Siemens Micromaster Eco User manual

HVAC-Frequency Inverter
from 1.1 kW to 90 kW
MICROMASTER Eco &
MIDIMASTER Eco
Reference Manual

ECO REFERENCE MANUAL
1
CONTENTS
Section 1 1. SAFETY AND COMPLIANCE.........................................................1-1
Section 2 2. INTRODUCTION.............................................................................2-1
PRODUCT DESCRIPTION AND APPLICATIONS....................2-1
Eco OPERATING INSTRUCTION MANUAL.............................2-1
Eco REFERENCE MANUAL......................................................2-1
Section 3 3. PRINCIPLES OF INVERTER OPERATION....................................3-1
INTRODUCTION........................................................................3-1
VARIABLE SPEED DRIVES ......................................................3-1
VARIABLE FREQUENCY INVERTER.......................................3-4
Section 4 4. ADVANTAGES OF THE Eco ..........................................................4-1
ENERGY SAVINGS ...................................................................4-1
CONTROL & REGULATION......................................................4-1
PID - INTERNAL ........................................................................4-1
NOISE........................................................................................ 4-1
WEAR & TEAR ..........................................................................4-2
EQUIPMENT RATIONALISATION ............................................ 4-2
OUTSTATION CAPABILITY WITH RS485 SERIAL
COMMUNICATION....................................................................4-2
Section 5 5. TECHNICAL OVERVIEW & SUMMARY TABLE ............................5-1
STANDARD FEATURES ........................................................... 5-1
TECHNICAL FEATURES........................................................... 5-2
Section 6 6. ENERGY SAVING PROGRAM.......................................................6-1
ENERGY CONTROL OPTIMIZATION (P077)...........................6-1
Section 7 7. PULSE WIDTH MODULATION (PWD) OUTPUT METHOD..........7-1
SWITCHING FREQUENCY FOR LOW MOTOR NOISE..........7-1
Section 8
SC
8. Eco SELECTION CRITERIA - SIZE, TYPE ETC............................8-1
OVERALL CONSIDERATIONS ................................................. 8-1
SUPPLY SIDE REQUIREMENTS..............................................8-1
SUPPLY TOLERANCE ..............................................................8-1
SUPPLY DISTURBANCE ..........................................................8-2
UNGROUNDED SUPPLIES.......................................................8-3
LOW FREQUENCY HARMONICS ............................................ 8-3
MICROMASTER Eco.................................................................8-3
MIDIMASTER Eco......................................................................8-3
EMC FILTER RESTRICTIONS FOR ALL PRODUCTS.............8-3
MOTOR LIMITATIONS..............................................................8-6
LOAD CONSIDERATIONS........................................................8-8
VARIABLE TORQUE APPLICATIONS......................................8-9
OTHER LOADS........................................................................8-10
ENVIRONMENTAL CONSIDERATIONS.................................8-11
IP PROTECTION ..................................................................... 8-11

