bonitron M3545P User manual
Model M3545P
Regenerative
DC Bus Power Supply
Customer Reference Manual
Bonitron, Inc.
2
Bonitron, Inc.
Nashville, TN
An industry leader in providing solutions for AC drives.
ABOUT BONITRON
Bonitron designs and manufactures quality industrial electronics that improve the reliability of
processes and variable frequency drives worldwide. With products in numerous industries, and
an educated and experienced team of engineers, Bonitron has seen thousands of products
engineered since 1962 and welcomes custom applications.
With engineering, production, and testing all in the same facility, Bonitron is able to ensure its
products are of the utmost quality and ready to be applied to your application.
The Bonitron engineering team has the background and expertise necessary to design, develop,
and manufacture the quality industrial electronic systems demanded in today’s market. A strong
academic background supported by continuing education is complemented by many years of
hands-on field experience. A clear advantage Bonitron has over many competitors is combined
on-site engineering labs and manufacturing facilities, which allows the engineering team to have
immediate access to testing and manufacturing. This not only saves time during prototype
development, but also is essential to providing only the highest quality products.
The sales and marketing teams work closely with engineering to provide up-to-date information
and provide remarkable customer support to make sure you receive the best solution for your
application. Thanks to this combination of quality products and superior customer support,
Bonitron has products installed in critical applications worldwide.
Bonitron, Inc.
3
AC DRIVE OPTIONS
In 1975, Bonitron began working with AC inverter drive specialists at synthetic fiber plants to
develop speed control systems that could be interfaced with their plant process computers. Ever
since, Bonitron has developed AC drive options that solve application issues associated with
modern AC variable frequency drives and aid in reducing drive faults. Below is a sampling of
Bonitron’s current product offering.
WORLD CLASS PRODUCTS
Undervoltage Solutions
Overvoltage Solutions
Uninterruptible Power for Drives
(DC Bus Ride-Thru)
Voltage Regulators
Chargers and Dischargers
Energy Storage
Braking Transistors
Braking Resistors
Transistor/Resistor Combo
Line Regeneration
Dynamic Braking for Servo Drives
Common Bus Solutions
Portable Maintenance Solutions
Single Phase Power Supplies
3-Phase Power Supplies
Common Bus Diodes
Capacitor Formers
Capacitor Testers
Power Quality Solutions
Green Solutions
12 and 18 Pulse Kits
Line Regeneration
M3545P
4
1. INTRODUCTION..........................................................................................................................7
1.1. Who should use ............................................................................................................................7
1.2. Purpose and Scope........................................................................................................................ 7
1.3. Manual version and change record...............................................................................................7
Figure 1-1: Typical M3545P Regenerative Power Supply.......................................................................7
1.4. Symbol Conventions Used in this Manual and on Equipment.....................................................8
2. PRODUCT DESCRIPTION............................................................................................................9
2.1. Related Products...........................................................................................................................9
2.2. Part Number Breakdown ..............................................................................................................9
Figure 2-1: Example of M3545P Part Number Breakdown.....................................................................9
Table 2-1: Voltage Ratings ....................................................................................................................10
Table 2-2: Chassis Styles .......................................................................................................................10
Table 2-3: Option Codes ........................................................................................................................10
2.3. General Specifications Chart......................................................................................................11
Table 2-4: General Specifications..........................................................................................................11
2.4. General Precautions and Safety Warnings .................................................................................12
3. INSTALLATION INSTRUCTIONS................................................................................................13
3.1. Environment ...............................................................................................................................13
3.2. Unpacking................................................................................................................................... 13
3.3. Mounting ....................................................................................................................................13
Figure 3-1: M3545P Mounting Orientation ...........................................................................................14
3.4. Wiring and Customer Connections.............................................................................................15
3.4.1. Power Wiring......................................................................................................................15
Table 3-1: Power Terminal Specifications.............................................................................................16
Figure 3-2: M3545P Power & I/O Connection Location .......................................................................16
3.4.2. I/O Wiring...........................................................................................................................17
Table 3-2: M3545P I/O Wiring..............................................................................................................17
Figure 3-3: M3545P I/O Diagram..........................................................................................................17
3.5. Typical Configurations...............................................................................................................17
Figure 3-4: M3545P Power Wiring........................................................................................................18
Figure 3-5: M3545P Multiple Drives Field Wiring Diagram.................................................................19
4. OPERATION..............................................................................................................................21
