Cutler Hammer, Div of Eaton Corp H-Max Series Installation Guide
H-Max™ Series Adjustable Frequency Drive
Installation Manual
Effective September 2011
Supersedes August 2011
H-Max Series Adjustable Frequency Drive
Disclaimer of Warranties and Limitation of Liability
The information, recommendations, descriptions, and safety notations in this document are
based on Eaton Electrical Inc. and/or Eaton Corporation’s (“Eaton”) experience and judgment,
and may not cover all contingencies. If further information is required, an Eaton sales office
should be consulted.
Sale of the product shown in this literature is subject to the terms and conditions outlined in
appropriate Eaton selling policies or other contractual agreement between Eaton and the
purchaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR
MERCHANTABILITY, OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING
CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT STATES THE ENTIRE
OBLIGATION OF EATON. THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME
PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES. In no event will Eaton be
responsible to the purchaser or user in contract, in tort (including negligence), strict liability or
otherwise for any special, indirect, incidental, or consequential damage or loss whatsoever,
including but not limited to damage or loss of use of equipment, plant or power system, cost
of capital, loss of power, additional expenses in the use of existing power facilities, or claims
against the purchaser or user by its customers resulting from the use of the information,
recommendations, and descriptions contained herein.
The information contained in this manual is subject to change without notice.
Cover Photo: H-Max Series Drives
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H-Max Series Adjustable Frequency Drive
Support Services
The goal of Eaton is to ensure your greatest possible satisfaction with the operation of our
products. We are dedicated to providing fast, friendly, and accurate assistance. That is why
we offer you so many ways to get the support you need. Whether it’s by phone, fax, or
e-mail, you can access Eaton’s support information 24 hours a day, seven days a week.
Our wide range of services is listed below.
You should contact your local distributor for product pricing, availability, ordering, expediting,
and repairs.
Web Site
Use the Eaton Web site to find product information. You can also find information on local
distributors or Eaton’s sales offices.
Web Site Address
www.eaton.com/electrical
EatonCare Customer Support Center
Call the EatonCare Support Center if you need assistance with placing an order, stock
availability or proof of shipment, expediting an existing order, emergency shipments, product
price information, returns other than warranty returns, and information on local distributors
or sales offices.
Voice: 877-ETN-CARE (877-386-2273) (8:00 a.m.–6:00 p.m. Eastern Time U.S. [UTC –5])
FAX: 800-752-8602
After-Hours Emergency: 800-543-7038
(6:00 p.m.–8:00 a.m. Eastern Time U.S. [UTC –5])
If you are in the U.S. or Canada, and have OI or PLC questions, you can take advantage of our
toll-free line for technical assistance with hardware and software product selection, system
design and installation, and system debugging and diagnostics. Technical support engineers
are available for calls during regular business hours.
Drives Technical Resource Center
Voice: 800-322-4986 or +1 828-651-0984 (8:00 a.m.–5:00 p.m. Central Time U.S. [UTC –6])
Fax: +1 920-262-6070
e-mail: TRCDrives@Eaton.com
For Customers in Europe, Contact:
Eaton Industries GmbH
Electrical Sector
After Sales Service
Hein-Moeller-Str. 7-11
D-53115 Bonn
Phone: +49 (0) 228 6 02-3640
Fax: +49 (0) 228 6 02-61400
Hotline: +49 (0) 180 5 223822
e-mail: AfterSalesEGBonn@Eaton.com
www.moeller.net/aftersales
ii H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
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Table of Contents
SAFETY
Before Commencing the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Definitions and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazardous High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINEERING
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Power Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety and Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motor and Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYSTEM OVERVIEW
Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proper Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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H-Max Series Adjustable Frequency Drive
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H-MAX SERIES OVERVIEW
How to Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiving and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Catalog Number Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Ratings and Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION REQUIREMENTS
Standard Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEMA Type 1/12 Open Drives (1–250 hp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Wiring Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the Cable and Motor Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX A
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX B
Cable Power and Motor Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX C
Dimension Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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H-Max Series Adjustable Frequency Drive
List of Figures
Drive System (PDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Power Networks with Grounded Center Point
(TN-/TT Networks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMC Environment and Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Connection of Several Motors to One Frequency Inverter . . . . . . . . . . . . . . . .
