Power Systems & Controls, Inc.

GUIDEFORM SPECIFICATION FOR SERIES IMG

The following specification is intended for use by consulting engineers to provide bidding specifications for products with the quality and performance characteristics provided by Power Systems & Controls' product listed above. The same specification can be used as a description of the listed Power Systems & Controls' product by substituting "provides" for "shall provide" or similar wording.

This specification is indexed according to the commercial standard instructions format and without this cover page has no reference to a particular vendor or product.

INDUSTRIAL MOTOR-GENERATOR

A. General Requirements

1. The bidder shall furnish a complete industrial motor-generator, as specified herein, and hereafter referred to as the "IMG", to provide continuous, regulated AC power to critical loads under normal and abnormal conditions.
2. The IMG shall be a rotary type with regenerated true sinusoidal, phase or voltage relationship output.
3. There shall be no electrical connections between the utility AC input and the regenerated output to the critical loads.
4. The IMG shall include a synchronized electromechanical automatic bypass contactor to switch the critical load without interruption from the IMG to the alternate AC source in the case of a fault condition.

B. The following shall be furnished along with the equipment

1. Factory Test Report
2. Protective Packing
3. Installation Drawings
4. Operators Manual

C. Applicable Documents - The following documents apply to the specified equipment to the extent defined herein

1. National Electrical Code, NFPA 70-1981
2. American National Standards Institute (ANSI)
3. NEMA Publications Number PB-1 and MG-1
4. IEEE Standards 45
5. Occupational Safety & Health Act (OSHA)
6. Local Codes & Authorities having jurisdiction for this installation

D. Related Work - The IMG shall be installed in accordance with the manufacturer's recommendations

E. System Description

1. The industrial motor-generator set and associated controls shall provide a means of electro mechanically isolating and filtering disturbances in the AC power source from the protected load.
2. Definitions
   1. Synchronous-Induction or synchronous-synchronous Motor-Generator (M-G) - The portion of the IMG system that shall generate new, clean AC true sinusoidal, phase or voltage relationship, regulated power to be supplied to the critical loads. The winding of the motor and generator shall be at least 23 cm (9") apart giving total isolation of input to output.
   2. Automatic Bypass Contactor - The portion of the IMG that shall automatically transfer the critical loads from the generator output to the AC input source without interruption in the event of degradation of the IMG performance. The automatic bypass shall be electromechanical type for complete isolation of power paths.
   3. Critical Loads - Those loads that require regulated, clean AC power continuously and which are connected to the IMG.
   4. The IMG shall be a single system rated to supply the full load as specified herein.

F. System Operation

1. Normal - AC line power shall be supplied continuously to the IMG. The generator output shall be connected to the critical load. The generator output shall also be synchronized with the alternate AC power source provided that the alternate AC power source is within the specified voltage and frequency range.
2. During brief disturbances of normal AC input source - The IMG shall supply AC power to the critical load.
3. Return of Normal AC Power Source - The IMG shall continue to AC power to the critical load when the normal AC power source returns. This shall be an automatic function and shall cause no disturbance to the critical loads.
4. Transfer to Alternate Source - If the IMG senses a fault or out-of-tolerance condition a shut down signal shall automatically transfer the critical loads from the generator output to the alternate AC power source without an interruption of power. If the alternate AC power source is outside normal limits, then the transfer shall be inhibited.

G. Quality Assurance - The manufacturer shall have a quality assurance program with inspection of incoming parts, modular assemblies, and final products. A final test procedure for the product shall include a check of all performance specifications and a minimum "burn in" period. An on-site test procedure shall include a check of controls and indicators after installation of the equipment.

