SECTION VI. RADIO INTERFERENCE SUPPRESSION

Table 4-3. Unit Troubleshooting (Continued) - TM-9-6115-604-12_232

Figure 4-11. Fan and Motor Assembly and Related Parts

TM-9-6115-604-12 Generator Set Diesel Engine Driven Tactical Skid Rtd. 60 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
Page Navigation
216

ARMY TM 9-6115-604-12 NAVY NAVFAC P-8-633-12 SECTION VI. RADIO INTERFERENCE SUPPRESSION 4-9. GENERAL METHODS USED TO ATTAIN PROPER SUPPRESSION . Essentially, suppression is attained by providing a low resistance path to ground for stray currents. The methods used include shielding the wires, grounding the frame with bonding straps, and using a filtering system. 4-10. INTERFERENCE SUPPRESSION COMPONENTS. a. Primary Suppression Components. The primary suppression components are those whose primary function is to suppress radio interference. Voltage regulator VR101 contains an electromagnetic interference (EMI) suppression assembly to eliminate any possible effects of EMI on the functioning of its component parts. Surge suppression capacitor C101 grounds radio frequency emissions generated by generator G1 VR101 and C101 are maintained by higher level maintenance personnel. b. Secondary Suppression Components. These components have radio interference suppression functions which are Identical or secondary to their primary function. Housing assembly components fully enclose the generator set and are all grounded. The housing is, effectively, an RFI shield for the entire generator set. NOTE Check with local facility engineer to be sure generator set will not produce RFI detrimental to the operation of electronic equipment. This is especially Important near air fields and missile sites. SECTION VII. MAINTENANCE OF HOUSING ASSEMBLY 4-11. GENERAL. Unit maintenance of the housing assembly consists primarily of removal, repair or replacement of damaged components, and re-installation after repair/replacement 4-12. FAN AND MOTOR ASSEMBLY B103, FAN SHUTTER ASSEMBLY, FIRE EXTINGUISHER BRACKETS, DESK TOP, AND DOCUMENT COMPARTMENT . Maintenance of the fan and motor assembly B103, fan shutter assembly, desk top, and document compartment is accomplished by replacement of damaged components or strengthening and welding, if possible. The fire extinguisher is rechargeable. a. Fan and Motor Assembly B103. (1) Test. (a) Set control room circuit breaker CB109 (5, Figure 2-8), located In distribution panel DP1 to ON, fan and motor assembly B103 (4, Figure 4-11) should operate (b) If fan and motor assembly B103 (4) does not operate, ensure that fan rotates freely by inserting a screwdriver through the fan grill and manually rotating the fan. (c) If fan and motor assembly B103 (4) does not rotate freely, check for mechanical obstructions, or bent or broken blades (d) If fan and motor assembly B103 (4) rotates freely, check for presence of 120 V ac at fan motor electrical wires In the conduit box mounted to the fan motor housing. (e) Test the motor start capacitor. Using a multimeter, set on RX1 scale, perform a continuity check on the capacitor. The multimeter should read Infinity. If the multimeter Indicates a closed circuit, the capacitor is shorted and must be replaced. (f) Replace the fan and motor assembly B103 (4) if 120 V ac is present and fan does not operate. 4-33

Privacy Statement
Press Release
Contact