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User’s Manual

15

4.

O

PERATION

4.1.

F

UNCTIONAL

D

ESCRIPTION

The Ride-Thru Impedance Module provides the necessary impedance to prevent the
propagation of circulating currents between the variable frequency drive and the Ride-Thru
Module.  Stray circulating currents cause heating in the components of the Ride-Thru and the
variable frequency drive.  The addition of the Impedance Module adds a fixed voltage drop in
the negative link in the connection between the boost regulator and the drive.  Please see
Section 7 for further details.

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Summary of Contents for M3460RD

Page 1: ...Web www bonitron com Tel 615 244 2825 Email info bonitron com Model M3460RD Impedance Module For Sag Ride Thru Applications without Energy Storage Customer Reference Manual ...

Page 2: ...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 ...

Page 3: ...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...

Page 4: ...M3460RD 4 This page intentionally left blank ...

Page 5: ...ION 15 4 1 Functional Description 15 5 STARTUP MAINTENANCE AND TROUBLESHOOTING 17 5 1 Startup 17 5 1 1 Pre Power Checks 17 5 1 2 Startup Procedure 17 5 2 Maintenance 17 5 3 Troubleshooting 17 5 3 1 Ridethrough System does not hold up the drive during a sag event 17 5 3 2 Circulating currents between drives or Heatsink in the M3460R gets hot 17 5 4 Technical Help before you call 17 6 ENGINEERING DA...

Page 6: ...M3460RD 6 This page intentionally left blank ...

Page 7: ...el M3460RD Impedance Module It will provide the user with the necessary information to successfully install integrate and use the M3460RD module in a variable frequency AC drive system In the event of any conflict between this document and any publication and or documentation related to the AC drive system the latter shall have precedence 1 3 MANUAL REVISION RECORD The initial release of this manu...

Page 8: ...tifies 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 statemen...

Page 9: ...M3460RD Part Number Breakdown BASE MODEL NUMBER The Base Model Number for the Impedance Modules for use with M3460R Ride Thru Modules is M3460RD CURRENT RATING The maximum current rating of the M3460R Ride Thru module is designated by this value in amperes M3460R Ride Thru modules rated 85A 255A should use 255 M3460R Ride Thru modules rated 340A 425A should use 425 2 3 GENERAL SPECIFICATIONS Table...

Page 10: ...NTS WITHIN THIS PRODUCT MAY GENERATE HIGH AMBIENT TEMPERATURES DURING OPERATION 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 AC DRIVE DOCUMENTATION FOR PERTINENT SAFETY PRECAUTIONS INSTALLATION AND OR REMOVAL OF THIS PRODUCT SHOULD ONLY BE ACCOMPLISHED BY A QUALIFIED ELECTRICIA...

Page 11: ...installation site has been selected as outlined above the unit should be mounted in place Mounting holes should be drilled and mounting studs or anchors installed before positioning the M3460RD Module Once the studs or bolts are in place the module can be mounted Be sure all mounting hardware is tightened securely Refer to Section 6 of this manual to determine the correct mounting dimensions and p...

Page 12: ...us terminals See the operation manual for your drive 3 4 1 2 M3460R OUTPUT BUS CONNECTION The M3460R Output Bus should be connected to the negative side of the ouput bus on the M3460R module Connecting to the positive side of the M3460R Output Bus carries a high risk of damaging drive equipment if energized ...

Page 13: ...D DOWNSTREAM 2 IF LINE CHOKES ARE USED RIDE THRU MUST BE 1 INVERTER AND RIDE THRU SHOULD BE POWERED NOTES CHOPPER BRAKING INTERNAL VFD INVERTER BRAKING RESISTOR DISCONNECT DRIVE FEED AC CHOKES LINE GROUND FAULT SENSING DISCONNECT RIDE THRU M3460R CHOPPER DRIVE BUS STORAGE BUS STORAGE BUS M3460RD DRIVE BUS M3460R OUTPUT BUS Dwg 010175 Rev 20140502 ...

