Siemens ROBICON Perfect Harmony Reliable, precise, and durable in the most demanding applications.
Siemens ROBICON Perfect Harmony Medium-Voltage VFD Reliable, precise, and durable in the most demanding applications.
The Drive of Choice for High Performance
Reliable, precise, and durable in the most demanding applications.
Answers for industry.
ROBICON Perfect Harmony™
https://www.robiconperfectharmony.com/
Siemens drives, the best-selling mediumvoltage AC drives in the world, deliver an
impressive combination of benefits:
• Lower operating costs
• Precise process control
• Lower maintenance costs
• Increased production efficiency
• Exceptional reliability
• Intuitive HMI
The ROBICON Perfect Harmony’s™
outstanding record has made it the drive
of choice for demanding applications that
require the highest levels of reliability,
precision, and longevity. Employed in
applications ranging from power
generation to oil and gas, water, marine,
and paper production, the ROBICON
Perfect Harmony drive is a versatile
performer that can help you significantly
increase productivity, enhance energy
efficiency, and reduce operating costs.
Siemens can provide a custom-engineered
ROBICON Perfect Harmony drive to
maximize your process. We’re the only
company that offers drives from 225 to
120,000 kW. And with an installed base
exceeding more than 2.2 million kW
worldwide, the ROBICON Perfect
Harmony is a proven workhorse that
can perform brilliantly for you, too.
A Bright Future Built on a
Firm Foundation
Since its introduction in 1994, the
ROBICON Perfect Harmony drive has
revolutionized power conversion and
continues to set industry standards for
reliability and innovation. As power
switching device technology advances
and increases output voltage capability,
Siemens improves each generation of
the ROBICON Perfect Harmony in three
key areas: increased reliability and
availability, increased efficiency, and
a smaller drive footprint.
Advances to our product line are made
without “reinventing the wheel” like other
drive manufacturers. We have maintained
the ROBICON Perfect Harmony’s core
topology and continue to advance its
capability, ensuring life-cycle product
support. By keeping the same topology,
our customers see a reduction in
maintenance and spare parts as well
as an increase in quality and lower lifecycle costs. We improve our products
by actively soliciting the input of our
customers, and we look forward to
counting you among them.
The ROBICON Perfect Harmony of today
represents an evolution founded on
experience garnered from our huge
installed base coupled with Siemens’
unparalleled investments in R&D. As
one of the largest companies in the
world, Siemens provides confidence
and financial stability in addition to
exceptional technology. We offer you
expertise across the globe and
a world of innovation.
ROBICON Perfect Harmony™
The Perfect Harmony of Performance and Value
According to energy authorities, industrial motors consume over a billion
kilowatt hours of energy each year – fully 50 percent of the world’s energy
usage. System enhancements such as improved sizing and proper matching
to load, more efficient drive trains, and adjustable speed drives will help drive
energy usage down, according to experts. That means that the right drive
can help you drive cost out of your operation by providing more precise and
efficient control of motors, fans, pumps, and other devices.
If your process includes motors, fans, or pumps and you haven’t installed a
drive yet, you’re letting thousands of dollars of energy costs eat away at
your bottom line every month because of process inefficiencies.
2 3
Versatility
The proven technology of ROBICON
Perfect Harmony drives meets the needs
of customers in almost any industry that
employs motors, fans, or pumps. The
ROBICON Perfect Harmony drive can
accept many different input voltages and
can provide motor output voltages up to
13,800 volts, putting it in a class by itself.
And with a life expectancy of 25 years, the
ROBICON Perfect Harmony lets you set it
and forget it. The rewards pile up as the
years pass by.
When it comes to retrofits, the
ROBICON Perfect Harmony upholds its
reputation as the world’s most versatile
medium-voltage drive.
The ROBICON Perfect Harmony is
compatible with your existing motor
systems, regardless of age, brand, or
voltage/frequency – even synchronous
motors can be upgraded.
