FREQUENCY CONVERTER
2 EA FREQUENCY CONVERTER
400HZ PN: BG-180-400-V9/10/19
MINIMUM SPECIFICATION FOR TWO FREQUENCY CONVERTERS
1. Scope: This specification defines the minimum requirements for two solid state, 60 Hertz to 400 Hertz converters and includes details for the purchase of the two new 400 hertz converters with the options specified herein.
2. Application: The 400 hertz converters will be used by the Surveillance and Reconnaissance Division for testing various radar systems. It is important to note these systems produce a non-linear load. The converters will be located in buildings or enclosed shed type buildings that provide cover from the weather but are not necessarily heated or cooled.
3. Requirements
3.1 Applicable Documents: The 400 hertz converters shall comply with Unified Facilities Guide Specifications (UFGS) Section 26- 35-43 regarding 400 Hertz converters and MIL-STD-1399 for avionics.
3.2 Enclosures/Cabinets: The 400 hertz converter enclosures shall be of a structurally sound design that provide for absolute rigidity and provide protection to both the electrical equipment inside and the personnel working in the areas nearby during operation. The enclosures shall be a minimum of a NEMA
12 enclosures.
3.3 Converters:
a. The frequency converters shall be of solid state design "D" rated at 125 KVA (100 KW @ 0.8 power factor, lagging) continuous duty minimum.
b. The converters shall employ an active front end configuration (utilizing pulse width modulation (PWM) of an insulated-gate bipolar transistor (IGBT) rectifier, silicon controlled rectifiers (SCR) or diode rectifiers are not acceptable). Vendor shall state whether proposed unit has active front end using PWM.
c. Units shall operate at less than 5% current THD total and no more than 3% on a single harmonic up to the 50th harmonic with a power factor not below .9 at full load.
d. The 400 hertz current ratings shall be 100% RMS/Line continuous, 125% RMS/LINE for 1 hour, 150% RMS/LINE for 5 minutes, 200% RMS/LINE for 20 seconds and 300% for 6 seconds as a minimum.
e. Crest factor shall be within 3% of 1.414 sinusoidal wave form when unit is running at a steady state at all load ratings
including 1 - .8 power factor such that power is clean for testing and calibration purposes. Vendor shall state crest factor in proposal.
f. The converters shall be capable of 120/208 volts, 3 phase,
400 hertz (Wye configuration) capable of receiving input power at 480 volts, 3 phase 60 hertz as a minimum.
3.4 Machine Size: The frequency converters shall not require a foot print greater than 72"x 36" and shall not be over 78" high.
Vendor shall provide dimensions of proposed unit.
3.5 Features/Attributes: The frequency converter shall have the following features as a minimum:
a. Line side circuit breaker with electrical door interlock.
b. Input and output voltage and amperage shall be shown on LCD display on command from keypad.
c. Status Indicators: For "Power On", "Converter On", "Module Fault", "Input Voltage Fault", "Output Voltage Fault", "Overload" as a minimum.
d. Pushbuttons such as "Start" and "Stop/Reset" as a minimum.
e. Digital diagnostic system with fault indications provided on LCD display with a minimum of 100 line fault log history.
f. Output frequency shall be shown on the LCD display on command from keypad
g E & F interlock circuitry with bypass switch.
h. A three pole, non-automatic output circuit breaker, operable from front of unit, with shunt trip interlocked with protective devices.
3.6 Utilities: As stated above the frequency converter shall operate on 480 VAC 3 phase, 60 cycle power. The necessary amperes required shall be stated in the proposal/quotation.
4. Safety: The frequency converter shall meet all necessary operator safety requirements of OSHA 29 CFR 1910.212 as a minimum. In addition it shall meet or exceed the National Fire Protection Association (NFPA) requirements NFPA 79-1987 Electrical Standards for Industrial Machinery.
5. Documentation: The contractor shall provide one hard copy and one electronic copy set of operation and maintenance manuals with the converter. The electronic copy shall be via CD/DVD format. This documentation shall be provided at the same time as the converter delivery or earlier.
6. Delivery: a. Delivery of the frequency converter shall be
within 120 days of contract award.
b. Contractor shall coordinate delivery with the POC of this requirement, to include a pre-delivery notification at least 10 days prior to shipment of equipment.
c. (See also Solicitation Section F, paragraph entitled "Deliveries to Tobyhanna Army Depot (TYAD) - Contracting Officer's Instructions"; and "FAR 52.212-0001 Time of Delivery (APR 1984)".)
7. Twenty-One days after delivery of the converters, the Contractor shall come onsite for a day to perform a startup procedure to ensure that the 400Hz.is functioning properly. Startup procedure and field testing on each converter shall be performed by a factory technician skilled in the operation and theory of the frequency converters. Startup procedure shall include the inspection of the installation of the units completed by the government and Unit/field testing of the converters with government personnel present. The contractor shall provide field testing plans, testing equipment, test reports, operator's manuals and schematic outline. (If load banks are required they shall be provided by contractor.)
8. Warranty: The frequency converters furnished under this specification shall be warranted for a period of 1 year from the date of start-up for both parts and labor.
9. Production: The vendor shall demonstrate that he/she is regularly in the business of providing 400 Hz converters for commercial/industrial applications and the converters shall be fabricated/assembled with commercially available off the shelf parts such that they are supportable/maintainable throughout their life cycle. Vendors shall demonstrate this by providing references identifying that they have provided a minimum of three 400 Hz converter units 90 kva or greater in the past 18 months.
10. Notice: Submission of a Technical Proposal does not waive, negate, or reduce any stated Government specification or requirement. Vendor shall specifically state that unit being proposed is an active front end and what unit specifications are to include what the crest factor is. Any failure by the Government, prior to award, to discover and/or advise the offeror of any deficiency in the offeror's Technical Proposal/ Submissions shall not relieve the offeror from compliance with the requirements as stated in the Government's specifications.
Janeen Damiano, Purchasing Agent, Phone 5706159536, Email janeen.l.damiano.civ@mail.mil