4.1. Functional Description ...............................................................................................................21
4.2. Features....................................................................................................................................... 21
4.2.1. Indicator LEDs....................................................................................................................21
4.3. Faults ..........................................................................................................................................21
4.3.1. Operational Faults...............................................................................................................21
Table 4-1: Blink Codes ..........................................................................................................................22
4.3.2. System Faults......................................................................................................................22
Table 4-2: System Faults........................................................................................................................22
4.4. User I/O Connections .................................................................................................................22
4.4.1. N/C (TB-6)..........................................................................................................................22
4.4.2. Input COM (TB-7)..............................................................................................................22
4.4.3. Fault Recall (TB-8).............................................................................................................22
4.4.4. Output Com (TB-9).............................................................................................................23
4.4.5. Ready (TB-10) .................................................................................................................... 23
4.5. Startup......................................................................................................................................... 23
4.5.1. Pre-power Checks............................................................................................................... 23
Table of Contents
5
4.5.2. Startup Procedure and Checks ............................................................................................23
4.5.3. Cooling Fan.........................................................................................................................23
5. MAINTENANCE AND TROUBLESHOOTING...............................................................................25
5.1. Periodic Testing..........................................................................................................................25
5.2. Maintenance Items......................................................................................................................25
5.3. Troubleshooting.......................................................................................................................... 25
5.3.1. POWER LED is not on.......................................................................................................25
5.3.2. READY output will not close.............................................................................................25
5.3.3. Over Voltage fault on Drive or Regen................................................................................25
5.3.4. Overtemperature Fault ........................................................................................................26
5.3.5. IGBT Desat Fault................................................................................................................26
5.3.6. Phase Loss Fault..................................................................................................................26
5.3.7. Fuses fail on power on........................................................................................................26
5.4. Technical Help –Before you contact us..................................................................................... 26
6. ENGINEERING DATA................................................................................................................27
6.1. Ratings Charts.............................................................................................................................27
Table 6-1: Ratings and Specifications –230 - 240VAC ........................................................................27
Table 6-2: Ratings and Specifications –460 - 480VAC ........................................................................27
6.2. Derating Parallel M3545P ..........................................................................................................27
Table 6-3: Derating M3545P in Parallel ................................................................................................27
6.3. Watt Loss....................................................................................................................................27
6.4. Certifications ..............................................................................................................................28
6.4.1. UL 61800-5-1......................................................................................................................28
6.4.2. RoHS...................................................................................................................................28
6.5. Fuse Selection............................................................................................................................. 28
Table 6-4: Fuse Current Rating Requirements.......................................................................................28
6.6. Dimensions and Mechanical Drawings ......................................................................................29
Figure 6-1: M3545P M4 Chassis Dimensional Outline .........................................................................29
7. APPENDIX.................................................................................................................................31
7.1. Application Notes.......................................................................................................................31
7.1.1. Sizing the M3545P..............................................................................................................31
7.1.2. Calculating Energy Savings................................................................................................32
M3545P
6
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User’s Manual
7
1. INTRODUCTION
1.1. WHO SHOULD USE
This manual is intended for use by anyone who is responsible for integrating, installing,
maintaining, troubleshooting, or using this equipment with any AC Drive System.
Please keep this manual for future reference.
1.2. PURPOSE AND SCOPE
This manual is a user’s guide for the Model M3545P regenerative power supply. It
provides you with the necessary information to successfully install and use the
M3545P unit in your application.
