
100.210-IOM (FEB 2015)
Page 51
VYPER
™
VARIABLE SPEED DRIVE
OPERATION
Step 3:
(See.Table.17.or.18).Use.high.Motor.Amps.Calcu-
lations.Table.A.or.B.based.on.the.following:
• If value of Line 3 is less than the value of Line 6, use
Table A (Table 17) for amp calculations.
• If value of Line 3 is greater than value of Line 6, use
Table B (Table 18) for amp calculations.
TABlE 17 – HIgH moTor AmP SETPoInT CAlCUlATIonS
(TABlE A)
Table A - High Motor Amp Setpoint Calculations
Parameter
Equation
Value
Load.Inhibit
=Applied.Motor.FLA.x.1.1
Force.Unload
=Applied.Motor.FLA.x.1.12
Warning
=Applied.Motor.FLA.x.1.13
Shutdown
=Applied.Motor.FLA.x.1.15
TABlE 18 – HIgH moTor AmP SETPoInT CAlCUlATIonS
(TABlE B)
Table B - High Motor Amp Setpoint Calculations
Parameter
Equation
Value
Load.Inhibit
=.Vyper.Amp.Limit.x.0.97
Force.Unload
=.Vyper.Amp.Limit
Warning
=.Vyper.Amp.Limit.x.1.01
Shutdown
=.Vyper.Amp.Limit.x.1.03
Step 4:
(See.Figure.52)..Program.the.calculated.values.for.
high.Motor.Amps..Set.the.delay.for.Warning.and.Shutdown.
setpoints.for.five.(5).seconds..Refer.to.the.examples..pro-
vided.as.necessary.
Use.the.cursor.arrow.and.[
Tab
].keys.to.navigate.between.
setpoints..Use.the.keypad.to.program.the.setpoints.as.calcu-
lated..Press.the.[
Enter
].key.to.accept.the.value.for.each.field.
Figure 53 - High motor Amps
High Motor Amp Limit Examples
Example 1
(See.Figures.56.and.57).What.are.the.high.Motor.
Amp.setpoints.if.a.700.hP.Vyper
™
.is.to.drive.a.motor.with.1.15.
SF.and.a.679.Amp.FLA?.Using.these.values,.determine.whether.
Table.A.or.Table.B.should.be.used.to.calculate.the.setpoints.
Line
Parameter
Value
1
Applied.Motor.FLA
679.A
2
Applied.Service.Factor
1.15
3
Multiply.(Line.1.x.Line.2)
780.A.
4
hP.rating.of.Vyper.Drive
700.hP
5
Vyper.Amp.Limit.
If.Line.4.is.700/572.hP,.value.is.880.A.
If.Line.4.is.912/752.hP,.value.is.1180.A
880.A
6
Multiply.Line.5.x.1.05
924.A
Figure 54 - Ex.1 motor Amps Safety Calculation Table
The.value.of.Line.3.is.780.Amps;.this.is.less.than.Line.6.Value.
of.924.Amps..Therefore,.use.Table.A.(Table.17).for.high.Motor.
Amp.setpoint.calculation..Refer.to.Figure.53.for.the.locations.
to.enter.calculated.values.
Table A - High Motor Amp Setpoint Calculations
Parameter
Equation
Value
Load.Inhibit
=Applied.Motor.FLA.x.1.1
858.A
Force.Unload
=Applied.Motor.FLA.x.1.12
873.A
Warning
=Applied.Motor.FLA.x.1.13
881.A
Shutdown
=Applied.Motor.FLA.x.1.15.
897.A
Figure 55 - Ex. 1 motor Amp Setpoint Calculations (Table A)
Example 2
(See.Figures.56.and.57).What.are.the.high.Motor.
Amp.setpoints.if.a.912.hP.Vyper™.will.drive.a.motor.with.
1.15.SF.and.a.1082.Amp.FLA?.Using.these.values,.determine.
whether.Table.A.or.Table.B.should.be.used.to.calculate.the.
setpoints.
Line
Parameter
Value
1
Applied.Motor.FLA
1082.A
2
Applied.Service.Factor
1.15
3
Multiply.(Line.1.x.Line.2)
1245.A
4
hP.rating.of.Vyper.Drive
912.hP
5
.
Vyper.Amp.Limit.
If.Line.4.is.700/572.hP,.value.is.880.A.
If.Line.4.is.912/752.hP,.value.is.1180.A
1180.A
6
Multiply.Line.5.x.1.05
1239.A
Figure 56 - Ex. 2 motor Amps Safety Calculation Table
The.value.of.Line.3.is.1245.Amps;.this.is.greater.than.Line.
6.value.of.1239.Amps..Therefore,.use.Table.B.(Table.18).for.
high.Motor.Amp.setpoint.calculation..Refer.to.Figure.53.for.
the.locations.to.enter.calculated.values.
Table B - High Motor Amp Setpoint Calculations
Parameter
Equation
Value
Load.Inhibit
=.Vyper.Amp.Limit.x.0.97
1144.A
Force.Unload
=.Vyper.Amp.Limit
1180.A
Warning
=.Vyper.Amp.Limit.x.1.01
1191.A
Shutdown
=.Vyper.Amp.Limit.x.1.03
1215.A
Figure 57 - Ex.2 motor Amp Setpoint Calculations (Table B)