Example of a Motor Ratings Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Star and Delta Circuit Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V/Hz-Characteristic Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Motor Control (Example) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-Max Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of the H-Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Diagram, Elements of H-Max Frequency Inverters . . . . . . . . . . . . . . . . . . . . . . . 10
Selection Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Rating Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Approval Sticker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Carton Labels (U.S. and Europe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mounting Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Input Power and Motor Cable Stripping Lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Wiring the AFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
H-Max Series Adjustable Frequency Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
EMC-Compliant Setup (Example: H-Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cable Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Locations of the EMC-Jumpers in Frames FS4 to FS6 . . . . . . . . . . . . . . . . . . . . . . . . . 33
Three-Phase Input Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Connection to Power Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Removing the Jumper, FS5 as Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Grounding Bar Location, FS8
Removing the EMC Jumper, FS7 and FS8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Detaching the DC Grounding Bus Bar from Frame, FS7 . . . . . . . . . . . . . . . . . . . . . . . . 36
Molex Connector Placement, FS9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Removing the EMC Jumper, FS9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Product Modified Sticker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
FS4 Dimension Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
FS4 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
FS5 Dimension Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
FS5 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
FS6 Dimension Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
FS6 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
FS7 Dimension Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
FS7 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
FS8 Dimension Drawing IP00 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
FS8 Dimension Drawing IP2154 Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
FS8 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
FS9 Dimension Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
FS9 Dimension Drawing IP2154 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
FS9 Dimension Drawing Flange Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
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H-Max Series Adjustable Frequency Drive
List of Tables
Identification on the Residual-Current Circuit-Breakers . . . . . . . . . . . . . . . . . . . . . . . . .
Assignment of Frequency Inverters to Example Motor Circuit . . . . . . . . . . . . . . . . . . .
Maintenance Measures and Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-Max Series Open Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEMA Type 1/IP21 or NEMA Type 12/IP54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NEMA Type 1/IP21 or NEMA Type 12/IP54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-Max Series Adjustable Frequency Drive Option Boards . . . . . . . . . . . . . . . . . . . . . .
Space Requirements for Mounting the H-Max Series AFD and Airflow . . . . . . . . . . . .
Mounting Drive Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Connection Tightening Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spacing Between Parallel Motor Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Cable Length by Frame Size without DV/DT Protected C2 Ratings . . . . . . .
Input Power and Motor Cable Stripping and Wire Lengths . . . . . . . . . . . . . . . . . . . . . .
International EMC Protection Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-Max Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard I/O Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relay Board 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Relay Board 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
North America Cable and Fuse Sizes—208–240 Vac Ratings . . . . . . . . . . . . . . . . . . . .
North America Cable and Fuse Sizes—380–480 Vac Ratings . . . . . . . . . . . . . . . . . . . .
International Cable and Fuse Sizes 380–480 Vac Ratings . . . . . . . . . . . . . . . . . . . . . . .
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7
12
16
17
18
18
20
21
23
23
23
24
32
39
41
42
42
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H-Max Series Adjustable Frequency Drive
Safety
Warning!
Dangerous Electrical Voltage!
Before Commencing the Installation
●
Disconnect the power supply of the device
●
Ensure that devices cannot be accidentally restarted
●
Verify isolation from the supply
●
Earth and short circuit the device
●
Cover or enclose any adjacent live components
●
Follow the engineering instructions (IL04020001E) for the
device concerned
●
Only suitably qualified personnel in accordance with
EN 50110-1/-2 (VDE 0105 Part 100) may work on this
device/system
●
Before installation and before touching the device ensure
that you are free of electrostatic charge
●
The functional earth (FE, PES) must be connected to the
protective earth (PE) or the potential equalization. The
system installer is responsible for implementing this
connection
●
Connecting cables and signal lines should be installed so
that inductive or capacitive interference does not impair
the automation functions
●
Install automation devices and related operating elements
in such a way that they are well protected against
unintentional operation
●
Suitable safety hardware and software measures should
be implemented for the I/O interface so that an open
circuit on the signal side does not result in undefined
states in the automation devices
●
Ensure a reliable electrical isolation of the extra-low
voltage of the 24V supply. Only use power supply units
complying with IEC 60364-4-41 (VDE 0100 Part 410) or
HD384.4.41 S2
●
Deviations of the input voltage from the rated value must
not exceed the tolerance limits given in the specifications,
otherwise this may cause malfunction and dangerous
operation
●
Emergency stop devices complying with IEC/EN 60204-1
must be effective in all operating modes of the automation
devices. Unlatching the emergency-stop devices must not
cause a restart
●
Devices that are designed for mounting in housings or
control cabinets must only be operated and controlled
after they have been installed and with the housing closed.
Desktop or portable units must only be operated and
controlled in enclosed housings
●
Measures should be taken to ensure the proper restart of
programs interrupted after a voltage dip or failure. This
should not cause dangerous operating states even for a
short time. If necessary, emergency-stop devices should
be implemented
●
Wherever faults in the automation system may cause
injury or material damage, external measures must be
implemented to ensure a safe operating state in the event
of a fault or malfunction (for example, by means of
separate limit switches, mechanical interlocks, and so on)
●
Depending on their degree of protection, adjustable
frequency drives may contain live bright metal parts,
moving or rotating components, or hot surfaces during and
immediately after operation
●
Removal of the required covers, improper installation, or
incorrect operation of motor or adjustable frequency drive
may cause the failure of the device and may lead to
serious injury or damage
●
The applicable national accident prevention and safety
regulations apply to all work carried out on live adjustable
frequency drives
●
The electrical installation must be carried out in
accordance with the relevant regulations (for example,
with regard to cable cross sections, fuses, PE)
●
Transport, installation, commissioning, and maintenance
work must be carried out only by qualified personnel
(IEC 60364, HD 384 and national occupational safety
regulations)
●
Installations containing adjustable frequency drives must
be provided with additional monitoring and protective
devices in accordance with the applicable safety
regulations. Modifications to the adjustable frequency
drives using the operating software are permitted
●
All covers and doors must be kept closed during operation
●
To reduce hazards for people or equipment, the user must
include in the machine design measures that restrict the
consequences of a malfunction or failure of the drive
(increased motor speed or sudden standstill of motor).
