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Installation Instructions
Original Instructions
PowerFlex DC Field Controller Overvoltage Protection Device
Catalog Numbers 23P-FCOVPD-B-FA, 23P-FCOVPD-B-FB, 23P-FCOVPD-D-FA, 23P-FCOVPD-D-FB, 23P-FC-RB100, 23P-FC-RB200, 23P-FC-RB300, 23P-FC-RB400,
23P-FC-RB500
Topic
The overvoltage protection device (voltage clamp) helps to provide protection against overvoltage for the PowerFlex® DC field controller when
used with a highly inductive load. An overvoltage can occur when the AC supply voltage is turned off before the field controller is disabled. The
resulting overvoltage can damage the field controller.
The voltage clamp (cat. no. 23P-FCOVPD-x-Fx) is composed of a pair of Silicon Controlled Rectifier (SCR) modules and a circuit board. The
circuit board detects the load voltage level. When a potentially damaging voltage level is detected, the voltage clamp activates the appropriate SCR,
based on the direct of current flow. The SCRs conduct the excess current and allow the resistance in the motor field to gradually decay. The voltage
clamp must not be used to discharge inductive loads routinely. The voltage clamp requires approximately 30 minutes to dissipate the energy from an
overvoltage condition before power can be reapplied to the device.
A dampening resistor (RB) must be installed in combination with the voltage clamp. The dampening resistor is required to dampen the overvoltage
that results from undershooting holding current when the voltage clamp SCR stops conduction. Dampening resistor kits (cat. no. 23P-FC-RBn00)
must be purchased separately. See Dampening Resistor on page
The voltage clamp enclosure is rated IP20 and the power terminals are rated IP00. The dampening resistor terminals are rated IP00. Therefore,
these devices must be enclosed in a protective enclosure or appropriate guards must be provided to help protect against an electric shock and/or
burn hazard.
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Table of Contents
Related Manuals for Allen-Bradley PowerFlex 3P-FCOVPD-B-FA
Summary of Contents for Allen-Bradley PowerFlex 3P-FCOVPD-B-FA
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Page 1: Table Of Contents
Installation Instructions Original Instructions PowerFlex DC Field Controller Overvoltage Protection Device Catalog Numbers 23P-FCOVPD-B-FA, 23P-FCOVPD-B-FB, 23P-FCOVPD-D-FA, 23P-FCOVPD-D-FB, 23P-FC-RB100, 23P-FC-RB200, 23P-FC-RB300, 23P-FC-RB400, 23P-FC-RB500 Topic Page Product Advisories Required Tools and Hardware System Wiring Diagram Dampening Resistor Optional External Discharge Resistor Voltage Clamp Thermostat Voltage Clamp Nameplate Data Product Dimensions and Weights Minimum Mounting Clearances... -
Page 2: Product Advisories
PowerFlex DC Field Controller Overvoltage Protection Device Product Advisories Qualified Personnel ATTENTION: Only qualified personnel familiar with DC drives, field controllers, motors and associated machinery should plan or implement the installation, startup, and subsequent maintenance of the system. Failure to comply can result in personal injury and/or equipment damage. Personal Safety ATTENTION: To avoid an electric shock hazard, verify that all power to the connected devices has been removed before you begin installation. -
Page 3: Dampening Resistor
PowerFlex DC Field Controller Overvoltage Protection Device Dampening Resistor A dampening resistor (RB) must be installed with the voltage clamp to dampen the overvoltage that results from undershooting holding current when the SCR stops conduction. Purchase and install the appropriate resistor kit that is listed in the Dampening Resistor (RB) Kits table, or use the sizing information to install a customer-supplied resistor. -
Page 4: Voltage Clamp Thermostat
PowerFlex DC Field Controller Overvoltage Protection Device Calculate the Peak Power Rating Value for Resistor RD Calculate the peak power rating value for RD in watts, where the initial current is equal to the load current. RD_peak_Power = (I_load) * RD Solve for RD_peak_Power. -
Page 5: Product Dimensions And Weights
PowerFlex DC Field Controller Overvoltage Protection Device Product Dimensions and Weights These illustrations provide the approximate dimensions and weights for the voltage clamp and dampening resistor kits. Use these dimensions for mounting these devices. Voltage Clamp Catalog Numbers 23P-FCOVPD-B-FA and 23P-FCOVPD-D-FA Dimensions are in millimeters and (inches) Maximum weight 5.25 kg (11.6 lb) 179.6 (7.1) - Page 6 PowerFlex DC Field Controller Overvoltage Protection Device Voltage Clamp Catalog Numbers 23P-FCOVPD-B-FB and 23P-FCOVPD-D-FB Dimensions are in millimeters and (inches) Maximum weight 5.25 kg (11.6 lb) 179.6 (7.1) 141 (5.6) 117 (4.6) 7 (0.3) 210 (8.3) 194 (7.6) 225 (8.9) 5 (0.2) 12.5 (0.06)
- Page 7 PowerFlex DC Field Controller Overvoltage Protection Device Dampening Resistor Dimensions Dimensions are in millimeters and (inches) Weight 3.9 kg (8.6 lb) 502 (19.8) 526 (21.1) (Name plate) 64 (2.5) 48 (1.9) 24 (0.9) R7.0 (0.3) 6.5 (0.3) 50 (2.0) 426 (16.8) Rockwell Automation Publication 23PFC-IN002A-EN-P - November 2018...
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Page 8: Minimum Mounting Clearances
PowerFlex DC Field Controller Overvoltage Protection Device Minimum Mounting Clearances The minimum clearances that are specified in this section must be provided to help avoid device overheating. Voltage Clamp Clearances Minimum clearance requirements for the voltage clamp are intended to be from device to device. Other objects can occupy this space; however, reduced airflow can cause the voltage clamp to overheat. -
Page 9: Install The Voltage Clamp And Dampening Resistor
PowerFlex DC Field Controller Overvoltage Protection Device Install the Voltage Clamp and Dampening Resistor Follow these steps to install the voltage clamp and dampening resistor with a PowerFlex DC field controller. Remove Power from the PowerFlex DC Field Controller ATTENTION: Remove power before making or breaking cable connections. When you remove or insert a cable connector with power applied, an electric arc can occur. - Page 10 PowerFlex DC Field Controller Overvoltage Protection Device Wire the Voltage Clamp Use the information in this section and the System Wiring Diagram on page to wire the power and ground (PE) connections on the voltage clamp. Voltage Clamp Power, Ground, and Thermostat Terminal Identification Thermostat Terminal Block (TB1) Voltage Clamp Power and Ground (PE) Terminal Specifications...
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Page 11: Additional Resources
Provides declarations of conformity, certificates, and other certification details. http://www.rockwellautomation.com/global/certification/overview.page You can view or download publications at http://www.rockwellautomation.com/global/literature-library/overview.page. To order paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation sales representative. Rockwell Automation Publication 23PFC-IN002A-EN-P - November 2018... - Page 12 Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, PowerFlex, Rockwell Automation, and Rockwell Software are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies. Rockwell Otomasyon Ticaret A.Ş., Kar Plaza İş Merkezi E Blok Kat:6 34752 İçerenköy, İstanbul, Tel: +90 (216) 5698400...