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www.siemens.com/energysaving
Drive technology that unlocks new potential
| Pumps, fans and compressors are often
controlled based on traditional and tried and tested control procedures. A
decisive disadvantage: The motor is constantly running at rated speed with
maximum flow rate – although this is rarely required in practice. The
result: continuous operation with a high power loss, e. g. throttle control.
In variable-speed operation with a frequency drive, however, a great amount
of energy can be saved.
Frequency drives saves additionally by adapting to the optimum operating point. Variable-speed drives depend on the type of driven machine. This is where optimized machines for as pumps, fans or compressors show their “economical side”.
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SINAMICS G150 and SINAMICS G130 frequency drives:
At a glance: |
- Output range from 75 kW to 1500 kW
- Voltage classes: 400 V, 500 V and 690 V
- Compact and quiet, thanks to state-of-the-art IGBT power semiconductors and an innovative cooling concept: With a footprint that is up to 70 % smaller than for conventional frequency drives and noise-level values of only 69 db(A) when operating with max. output
- Depending on requirements, cabinet units are available with or without power supply components and chassis units
- Increased plant availability thanks to the service-friendly concept with easy access and a straightforward, modular design
- Can be easily integrated in higher-level automation systems via a standard PROFIBUS interface and various analog and digital interfaces
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- Easy commissioning and parameterization, menu-prompted at the AOP 30 advanced operator panel with LCD and plain text display with graphics capability
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SINAMICS G120 frequency drive
At a glance:
The SINAMICS G120 with the innovative Power Module PM250 and PM260 offer unprecedented energysaving potentials using line-commutated regenerative feedback. The amount of energy saved depends on the application. Instead of “burning” energy with a braking chopper and connected brake resistor, the PM250 and PM260 feed excessive energy from the process back into the power supply system, enabling considerable energy savings.
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- Power range 0.37 to 90 kW
- Voltage classes 400 V, 690 V
- Line-commutated regenerative feedback (PM250, PM260)
- Low system perturbations (PM250, PM260)
- Through the abolition of components like line-commutating reactors and braking choppers the required space in the control cabinet and the wiring costs will be reduced (PM250, PM260)
- Sophisticated vector control (speed/torque) for consistently high drive quality even in case of sudden load variations
- Torque control ensures fully controlled torque down to the lowest speed, even zero speed
- Over a Control Unit with Safety Integrated various safety functions- also without encoder- could be realized
- Comprehensive fault diagnostics, e.g. for evaluation of motor temperature for motor protection and temperature monitoring of the Power Module
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MICROMASTER Frequency drives
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At a glance:
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- Output range from 0.12 kW to 250 kW
- Voltage classes: 200 V to 240 V, 380 V to 480 V, and 500 V to 600 V
- Different control modes, from V/f control to vector control
- Compact housing and easy installation
Available with and without integrated EMC filter (in classes A and B)
- Guided commissioning
- High overload capability
- Modular system of expansion options
- CT (constant torque) and VT (square-law torque) can be dimensioned
- Load torque monitoring
- Compound braking for controlled rapid deceleration
- Integrated brake chopp
- Free function blocks
- 4 skip frequencies to avoid resonance and thus prevent damage to the machine
- Automatic restart
- Motor-friendly connection to rotating motor
- Evaluation of motor temperature for integrated motor protection
- Prepared for applications in IT systems
- Analog current/voltage inputs
- Parameterizable relay outputs
- Trockenlauferkennung bei Pumpenantrieben (belt failure detection)
- Control of multiple drives via PID controller (motor/pump staging) integrated as standard
- Dry run detection for pump drives (belt failure detection)
- Low-energy mode
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| Do you want to buy a new motor or overhaul an existing one? Then you should make a keen calculation. After all, one thing is certain: High energy costs will fully impact your operating costs. By reducing your operating costs, you can increase your profitability – and also make your production more environmentally-friendly. Our energy-saving motors demonstrate how economically and effectively some motors work. After all, these require less power for the same performance. We are happy to calculate how they can make you much more efficient. |
IEC motors - Save resources and money
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When developing our energy-saving motors, we took care to optimize the use of materials and to achieve high efficiency and long life. In this manner, we make a major contribution to the reduction of CO2 emissions and to the protection of the environment. Our energy-saving motors with efficiency class EFF1 not only comply with the relevant IEC standard but also with the strict U.S. federal legislation EPAct2. In this context, our EPAct motor series in 60 Hz design features a uniform electrical design according to NEMA MG1 and is
CC-certified. |
In addition to our portfolio for the Northern American market, we can offer
motors for your specific regional efficiency requirements upon request, whether
for Brazil, Taiwan, Japan or South Africa.
