6-9. Cleaning, Inspection, and Testing.a.Cleaning.Clean all components with a clothdampened in cleaning solvent, Federal SpecificationP-D-680.b.Inspection. Refer to Operator and Organiza-tional Maintenance Manual.c. Testing.—(1) To test CTl, CT2, and CT3 on either ModeI or Mode II sets, proceed as follows:(a) Wrap 10 turns of a conductor around thecoils of cm.(b) Apply an ac current of 10 amperes tothe conductor.(c) The current measured at terminals Aland A2 must be 360 ma.(d) Repeat steps (a) through (c) on CT2 andCT3. Measure CT2 at terminals B1 and B2; meas-ure CT3 at terminals Cl and C2.(2) To test CT4, CT5, and CT6 on either ModeI or Mode II sets, proceed as follows(a) Apply 20.7 volts (rms) 60 Hz acrossterminals l and 3.(b) Voltage between terminals 1 and 2 shallmeasure 16. 5 ± 1 percent Vac.(c) Excitation current shall be less than36 ma.(d) Apply 50 amperes 60 Hz through 1primary turn.Secondary current should be 180 ma± 1% at terminals 1-3.(3) To test CT7 on Mode II sets, proceed afollows:(a) Apply 15 volts (rms) 400 Hz across,terminals 1 and 2.(b) The excitation current shall be less than45 ma (rms).(c) Apply 50 amperes 400 Hz through 1primary turn.Secondary current should be 250 ma± 1%.(4) To test CT7 on Mode I sets, proceed asfollows:(a) Apply 15 volts (rms) 60 lb across ter- minals 1 and 2.(b) Excitation current shall be less than60 ma (rms).(c) Apply 50 amperes 60 Hz through 1primary turn.Secondary current should be 250 ma± 1%.6-10.a.b.c.6-11.Repair.Replace defective current transformers.Replace worn grommets.Replace all gaskets with new ones.Reassembly and Installation.a. ReassemblySee figure 6-4 and reassemblethe current transformer assembly.b. Installation.See paragraph 6-8 and install thecurrent transformer assembly.6-8 Change 1
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