Page 14: ...INVERTER AND RIDE THRU SHOULD BE POWERED NOTES CHOPPER BRAKING INTERNAL VFD INVERTER BRAKING RESISTOR DISCONNECT DRIVE FEED AC CHOKES LINE GROUND FAULT SENSING DISCONNECT RIDE THRU M3460R CHOPPER DRIVE BUS STORAGE BUS STORAGE BUS M3460R CHOPPER DRIVE BUS STORAGE BUS STORAGE BUS M3460RD DRIVE BUS M3460R OUTPUT BUS M3460RD DRIVE BUS M3460R OUTPUT BUS Dwg 140076 Rev 20140505 ...

Page 15: ...currents between the variable frequency drive and the Ride Thru Module Stray circulating currents cause heating in the components of the Ride Thru and the variable frequency drive The addition of the Impedance Module adds a fixed voltage drop in the negative link in the connection between the boost regulator and the drive Please see Section 7 for further details ...

Page 16: ...M3460RD 16 This page intentionally left blank ...

Page 17: ...ESHOOTING 5 3 1 RIDETHROUGH SYSTEM DOES NOT HOLD UP THE DRIVE DURING A SAG EVENT Make sure the M3460RD is connected in the negative power return between the VFD and the M3460R Check the polarity of the installation of the M3460RD with respect to the M3460R and VFD The anode side of the M3460RD shold be connected to the VFD and the cathode side should be connected to the M3460RD 5 3 2 CIRCULATING C...

Page 18: ...M3460RD 18 This page intentionally left blank ...

Page 19: ...ted are figured at full load Losses occur and heat is generated only when the Ride Thru is active Ensure that enclosure cooling is adequate based on the duty cycle of the Ride Thru Module attached Maximum duty cycle for the M3460RD is 1 See Table 6 1 6 3 DIMENSIONS AND MECHANICAL DRAWINGS Figure 6 1 M3460RD Backplate Dimensional Outline 10 00 6 50 9 50 6 00 25 25 4x Ø 22 9 50 6 00 Dwg 140085 Rev 2...

Page 20: ...M3460RD 20 Figure 6 2 M3460RD 255 Chassis Outline 4 AWG WIRES Figure 6 3 M3460RD 425 Chassis Outline 2 AWG WIRES Dwg 140078 Rev 20140509 140077 Rev 20140509 ...

Page 21: ... and return to the AC source through the VFD input bridge This can occur through any parallel bridge arrangements if the impedances between the two do not prevent it When the system is operating normally the AC is at the nominal level and the boost converter is turned off In this case the VFD is powered only through the AC bridge in the VFD as the SCR s within the M3460 are turned off During a sag...

Page 22: ...choke and boost diode There are not as many elements in the negative power path and this can allow the current to continue to flow through the negative rail of the M3460 causing the negative SCR to latch on Figure 7 3 M3460R Typical Configuration with Circulating Current Flow CHOPPER BRAKING INTERNAL VFD INVERTER BRAKING RESISTOR DISCONNECT DRIVE DISCONNECT RIDE THRU M3460R CHOPPER DRIVE BUS STORA...

Page 23: ...egative power connection of the ride thru to the drive This prevents the circulation current from being sustained after a sag event The M3460RD unit adds roughly 5 Volts of drop between the VFD and the M3460 by adding series diodes Since this voltage drop is not dependant on current flow once the AC power returns to normal the negative power flow through the M3460 drops to zero and the SCR s turn ...

Page 24: ...R CHOPPER BRAKING INTERNAL VFD INVERTER BRAKING RESISTOR DISCONNECT DRIVE FEED AC CHOKES LINE GROUND FAULT SENSING M3528AC CHARGER ULTRA CAP ENERGY STORAGE BANK DISCONNECT RIDE THRU M3460R CHOPPER DRIVE RIDE THRU DISCONNECT AUX CONTACT BUS STORAGE BUS STORAGE BUS M 3 ISOLATION TRANSFORMER FROM THE SAME FEED TRANSFORMER CONNECTED DOWNSTREAM 2 IF LINE CHOKES ARE USED RIDE THRU MUST BE 1 INVERTER AND...

Page 25: ...User s Manual 25 NOTES ...

Page 26: ...M3460RD 26 This page intentionally left blank ...

Page 27: ......

Page 28: ...D_M3460RD_CMAN_VALL_00c 09 14 2014 521 Fairground Court Nashville Tennessee 37211 Tel 615 244 2825 Fax 615 244 2833 Web www bonitron com Email info bonitron com ...

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