ECO REFERENCE MANUAL
2
Section 9 9. MECHANICAL INSTALLATION......................................................9-1
SAFETY INFORMATION AND ENVIRONMENTAL
REQUIREMENTS ...................................................................... 9-2
CLEARANCES AND DIMENSIONS - MICROMASTER Eco.....9-3
CLEARANCES AND DIMENSIONS - MIIDMASTER Eco..........9-5
Section 10 10. ELECTRICAL INSTALLATION......................................................10-1
SAFETY INFORMATION AND GENERAL GUIDELINES .......10-1
POWER AND MOTOR CONNECTIONS - MIDIMASTER Eco
RANGE.....................................................................................10-3
POWER AND MOTOR CONNECTIONS - MICROMASTER Eco
RANGE.....................................................................................10-3
RECOMMENDED FUSES AND RATINGS.............................. 10-5
DIRECTION OF ROTATION....................................................10-6
STAR OR DELTA MOTOR CONNECTION.............................10-6
MULTI-MOTOR CONNECTION .............................................. 10-6
MOTOR OVERLOAD PROTECTION......................................10-6
MICROMASTER Eco...............................................................10-7
MIDIMASTER Eco....................................................................10-7
Section 11
EG
11. APPLICATION EXAMPLES .......................................................... 11-1
Section 12
EMC
12. EMC GUIDELINES........................................................................12-1
ELECTRO-MAGNETIC COMPATIBILITY (EMC).................... 12-1
ELECTRO-MAGNETIC INTERFERENCE (EMI).....................12-6
WIRING GUIDELINES TO MINIMISE EFFECTS OF EMI.......12-7
FRAME SIZES 4 TO 7 .............................................................12-9
Section 13 13. PROGRAMMING ..........................................................................13-1
KEYPAD...................................................................................13-1
DIP SELECTOR SWITCHES................................................... 13-1
PARAMETER TYPES..............................................................13-2
PARAMETER RANGES...........................................................13-2
ACCESSING PARAMETERS AND CHANGING VALUES......13-3
DISPLAY MODE PARAMETERS.............................................13-3
BASIC MODE PARAMETERS................................................. 13-4
EXPERT MODE PARAMETERS ............................................. 13-6
FAULT CODES......................................................................13-24
PID PROCESS CONTROL....................................................13-26
HARDWARE SET-UP............................................................13-26
PARAMETER SETTINGS......................................................13-27
Section 14
D-R
14. DE-RATING INFORMATION ........................................................ 14-1
THERMAL PROTECTION AND AUTOMATIC DE-RATING....14-1
MAXIMUM MOTOR CABLE LENGTHS...................................14-1
MAXIMUM OUTPUT CURRENT AT ELEVATED
TEMPERATURES - VARIABLE TORQUE APPLICATIONS...14-3
MAXIMUM OUTPUT CURRENT WITH LONG UNSCREENED
CABLES - VARIABLE TORQUE APPLICATION.....................14-4
MAXIMUM OUTPUT CURRENT WITH LONG SCREENED
CABLES - VARIABLE TORQUE APPLICATIONS................... 14-5
VOLTAGES AND CURRENT DE-RATING WITH
RESPECT TO ALTITUDE........................................................14-6

ECO REFERENCE MANUAL
3
Section 15 15. OPTIONS......................................................................................15-1
CLEAR TEXT OPERATING PANEL OPE ...............................15-1
EMC FILTERS.......................................................................... 15-4
INPUT EMC FILTER ORDER NUMBERS............................... 15-4
INSTALLATION OF FILTERS..................................................15-6
HARMONIC INPUT CHOKES................................................ 15-14
INPUT CHOKE ORDER NUMBERS......................................15-15
4EP THREE-PHASE LINE REACTORS................................15-17
OUTPUT CHOKES................................................................15-20
OUTPUT CHOKE ORDER NUMBERS..................................15-20
INSTALLATION OF OUTPUT CHOKES ............................... 15-21
OUTPUT CHOKES (IRON CORE) ........................................15-21
OUTPUT CHOKES (FERRITE CORE)..................................15-22
OUTPUT REACTORS (FERRITE CORE).............................15-23
DV/DT OUTPUT FILTERS.....................................................15-24
INSTALLATION OF DV/DT OUTPUT FILTERS.................... 15-25
Section 16 16. SCOPE............................................................................... 16-1
TABLE OF CONTENTS........................................................... 16-2
1. GENERAL............................................................................ 16-3
2. DESIGN................................................................................16-3
3. QUALITY ASSURANCE & STANDARDS............................16-4
4. PERFORMANCE REQUIREMENT......................................16-5
5. BASIC PARAMETER SETTINGS....................................... 16-5
6. EXPERT / ADVANCED PARAMETER SETTINGS .............16-6
7. PROTECTION FUNCTIONS AND FEATURES...................16-6
8. CONTROL SIGNALS...........................................................16-7
9. COMMUNICATIONS............................................................ 16-7
10. HARMONICS ON MAINS SUPPLY SYSTEM.................... 16-8
11. ELECTROMAGNETIC COMPATIBILITY (EMC) ...............16-8
12. OUTPUT CHOKES............................................................16-9
13. COMMISSIONING & DOCUMENTATION.........................16-9
14. PREFERENCE................................................................... 16-9
Section 17 17. YOUR PARAMETER SETTINGS....................................................... 1
PARAMETER SUMMARY CHART............................................... 2

