1、AMSC N/A FSC 6115 PERFORMANCE SPECIFICATION SHEET GENERATOR SYSTEM, ALTERNATING CURRENT INTEGRALLY EXCITED, BRUSHLESS (P-3 AIRCRAFT) This specification is approved for use by the Naval Air Systems Command and is available for use by all Departments and Agencies of the Department of Defense The requi
2、rements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-21480. SCOPE 1. Generator class. The generator is classified as a class W as modified herein. 2. Part or identifying number (PIN). Components that make up the generator systems covered by this sp
3、ecification sheet are identified using the following PIN: Generator - MS90325-1 (see figure 1) Generator Control Unit (GCU) MS90325-4 (see figure 3) Current Transformer (CT) MS90325-5 (see figure 4) APPLICABLE DOCUMENTS 1. Add the following specifications and standards to MIL-PRF-21480: 2.2.1 Specif
4、ications and standards. Add the following documents: MIL-PRF-27617 Grease, Aircraft and Instrument, Fuel and Oxidizer Resistant. MIL-PRF-83287/1 Indicators, Fault Locating, Flag Indicating, Mechanical Reset. MS14169 Circular Spline and Adapter Details Engine Driven Accessories.INCH-POUNDMIL-PRF-2148
5、0/24(AS) 22 March 2010 SUPERSEDING MS90325G(AS) 15 February 1980 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-21480/24 2 MS18056 Mounting flanges for Aircraft Electric Equipment, Circular, 5-, 8-, and 10-inch. (Inactive for new design) 2.3
6、 Non-Government publications. Add the following documents: SAE-AS5131 Tube End Beaded, Design Standard. (DoD adopted) SAE-AS31021 Connector, Receptacle, Electric, Box Mounting, Solder Contacts, AN Type. (DoD adopted) SAE-AS34521 Connector, Receptacle, Electric, Box Mounting, Rear Release, Crimp Cont
7、act, AN Type. (DoD adopted) SAE-AS25036 Terminal, Lug, Crimp Style, Copper Insulated, Ring Tongue Bell-mouthed, Type II, Class 1 (for 105 C Total Conductor Temperature). (DoD adopted) REQUIREMENTS 1. Dimensions and weight. The dimensions of the generating system components shall be as shown on figur
8、es 1 through 4 of this specification sheet. 2. Capacity. The rating of the generating system shall be not less than 60/70 kVA. See 3.4.8 and sub-paragraphs as modified herein. 3. Generator system characteristics. The generator system characteristics shall be as shown in table I of this specification
9、 sheet. 4. MIL-PRF-21480 variance: The generating system shall comply with MIL-PRF-21480 except as follows: 4.1 The following paragraphs are not applicable: 3.4.2.7.2 Aircraft platform vibration, subparagraphs a, b, c only. 3.4.2.9 Water intrusion and immersion. 3.4.2.10 Chemical, biological, and ra
10、diological (CBR). 3.4.2.11 Lightning, electromagnetic pulse, and directed energy weapons. 3.4.4 Explosive atmosphere. 3.4.8.2.1 Motor starting (AC power). 3.4.8.2.2 Emergency overload (AC power). 3.4.9.2.3 Maximum torque. 3.4.9.2.4 Flexible drive. 3.4.9.6.2 Liquid cooling, 3.4.9.6.2 and subparagraph
11、s a through e. 3.5.6 Simultaneous load and speed transients. 3.5.7.5 Overcurrent protection (short circuit AC current limit). 3.5.7.6 Feeder fault, subparagraphs a, b, and c only 3.5.7.8 Bus fault isolation. 3.5.7.9 Waveform protection (extraneous AC distortion and DC content). 3.5.7.10 Arc fault po
12、wer feeder protection. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-21480/24 3 3.5.9 Paralleling. 3.5.10 Generator output characteristics. 4.4 Coolant temperature, subparagraph d only 4.5.3.2 Electrical performance at minimum temperature,
13、subparagraph c only 4.5.3.3 Electrical performance at maximum temperature, subparagraphs g and h only 4.5.6 Load and speed transients. 4.5.8 Phase balance, subparagraphs a, b, and c only 4.5.14 Temperature Altitude, subparagraph b. Liquid cooled generator system only 4.5.17 Protective Functions, sub
14、paragraph d. Overfrequency protection only 4.5.19 Maximum generator torque. 4.5.23.2.2 Test procedure for non-engine mounted components, subparagraphs a and c only 4.5.26 Rainwater intrusion. 4.5.28.2 Liquid cooled components, paragraph 4.5.8.2 and subparagraphs a and b 4.5.29 Loss of cooling, subpa
15、ragraph b only 4.5.32 Explosive atmosphere. 4.5.33 Toxicity and fire resistance. 4.5.34 Coolant contamination. 4.5.36 Reliability and maintainability. 4.2 Modify the following paragraphs of MIL-PRF-21480: 3.3.2 Moisture resistance. Add the following to the end of the paragraph: “Externally mounted c
16、onnector receptacles shall be environment resistant conforming to SAE-AS31021 (class E or class R), or SAE-AS34521 (class W).” 3.4.2.1.1 Blast air-cooled and integral fan-cooled components. Delete the last sentence and substitute: “The altitude limit for continuous operation is 30,000 feet.” 3.4.2.1
17、.2 Liquid-cooled and self-cooled components. Delete the last sentence and substitute: “The GCU and CT altitude limit for continuous operation is 30,000 feet.” 3.4.2.7.1 Engine vibration. Delete paragraph in its entirety and substitute: “The generator shall withstand the vibration test of 4.5.23.2.1