These measures include:
●
Other independent devices for monitoring safety-related
variables (speed, travel, end positions, and so on)
●
Electrical or non-electrical system-wide measures
(electrical or mechanical interlocks)
●
Never touch live parts or cable connections of the
adjustable frequency drive after it has been
disconnected from the power supply. Due to the charge
in the capacitors, these parts may still be live after
disconnection. Fit appropriate warning signs
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Safety
H-Max Series Adjustable Frequency Drive
Definitions and Symbols
WARNING
This symbol indicates high voltage. It calls your
attention to items or operations that could be dangerous
to you and other persons operating this equipment.
Read the message and follow the instructions carefully.
This symbol is the “Safety Alert Symbol.” It occurs with
either of two signal words: CAUTION or WARNING, as
described below.
WARNING
Indicates a potentially hazardous situation which, if not
avoided, can result in serious injury or death.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, can result in minor to moderate injury, or serious
damage to the product. The situation described in the
CAUTION may, if not avoided, lead to serious results.
Important safety measures are described in CAUTION (as
well as WARNING).
Hazardous High Voltage
WARNING
Motor control equipment and electronic controllers are
connected to hazardous line voltages. When servicing
drives and electronic controllers, there may be exposed
components with housings or protrusions at or above
line potential. Extreme care should be taken to protect
against shock.
Stand on an insulating pad and make it a habit to use only
one hand when checking components. Always work with
another person in case an emergency occurs. Disconnect
power before checking controllers or performing
maintenance. Be sure equipment is properly grounded. Wear
safety glasses whenever working on electronic controllers or
rotating machinery.
Warnings and Cautions
CAUTION
When selecting the cable cross-section, take the voltage
drop under load conditions into account.
The consideration of other standards (for example, VDE 0113
or VDE 0289) is the responsibility of the user.
CAUTION
The specified minimum PE conductor cross-sections
(EN 50178, VDE 0160) must be maintained.
WARNING
With frequency inverters, only AC/DC sensitive residual
current circuit breakers (RCD type B) are to be used
(EN 50178, IEC 755).
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Residual current circuit breakers (RCD) are only to be
installed between the AC power supply network and the
frequency inverter.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
If you are connecting multiple motors on one frequency
inverter, you must design the contactors for the individual
motors according to utilization category AC-3.
Selecting the motor contactor is done according to the rated
operational current of the motor to be connected.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
A changeover between the frequency inverter and the input
supply must take place in a voltage-free state.
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com vii
H-Max Series Adjustable Frequency Drive
WARNING
The frequency inverter outputs (U, V, W) must not be
connected to the input voltage (destruction of the
device, risk of fire).
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Switch S1 must switch only when frequency inverter T1 is at
zero current.
WARNING
Carry out wiring work only after the frequency inverter
has been correctly mounted and secured.
WARNING
Electric shock hazard—risk of injuries!
Carry out wiring work only if the unit is de-energized.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Fire hazard!
Only use cables, protective switches, and contactors that
feature the indicated permissible nominal current value.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Ground contact currents in frequency inverters are greater
than 3.5 mA (AC). According to product standard IEC/EN
61800-5-1, an additional equipment grounding conductor
must be connected, or the cross-section of the equipment
grounding conductor must be at least 0.39 in
2
(10 mm2).
WARNING
The components in the frequency inverter’s power
section remain energized up to five (5) minutes after the
supply voltage has been switched off (intermediate
circuit capacitor discharging time).
Pay attention to hazard warnings!
DANGER
5 MIN
WARNING
Do not perform any modifications on the AC drive when
it is connected to mains.
CAUTION
Before connecting the AC drive to mains make sure that the
EMC protection class settings of the drive are appropriately
made.
viii H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Engineering
Introduction
This chapter describes the most important features in the energy circuit of a drive system
(PDS = Power Drive System) that you should take into consideration in your project planning.