In the event of any conflict between this document and any publication and/or
documentation related to the application, the latter shall have precedence.
1.3. MANUAL VERSION AND CHANGE RECORD
The initial release of the M3545P Line Regen is Rev 00a.
Fuse current ratings and recommended fuses Table 6-4 was updated in Rev 0b.
Updated table 7.1.1 in Rev 00c
Figure 1-1: Typical M3545P Regenerative Power Supply
M3545P
8
1.4. SYMBOL CONVENTIONS USED IN THIS MANUAL AND ON
EQUIPMENT
Earth Ground or Protective Earth
AC Voltage
DC Voltage
DANGER!
DANGER: Electrical hazard - Identifies a statement that indicates
a shock or electrocution hazard that must be avoided.
DANGER!
DANGER: Identifies information about practices or circumstances
that can lead to personal injury or death, property damage, or
economic loss.
CAUTION!
CAUTION: Identifies information about practices or
circumstances that can lead to property damage, or economic
loss. Attentions help you identify a potential hazard, avoid a
hazard, and recognize the consequences.
CAUTION!
CAUTION: Heat or burn hazard - Identifies a statement regarding
heat production or a burn hazard that should be avoided.
User’s Manual
9
OPTION CODE
R
2. PRODUCT DESCRIPTION
The M3545P Regenerative DC Power Supply is a bi-directional power supply. During
normal operation it sources energy to the drive through the DC bus. If the DC bus voltage
begins to rise, due to the drive trying to brake or an overhauling load, the M3545P will sink
energy back to the AC Line. Under motoring conditions, the M3545P rectifies the AC line
and supplies power to the drive through its DC bus terminals.
Alternative resistive braking solutions simply dissipate this regenerated energy as heat.
Bonitron’s M3545P returns the regenerated energy back to the AC line, making it
particularly well suited for applications with frequent or extended duration braking events.
Additionally, the M3545P is designed to be able to operate on both single-phase and
three-phase AC grids, at either 50Hz or 60Hz line frequency.
2.1. RELATED PRODUCTS
COMMON BUS DIODES
•M3345CBM Sharing Diode
BRAKING RESISTORS
•M3575R Standard Duty Braking Resistors (<30A)
•M3775R Various Duty Load Banks (<1600A)
BRAKING TRANSISTORS
•M3452 Heavy Duty Braking Transistor (<1600A)
•M3575T Standard Duty Braking Transistor (<600A)
•M3675T Low HP Braking Transistor (<10A)
THREE PHASE POWER SUPPLIES
•M3713DM Non-Regenerative Power Supply (<375A)
•M3713SC Non-Regenerative Power Supply with Precharge (<375A)
LINE REGEN
•M3545 Single Phase or Three Phase Line Regen (<15A)
•M3645 Heavy Duty Line Regen (<375A)
RESISTIVE PRECHARGE
•M3728 Precharge Module
2.2. PART NUMBER BREAKDOWN
Figure 2-1: Example of M3545P Part Number Breakdown
M3545P
H
015
M4
BASE MODEL NUMBER
VOLTAGE RATING
CURRENT RATING
CHASSIS STYLE
M3545P
10
BASE MODEL NUMBER
The Base Model Number for these regenerative power supply is M3545P.
VOLTAGE RATING
A code letter represents the AC line voltage of the power supply module. The voltage
rating must be selected for the system voltage that will be applied. See Table 2-1 for
available voltage ratings.
Table 2-1: Voltage Ratings
RATING CODE
VOLTAGE
L
230 - 240VAC
H
460 - 480VAC
CURRENT RATING
A 3-digit number represents the maximum continuous DC current (Amps) the unit can
regenerate. Each unit is capable of handling a 50% overload above this current rating
for 60 seconds.
CHASSIS STYLE
The Chassis Style is determined by the current rating, and is represented by an
alphanumeric code as defined in Table 2-2.