You can be sure that the
ROBICON Perfect Harmony is compatible
with your power system because it
meets the most stringent IEEE 519
1992 requirements for current harmonic
distortion. We meet those guidelines
without filter or harmonic mitigation
equipment – the ROBICON Perfect
Harmony design includes a transformer
that employs phase shifting technology
to eliminate harmonic distortion at the
source.
Efficiency
The integrated ROBICON Perfect Harmony
maximizes efficiency in a number of
critical areas. Because systems seldom
require 100 percent power, the variable
drive provides only the necessary power
to the motor. As demands increase or
decrease, the drive can respond with the
precise power level needed.
One of the most inefficient power events
occurs at motor start-up. Typically, a
motor “slams” on – going from off to
100 percent with the flick of a switch.
By contrast, the “soft start” features of
the ROBICON Perfect Harmony decrease
stresses that can limit the life of your
equipment – gradually increasing power
to smoothly initiate power output with
full rated torque available during
acceleration from zero speed, but
without any current inrush into the
motor. Additionally, overall design
integration helps provide quick and
reliable start-ups and allows the addition
of power conversion redundancy.
Pre-wiring reduces installation costs as
well. It all adds up to give you a smaller,
more efficient and reliable system.
Designed for Maximum Versatility,
Efficiency, and Reliability
System Performance
The ROBICON Perfect
Harmony exceeds
.95 power factor at
normal operating
speeds without external
power-factor correction
capacitors. It also
provides more than
98 percent power
converter efficiency
and 97 to 96.5 percent
total drive system
efficiency.
Isolation
Transformer
Power
Converter
ROBICON
Perfect
Harmony
Integrated
VFD
Motor
Filter
Power
Converter
Isolation
Transformer
Power Factor
Correction
Harmonic
Filtering
Conventional
Drives
4160 VAC ASYNCHRONMOTOR 6600-7200 VAC ASYNCHRONMOTOR
Different by Design
The patented, integrated design of
the ROBICON Perfect Harmony drive
ensures a level of reliability, efficiency,
and versatility that is unmatched in
the power controls industry. The
ROBICON Perfect Harmony is designed
to withstand failures that would overwhelm conventional drive systems.
A traditional drive features up to five
separate components, such as harmonic
filter, power factor correction, transformer,
power converter, and motor filter. The
ROBICON Perfect Harmony’s topology
isolation transformer and power converter
are the only major components required.
The integrated system allows for quick,
easy, and less expensive installations and
start-ups – shortening your outages and
process downtime to give you more project
flexibility.
In the ROBICON Perfect Harmony, a series
of low-voltage cells are linked together
to build the medium-voltage power
output of the drive system. This patented
configuration delivers for you when it
comes to ease of maintenance, power
quality, and reliability. It also provides
the basis for one of its most important
advantages – increased availability
through the advanced cell bypass option.
Power Cell 6600–7200 VOLT DRIVE TOPOLOGY 4160 VOLT DRIVE TOPOLOGY
% Efficiency
% Speed
20 40 60 80 100
% Load
20 91.2% 95.1% 95.7% 96.4% 97.1%
40 95.1% 96.2% 96.8% 97.4%
60 95.8% 96.3% 97.1%
80 96.1% 96.7%
100 96.5%
Efficiency and power factor values are based on centrifugal load characteristics for torque and speed –
Gen4 Air-Cooled unit with aluminum transformer.
4 5
Source Voltage
Source Current
18-Pulse, Multi-level PWM
Source Voltage
Source Current
Unfiltered, 12-Pulse Input Diode Rectifier
ROBICON Perfect Harmony Series Waveform
• less than 3% total voltage distortion
• less than 5% total current distortion
• Meets IEEE 519-1992 at the input to the isolation transformer
12-Pulse Harmonic Waveform
• 5.9% total voltage distortion
• 8.8% total current distortion
Total power factor includes distortion and displacement power
factor.