Drive System (PDS)
L1
L2
햲
L3
PE
햳
I > I > I >
RCD
햴
햵
L1 L2
L3 PE
Item
Number Description
1 Network configuration, input voltage, input frequency,
interaction with p.f. correction systems
2 Breakers, fuses, and cable cross-sections
3 Protection of persons and domestic animals with
residual-current protective devices
4 Input contactor
5 Frequency inverter: mounting, installation; power connection;
EMC measures; circuit examples
6 Motor reactor, dv/dt filter, sine-wave filter
7 Motor protection; thermistor
8 Cable lengths, motor cables, shielding (EMC)
9 Motor and application, parallel operation of multiple motors
on a frequency inverter, bypass circuit; DC braking
Engineering
PE U V W
M
~
3
햺
햶
#
햷
햸
PES
햹
PES
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com 1
Engineering
Electrical Power Network
Input Connection and Configuration
The H-Max series frequency inverters can be connected and
operated with all control-point grounded AC power networks
(see IEC 60364 for more information).
AC Power Networks with Grounded Center Point
(TN-/TT Networks)
L1
L2
L3
N
PE
While planning the project, consider a symmetrical
distribution to the three external conductors, if multiple
frequency inverters with single-phase supplies are to be
connected. The total current of all single-phase consumers is
not to cause an overload of the neutral conductor
(N-conductor).
The connection and operation of frequency inverters to
asymmetrically grounded TN networks (phase-grounded
Delta network “Grounded Delta”, USA) or non-grounded or
high-resistance grounded (over 30 ohms) IT networks is only
conditionally permissible.
If the H-Max frequency inverters are connected to an
asymmetrically grounded network or to an IT network
(non-grounded, insulated), the internal interference
suppression filter must be disconnected (unscrew the screw
marked EMC, see “Installation in IT System” on Page 33).
The required filtering for electromagnetic compatibility (EMC)
is then no longer present.
Measures for electromagnetic compatibility are mandatory in
a drive system in order to meet the legal requirements for
EMC and low voltage regulations.
Good grounding measures are a prerequisite for the effective
insert of further measures such as shielding or filters.
Without respective grounding measures, further steps are
superfluous.
L1
L2
L3
PEN
Input Voltage and Frequency
The standardized input voltages (IEC 60038, VDE017-1) for
energy suppliers (EVU) guarantee the following conditions at
the transition points:
●
Deviation from the rated value of voltage: maximum ±10%
●
Deviation in voltage phase balance: maximum ±3%
●
Deviation from rated value of the frequency:
maximum ±4%
The broad tolerance band of the H-Max frequency inverter
considers the rated value for
European as (EU: U
American as (USA: U
voltages:
●
230V, 50 Hz (EU) and 240V, 60 Hz (USA) at HMX32
●
400V, 50 Hz (EU) and 480V, 60 Hz (USA) at HMX34_
For the bottom voltage value, the permitted voltage drop of
4% in the consumer circuits is also taken into account,
therefore a total of U
●
200V device class (HMX32):
208V –10% to 240V +10% (188V –0% to 264V +0%)
●
400V device class (HMX34):
380V –10% to 480V +10% (342V –0% to 528V +0%)
The permitted frequency range is 50/60 Hz (48 Hz –0%
–66 Hz +0%).
= 230V/400V, 50 Hz) and
LN
= 240V/480V, 60 Hz) standard
LN
–14%.
LN
2 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Engineering
Voltage Balance
Because of the uneven loading on the conductor, and with
the direct connection of greater power ratings, deviations
from the ideal voltage form and asymmetrical voltages can
be caused in three-phase AC power networks. These
asymmetric divergences in the input voltage can lead to
different loading of the diodes in input rectifiers with
three-phase supplied frequency inverters, and as a result,
an advance failure of this diode.
In the project planning for the connection of three-phase
supplied frequency inverters (HMX32, HMX34), consider
only AC power networks that handle permitted asymmetric
divergences in the input voltage +3%.
If this condition is not fulfilled, or symmetry at the connection
location is not known, the use of an assigned main choke is
recommended.
Total Harmonic Distortion (THD)
The THD (Total Harmonic Distortion) is a measurement for
the occurring harmonic distortion of the sinusoidal oscillation
(input power side) input variables with the frequency
inverter. It is given in percent of the total value.
2
U
U+
=
K
2
-----------------------------------------------------------------------------------------------------------
2
U
2
U+
1
++
2
2
2
U
++
+
3
4
2
U
2
U
3
4
... U
... U
++
2
n
•
100%
2
n
Idle Power Compensation Devices
Compensation on the power supply side is not required for
H-Max series frequency inverters. From the AC power
supply network, they take on very little reactive power of the
fundamental harmonics (cos ~ 0.98).
In the AC power networks with non-choked idle current
compensation devices, current deviations can enable parallel
resonance and undefinable circumstances.
In the project planning for the connection of frequency
inverters to AC power networks with undefined
circumstances, consider using main chokes.
U
= fundamental component
1
THD k = 0.1 K = 10% ~ –20 dB (THD suppression)
THD
2
2
U
U+
2
----------------------------------------------------------------------------------------------------=
2
U
++
+
3
4
U
1
... U
2
n
With H-Max series frequency inverters, the permitted value
for the total harmonic distortion THD is >120%.
