANCE AND ADJUSTMENTS
4.2.10 LINE DROP COMPENSATION TRIM ( continued)
4) Set OUTPUT switch to OFF.
5) Adjust VOLTS control to desired setting on DVM. Note voltage setting. (Should be the same as the
panel meter indication.)
6) Set OUTPUT switch to ON.
7) Adjust front panel N A I.R. COMP potentiometer to pre-load voltage setting noted in step 5.
8) Repeat 4.2.10 for N B and N C.
4.2.11 PHASE ADJUSTMENT
4.3.1 To adjust the phase shift between two phases, proceed as follows:
1) Connect DVM between N A and N B on output terminal strip.
2) Turn on circuit breaker and output switch and adjust output to 100 VRMS.
3) To produce a phase shift between phase A and phase B, adjust phase difference between N A - N B
until DVM indicates the Vrms value required to produce the desired phase angle. Use the table below
as a guide. It shows five predetermined values. For in-between phase angles, use the formulas
shown.
DVM Phase V = [(1-cos N ) 20,000]
½
(Vrms) Angle(°) N = cos
-1
[1-V
2
/20,000]
81.3 48 where V = Vrms setting on DVM
100.0 60 and N = phase angle desired
141.4 90
173.2 120
190.2 144
4) Connect DVM across N B and N C and repeat 4.3.1.