H. Submittals

1. With Proposal - Catalog cuts and/or data sheets describing the proposed equipment shall be submitted with the proposal. A users listing shall be available giving company names locations and systems installed. All deviations from this specification shall be listed and included with the proposal.
2. After Receipt of Order - A minimum of two sets of installation drawings showing outline dimensions, weights, connections and a one-line diagram of the IMG shall be sent to the purchaser to be used in planning the installation of the system.
3. After Construction of Equipment
4. Two copies of drawings shall be furnished of the following.
   1. Equipment Installation Outline
   2. Connection Diagram for External Cabling
   3. Equipment Internal Wiring Diagram
5. Two instruction manuals shall be furnished and shall include, as a minimum, the following.
1. Installation Procedures
2. Operation Procedures
3. Troubleshooting Instructions
4. List of Recommended Spare Parts
6. One copy of the final test report shall be furnished with the equipment.

I. Delivery, Storage & Handling - The equipment shall be shipped on a wooden pallet suitable for forklift handling. The equipment shall be covered with clear plastic sheeting to prevent dust and dirt from entering the cabinet during shipment and storage.

J. Site Conditions - The equipment shall be suitable for installation indoors (altitude 0 to 12,000 meters or 0 to 4,000 feet) with ambient temperatures from -20° to +40°C (-20°F to +104°F) with 1% derating for each 1°C above 40°C up to 50°C, and relative humidity from 0% - 95% non-condensing.

K. Warranty - The manufacturer shall state his warranty of the equipment. In no case shall it be less than 12 months after start-up or 18 months after shipment, whichever occurs first.

PRODUCT

1. Electrical Characteristics
   1. IMG Input
      1. System size - up to 2500kVA
      2. Voltage/Frequency: 208, 480 or 600 VAC at 60Hz, 380 at 50Hz.
      3. Voltage Range: +15 to -30% of Nominal
      4. Voltage Transient Impulse: to 1500V for not more than 1 millisecond.
      5. Starting Inrush: 3 x nominal input amperage
      6. Ride-Thru: 5 to 8 cycles (40 to 100 milliseconds) for most disturbances.
   2. IMG Output
      1. Voltage/Frequency: 208, 480 or 600vac at 60Hz, 380 or 415vac at 50Hz
      2. Voltage Regulation
         1. Steady State: 0.5% of nominal output
         2. 25% unbalanced: 3.0%
      3. Recovery Time: 0.5 seconds
      4. Voltage Adjustment: 10%
      5. Frequency: 60Hz Standard, 50Hz Optional
      6. Transient Voltage Regulation with 50 step load: ±8%
      7. Power Factor: 0.8 lagging
      8. Harmonics
         1. Total: 5%RMS
         2. Single: 3%RMS
      9. Phase Separation
         1. Balanced Load: 120° ± 1°
         2. Unbalanced Load: 120° ± 3°
      10. Overload Capacity:
          1. 110% of full rated load for 2 hours
          2. 25% of full rated load for 10 minutes
          3. 150% of full rated load for 1 minute
2. Environmental
   1. Ambient: 0° to 40°C (0° to 104°F) with 50°C optional (121°F)
   2. Humidity: 0% to 95% non-condensing
   3. Audible noise: 90dBA open (75dBA with optional enclosure)
   4. Construction: Suitable for interior use
   5. Bearings: Grease lubricated, anti-friction type
   6. Service factor: Continuous duty, 24-hour service
   7. Speed: 1800rpm for 60Hz
3. Physical Description- The IMG set shall consist of the following elements:
   1. Brushless, two bearing induction motor
   2. Reduced current motor starter
   3. Motor Controls
   4. Motor input circuit interrupter
   5. Brushless, two-bearing synchronous generator with paralleling capability.
   6. Brushless direct connected AC exciter with rotating rectifiers.
   7. Bolted steel coupling between motor and generator adjustable to match input and output phases.
   8. Generator Controls
   9. Generator output circuit breaker
   10. Common mounting steel base with spring type vibration isolators.
4. Controls - The IMG set shall be equipped with the following controls:
   1. Motor Control: START switch at the IMG set that activates the reduced current motor starter.
   2. Motor Starter: Reduced current motor starting shall be accomplished by the following method: The IMG set shall be equipped with a wye delta starter that reduces the starting inrush. Consult factory for amount, depends on system specification.
   3. Instruments: Metering (2% accuracy) shall be provided to monitor the following conditions:
      1. AC input voltmeter - Each line voltage with selector switch
      2. AC input current - Each phase with selector switch
      3. AC output voltage - Each line-to-line voltage with selector switch.
      4. AC output current - Each phase with selector switch
   4. Voltage Adjustment Range: Output voltage control shall provide up to a ±10% adjustment range from nominal.
   5. Fault Detectors: The IMG set shall be equipped with protective devices which shut the unit down and activate internal latched indicators. These indicators shall retain the fault indication after the IMG set has stopped to simplify troubleshooting:
      1. Output over-voltage/under-voltage
      2. Starter overload
      3. Output under-frequency - shutdown only
      4. Motor overload
      5. Motor over-temperature
      6. Motor and generator bearing over-temperature
   6. Status Lights - Indicator lights shall indicate the following conditions
      1. Motor On
      2. Load On
      3. System Bypass
      4. System Fault
   7. Uninterrupted Bypass: The internal bypass will transfer the critical load from the IMG set back to the utility without interruption. The bypass can be initiated either manually by a switch or automatically by the standard fault detectors listed above. There will be no more than ±8% voltage transient during bypass.
   8. Cycle-On-Line: The IMG system will be capable of operating the critical load equipment directly on the utility, starting the IMG-RT set, synchronizing the IMG with utility and transferring the critical load to the IMG without interrupting the operation of critical load equipment. The starting sequence will be automatic after initiation by the start switch. The cycle-on-line sequence will be automatic after closing the generator circuit breaker. The transition shall be without interruption of the critical load.
   9. E.P.O.: This feature provides for the interface of the customer supplied "Emergency Power Off" via a set of switchable normally closed/normally open dry contacts.
   10. Controls: The controls of the motor and generator shall be mounted in separate floor standing cabinets
   11. Power Outage Protector: The IMG set shall be equipped with protector circuits, and, in the event of a sustained power outage, the output breaker will be tripped when the output frequency decays to a preset level. Furthermore, the motor shall be protected from return of utility power before the IMG has coasted to a stop.