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- Status: Voluntary participation in efficiency classification
- Products covered: 2- and 4-pole 50 Hz squirrel cage motors 1.1 to 90 kW
- Required identification:
- Efficiency class on rating plate
- ηN ,η3/4-load and efficiency class is documented
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NEMA motors - Efficiency without limits
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Up to now, NEMA motors were distinguished by two efficiency classes:
energy-saving motors according to EPAct with 1 to 200 HP – as well as
energy-saving motors according to NEMA Premium with 1 to 400 HP. This is now
supplemented by a new generation of high-efficiency motors: Ultra NEMA
Premium. Equipped with copper die-cast rotors, they achieve even higher
efficiencies than NEMA Premium. Efficiency-relevant losses are minimized by
up to 10% – resulting in guaranteed minimum efficiencies within a tight
tolerance range. Our new Ultra NEMA Premium motors are especially suited for
operation on frequency drives according to NEMA MG 1-2003, Part 31.
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In addition to the grey iron casing for general-purpose and severe duty
applications, an aluminum housing is now also available for general purpose
applications. The motors are certified according to CE, CSA RU and also e.g.
NEMA Premium.
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- Status: EPAct, NEMA Premium and Ultra NEMA Premium efficiencies
- Covered products: 2-, 4- und 6-pole 60 Hz squirrel cage motors 1-200 HP (EPAct) and 1-400 HP (NEMA Premium)
- Identification: Nominal efficiency and guaranteed minimum efficiency are indicated on the rating plate (Ultra NEMA Premium)
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Our SinaSave software tool can show you how fast an investment in an EFF1 energy-saving motor or a frequency drive amortizes. Based on your plant characteristics, the program determines how much energy you’ll save in the specific application case. The amortization period is calculated based on the overall monthly savings and the purchase price of the motor or frequency drives. Many times the amortization period is just a few months.
The SinaSave energy-saving program has been developed for applications with motors in direct online operation (fixed speed) and in frequency drive operation (variable speed). With fixed speed, cost savings and payback time of the higher motor price for Siemens EFF1 energy-saving motors can be calculated based on the following three cases. Compared to…
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Siemens EFF2 energy-saving motors – Case 1
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Individually selected known motors – Case 2
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Known motors within the framework of a complete plant analysis – Case 3
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With variable speed, SinaSave considers all required system-specific parameters. Values required for the process are considered, such as flow rate and delivery head of pumps, mass flow rate and total pressure drop on fans and the density of the delivered medium, as well as the efficiency of the pumps and compressors, the electrical efficiency and the overall efficiency of the plant. Further basic data used by the program are the number of workdays and work shifts as well as the daily and annual output profile, which is decisive with respect to the energy savings effect.
First of all, the program uses the plant-specific basic data entered to determine the drive system with the required output and the price of a suitable frequency drive. In another step, the program determines the energy demand of the variablespeed drive system for the specific application and compares it with the calculated values of all possible alternative concepts for the respective plant, such as throttle valves, bypass, pre-rotation control or pole changing motors. Energy savings in kilowatt hours are derived from the resulting difference. The program converts this difference into actual cash value based on the currently valid power supply price for the plant.
The program calculates the payback period considering the price of the frequency drives, the decisive energy savings, and other cost-cutting effects of the variable-speed operation, such as improved power factor and machine-friendly operation.
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 Download Energysaving program SinaSave™ -Version 3.0.1.304 (7,0 MB) - March 2008
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More information
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