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com 3
Engineering
Safety and Switching
Fuses and Cable Cross-Sections
The fuses and wire cross-sections allocated for power-side
connections depend on the rated input current I
frequency inverter (without input reactor).
LN
of the
CAUTION
When selecting the cable cross-section, take the voltage
drop under load conditions into account.
The consideration of other standards (for example, VDE 0113
or VDE 0289) is the responsibility of the user.
The national and regional standards (for example VDE 0113,
EN 60204) must be observed and the necessary approvals
(for example UL) at the site of installation must be fulfilled.
When the device is operated in a UL-approved system, use
only UL-approved breakers, fuses, fuse bases, and cables.
The leakage currents to ground (to EN 50178) are greater
than 3.5 mA. The connection terminals marked PE and the
housing must be connected with the ground circuit.
CAUTION
The specified minimum PE conductor cross-sections
(EN 50178, VDE 0160) must be maintained.
Choose the cross-section of the PE conductor in the motor
lines at least as large as the cross-section of the phase lines
(U, V, W).
Cables and Fuses
The cross-sections of the cables and line protection fuses
used must correspond with local standards.
For an installation in accordance with UL guidelines, the
fuses and copper cable that are UL-approved and have a
heat-resistance of 167° to 194°F (75° to 90°C) are to be used.
Use power cables with insulation according to the specified
input voltages for the permanent installation. A shielded
cable is not required on the input side.
A completely (360°) shielded low impedance cable is
required on the motor side. The length of the motor cable
depends on the RFI class and must not exceed 500 ft (153m)
without additional filtering.
Residual-Current Device (RCD)
RCD (Residual Current Device): Residual current device,
residual current circuit breaker (FI circuit breaker).
Residual current circuit breakers protect persons and animals
from the existence (not the origination) of impermissibly high
contact voltages. They prevent dangerous, and in some
cases deadly injuries caused by electrical accidents, and also
serve as fire prevention.
WARNING
With frequency inverters, only AC/DC sensitive residual
current circuit breakers (RCD type B) are to be used
(EN 50178, IEC 755).
Identification on the Residual-Current Circuit-Breakers
AC/DC sensitive
(RCD, type B)
Frequency inverters work internally with rectified AC
currents. If an error occurs, the DC currents can block a type
A RCD circuit breaker from triggering and therefore disable
the protective functionality.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Residual current circuit breakers (RCD) are only to be
installed between the AC power supply network and the
frequency inverter.
Safety-relevant leakage currents can occur while handling
and when operating the frequency inverter, if the frequency
inverter is not grounded (because of a fault).
Leakage currents to ground are mainly caused by foreign
capacities with frequency inverters; between the motor
phases and the shielding of the motor cable and via the
Y-capacitors of the noise filter. The size of the leakage
current is mainly dependent upon the:
●
length of the motor cable
●
shielding of the motor cable
●
height of the pulse frequency (switching frequency of the
inverter)
●
design of the noise filter
●
grounding measures at the site of the motor
4 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Engineering
The leakage current to ground is greater than 3.5 mA with a
frequency inverter. Based on the requirements of EN 50178,
an increased ground (PE) has to be connected. The cable
cross-section must be at least 10 mm
2
or consist of two
separately connected ground cables.
Residual current circuit breakers must be suitable for:
●
the protection of installations with DC current component
in case of fault scenario (RCD type B)
●
high leakage currents (300 mA)
●
brief discharges of pulse current spikes
Input Contactor
The input contactor enables an operational switching on and
off of the supply voltage for the frequency inverter, and
switching off in case of a fault.
The input contactor is designed based on the input current
(I
) of the frequency inverter and the utilization category
LN
AC-1 (IEC 60947). Input contactors and the assignment to
H-Max frequency inverters are explained in the appendix.
While planning the project, make sure that inching operation
is not done via the input contactor of the frequency inverter
on frequency-controlled drives, but through a controller input
of the frequency inverter.
The maximum permitted operating frequency of the input
voltage with the H-Max frequency inverter is one time per
minute (normal operation).
EMC Measures
Electrical components in a system (machine) have a
reciprocal effect on each other. Each device not only emits
interference but is also affected by it. The interference can
be produced by galvanic, capacitive, and/or inductive
sources, or by electromagnetic radiation. In practice, the limit
between line-conducted interference and emitted
interference is around 30 MHz. Above 30 MHz, cables and
conductors act like antennas that radiate electromagnetic
waves.
Electromagnetic compatibility (EMC) for frequency controlled
drives (variable speed drives) is implemented in accordance
with product standard IEC/EN 61800-3. This includes the
complete power drive system (PDS), from the input supply to
the motor, including all components, as well as cables (see
figure on Page 1 ). This type of drive system can consist of
several individual drives.
The generic standards of the individual components in a PDS
compliant with IEC/EN 61800-3 do not apply. These
component manufacturers, however, must offer solutions
that ensure standards-compliant use.