OPTIONAL FEATURES AVAILABLE

1. Remote Monitor: System package has a separate alarm panel that includes the following monitoring and alarm functions.
   1. Load On
   2. System Bypass
   3. System Fault
   4. Audible Alarm (sounds when any of the above fault conditions occur)
2. Exhaust Silencer: The IMG set will be equipped with a sound attenuation device to reduce exhaust noise emission to less than 78dBa at 2M (78.7"). The device will be an integral part of the MG assembly.

CONSTRUCTION

1. Quality: All materials, parts, and components used will be new and of high grade.
2. The total system will be exposed to a functional and load test and will be subject to a factory full load test prior to shipment. Tests conducted at 1.0 PF.
3. Maintainability: No regular maintenance service operations are required at less than one-year intervals. At installations where unusual concentrations of moisture, vapors, dust and other particles may impinge upon windings, maintenance may be done at more frequent intervals, but without shutdown.
4. Warranty: The IMG set shall be warranted to be free from defects in design, material and workmanship for a period of either 12 months after installation or 18 months after shipment, whichever comes first.

EXECUTION

1. Manufacturing
   1. The manufacturer shall design, build, test and arrange for shipment of the IMG.
   2. The manufacturer shall prepare and deliver the required drawings and instruction manuals with the equipment.
2. Site Preparation - The owner shall prepare the site for installation of the equipment.
   1. The owner shall arrange for local electricians to install the equipment.
   2. The equipment shall be installed in accordance with local codes and the manufacturer's recommendations.
3. Field Start-up and Inspection - The equipment is to be checked out and started by the field service representative from the equipment manufacturer.
4. Spares - A list of manufacturer's recommended spare parts shall be submitted with the manuals.