18、using the vibration spectrum of MIL-PRF-21480, figure 4. The acceleration spectral density of the functional broadband level (W0) shall be 0.30 g2/Hz and the frequency (f0) of the first narrow band random spike shall be 17 Hz (see 6.6.3.2).” 3.4.2.7.2 Aircraft platform vibration. Delete paragraph in
19、 its entirety and substitute: “The GCU and CT shall withstand the vibration of 4.5.23.2.2.b, as modified by this specification sheet using the vibration spectrum of MIL-PRF-21480, figure 6. The acceleration spectral density of the functional broadband level (W0) shall be 0.010 g2/Hz and the frequenc
20、y (f0) of the first narrow band random spike shall be 68 Hz (see 6.6.3.2).” 3.4.3 Operating position. Add: “The generator shall meet the requirements of MIL-PRF-21480.” Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-21480/24 4 3.4.5 Configur
21、ation. Delete first sentence and substitute: “See table I and figures 1 through 4 of this specification sheet for component weights, dimensions and center of gravity requirements. See figure 5 of this specification sheet for the electrical interconnection requirements.” 3.4.6 Consolidation of genera
22、ting system components. Delete the last sentence and substitute: “The generator control unit shall be a separate component from the generator package (see 6.8.9).” 3.4.7.1 Manual system control. Delete the first sentence and substitute: “Manual system control of the AC power source shall be provided
23、 by a three-position switch, type II (see 6.8.2b).” 3.4.8.1 Continuous capacity (AC power). Delete paragraph in its entirety and substitute: “The generator AC power source shall be capable of continuously delivering power from no load to full load with balanced and phase load unbalances defined in p
24、aragraph 3.5.3, as modified by this specification sheet. During self-cooled operation with load unbalances as defined in 3.5.3, the generator capacity shall be not less 60/70 kVA. During blast-cooled operation with load unbalances defined in paragraph 3.5.3, the generator capacity shall be not less
25、than 60/85 kVA.” 3.4.8.2 Overload capacity (AC power). Add the following to the end of the paragraph: “Generator overloads shall be based on the 60 kVA slash rating.” 3.4.8.3 Short circuit capacity (AC power). Delete the first two sentences and substitute: “The minimum short circuit current capacity
26、 shall be 300 percent of the 60 kVA slash rating (see 6.8.16).” Delete last sentence. 3.4.8.4 Integral control power capacity. Delete the first sentence and substitute: “The generator PMG shall supply all of the integral control power required for generator excitation, control, and GCU DC output, ex
27、cept for aircraft DC power supplied to the GCU connector (pin G) for latching of differential fault protection relays (see 6.8.17).” 3.4.8.4.1 Excitation and control of AC power. Add the following to the end of the paragraph: “A redundant fly-wheel diode shall be incorporated in the GCU to protect t
28、he excitation power from voltage transients emitted by the generator exciter field.” 3.4.8.4.2 Rating of DC power source. Delete paragraphs (a, b, c) and add: “a. Rated capacity - The DC power source shall be capable of continuously delivering not less than 1.5 amps from the DC output of the GCU con
29、nector (pin a). b. Overload capacity - The DC power source shall be capable of delivering 3.0 amps for five seconds. c. Short circuit capacity - The DC power source shall be capable of delivering not less than 5.0 amps into short circuit faults.” Provided by IHSNot for ResaleNo reproduction or netwo
30、rking permitted without license from IHS-,-,-MIL-PRF-21480/24 5 3.4.9.1 Shaft speed. Delete last sentence and substitute: “The generator shaft acceleration and deceleration shall be 1000 rpm per second as shown in table I of this specification sheet.” 3.4.9.1.2 Overspeed. Delete paragraph in its ent
31、irety and substitute: “The generator overspeed shall be as shown in table I of this specification sheet. The generator shall be capable of operating at overspeed for 5 minutes without mechanical failure or impairing subsequent electrical performance.” 3.4.9.2 Mounting and driving provisions. Delete
32、the first two sentences and substitute: “The mounting flange, including twelve holes and nut seats, shall be in accordance with the dimensions of MS18056, 10-inch size (MS90325-1 flange design shall not require the MS18056 provisions for V-band clamp mounting).” 3.4.9.2.1 Shaft spline. Delete the la
33、st sentence and substitute : “The generator shall be in accordance with the SAE-AS14169 1 inch size (see figure 2 of this specification sheet).” 3.4.9.2.2 Shear section. Delete second sentence and substitute: “The torque range for shaft shear shall be as shown in table I of this specification sheet.