In Europe, maintaining the EMC guidelines is mandatory.
A declaration of conformity (CE) always refers to a “typical”
power drive system (PDS). The responsibility to comply with
the legally stipulated limit values and thus the provision of
electromagnetic compatibility is ultimately the responsibility
of the end user or system operator. This operator must also
take measures to minimize or remove emission in the
environment concerned (see figure below). He must also use
means to increase the interference immunity of the devices
of the system.
With their high interference immunity up to category C2,
H-Max frequency inverters are ideal for use in commercial
networks (1st environment).
EMC Environment and Category
Public Medium-Voltage Supply Grid
Public
Measuring
Point
Category C1
Low-Voltage
Supply Grid
Category C1/C2 Category C3/C4 Category C3/C4
st
Enviroment 2nd Enviroment
1
Industry
Grid 1
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Industry
Grid 2
5
Engineering
Motor and Application
Motor Selection
General recommendations for motor selection:
●
Use three-phase powered asynchronous motors with
short-circuit rotors and surface cooling, also called
asynchronous motors or standard motors for the
frequency-controlled drive system (PDS). Other
specifications such as external rotor motors, slip-ring
motors, reluctance motors, synchronous or servo
motors can also be run with a frequency inverter, but
normally require additional planning and discussion
with the motor manufacturer
●
Use only motors with at least heat class F
(311°F [155°C] maximum steady state temperature)
●
Four-pole motors are preferred (synchronous speed:
1500 min
●
Take the operating conditions into account for S1 operation
–1
at 50 Hz or 1800 min
–1
at 60 Hz)
(IEC 60034-1)
●
When operating multiple motors in parallel on one
frequency inverter, the motor output should not be more
than three power classes apart
●
Ensure that the motor is not overdimensioned. If a motor
in speed control mode is underdimensioned, the motor
rating must only be one rating level lower
Connecting Motors in Parallel
The H-Max frequency inverters allow parallel operation of
several motors using multi-pump application control mode:
●
Multi-pump application: several motors with the same or
different rated operational data. The sum of all motor
currents must be less than the frequency inverter’s rated
operational current
●
Multi-pump application: parallel control of several motors.
The sum of the motor currents plus the motors’ inrush
currents must be less than the frequency inverter’s rated
operational current
Parallel operation at different motor speeds can be
implemented only by changing the number of pole pairs and/
or changing the motor’s transmission ratio.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
If you are connecting multiple motors on one frequency
inverter, you must design the contactors for the individual
motors according to utilization category AC-3.
Selecting the motor contactor is done according to the rated
operational current of the motor to be connected.
Parallel Connection of Several Motors to
One Frequency Inverter
Q12Q11
F1
U1 V1 W1 U1 V1 W1 U1 V1 W1
M
M1
3
˜
F2
M
M2
3
˜
Q13
F3
M3
M
3
˜
Connecting motors in parallel reduces the load resistance at
the frequency inverter output. The total stator inductance is
lower and the leakage capacity of the lines greater. As a
result, the current distortion is greater than in a single-motor
circuit. To reduce the current distortion, you should use
motor reactors (see [1] in figure above) in the output of the
frequency inverter.
The current consumption of all motors connected in parallel
must not exceed the frequency inverter’s rated output
current I2N.
Electronic motor protection cannot be used when operating
the frequency inverter with several parallel connected
motors. You must, however, protect each motor with
thermistors and/or overload relays.
The use of a motor protective circuit breaker at the frequency
inverter’s output can lead to nuisance tripping.
6 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Motor and Circuit Type
The motor’s stator winding can be connected in a star or
delta configuration, in accordance with the rated operational
data on the nameplate.
Example of a Motor Ratings Plate
3.5/2
cos
A
0.79
/400 V230
0.75S1
kW
RPM
1430 50 Hz
Engineering
Because of the higher thermal loading, using only the next
higher motor output according to the list (1.1 kW) is
recommended. The motor (in this example) therefore still has
1.47-fold higher output compared with the listed output
(0.75 kW).
With the 87-Hz characteristic curve, the motor also works in
the range from 50 to 87 Hz with an unattenuated field. The
pull-out torque remains at the same level as in input
operation with 50 Hz.
The heat class of the motor must be at least F in 87-Hz
operation.
Star and Delta Circuit Types
U1 V1 W1
W2 U2 V2
U1 V1 W1
W2 U2 V2
V/Hz-Characteristic Curve
U2 (V)
400
230
The three-phase motor with the rating plate based on the
f
max
f (Hz)
figure shown above, can be run in a star or delta connection.
The operational characteristic curve is determined by the
ratio of motor voltage and motor frequency, in this case.
87-Hz Characteristic Curve
In the delta circuit with 400V and 87 Hz, the motor shown in
0
8750
The following table shows the allocation of possible
frequency inverters depending on the input voltage and the
type of circuit.
the figure above was released with three times-fold output
(~1.3 kW).