Table 2-2: Chassis Styles
CHASSIS CODE
CURRENT
DESCRIPTION
SIZE (H X WX D)
M4
15A
Open Chassis
17.0” x 4.7” x 10.8”
See Section 6.5 for chassis mounting and dimensional outlines.
OPTION CODE
The available option codes are listed in Table 2-3.
Table 2-3: Option Codes
OPTION CODE
DESCRIPTION
R
Precharge (required for VFDs without
precharge on DC terminals)
User’s Manual
11
2.3. GENERAL SPECIFICATIONS CHART
Table 2-4: General Specifications
PARAMETER
SPECIFICATION
AC Line Voltage
•230 - 480 VAC ±10% 50/60Hz
DC Input Current
3-Phase Operation
•15A, continuous
•22.5A for 60 second overload
1-Phase Operation
•5A, continuous
•7.5A for 60 second overload
Maximum Load
Capacitance
•10,000 uF (-R option only)
Indicators
•3 Status LEDs
•Power, Regen, Not Ready
Inputs
•Fault Blink
o24VDC - 5mA
Outputs
•Ready
oNormally Open, Solid State Relay
Operating Temp
•0 to +40OC
Storage Temp
•-20Oto +65OC
Humidity
•Below 90%, non-condensing
Atmosphere
•Free of corrosive gas or conductive dust
M3545P
12
2.4. GENERAL PRECAUTIONS AND SAFETY WARNINGS
DANGER!
•HIGH VOLTAGES MAY BE PRESENT!
•NEVER ATTEMPT TO OPERATE THIS PRODUCT WITH THE ACCESS
DOORS OR COVERS OPENED!
•NEVER ATTEMPT TO SERVICE THIS PRODUCT WITHOUT FIRST
DISCONNECTING POWER TO AND FROM THE UNIT!
•FAILURE TO HEED THESE WARNINGS MAY RESULT IN
SERIOUS BODILY INJURY OR DEATH!
CAUTION!
•THIS PRODUCT WILL GENERATE HIGH AMBIENT TEMPERATURES
DURING OPERATION.
•THIS PRODUCT SHOULD BE INSTALLED ON A NON-FLAMMABLE
SURFACE WITH CLEARANCES OF AT LEAST TWO INCHES IN ALL
DIRECTIONS.
•ALWAYS ALLOW AMPLE TIME FOR THE UNIT TO COOL BEFORE
ATTEMPTING SERVICE ON THIS PRODUCT.
•BEFORE ATTEMPTING INSTALLATION OR REMOVAL OF THIS
PRODUCT,BE SURE TO REVIEW ALL DRIVE AND/OR RESISTIVE
LOAD DOCUMENTATION FOR PERTINENT SAFETY PRECAUTIONS.
•INSTALLATION AND/OR REMOVAL OF THIS PRODUCT SHOULD
ONLY BE ACCOMPLISHED BY A QUALIFIED ELECTRICIAN IN
ACCORDANCE WITH NATIONAL ELECTRICAL CODE OR
EQUIVALENT REGULATIONS.
ANY QUESTIONS AS TO APPLICATION, INSTALLATION OR SERVICE
SAFETY SHOULD BE DIRECTED TO THE EQUIPMENT SUPPLIER.
User’s Manual
13
3. INSTALLATION INSTRUCTIONS
CAUTION!
Installation and/or removal of this product should only be performed by a
qualified electrician in accordance with National Electrical Code or local
codes and regulations.
Proper installation of the M3545P regenerative power supply modules should be
accomplishedfollowing the steps outlined below. Be sure to refer tothe AC drive instruction
manual as these steps are performed. Please direct all installation inquiries that may arise
during the installation and start-up of this product to the equipment supplier or system
integrator.
3.1. ENVIRONMENT
The module should be installed in an area protected from moisture and falling debris.
Buildup of dust or debris may cause poor performance and possibly a failure.