ECO REFERENCE MANUAL
1-1
1. SAFETY AND COMPLIANCE
Before installing and putting this equipment into
operation, read these safety instructions and
warnings carefully. Also read and obey all the
warning signs attached to the equipment. Make
sure that the warning labels are kept in a legible
condition and replace any missing or damaged
labels.
Warning
This equipment contains dangerous
voltages and controls dangerous
rotating mechanical parts. Loss of life,
severe personal injury or property
damage can result if the instructions
contained in this manual are not
followed.
Only suitably qualified personnel should work on this
equipment, and only after becoming familiar with all
safety notices, installation, operation and
maintenance procedures contained in this manual.
•Use only permanently-wired input power
connections. The equipment must be
grounded (IEC 536 Class 1, NEC and other
applicable standards)
•Use only Residual Current-operated protective
Device (RCD) type B if an RCD is required
•Wait at least five minutes after the power has
been turned off, before opening the equipment.
The dc-link capacitor remains charged to
dangerous voltages even when the power is
removed. When working on equipment with
covers removed, note that live parts are exposed
and do not touch these parts
•Do not connect machines with a three-phase
power supply, fitted with EMC filters, to a
supply via an ELCB (Earth Leakage Circuit
Breaker - see DIN VDE 0160, section 6.5)
•Note that certain parameter settings may
cause the inverter to restart automatically
once power is restored following an input
supply failure.
•Do not use this equipment as an “emergency
stop” mechanism (see EN 60204, 9.2.5.4)
•Obey all general and regional installation and
safety regulations relating to work on high
voltage installations, as well as regulations
covering correct use of tools and personal
protective equipment
•Note that the following terminals can carry
dangerous voltages even when the inverter is
inoperative:
Power supply terminals L/L1, N/L2 and L3
MICROMASTER Eco. L1, L2 and L3
MIDIMASTER Eco
Motor terminals U, V and W
DC link terminals B+/DC+ and B-
MICROMASTER Eco. DC+ and DC-
MIDIMASTER Eco
•This equipment is capable of providing internal
motor thermal overload protection in
accordance with section 42 of UL508C.
Please refer to P074. An external PTC may
also be used (refer to electrical installation).
•This equipment is suitable for use in a circuit
capable of delivering not more than 100,000
symmetrical amperes (rms), for a maximum
voltage of 230/460V* when protected by a
time delay fuse*
* As detailed in sections 9.1 and 10.5
respectively.
•Do not operate the motor with a higher
nominal power than the inverter, or a nominal
power less than half the inverter. Only operate
the inverter when the nominal current in P083
exactly matches the motor rating plate
nominal current
•Enter the motor data parameters (P080-P085)
and do an auto-calibration (P088) before the
motor is started. Unstable/unpredictable motor
operation (e.g. Reverse rotation) may result if
this is not done. If this instability occurs, the
mains supply to the inverter must be
disconnected.
•When using the analogue input, the DIP
switches must be correctly set and the
analogue input type selected (P023) before
enabling the analogue input with P006. If this
is not done the motor may start inadvertently.

ECO REFERENCE MANUAL
1-2
Caution
•Do not allow children or the general public to access of approach this equipment
•Do not install the inverter where it will be subject to shock, vibration, electro-magnetic
radiation, water hazards, or atmospheric pollutants such as dust or corrosive gases.
•Keep operating instructions within easy reach and give them to all users
•Use this equipment only for the purpose specified by the manufacturer. Do not carry out
any modifications, or fit any spare parts which are not sold or recommended by the
manufacturer; this could cause fires, electric shock or other injuries.
EUROPEAN LOW VOLTAGE DIRECTIVE
The MICROMASTER Eco and MIDIMASTER Eco product range complies with the
requirements of the Low Voltage Directive73/23/EEC as amended by Directive 93/68/EEC. The
units are certified for compliance with the following standards:
EN 60146-1-1 Semiconductor converters - EN 60204-1 Safety of machinery -
General requirements and Electrical equipment
line commutated converters of machines
EUROPEAN MACHINERY DIRECTIVE
The MICROMASTER Eco and MIDIMASTER Eco product range do not fall under the scope of
the Machinery Directive. However, the products have been fully evaluated for compliance with
the essential Health & Safety requirements of the directive when used in a typical machine
application. A declaration of incorporation is available on request.
EUROPEAN EMC DIRECTIVE
When installed according to the recommendations described in this manual, the
MICROMASTER Eco and MIDIMASTER Eco product range fulfil all requirements of the EMC
Directive as defined by the EMC Product Standard for Power Drive Systems EN 61800-3
UL and CUL listed power conversion
equipment for use in pollutuion degree 2
environment
ISO 9001
Siemens plc operates a quality management system which complies with the requirements of ISO
9001.