System efficiency includes isolation transformer, harmonic filter,
power factor correction, and drive.
The ROBICON Perfect Harmony drive
meets the most stringent harmonic
re quirements for voltage and current
distortion:
• Protects other on-line equipment from
harmonic disturbance (computers,
telephones, lighting ballast, and other
power converters)
• Avoids costly and inefficient harmonic
filters and associated resonance problems
Clean Power Input
Measured Power Factor - Pump Load Typical System Efficiency - Pump Load
Power Quality Output
Motor Current
Motor Voltage
Motor Current
Motor Voltage
• Integrated transformer
– Eliminates common mode motor
insulation stress
– Protects power converter
semiconductors against line transients
– Isolation transformer is integral
component of ROBICON Perfect
Harmony
– Motor no longer requires additional
insulation
• Drive is compatible with new and
existing 1.0 or higher service factors
of induction and synchronous motors
• Smooth operation: no significant
drive-induced torque pulsations, even at
low speeds, thus eliminating expensive
flexible couplings
• Cool under pressure: no additional
drive-induced motor heating
• Versatile and flexible installation –
No cable length restrictions; isolation
transformer is integrated into the drive
• Works with standard motor insulation
ROBICON Perfect Harmony
Output Waveforms at 100% Speed
ROBICON Perfect Harmony
Output Waveforms at 50% Speed
Multi-Level, Pulse-Width Modulated,
Output-Voltage Waveform
Harmonic Comparison
ROBICON Perfect Harmony Series vs. Typical 12-pulse PWM Inverter
(100KVA, 5.75% Impedance Source)
CSI PWM or LCI
Robicon Perfect Harmony
10 20 30 40 50 60 70 80 90 100
80
82
84
86
88
90
92
94
96
98
100
Percent Load
AFE CSI Converter
w/o Power Factor
Correction Capacitors
Robicon Perfect Harmony
10 20 30 40 50 60 70 80 90 100
50
55
60
65
70
75
80
85
90
95
100
Percent Speed
6 7 Efficiency (%) Power Factor (%)
ProTOPS™
Another feature that enhances the
ROBICON Perfect Harmony’s reliability is
its control strategy. Our Process Tolerant
Protection Strategy (ProToPS™) is a
groundbreaking process control system
available exclusively from Siemens.
Instead of tripping the drive and automatically shutting down the system due
to a malfunction, ProToPS gives you a
hierarchical system of warnings. This
control strategy allows time to evaluate
the situation and respond appropriately
to avoid a system shutdown. ProToPS
has proven invaluable for many of our
ROBICON Perfect Harmony customers,
including strategic power plants,
refineries, water and wastewater
facilities, and process plants. With
additional response time and early
warnings, your operators can diagnose
problems, correct them, and maintain
uninterrupted production.
Maximized Availability
Reliability
The reliability and availability of the
ROBICON Perfect Harmony drive is second
to none due to sophisticated component
selection and design. A combination of
industry-proven components, redundant
bypass control technology, and hierarchical
system of warnings brings you a drive of
uncompromising prowess.
Insulated Gate Bipolar Transistors
Traction-grade Insulated Gate Bipolar
Transistors (IGBTs) form the backbone
of the ROBICON Perfect Harmony drive.
A proven power device across the
industrial power control industry, IGBT
technology has been in existence for
more than a decade. The stability and
availability of IGBTs give you reliable,
long-term, life-cycle confidence. But
that’s just the start of our forwardthinking design.
Advanced Cell Bypass
The ROBICON Perfect Harmony is
engineered to withstand failures that
would overwhelm conventional drives
because we’ve added redundancy options
into the system. Our patented, cell-based
configuration maximizes uptime and
simplifies modifications. Through a
redundant bypass control that is
completely separated from each power
cell, the ROBICON Perfect Harmony
ensures automatic bypass of a failed
power cell in 450 milliseconds (less
than 1/2 of a second).