Assignment of Frequency Inverters to Example Motor Circuit (See Figure Above)
Frequency Inverters HMX32AG3D7 HMX34AG3D4 HMX34AG4D8
Rated operational current 3.7A 3.4A 4.8A
Input voltage 3 AC 230V 3 AC 400V 3 AC 400V
Motor circuit Delta Star Delta
V/Hz-characteristic curve
Motor current 3.5A 2.0A 3.5A
Motor voltage (ratings plate) 230V 400V 230V
Motor speed 1430 min
–1
Motor frequency 50 Hz 50 Hz 87 Hz
Notes
Star connection: 400V, 50 Hz.
Delta connection: 230V, 50 Hz.
Delta connection: 400V, 87 Hz.
Note the permitted limit values of the motor.
1430 min
–1
2474 min
–1
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
7
Engineering
Bypass Operation
If you want to have the option of operating the motor with
the frequency inverter or directly from the input supply, the
input branches must be interlocked mechanically.
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
A changeover between the frequency inverter and the input
supply must take place in a voltage-free state.
WARNING
The frequency inverter outputs (U, V, W) must not be
connected to the input voltage (destruction of the
device, risk of fire).
Bypass Motor Control (Example)
L2
L3
L1
Q1
>
I>I>I
Q11
L1 L2 L3
CAUTION
Debounced inputs may not be used in the safety circuit
diagram.
Switch S1 must switch only when frequency inverter T1 is at
zero current.
Contactors and switches (S1) in the frequency inverter
output and for the direct start must be designed based on
utilization category AC-3 for the rated operational current of
the motor.
Connecting EX Motors
Note the following when connecting explosion-protected
motors:
●
The frequency inverter must be installed outside the EX
area
●
Note the branch- and country-specific standards for
explosion-protected areas (ATEX 100a)
●
Note the standards and information of the motor
manufacturer regarding operation on frequency inverters—
for example, if motor reactors (du/dt-limiting) or sinus
filters are specified
●
Temperature monitors in the motor windings (thermistor,
thermo-Click) are not to be connected directly to frequency
inverters but must be connected via an approved trigger
apparatus for EX areas
2
UVW
T1
S1
M
M1
3~
Item
Number Description
1
Input/bypass contactor
Output contactor
8 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
System Overview
Component Identification
H-Max Series Description of the H-Max
1
4
5
2
BYP
ASS
Ba
c
k
HOA
OK
2
s
e
c.
STOP
RES
ET
S
TA
RT
12
BY
PA
SS
HOA
Back
OK
2
se
c.
ST
OP
RE
S
ET
ST
ART
System Overview
3
Item
Number Description
1
Frequency inverter HMX-_
I/O option boards
Motor reactor DEX-LM3, sinusoidal filter SFB400
Keypad
3
4
Item
Number Description
1
Mounting holes
Device fan
Front cover
4 Power terminals
5 Keypad with display
Features
The H-Max frequency inverter converts the voltage and
frequency of an existing AC network into a DC voltage. This
DC voltage is used to generate a three-phase AC voltage
with adjustable frequency and assigned amplitude values for
the variable speed control of three-phase asynchronous
motors.
2
3
4
2
3
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
9
System Overview
Block Diagram, Elements of H-Max Frequency Inverters
R+
R–
L1
L2
L3
PE
+
EMC
U/T1
V/T2
W/T3
PE
M
3 ~
Item
Number Description
1 Supply L1, L2/N, L3, PE, input supply voltage U
HMX32: 200V class, three-phase input connection (3 AC 230V/240V)
= Ue at 50/60 Hz:
LN
HMX34: 400V class, three-phase input connection (3 AC 400V/480V)
2 Internal interference suppression filter, category C2 to IEC/EN 61800-3
EMC-connection of internal interference suppression filter to PE
3 Rectifier bridge, converts the AC voltage of the electrical network into DC voltage
4 DC link with charging resistor, capacitor and switching mode power supply unit
(SMPS = Switching Mode Power Supply):
DC link voltage U
with three-phase input connection (3 AC): UDC = 1.41 x U
DC
LN
5 Inverter. The IGBT based inverter converts the DC voltage of the DC link (UDC) into a three-phase AC voltage (U2) with variable amplitude and
frequency (f
6 Motor connection U/T1, V/T2, W/T3 with output voltage U
HMX32: 3.7–310A
). Sinusoidal pulse width modulation (PWM) with V/f control can be switched to speed control with slip compensation
2
(0–100% Ue) and output frequency f2 (0–320 Hz) output current (I2):
2
HMX34: 3.4–310A
100% at an ambient temperature of 104°F (40°C) with an overload capacity of 110% for 60s every 600s and a starting current of 200% for 2s every 20s
7 Keypad with control buttons, graphic display, control voltage, control signal terminals, microswitches, and interface for the PC interface module
(option)
8 Three-phase asynchronous motor, variable speed control of three-phase asynchronous motor for assigned motor shaft power values (P
HMX32: 0.55–90 kW (230V, 50 Hz) or 0.75–125 hp (230V, 60 Hz)
):
2
HMX34: 1.1–160 kW (400V, 50 Hz) or 1.5–250 hp (460V, 60 Hz)
9 DC link—chokes, to minimize current harmonics
10 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
Selection Criteria
The frequency inverter [3] is selected according to the supply
voltage U
the assigned motor [2]. The circuit type ( / ) of the motor
must be selected according to the supply voltage [1]. The
rated output current I
greater than/equal to the rated motor current.