ECO REFERENCE MANUAL
2-1
2. INTRODUCTION
PRODUCT DESCRIPTION AND
APPLICATIONS
The MICROMASTER Eco and MIDIMASTER Eco
provides a range of variable frequency speed
controllers (inverters) specifically developed for
the Heating, Ventilation & Air Conditioning
(HVAC) industry.
Key design features include:
•Automatic energy optimisation
•Motor thermal overload protection
•Automatic switching frequency optimisation for
minimised acoustic noise generation
•Zero de-rating of motor
•Automatic motor tuning at switch-on
•Earth fault protection
•Short circuit protection
•Built-in chokes allow use of up to 150 metre
motor cables
The ability to easily control the speed of pump or
fan motors provides superior regulation and
control of the process, enabling optimisation of
room temperatures and personal comfort levels.
The Eco range combines ease of installation and
commissioning with low maintenance and
operating costs. In addition, the specific HVAC
product functionality (compared with similar
products aimed at “Hi-Tech” multiple applications)
means that product costs can be minimised, and
the user does not pay for features which are not
required.
Day-to-day operating costs can be drastically
reduced - up to 60% in some applications. Energy
consumption and associated emissions are also
reduced to the lowest possible levels.
ECO OPERATING INSTRUCTION
MANUAL
The Eco Operating Instructions booklet (which
should be read in conjunction with this manual)
provides basic information on equipment
installation and programming, to control the
functions of fans and pump motors. It is aimed at
HVAC Installation Technicians and Electricians
working and commissioning on-site, and is
intended to provide a quick, straightforward guide
to installing and simple operating of the Eco units.
ECO REFERENCE MANUAL
This Manual - The Eco Reference Manual is
intended for use by a wide range of HVAC
professionals. For example, the Eco Reference
Manual is to be used by Building Automation
Engineers to plan their equipment and cabling
schedules and estimate their material
requirements. It may also be used by HVAC
Consultants in order to compile the relevant
portions of their tender specification.
The Eco Reference Manual should also be useful
to electrical panel builders, building automation
control engineers, quantity surveyors / estimators,
electrical project managers, and maintenance
contractors.

ECO REFERENCE MANUAL
3-1
3. PRINCIPLES OF INVERTER OPERATION
INTRODUCTION
This section of the manual is intended to help
first-time users of variable speed drives to
understand basic principles of operation, and gain
some insight into successful installation and
application of the MICROMASTER Eco range of
Variable Speed Drives.
VARIABLE SPEED DRIVES
A Variable Speed Drive (VSD) system consists of
a Motor and some form of speed controller.
History
Early electric VSDs consisted of AC and DC
motor combinations which were used as rotating
AC to DC converters. The DC supply was used to
drive the DC motor at variable speed by
controlling the field current in the DC generator to
vary the DC voltage to the DC motor.
The first electronic controllers used Thyristor
(SCR) Rectifiers which controlled the voltage, and
therefore the speed of DC motors. These DC
VSDs are still widely used and offer very
sophisticated control capability. However, the DC
motor is large, expensive and requires periodic
brush maintenance.
Present day
The AC induction motor is simple, low cost,
reliable and widely used throughout the world. In
order to control the speed of an AC induction
motor a more complex controller, which varies
the frequency as well as the voltage, usually
called an inverter is required.
Induction motor
In order to understand how an inverter works, it is
first necessary to understand how an induction
motor works.
An asynchronous induction motor works like a
transformer. When the stator (the fixed, outer
winding) is connected to a three phase power
source, a magnetic field which rotates at the
frequency of the supply is set up.
Air gap
Rotor
Shaft
1
2
3
1
2
3Stator windings
Simplified Induction Motor - Cross Section

