Power-Sure™ 700 — Three Phase Power Conditioners

CAUTION:

THE CONTROL BOARD (#49120/407415) IS ELECTRICALLY REFERENCED TO

 

HIGH VOLTAGE, NOT EARTH OR CHASSIS GROUND. EXTREME CARE MUST BE

 

USED WHEN TAKING MEASUREMENTS ON THE CONTROL BOARD. ANY AC

 

POWERED INSTRUMENTS MUST BE GROUND ISOLATED PRIOR TO TAKING

 

MEASUREMENTS. A GROUND ISOLATED INSTRUMENT CASE WILL BE AT THE

 

HIGH VOLTAGE LINE POTENTIAL.

 

 

3.9.2 Control Card Adjustment Procedure

1.Prior to attempting any adjustment, measure the incoming voltage to the unit. Assure the voltage level is within the specified input range of the unit.

2.Turn off power to unit.

3.Remove all loads from the output of unit under adjustment.

4.Remove both TB2 connectors on all control boards #49120/407415. Turn power on.

5.With DC voltmeter on the millivolt scale check between TP1 and TP GND and adjust P2 so meter reads “0” millivolts or as close as possible.

Figure 3-11: Power-Sure™ 700 Controller Card (Top View).

1

TB3

TP2

P2 P1

TP1

GRND

TB2 17 TB2 1

TB2

TP

GND

115V 208V 240V

49120 /

407415

6.Use Formula X below to calculate the next adjustments. You must calculate each input phase for each control card or a total of 3 calculations:

◗For phase 1 control card, measure AC input at Line 1 to Line 2.

◗For phase 2 control card, measure AC input at Line 2 to Line 3.

◗For phase 3 control card, measure AC input at Line 1 to Line 3.

3 —16

Maintenance

86-108814-00 B01