Generator Questions and Answers.docx

Vendor Questions

1. Aircraft Output Cables

· Should the contractor furnish the aircraft output cables as part of this requirement, or does the Government intend to use existing output cables already on site?

Answer: The contractor should furnish the aircraft output cables as per SOW requirements.

2. Cable Type

· If the contractor is required to provide the aircraft output cables, what type of cables are required (e.g., Split-F, Non-Jumpered, or another configuration)?

Answer: Not sure what is being asked as far as type of cable. Per the requirements we need the following:

· Input: 380 to 480 V +10%/-15%, 3-phase, 50/60 Hz; full load input current 186 A (at 480 VAC)

· Output 1: 115 V L-N / 200 V L-L, 3-phase, 4-wire, 400 Hz

· Output 2: 115 V L-N / 200 V L-L, 3-phase, 4-wire, 400 Hz

3. Cable Lengths

· Please provide the required length of:

· The WIH-15 Input Cable (CLIN 0002).

Answer: Input cable length is 15 feet.

· Each WOA-80M AC Output Cable (CLIN 0003).

Answer: Output cable length is 80 feet.

4. Cable Routing Information (if exact lengths are unavailable)

· If exact cable lengths cannot be provided, please provide the approximate cable run distance from the converter's installed location at Building 2201, Main Hangar Door, to:

· The electrical connection point.

Answer: 8 feet would be acceptable.

· The aircraft servicing position.

Answer: 40 feet would be acceptable

5. Cable Specifications

· Please provide any applicable cable specifications, drawings, conductor size, connector/end-fitting details, or other technical requirements for the WIH-15 and WOA-80M cable assemblies.

Answer: Please see below for specifications directly from manufacturer quote.

GENERAL SPECIFICATIONS

INPUT:

Input Current Distortion ≤ 5%, typically 3% Voltage

Frequency Phase Rotation Protection

Inrush Current 380 to 480 volts, +10%, -15%, 3Ø, 3 or 4 wire plus ground (Alternate Voltages Available) 45 - 65 Hz ± 10% Any Over/undervoltage, loss of phase, overcurrent, short circuit. Voltage transient protection IAW IEEE C62.41.1, Location Cat. B/C No greater than 100% of full load current

ENVIRONMENTAL:

Acoustical Noise < 65 dBA maximum at 5 feet (1.5m) Temperature Range -40°C to +55°C Relative Humidity 10 - 95%, Non-Condensing Ingress of Water Type 3SX, IP55

ENERGY FACTORS:

Efficiency

Energy Efficiency Ratio 94% typical at full load; 92% typical at half load; varies depending on configuration

20.0 typical

OUTPUT:

Power Rating Power Factor Range Overload

Voltage*** Crest Factor Voltage Regulation

Voltage Transients Frequency Regulation

Frequency Transients Phase Angle Regulation

Harmonic Distortion Protection

Automatic Line Drop Compensation (ALDC) 120, 150, or 180 kVA (Specify)

0.5 lagging to 0.8 leading 100% continuous 110% for 60 min 125% for 10 min 150% for 2 min 200% for 20 sec 115/200 volts, 3Ø, 4 wire, grounded neutral

1.414 ± 3% ± 1.0% under all conditions of line, balanced loads and temperature

IAW MIL-STD-704F

400 Hz ± 0.01% under all conditions of line, load and temperature None ± 1° for balanced loads;

± 2° for unbalanced loads 2.0% maximum Overload, short circuit, over/undervoltage and safety disconnect 15%

6. Manufacturer Standard Cables

· If no Government-specific cable specifications or drawings exist, should vendors quote the manufacturer-standard WIH-15 input cable and WOA-80M output cables that are compatible with the UFC-180H or equivalent frequency converter system?

Answer: Yes, please quote the manufacturer standard cables that are compatible with the UFC-180H.