ECO REFERENCE MANUAL
3-2
This field crosses the air gap between the stator
and rotor and causes currents to flow in the rotor
windings. This produces a force (torque) on the
rotor as the current interacts with the changing
magnetic field, and the rotor turns.
If the windings are arranged in several pairs (or
poles), the frequency of the rotating field will be
less than the applied frequency (e.g. two pole =
50/60Hz = 3000/3600 rpm, but four pole =
50/60Hz = 1500/1800 rpm).
However, if the rotor runs at the same speed as
the rotating field, there will be no changing
magnetic field, and therefore no torque.
Since rotor currents must be induced in order to
create output torque, the rotor always runs a little
slower than the rotating field. This difference in
speed is known as slip and is generally about 3%.
Pull out
(maximum) torque
Torque
Speed
Normal operating
point
Slip
Variable frequency
operation
Torque Speed Characteristic of An Induction Motor
The speed of the motor depends on the applied
frequency, as well as the winding arrangement,
and to some extent on the load.
Therefore in order to control the motor speed it is
necessary to control the frequency of the supply.
If the frequency is reduced, the voltage must be
reduced, or the stator current and magnetic flux
will be too high and the motor’s magnetic field will
saturate. Hence the voltage must be controlled as
well.
If the frequency is increased above normal, more
voltage would normally be needed to maintain
maximum flux; this is not usually possible, so less
torque is available at high speed, (i.e. speeds
above the supply frequency).

ECO REFERENCE MANUAL
3-3
Torque
Speed (X 50/60)
Torque capability
Flux, voltage
0 0.5 1.0 1.2 1.5
Torque Reduction above Base Speed
Therefore in order to control the speed of a
standard AC motor, the applied frequency and
voltage must be controlled.
The use of a standard induction motor together
with a variable frequency speed controller allows
a cost effective speed control system to be built.

ECO REFERENCE MANUAL
3-4
VARIABLE FREQUENCY INVERTER.
An electronic converter which converts Direct
Current (DC) to Alternating Current (AC) is known
as an inverter. Electronic speed controllers for AC
motors usually convert the AC supply to DC using
a rectifier, and then convert it back to a variable
frequency, variable voltage AC supply using an
inverter bridge. The connection between the
rectifier and inverter is called the DC link. The
block diagram of a speed controller (often called
an inverter) is shown below:
Supply
Rectifier DC Link Inverter
CC
Inverter Block Diagram

ECO REFERENCE MANUAL
3-5
The three phase supply is fed into a full wave
rectifier which supplies the DC link capacitors.
The capacitors reduce the voltage ripple
(especially on single phase supplies) and supply
energy for short mains breaks. The voltage on
the capacitors is uncontrolled and depends on the
peak AC supply voltage.
MICROMASTER Eco &
MIDIMASTER Eco inverters are
available as three phase.
The DC voltage is converted back to AC using
Pulse Width Modulation (PWM). The desired
waveform is built up by switching the output
transistors (Insulated Gate Bipolar Transistors;
IGBTs) on and off at a fixed frequency (the
switching frequency). By varying the on and off
time of the IGBTs the desired current can be
generated. The output voltage is still a series of
square wave pulses and the inductance of the
motor windings results in a sinusoidal motor
current. Pulse Width Modulation is shown in the
figure below.
Current
Time
Voltage
DIAGRAM AND
TEST RESULTS
OV
Pulse Width Modulation