34、” Add the following paragraph: “3.4.9.2.5 Main bearing failure. The generator design shall incorporate an auxiliary bearing to take over support of the generator rotor upon failure of the primary drive end bearing. To activate the aircrafts generator failure warning light, the generator shall supply
35、 a ground connection to pin W of the generator terminal block upon failure of the primary drive end bearing.” 3.4.9.3 Electric connections. Add the following at the end of 4.9.3a: “All generator terminal studs shall be stainless steel with minimum hardness of Rockwell C-34. Terminal block designs sh
36、all incorporate insulation barriers between terminal connections with clearance to accommodate installation of SAE-AS25036 wiring lugs as specified.” Add the following at the end of 3.4.9.3b: “The three studs marked as G, P, and W (size 10-32 UNF-3A) shall be not less than 0.468 inches in length wit
37、h clearance for SAE-AS25036-103 lug installation. The two studs marked as F0and F1(size 1/4-28 UNF-3A) shall be not less than 0.453 inches in length with clearance for SAE-AS25036-157 lug installation. The three studs marked as T1, T2, and T3(size 3/8-24 UNF-3A) shall be not less than 0.667 inches i
38、n length with clearance for SAE-AS25036-122 lug installation. The three studs marked T0(size 3/8-24 UNF-3A) shall be not less than 0.667 inch in length with clearance for SAE-AS25036-125 lugs. A shunting bar connecting the three neutral terminals (T0) shall be attached to the generator.” 3.4.9.4 Dir
39、ection of rotation. Delete the first sentence and substitute: “The direction of rotation shall be as shown in table I of this specification sheet.” 3.4.9.5 Efficiency (heat rejection). Delete the paragraph in its entirety and substitute: “Generator system efficiency at nominal speed with 70 kVA load
40、 (0.75 lagging to unity power Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-21480/24 6 factor) shall be not less than 80 percent. Generator system efficiency at nominal speed with 85 kVA load shall be not less than 77 percent.” 3.4.9.6.1a.
41、Air inlet/outlet. Add the following at the end of the paragraph: “See figures 1 and 2 of this specification sheet for Air inlet/outlet requirements.” 3.4.9.6.1b. Temperature-altitude rating. Delete the last sentence and substitute: “The rated blast air airflow at 60 kVA shall be 12.6 pounds per minu
42、te.” 3.4.12 Markings. Delete the third sentence and substitute: “See figures 1 through 3 of this specification sheet for generator, generator control unit and current transformer nameplate locations.” 3.5.1.1 Voltage limits for AC power source. Delete figure 10 and substitute figure 6 of this specif
43、ication sheet. Add the following to the end of the paragraph: “The generator control unit shall be adjusted at room ambient so that the generator delivers 1170.5 volts at the point of regulation when the generator is operating at no load and 6000 rpm.” 3.5.1.2 Voltage limits for DC power source (see
44、 3.4.8.4.2). Delete sentences two through four and substitute: “DC power for external use shall be furnished for maintaining contactors including conditions during short circuits. This DC power shall have the following characteristics: 20 VDC minimum; 30 VDC maximum; and 2 volts peak-to-peak ripple
45、and rated minimum output 2 amperes continuous.” 3.5.2 Voltage modulation (AC power source). Delete the paragraph in its entirety and substitute: “The voltage modulation shall not exceed an amplitude of 1.25 volts as measured peak to peak difference between the minimum and the maximum voltage reached
46、 during any one second.” 3.5.3 Voltage unbalance and phase displacement. Delete the paragraph in its entirety and subparagraphs a, b, and c and substitute: “The percentage of phase load unbalance (see 6.8.13), shall be based on the generator 60 kVA self-cooled capacity. For generator inputs within t
47、he specified range for rated output (see 6.8.7), the AC phase voltage unbalance and displacement shall conform to the following:” a. The AC power source shall conform to the requirements herein with phase load unbalance up to 16.7 percent. For phase load unbalances of 16.7 percent (or less), the pha
48、se voltage shall be within the following limits: (1) displacement between phases shall be within phase angle limits of 119 and 121, excluding harmonics; (2) voltage unbalance between phases shall not exceed 1.5 volts; and (3) the average of all three phase voltage shall remain within the steady stat
49、e limits of figure 6 of this specification sheet. b. The AC power source shall conform to the requirements herein with phase load unbalance up to 33.3 percent. For phase load unbalances of 33.3 percent (or less), the phase voltage shall be within the following limits: (1) displacement between phases shall be within phase angle limits of 118 and 122, excluding harmonics; (2) voltage unbalance