Equivalent Circuit of 4-Cell Generation3
ROBICON
Perfect Harmony Drive with all cells in service
• 4160 Volts Type. (Line-to-Line)
Equivalent Circuit of 4-Cell ROBICON Perfect
Harmony Drive with Cell A4 out of service
• Unbalance after loss of A4
(not acceptable)
Equivalent Circuit of 4-Cell ROBICON Perfect
Harmony Drive with Cell A4 out of service
• Neutral Point Shift: Balance Restored after loss
of A4 by adjusting angles. Maximum Voltage =
87.5% x 4440V = 3850V
Line Transients Ride-Through
Not only does the built-in input isolation transformer provide
the required protection for the drive semiconductors, it is also a
key component in the drive’s capability to maintain continuous
operation without tripping — even with an input voltage below
30% of its nominal value. Furthermore, even if the drive input
voltage falls below 65% of its nominal value, the drive will
remain fully active for as long as the motor is spinning so that
motoring can be resumed without delay as soon as the input
voltage is restored.
8 9
Factory System Test
You can be confident that the
ROBICON Perfect Harmony will get your
process up and running because we
have the ability to test every product as
a complete system at full load – prior to
delivery. At our factory, we test every
transformer and power converter together
to ensure performance meets precise
specifications. In addition, factory testing
allows accurate efficiency measurements.
We also verify sequence of operation
and protection to ensure that the
ROBICON Perfect Harmony system
matches your needs.
Easy Setup and Control
• Easy-to-use, high-function keypad
on the door
• Touch-screen interface on door also
available
• Auto-tune feature shortens start-up
and guarantees operational efficiency
• Drive tool runs on PCs that can interface
through the RS 485 or Ethernet ports
that are standard
• Other protocols supported:
Modbus Plus™
DeviceNet Profile 12™
ControlNet™
PROFIBUS DP™
Other connectivity as required
by the user
Options add versatility to your
ROBICON Perfect Harmony drive. It is
available with forced-air cooling (left)
or self-contained, closed-loop, water
cooling (far left). Redundant pumps
are standard on water-cooled units.
Redundant blowers are a standard
option for air-cooled units.
The multi-cell design allows quick rack in/
out of power cells, making maintenance
of the ROBICON Perfect Harmony simple.
A hydraulic “cell lifter cart” is an option
for larger cell designs.
Get up and Running Fast
Control Drive Tool
• Provides Windows-based graphical user interface
• Has full functionality
• Same menu structure as keypad interface
10 11
Protecting Your Investment
From your first meeting with Siemens, you’ll notice the difference. Our experts
have tailored thousands of systems, so we have the experience to help you select
the right drives for your process. From initial specification through production,
delivery, and installation, we are wholly committed to your satisfaction.
You have a lot at stake and, as the world’s
foremost automation company, so do we.
That’s why Siemens’ service and support
network is never more than a phone call
away. Representatives are ready 24 hours
a day, seven days a week, to assist you
with immediate technical support geared
to handle every phase of installation,
start-up, maintenance, and troubleshooting.
Our services include:
• Around-the-clock field service 24/7/365
• Preventive maintenance
• Training
• After-market spare parts
• Product refurbishment
• Upgrades
• Repairs and exchanges
• Specialty services (harmonic analysis
studies, power quality studies, electrical
system application, remote diagnostics,
and more)
Our Commitment
Siemens is proud of our reputation
for long-term service of our products,
including the ROBICON Perfect Harmony.
We are committed to providing complete
life-cycle support. We never relinquish
the responsibility for servicing our
products to your full satisfaction,
regardless of the age of the product.
To extend the life span and increase the
functionality of the drive, the Siemens
refurbishment program gives you the
opportunity to upgrade ROBICON Perfect
Harmony drives with new technology
as it becomes available.
Local Convenience
Because we have long provided on-site
service for all of our customers, we
have the extensive reach of a dedicated,
global service force. Each of our service
representatives is fully trained.