ECO REFERENCE MANUAL
4-1
4. ADVANTAGES OF THE ECO
ENERGY SAVINGS
The Eco range provides considerable potential for
energy saving in the following areas:
•Air flow requirements are matched precisely to
demand.
•Optimum system regulation means less
energy/power is required.
•The requirement for changing clean air filters
is reduced.
ENERGY SAVING POTENTIAL
power (kW)
Fixed speed
with damper
Eco
flow (m
3
/min)
CONTROL & REGULATION
The Eco range enables the following
improvements to system control and regulation.
•Finer control of system functions as the Eco
accurately follows set points.
•Closed loop process control using a standard
Proportional, Integral, Derivative (PID) control
loop function.
•Reduced overshoot of pre-set parameters,
provides optimised levels of comfort.
•Automatic compensation for system
fluctuations - partially blocked filters.
setpoint
feedback
PID CONTROL
Eco PID
controller M
Sensor
PID - INTERNAL
Closed loop process control using a standard
Proportional, Integral, Derivative (PID) control
loop function. 15 V, 50 mA supply provided for
feedback transducer
NOISE
Noise reductions can be achieved by reduction in:
•Motor and fan rpm.
•Air flow velocity
•Balance dampers are set in a more open
position.
•Periodic on/off actions create a higher and
more irritating noise level than continuous
running

ECO REFERENCE MANUAL
4-2
WEAR & TEAR
Eco inverters can make possible greatly reduced
maintenance and running costs:
•Fewer stop/start sequences means that
mechanical stresses are reduced.
•Equipment life is extended, and a smaller
number of components require reduced
degree of maintenance
•Reduced airflow means reduced cleaning.
•Reduction in replacement of maintenance
consumables such as fan belts, motor
bearings and fan bearings.
STARTING TORQUE
torque (Nm)
100%
direct-on-line
Eco
speed (rpm)starting torque
EQUIPMENT RATIONALISATION
Using Eco inverters can significantly reduce the
number of system components and often enable
valuable space to become available:
•Mechanical components which may be
eliminated include dampers, actuators, (and
outstations by using serial communication).
•Reductions in the use of electrical contactors,
control and overload relays, terminals and PID
modules can be achieved. Also, control panel
complexity is reduced, as is wiring and labour
costs.
OUTSTATION CAPABILITY WITH
RS485 SERIAL COMMUNICATION
Remote control capability via RS485 serial link
using the USS protocol with the ability to control
up to 31 inverters via the USS protocol.

ECO REFERENCE MANUAL
5-1
5. TECHNICAL OVERVIEW & SUMMARY TABLE
The MICROMASTER Eco and MIDIMASTER Eco
inverters are intended for use anywhere in the
world and therefore support a wide range of
mains voltages:
3 phase 208 - 240V±10%
3 phase 380 - 500V±10%
3 phase 525 - 575V±15% (MIDIMASTER Eco
only)
STANDARD FEATURES
•Easy to install program and commission.
•Fast Current Limit (FCL) for reliable trip-free
operation.
•to 50°C temperature range (0 to 40°C for
MIDIMASTER Eco).
•Factory default parameter settings pre-
programmed for European, Asian, and North
American requirements.
•Output frequency (and hence motor speed)
can be controlled by:
1. frequency setpoint using the keypad
2. High resolution analogue setpoint (voltage
or current input)
3. External potentiometer to control motor
speed
4. 8 fixed frequencies via binary inputs
5. Motorised potentiometer function (raise
and lower speed pushbuttons)
6. Serial RS485 interface
•Acceleration/deceleration times.
•Two fully-programmable relay outputs (13
functions).
•Fully-programmable analogue outputs (1 for
MICROMASTER Eco, 2 for MIDIMASTER
Eco).
•External options connector for optional multi-
language Clear Text Display (OPe).
•Dual Motor-parameter sets available if Clear
Text Display option (OPe) is fitted.
•Integral software controlled cooling fan.
•Side by side mounting without additional
clearance. (IP20/21 models).
•Optional protection to IP56 (NEMA 4/2) for
MIDIMASTER Eco inverters.
•Standard open loop quadratic V/F Control,
ideal for simple applications such as pumps
and fans.
•Range of drives benefits from the standard
inclusion of a PID controller for closed loop
system regulation.
•All products make use of the same, simple to
use, standard user interface consisting of
push buttons and LED display.
•User-friendly screwless terminals used for
control connections. (MICROMASTER Eco
only)
•RS485 serial interface is standard, allowing up
to 31 drives to be networked to a PLC or
Building Management System (BMS).
•Drive can be enabled via keypad, via digital
inputs or via standard RS485 serial interface.
•Motor speed set-point can be selected, using
a digital set-point, motorised potentiometer,
fixed frequency, analogue input or via the
RS485 serial link.
•Mixed mode control is also available, allowing
drive control and setpoint input to be from
different sources.
•Drives can be configured to start automatically
following a mains break or after a fault.
•Parameter sets are fully compatible between
different product types, reducing learning time.
•All drives are certified in accordance with
VDE, UL and Canadian UL, and are
manufactured to ISO9001.
•All drives conform to the requirements of the
EC low voltage directive 73/23/EEC and have
been awarded the CE mark.