Operating in a wet environment can pose a shock hazard. The recommended
temperature range for operating this module is 0 to +40C.
3.2. UNPACKING
Upon receipt of this product, please verify that the product received matches the
product that was ordered and that there is no obvious physical damage to the unit. If
the wrong product was received or the product is damaged in any way, please contact
the supplier from which the product was purchased.
3.3. MOUNTING
The installation site for the module should be chosen with several considerations in
mind:
•When mounting the units in an enclosure, power dissipation should be taken into
account. Refer to Section 6.2 Watt Loss for details.
•The unit requires a minimum clearance of two (2) inches in all directions around it
when not mounted near a heat source. Heat sources may increase necessary
clearances.
•Unit should not be exposed to falling debris or condensation.
Once the installation site has been selected as outlined above, the unit should be
mounted in place.
The M3545P must be correctly oriented for proper heat flow through the unit. The
M3545P must be mounted with the rear surface of the unit to the mounting surface.
The unit may be mounted vertically or horizontally as shown in Figure 3-1A and 3-1D.
Do Not mount the unit in an upside-down position or on the underside of a mounting
surface as shown in Figure 3-1B and 3-1E.
Do Not mount the unit in a horizontal position with its side parallel to the mounting
surface or floor as shown in Figure 3-1C.
See Figure 6-1 for dimensional outline.
M3545P
14
Figure 3-1: M3545P Mounting Orientation
Figure 3-1A
Figure 3-1D
HORIZONTAL SURFACE
UP
UP
UP
PARALLEL TO FLOOR
Fig C
UP
Fig D Fig E
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUT COM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
B NITRON
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUT COM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUT COM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUT COM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
Figure 3-1B
Figure 3-1E
UP
HANGING UNDERSIDE
UP
Fig D
UP
Fig E
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
B NITRON
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
Figure 3-1C
UP
PARALLEL TO FLOOR
Fig C
UP
Fig D Fig E
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
B NITRON
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
M3545
Line Regen
POWER
REGEN
NOT READY
140040
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUTCOM
READY
GROUND
N/C
RISKOF ELECTRICAL SHOCK.
DISCONNECTINPUT POWER
BEFORESERVICING EQUIPMENT.
User’s Manual
15
3.4. WIRING AND CUSTOMER CONNECTIONS
All power and user I/O wiring connections are brought out to the terminal block in the
front face of the unit; there should be no need to open the chassis during installation.
Be sure to review all pertinent AC drive and system documentation as well as the
information listed below before proceeding. Connection points and terminal numbers
of the AC drive will be found in the documentation provided with those units.
See Tables 3-1 and 3-2 and Figures 3-2 through 3-5 for connection details.
3.4.1. POWER WIRING
Power connections are on the terminal block on TB-1 through TB-5. See
Figure 3-2.
▪Where possible, minimize the DC wire length between the M3645P and
the drive. The wire length should not exceed 10 feet.
▪Avoid routing and bundling the unit’s AC/DC wire along with the drive
output leads to the motor.
CAUTION!
Only qualified electricians should perform and maintain the interconnection
wiring of this product. All wiring should be in accordance with local codes.
3.4.1.1. AC LINE
•The AC Line connections should be to a source rated for at least 150%
of the continuous current rating. This will ensure sufficient source
impedance to return power to the grid.
•Do not install any external chokes or reactors between the M3545P and
the power source; the M3545P has an internal 5% reactor.
•A properly rated isolation transformer may be installed between the
M3545P and the power source, if desired.
•Do not connect to a generator unless minimum load at any time exceeds
the peak expected regen power.
•The M3545P units are not phase sensitive.
•The AC Line connections should have short-circuit current protection.
See Table 6-3.
•To use the M3545P on a single-phase AC grid, you MUST connect to AC
L1 (TB-1) and AC L2 (TB-2).
