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Table 4-3. ELECTRICAL PERFORMANCE CHARACTERISTIC PARAMETERS AC PRECISE (CLASS 1) (CONTINUED)
NOTE - TM-9-6115-464-34_386

TM-9-6115-464-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 15 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-464-34 AIR FORCE TO 35C2-3-445-2 NAVY  NAVFAC  P-8-624-34 c. Generator With Separate Excitation. (1)   Preparation   for   test. (a) Completely isolate the generator windings (armature coils and field windings). (b) Connect the frequency meter to one of the armature coils of the generator. (c) Provide separate excitation for the exciter field. (2)  Test. (a) Start and operate the generatorat rated frequency and at no load. (b) Adjust the excitation so that anyone of the coil voltages is at rated value. (c) Read and record the generator frequency (speed) and the voltage of each armature coil. d.  Generator  With  Separate  Excitation: (1) Determine from the data obtained in 4-13d. (2) the maximum and minimum armature coil voltages. (2) The voltage unbalance is the difference between the maximum and minimum armature coil voltages. To express this in percent divide this difference by rated armature coil voltage and multiply by 100. Voltage Unbalance (Coil), in percent= V  max–V  min X 100 V  Rated (3) Compare the results of step (2) above with the requirements. 4-13. REGULATOR RANGE TEST a. General. The voltage adjust device associated with the voltage regulator provided with the generator set must have adjustment capable of varying the regulated voltage throughout the limits and under the various load conditions and temperature ranges without causing the voltage droop of the set to exceed specification limits. The voltage adjust device also must be capable in some cases of providing an operating voltage other than rated voltage for special types of equipment and to compensate for external line drop. b. Apparatus. Instrumentation for measuring load conditions, ambient temperature, and the generator field (or exciter field) voltage and current shall be as described and illustrated in MIL-HDBK-705. (1)   Preparation   for   test. (a)  Connect the load and field instrumentation in accordance with the applicable figure of MIL-HDBK-705, Method 205.1, Paragraph 205.1.10 for one voltage and frequency. c.  Procedure  for  Test. 4-8







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