ECO REFERENCE MANUAL
5-2
TECHNICAL FEATURES
Inverter MICROMASTER Eco MIDIMASTER Eco
Input Vol tage 3 AC 208 - 240V±10%
3 AC 380 - 500V±10% 3 AC 208 - 240V±10% 3 AC 380V - 500V±10%
3 AC 525V - 575V±15%
Power Ranges
3 AC 208-240V
3 AC 380-500V
3 AC 525-575V
1.1kW - 4.0kW
1.1kW - 7.5kW
-
5.5kW - 45kW (1.1kW - 45kW) IP56
11kW - 90kW (3kW - 90kW) IP56
4kW - 45kW (4kW - 45kW) IP56
Protection Level IP20/NEMA1 IP21/NEMA1 or IP56 / NEMA 4/12 or
IP20 /NEMA1 with integrated Class A EMC
filter
EMC conformance
EN55011 Class A
3 AC 208-240V
3 AC 380-460V
3 AC 525-575V
Footprint Filter
Footprint Filter
not available
Integrated or external Filter
Integrated or external Filter
not available
EMC conformance
EN55011 Class B
3 AC 208-240V
3 AC 380-460V
3 AC 525-575V
Footprint Filter
Footprint Filter
not available
External Filter
External Filter
not available
Temperature
Range 0 - 500C0-40
0C See Section 14 for derating at
higher temperatures
Control Method Energy Control Optimisation (Eco) Mode or Multi-motor Mode.
Protection Features Undervoltage, Overvoltage, Overload, Short-Circuit, Earth Fault, Motor Pull-
out, Motor Overtemperature, Drive Overtemperature
Maximum Motor
Cable Length See section 14 See Section 14
Overload Capability 150% for 60 sec 110% for 60 sec
Digital Inputs 6 configurable 6 configurable
Fixed Frequencies 8 8
Relay Outputs 2 configurable (230V AC/1.0A) 2 configurable (230V AC/1.0A)
Analogue Inputs 2 2
Analogue Outputs 1 configurable 2 configurable
Serial Interface RS485
Dynamic Braking Compound Braking
DC Injection Braking Compound Braking /DC Injection Braking
Process Control PID PID

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6-1
6. ENERGY SAVING PROGRAM
ENERGY CONTROL OPTIMIZATION
(P077)
This feature provides :
•“Energy Control Optimization” (Eco)
•Automatically increases and decreases motor
voltage in order to search for the minimum
power consumption
•Operates when the setpoint speed is reached
•Factory default setting
voltage (V)
voltage (V)
frequency (Hz)
optimum
efficiency
The Eco starts to analyse the power consumption
of the motor as soon as the motor has reached
setpoint speed (i.e. when acceleration is
complete).
It then begins to search for the optimum
efficiency (lowest power consumption) by slightly
lowering or raising the output voltage to the
motor.
For example, if the Eco detects that the power
consumption is increasing as it is increasing the
voltage to the motor, then the control strategy will
begin to decrease the output motor voltage in
search of the lowest power consumption level.
The converse of this will also apply, again to
automatically determine the lowest power
consumption level.
The Control Mode (P077=4) is set to Energy
Control Optimisation as the factory default.
The amount of additional energy saved using this
optimisation technique can vary considerably and
is dependent on motor loading, motor type and
duty cycle. Typical additional savings can be
between 2% and 5%.