3.4.1.2. DC BUS
•The DC bus connections may be made to the DC bus of an AC drive, the
DC output of a diode sharing unit, or to a common DC bus.
oIf a reactor or choke are being used in the bus, make sure the actual
connection is in parallel with filter capacitors of the drive/inverter.
•The DC bus connections should have short-circuit current protection.
The recommended fuses are listed in Table 6-3.
M3545P
16
DANGER!
Never attach the DC bus input of the M3545P to braking terminals on the AC
drive, commonly marked “BR”. These terminals are intended for use with an
external resistor, and are not directly connected to the bus filter capacitors of
the drive. Damage may occur if these terminals are used.
Please refer to your AC drive manual or AC drive technical support department
for assistance with this connection.
3.4.1.3. GROUNDING
Using the GND TB-11 on the terminal block, ground the chassis in
accordance with local codes. Typically, the wire gauge will be the same
as is used to ground the attached drive.
Table 3-1: Power Terminal Specifications
TERMINALS
FUNCTION
ELECTRICAL
RATINGS
WIRE SIZE
TORQUE
L1, L2, L3
AC line
15A
12 AWG
7 lb-in
DC+, DC-
DC bus
15A
12 AWG
7 lb-in
Ground
12 AWG
7 lb-in
Note: All power wire should be selected to match or exceed the voltage rating of the M3545P.
Ground wiring should be, at smallest, one gauge smaller than the selected power wiring.
Figure 3-2: M3545P Power & I/O Connection Location
AC L1
AC L2
AC L3
DRIVE BUS (+)
DRIVE BUS (-)
INPUT COM
FAULT RECALL
OUTPUT COM
READY
N/C
GROUND
User’s Manual
17
3.4.2. I/O WIRING
User I/O is connected on the terminal block to TB-6 through TB-10.
Table 3-2: M3545P I/O Wiring
TERMINALS
FUNCTION
ELECTRICAL
RATINGS
WIRE SIZE
MINIMUM
WIRE SIZE
MAXIMUM
TORQUE
TB-6
N/C
TB-7
Input COM
COM to TB-8
18
16
2.2 lb-in
TB-8
Fault Recall
24VDC, 5mA
18
16
2.2 lb-in
TB-9
Output COM
COM to TB-10
18
16
2.2 lb-in
TB-10
Ready
150VAC, 150mA
18
16
2.2 lb-in
Figure 3-3: M3545P I/O Diagram
GROUND
READY
OUTPUT COM
N/C
FAULT RECALL
INPUT COM
3.5. TYPICAL CONFIGURATIONS
The diagrams shown in Figure 3-4 and Figure 3-5 illustrate typical connections of the
M3545P units with generic VFDs. There are many other configurations that may be
applied provided a basic connection criterion is maintained such as:
•The AC Line connections should maintain a low impedance path back to the grid.
•No reactors should be connected upstream of the M3545P unit without consulting
Bonitron for instructions.
•The DC link should be connected to a fixed bus whether from a common bus
supply or from the output of a VFD. This should never be connected to a switching
source such as the braking resistor terminals on some drives.
•The DC link should not be connected to an active front end drive without
instructions from Bonitron.
M3545P
18
•Any capacitive load requires precharge. Ensure that either the load has internal
precharge, or that the M3545P unit has a –R option. Units without the –R option
do not support precharge of any amount of capacitance. Applying power with no
precharge in the system will result in fuse failure, and possible damage to the unit
and load.
Figure 3-4: M3545P Power Wiring
Disconnect Isolation
Transformer
(if used)
3
M
3
DC+
DC-
INVERTER
Precharge
"R" Option
Only
User’s Manual
19
Figure 3-5: M3545P Multiple Drives Field Wiring Diagram
M
3
Disconnect Isolation
Transformer
(if used)
3
M
3
M
3
DC+
DC-
DC+
DC-
DC+
DC-
INVERTER
INVERTER
INVERTER
Precharge
"R" Option
Only
M3545P
20
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