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Basler Electric Rotating Exciter Diode Replacement Modules
Q: What is the best delivery time?
Q: Can only a few modules be replaced during anoutage or must all modules be replaced at onetime? In other words, can the Basler modulesbe mixed with functional existing OEM mod-ules?
Q: What is the purpose of the endplates on thesample module with the hockey puck diodes?
Q: What is the material composition of the spacersfor the hardware that compresses the “hockeypuck” diode heat sinks?
A. We need a sample diode module for all applica-tions to determine the proper replacement moduleand to prepare a formal quote. If we haven’tmanufactured a module that duplicates the origi-nal, we can provide a prototype for review in four(4) weeks after receiving a sample module fromthe customer. . After approval of the prototypemodule, we can deliver as many modules asrequired in an additional four (4) weeks. If adesign already exists, we can provide as manymodules as required in four (4) weeks.
A: All diodes in a single phase of the three phasearmature winding must be replaced with newBasler replacement modules. If the failed diodemodules are in multiple phases, then all of themodules in a defective phase must be replaced. Asample module is required to match the weight ofthe replacement diode to insure all replacementBasler diodes in that phase are matched electri-cally and mechanically.
A: The original sample unit supplied for our examina-tion had the endplates on them. The purpose forthe original endplate was to cover the epoxy filledcapacitor cavity behind it. To keep the new designas close as possible to the original, the endplateswere retained in the design of the new replace-ment module. The endplates provide beneficialelectrical insulation between the module base andother components in the brushless exciter.
A: The material is G-10, same as the material used inthe original Westinghouse module.
ROUTE 143, BOX 269, HIGHLAND, ILLINOIS U.S.A. 62249 PHONE +1 618.654.2341 FAX +1 618.654.2351http://www.basler.com, [email protected]
Typical Questions and Answers
Typical New DiodeAssembly
Basler Electric Rotating Exciter Diode Replacement Modules
Page 2
BRUSHLESSFAQ (10/04)
Q: Are the capacitors in the hockey puck designreplaceable even though they are enclosed inpotting material?
Q: With the hockey puck design, is the connectionpost in the center of the module silver plated,plated with some other material, or is it manu-factured from a different metal than what thatused for the module base?
Q: How do you make sure that hardware doesn’tvibrate loose in operation?
Q. Can Basler Electric exactly match the weight ofthe original module?
Q: How do you avoid problems with patent rights/infringement?
Q. Who can I call for more information?
A: Yes, the capacitors are replaceable, but not in thefield. Basler Electric must replace the capacitors atthe factory to meet the tight weight tolerancesrequired to minimize balancing problems at the post-outage startup.
A: The connection post is tin plated aluminum. Thebase is not plated at all at the request of the originalcustomer for which the new product was designed.
A: On production diode modules, lock washers andLoctite™ are used on all hardware. Note: Sampleunits used for demonstration purposes are made foreasy disassembly.
A. Yes, with a sample provided, Basler Electric canduplicate the weight of the original sample, within atolerance of ± 0.03%.
A: The patents for the OEM designs have expired.Therefore, anybody is free to reverse engineer theoriginal module designs.
A. Contact the Basler factory at 618-654-2341 or sendan email to [email protected].
New Replacement DiodeModule Disassembled
New Diode Assembly
ROUTE 143, BOX 269, HIGHLAND, ILLINOIS U.S.A. 62249 PHONE +1 618.654.2341 FAX +1 618.654.2351http://www.basler.com, [email protected]