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7-1
7. PULSE WIDTH MODULATION (PWD) OUTPUT METHOD
0V
Time
Pulse Width Modulation
Voltage
Current
SWITCHING FREQUENCY FOR LOW
MOTOR NOISE
•PWM (pulse width modulation) switching
frequency adjustable from 2kHz to 16kHz
•16kHz above audible frequency
•The pulse width modulation (PWM) switching
frequency used is proportional to the heating
and energy losses within the inverter. The
higher the switching frequency the greater is
the amount of heat produced by the inverter
output devices (IGBTs). An overtemperature
trip can result if the inverter is operating close
to its maximum rated temperature and is fully
loaded.
•The Eco unit automatically optimizes switching
frequency whenever possible for motor noise
reduction
•Lowers switching frequency if heat sink
temperature exceeds limits
•Once heat sink temperature returns to normal,
switching frequency returns to setting
Larger MIDIMASTER Eco units may be restricted
from operating above 4kHz. Refer to parameter
P076 which shows output current restrictions
associated with switching frequency.

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SC
8. Eco SELECTION CRITERIA - SIZE, TYPE ETC.
Generally, drive selection is straightforward, as the motor rating is already known and the speed range
requirements are either pre-determined, or easily identified and accomplished. However, when a drive
system is selected from first principles, careful consideration may avoid problems in installation and
operation, and may also generate significant cost savings.
OVERALL CONSIDERATIONS
•Make sure that the Current rating of the
inverter is compatible with the name plate
current rating of motor - power rating can be
used as a rough guide.
•Check that you have selected the correct
operating voltage and that the motor terminals
are configured correctly.
•Make sure that the speed range you require is
attainable. Operation above normal supply
frequency (50 or 60Hz) is usually only possible
at reduced power. Operation at low frequency
and high torque (not normally a characteristic
of fans and pumps) can cause the motor to
overheat unless provision is made for
additional cooling.
•Do you need to operate with cables longer
than 100m, or screened or armoured cables
longer than 50m ?. If so, it may be necessary
to de-rate the inverter, or fit a choke to
compensate for the cable capacitance. See
section 14 for motor cable length details.
•The Eco is only intended for use with
centrifugal pumps and fans see p 8-8 for
further information.
SUPPLY SIDE REQUIREMENTS
To achieve maximum reliability and optimum
performance, the main power supply to the
inverter system must be suited to the inverter.
The following points should be considered:
SUPPLY TOLERANCE
The inverters are designed to operate on a wide
range of supply voltages as follows:
208 - 240 V +/- 10% i.e. 187-264V
380 - 500 V +/- 10% i.e. 342-550V
525 - 575 V +/- 15% i.e. 472-633V
Inverters will operate over a supply frequency of
47 - 63 Hz
Many supplies vary outside these levels. For
example:
•Supply voltages at the end of long power lines
in remote areas can rise excessively in the
evening and weekends when large loads are
no longer present.
•Industries with locally controlled and
generated supplies can have poor voltage
regulation and control.
•Power systems in certain parts of the world
may not meet the inverter input voltage
tolerances.
In all installations, check that the supply will
remain within the voltage tolerances stated
above. Operation outside of the stated supply
levels may cause damage and give unreliable
operation.

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SC
SUPPLY DISTURBANCE
Many supplies are well controlled and remain in
tolerance, but are affected by local disturbances.
These can cause faulty operation and damage to
inverters. In particular, check for:
•Power Factor Correction equipment.
Unsuppressed switching of capacitor banks
can produce very large voltage transients and
is a common cause of inverter damage.
•High power welding equipment, especially
resistance and RF welders.
•Other drives, semiconductor heater controllers
etc.
The inverter is designed to absorb a high level of
supply disturbance - for instance, voltage spikes
up to 2kV. However, the above equipment can
cause power supply disturbances in excess of
this. It will be necessary to suppress this
interference - preferably at source - or at least by
the installation of an input choke in the inverter
supply. EMC filters do not suppress disturbances
with this level of energy. Over-voltage protection
products such as metal oxide varistors should
also be considered in extreme cases.
Damage can also be caused by local supply
faults and the effects of electrical storms. In
areas where these are expected, similar
precautions are recommended.
Add input choke and
over voltage protection
equipment here
MICROMASTER Eco
Power factor
correction
equipment
Welders
RF heaters
etc.
Lightning, power
system faults
Large drives
and power
electronic
systems
Motor