12 13
General
Power semiconductors IGBTs; diodes
Line-side converter 18- to 36-pulse diode rectifier
(standard)
Motor-side converter Multi-level converter (PWM) with
IGBT power modules
Drive control Sensorless and closed-loop control,
fully digital with signal processor
Drive quadrants Driving: 2 directions of rotation
(2 quadrants)
Potential separation:
Power section Fiber-optic cable
Permissible humidity
rating
Relative air humidity < 95%
noncondensing
Efficiency
(standard version)
Higher than 96% at the rated
operating point including
transformer
Regulations compliances IEEE, ANSI, NEMA, UL, CSA, CE
Paint finish ANSI 61 Gray
Degree of protection Acc. to DIN VDE 0470, IEC 60529,
EN 60529
– Standard IP21 = NEMA1 (air-cooled)
IP52 = NEMA12 (water-cooled)
– Optional IP42 (air cooling)
Cooling Type
Air-cooled Forced-air cooling with integrated fans
Permissible ambient and cooling temperature
– In operation 5ºC to +40ºC: 100% load capability
+40ºC to 50ºC: current derating
– During storage –5ºC to +45ºC
– During transport –25ºC to +70ºC
Water-cooled Deionized water with a choice of integrated
water-to-water heat exchanger or an outside
water-to-air heat exchanger
Permissible ambient temperature
– In operation +5ºC to +40ºC
– During storage –5ºC to +45ºC
(without deionized water)
– During transport –25ºC to +70ºC
(without deionized water)
Permissible cooling temperature (raw water)
– Intake +5ºC to 35ºC
Incoming Service
Standard 2.3 to 13.8 kV
Special option Below 2.3 kV and above 13.8 kV
Control voltage 1 Ph, 120 VAC or integrated to
auxiliary supply
Cooling 3 Ph, 480 VAC or other
Output Parameters
Rated Motor Voltage Single-Drive Configuration
Maximum output frequency –
330 Hz (with derating).
Speed-control range – 1:200
(with encoder).
2.3 kV 3.3 kV 4.16 kV 6.0 kV 6.6 kV 11 kV
Output
Current
Output
kVA
Output
Current
Output
kVA
Output
Current
Output
kVA
Output
Current
Output
kVA
Output
Current
Output
kVA
Output
Current
Output
kVA
70 300 70 400 70 500 70 700 70 800 500 8000
100 400 100 600 100 700 100 1000 100 1000 800 15,000
140 500 140 800 140 1000 140 1500 140 1500 1400 25,000
200 800 200 1000 200 1500 200 2000 200 2000
260 1000 260 1500 260 1750 260 2500 260 3000
315 1250 315 1750 315 2000 315 3000 315 3500
375 1500 375 2000 375 2500 375 4000 375 4000
500 2000 500 2500 500 3500 500 5000 500 5500
660 2500 660 3500 660 4500 660 7000 660 7500
880 5000 880 6500 880 9000 880 9500
1250 7000 1250 9000 1250 13,000 1250 14,000
13.8 kV
Output
Current
Output
kVA
50 10,000
800 18,000
1400 31,000
ROBICON Perfect Harmony
In Synch with Your Business
Goals
• Lower operating costs
• Precise process control
• Lower maintenance costs
• Increased production efficiency
• Exceptional reliability
• Intuitive HMI
Technical Specifications
14 15
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
UNITED STATES
www.siemens.com/robicon-perfect-harmony
Subject to change without prior notice
Order No: LABR-00300-1008
10M1008TM
Printed in USA
© Siemens Energy & Automation, Inc.
The information provided in this brochure contains merely general
descriptions or characteristics of performance which in actual case of
use do not always apply as described or which may change as a result
of further development of the products. An obligation to provide the
respective characteristics shall only exist if expressly agreed in the
terms of contract.
All product designations may be trademarks or product names of
Siemens AG or supplier companies whose use by third parties for their
own purposes could violate the rights of the owners.
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