Ppc3 And Ppc5 Tank Sizing; Reactors And Filters - Pentair Pentek Series Electronic Manual

SECTION 9: PPC Series 50/60 Hz Variable Frequency Drives
9.9

PPC3 and PPC5 Tank Sizing

These instructions are only for systems that require
tanks. Pressure tanks are generally required to maintain
system pressure during periods of low or no demand.
Tank pre-charge must be less than the pressure set point
– wake up deviation.
Total Tank Size x (Precharge+14.7)
Drawdown =
(Setpoint+14.7 – Wake Up Deviation)

9.10 Reactors And Filters

Variable frequency drives produce voltage spikes that are
a function of voltage rise-time and length of motor cable.
In extreme cases peak voltage may exceed three times
the nominal operating voltage.
Reactors
A reactor is a resistance and inductance device that
reduces voltage spikes. It does this by both increasing the
voltage rise-time and improving the impedance match of
the cable and motor.
Filters
A filter combines a reactor with a capacitor network. The
capacitors absorb a portion of the voltage spikes. This
further reduces the peak voltage seen at the motor.
When to Use a Reactor or Filter
The chart below is a general guideline when choosing
between using a filter or reactor.
up to 50'
Motor Type 230 V
NEMA Above-Ground
Std. Efficiency
NEMA Above-Ground -
Premium Efficiency
Submersible
R = Reactor F = Filter
The following list indicates a greater need for filters
and reactors:
• Long motor leads are used
• Standard efficiency or submersible motors are used.
• The cost of replacing the motor is prohibitive.
• Using a submersible motor with a voltage rating
greater than 230V.
• The quality and/or age of the motor is unknown.
• Condition of wiring and/or power quality is unknown.
Lead Length
50' to 150' 150' to 1000'
460V 230V 460V 230V 460V
R
- R
F F
-
R R F
Tank can be sized using Boyle's law (V1 x P1 = V2 x P2).
Units are in gallons and PSI.
Typically tanks are sized for approximately 20% of pump
capacity. For example, a 150 gpm pump typically requires
30 gallon total tank size.
Total Tank Size x (Precharge+14.7)
__
(Setpoint+14.7)
Reactors
Open Design NEMA 1
230 or 460 V 230 or 460 V
Model Model
KDRA1P KDRA1PC1
DDRA2P KDRA2PC1
KDRA3P KDRA3PC1
KDRA4P KDRA4PC1
KDRB1P KDRB1PC1
KDRD1P KDRD1PC2
KDRD2P KDRD2PC2
KDRD3P KDRD3PC2
KDRD4P KDRD4PC2
KDRC1P KDRC1PC2
KDRF1P KDRF1PC3
KDRF2P KDRF2PC3
KDRF3P KDRF3PC4
KDRH1P KDRH1PC4
KDRI1P KDRI1PC4
KDRI2P KDRI2PC4
KDRG1P KDRG1PC4
Filters
NEMA 1, 230, 460 or 575 V
Model
KLC4BE
KLC6BE
KLC8BE
KLC12BE
KLC16BE
KLC25BE
KLC35BE
KLC45BE
KLC55BE
KLC80BE
KLC110BE
KLC130BE
KLC160BE
KLC200BE
KLC250BE
NEMA 1
Rated 575 V Rated
Amps Model Amps
3.4 KDRA31PC1 2.7
4.8 KDRA35PC1 3.9
7.6 KDRA33PC1 6.1
11 KDRA34PC1 9
14 KDRA36PC1 11
21 KDRD31PC2 17
27 KDRD32PC2 22
34 KDRD35PC2 27
40 KDRD33PC2 32
52 KDRD34PC2 41
65 KDRC31PC2 52
77 KDRF31PC3 62
96 KDRF32PC3 77
124 KDRF33PC4 99
156 KDRH31PC4 125
180 KDRI31PC4 144
240 KDRI32PC4 192
KDRG31PC4 242
NEMA 1, CUL Listed
Model Rated Amps
KLCUL4BE 4
KLCUL6BE 6
KLCUL8BE 8
KLCUL12BE 12
KLCUL16BE 16
KLCUL25BE 25
KLCUL35BE 35
KLCUL45BE 45
KLCUL55BE 55
KLCUL80BE 80
KLCUL110BE 110
KLCUL130BE 130
KLCUL160BE 160
KLCUL200BE 200
KLCUL250BE 250
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