Selection Criteria
3
of the input supply [1] and the rated current of
LN
of the frequency inverter must be
e
U, I, f
BACK
RE
SET
LOC
REM
OK
I
1
2
System Overview
When connecting multiple motors in parallel to the output of
a frequency inverter, the motor currents are added
geometrically—separated by effective and idle current
components. When you select a frequency inverter, make
sure that it can supply the total resulting current. If
necessary, for dampening and compensating the deviating
current values, motor reactors or sinusoidal filters must be
connected between the frequency inverter and the motor.
The parallel connection of multiple motors in the output of
the frequency inverter is only permitted with V/Hzcharacteristic curve control.
If you connect a motor to an operational frequency inverter,
the motor draws a multiple of its rated operational current.
When you select a frequency inverter, make sure that the
starting current plus the sum of the currents of the running
motors will not exceed the rated output current of the
frequency inverter.
Switching in the output of the frequency inverter is only
permitted with V/Hz-characteristic curve control.
400/690V /
7.5
1410 50 Hz
kW
min
15.2/8.8A
cos
0.82
–1
When selecting the drive, the following criteria must be
known:
●
Type of motor (three-phase asynchronous motor)
●
Input voltage = rated operating voltage of the motor
(for example, 3 AC~400V)
●
Rated motor current (guide value, dependent on the circuit
type and the supply voltage)
●
Load torque (quadratic, constant)
●
Starting torque
●
Ambient temperature (rated value 122°F [50°C])
H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com 11
System Overview
Proper Use
The H-Max frequency inverters are not domestic appliances.
They are designed only for use as HVAC or pumping system
components.
The H-Max frequency inverters are electrical apparatus for
controlling variable speed drives with three-phase motors.
They are designed for installation in machines or for use in
combination with other components within a machine or
system.
After installation in a machine, the frequency inverters must
not be taken into operation until the associated machine has
been confirmed to comply with the safety requirements of
Machinery Safety Directive (MSD) 89/392/EEC (meets the
requirements of EN 60204). The user of the equipment is
responsible for ensuring that the machine use complies with
the relevant EU Directives.
The CE markings on the H-Max frequency inverter confirm
that, when used in a typical drive configuration, the apparatus
complies with the European Low Voltage Directive (LVD) and
the EMC Directives (Directive 73/23/EEC, as amended by
93/68/EEC and Directive 89/336/EEC, as amended by
93/68/EEC).
In the described system configurations, H-Max frequency
inverters are suitable for use in public and non-public
networks.
A connection to IT networks (networks without reference to
earth potential) is permissible only to a limited extent,
because the device’s built-in filter capacitors connect the
network with the earth potential (enclosure). On earth free
networks, this can lead to dangerous situations or damage to
the device (isolation monitoring required).
To the output of the frequency inverter (terminals U, V, W)
you must not:
●
connect a voltage or capacitive loads (for example, phase
compensation capacitors)
●
connect multiple frequency inverters in parallel
●
make a direct connection to the input (bypass)
Maintenance and Inspection
H-Max frequency inverters are maintenance free. However,
external influences may affect the function and the lifespan
of the H-Max frequency inverter. We therefore recommend
that the devices are checked regularly and the following
maintenance measures are carried out at the specified
intervals.
There are no plans for replacing or repairing individual
components of H-Max frequency inverters.
If the H-Max frequency inverter is damaged by external
influences, repair is not possible. Dispose of the device in
accordance with the respectively applicable environmental
laws and provisions for the disposal of electrical or electronic
devices.
Maintenance Measures and Intervals
Maintenance Measure Maintenance Interval
Clean cooling vents (cooling slits) If required
Check the fan function 6–24 months (depending on the
Filter in the switching cabinet doors
(see manufacturer specifications)
Check the tightening torques of the
terminals (control signal terminals,
power terminals)
Check connection terminals and all
metallic surfaces for corrosion
environment)
6–24 months (depending on the
environment)
Regularly
6–24 months (depending on the
environment)
Observe the technical data and connection requirements. For
additional information, refer to the equipment nameplate or
label at the frequency inverter, and the documentation.
Any other usage constitutes improper use.
12 H-Max Series Adjustable Frequency Drive MN04008005E—September 2011 www.eaton.com
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