centrifuge gea june 09-sd training
TRANSCRIPT
8/22/2019 Centrifuge GEA June 09-SD Training
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Retrofit of a Drive on a separator at Southcorp winery /Australia
Principle
Benefits
Features
Savings
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Separators
– using vertical centrifugal force to separate solids from liquids
Food & Beverage
Waste Water
Industry
Marine
Oil & Gas
belt- or geardriven
AC-motor
direct driven
AC-motor
direct driven
AC-motor/PM-motor
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Benefits when using a VLT Automation Drive FC302 on a separator
no „high temp motor“
no feeder tank
no contactor on the input
less downtime
smooth process control
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No high temp motor
• fast acc. time – ramp-up on current-limit
to limit starting current
to ensure fast processes
to ensure short off-times
reduced motor cost
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No feeder tank
• load sharing separator and feeder pump
safe process even at power loss
less water consumption
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No contactor on the input
• safe motor off
Safe torque off „STO “ with terminal 37
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Less downtime
• fast dec. time – ramp-down on OVC and AC-brake
to ensure fast processes
to ensure short off-times
High inertia of separator bowl
Takes appr. 2,5 hours to standstill when coast*
- 50 minutes with OVC
-25 minutes with OVC and AC-brake
*55kW motor
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Less downtime
• catch a turning motor – flystart
to ensure fast processes
to ensure short off-times
High inertia !
- 2,5 hours to standstill when coasting
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Smooth process control
• disludging – fast current controller
shockload at disludging of the separator
sizing 110% overload
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Purchase vs. installed cost
250 €
800 €
600 €
40 € 200 €
1.110 €
3.000 €
0 €
1.000 €
2.000 €
3.000 €
4.000 €
4 5 k W
s t a n
d a r d d r i
v e
I n p u
t c o n
t a c t o r
F e e d
e r t a n
k
W a t e r
/ y e a
r
R e d u
c e d d o
w n t i m
e p e
r s t o
p
B r a k
e c h o
p p e r / r e
s i s t o r
A c t u a l
d r i v e c o
s t
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Separators
– specialities
• direct driven – high output frequency/PM motorcontroller
2/4 pole motors 60-70Hz
AC- and PM-motors
• independent on motor supplier
Danfoss philosophy
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Separators
– specialities
• safe speed monitoring – SLS
Safe Limited Speed new B-option*
to avoid the risk of mechanical destruction
*available 2010
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Separators
– usefull features
• Full protection on Exde-motors
MCB 112
saves the contactor on the input
saves panel space
saves installation cost
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Separators
– usefull features
• Know How protection
Extended PW-protection
protects the business – also service