Power Systems & Controls, Inc.

GUIDEFORM SPECIFICATION FOR SERIES GRF

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.

GOVERNMENT ROTARY FILTER

General

This specification is intended to provide installation information required for a model GRF motor-generator, maintenance bypass, and 380VAC isolation transformer based on assumptions detailed elsewhere in this specification.

Wherever possible the interconnections between the different devices furnished under this contract shall be factory installed to limit the scope and duration of the installation on site.

INSTALLATION

Installation services include unpacking, rigging and placement of one model GRF 380VAC input and output, isolation transformer, maintenance bypass switch, and prepackaged installation materials and tools at the installation location.

1. ELECTRICAL SCOPE - the overall electrical scope of work is as follows
1. Disconnect the existing electrical circuit now installed as the primary input to the critical load.
2. Install suitable junction box to allow the circuit to be re-routed to a three-switch manual maintenance bypass.
3. Furnish and install conduit and wire sized for a maximum of [64A for 12.5kVA, 265A for 25kVA, 440A for 50kVA} at 380VAC between the maintenance bypass and the GRF system input.
4. Furnish and install conduit and wire from the GRF system output to the M-G isolation switch located in the maintenance bypass.
5. Furnish and install conduit and wire from the maintenance bypass input switch to the [12.5, 25, 50] kVA isolation transformer, and from the transformer to the critical load bus in the maintenance bypass switch.
6. Furnish and install conduit and wire to connect the critical load bus in the maintenance bypass to the existing electrical input to the critical load.
2. INSTALLATION ASSUMPTIONS
1. Delivery from the port of entry to the job site and unloading is by others.
2. The physical route between the location where the crate containing the GRF will be unloaded and the equipment room where the GRF is to be installed is suitable for rolling the system into the room. i.e. no stairs or other obstacles requiring special rigging equipment.
3. The existing 3-phase electrical input circuit to the critical load is rated at amperage large enough to source the starting current needed by the GRF.
4. All electrical work will be performed with the confines of the equipment room where the GRF is to be installed.
5. The maximum circuit length will not exceed 4.5 meters (15 feet) per conduit run.
6. Transportation of all materials from the domestic delivery location to the job site is by other.
7. Return freight to Manufacturer of any tools or materials that it would not reasonable to transport as checked baggage is by others.
8. Prior to shipping any materials the equipment layout and electrical insulation plan is approved by the government.
9. The installation location will have and allow access to a pallet jack or forklift by Power Systems & Controls.
3. ISOLATION AND MAINTENANCE BYPASS SWITCH
The isolation and maintenance bypass will consist of one (1) molded case switch and two (2) 4-pole contactors mounted in a NEMA 1 enclosure. A separate 380:380 3-phase isolation transformer in a NEMA 1 enclosure will be installed in a manner such that the critical load will never be directly connected to the normal utility input. The switches serve the following functions;

1. GRF INPUT ISOLATION SWITCH The GRF input isolation switch will be the primary input to the GRF system. Opening this device will removed all electrical power from the GRF system for the purpose of conduction maintenance.
2. GRF OUTPUT ISOLATION SWITCH The GRF output isolation switch will provide the means of disconnecting the GRF system output form the GRF system.
3. MAINTENANCE BYPASS INPUT SWITCH The maintenance bypass input switch will be the alternate electrical input to the critical load. This device will be connected to the primary of the 380VAC isolation transformer whose purpose is to provide DC isolation to the critical load during periods of maintenance of the GRF system.
4. START-UP SERVICES
After acceptance of the installation Power Systems & Controls field engineers shall perform a complete system start-up, and conduct operator training on the operation of the GRF system and the associated isolation and maintenance system.

GRF DESCRIPTION

The M-G set and associated controls shall provide a means of electro-mechanically isolating, and filtering disturbances in the AC source from the electronic data processing system or other critical loads.

1. PHYSICAL DESCRIPTION: The M-G set shall consist of the following elements:
   1. Brushless, two bearing induction motor with brushless exciter.
   2. Reduced current motor start choke.
   3. Motor controls.
   4. Motor input molded case circuit (CB) breaker with shunt trip mechanism.
   5. Brushless, two bearing synchronous generator.
   6. Brushless, direct connected AC exciter with rotating rectifiers.
   7. Flexible gear style insulated coupling between motor and generator adjustable to match input and output phase positions.
   8. Generator controls.
   9. Generator output CB with shunt trip mechanism.
   10. Common mounting steel base with spring type vibration isolators.
   11. Single sound enclosure split into upper and lower sections.
   12. The mounting base shall be mechanically and electrically isolated from the lower section of the enclosure and electrically isolated from the motor and generator.
2. CONTROLS: The M-G set shall be equipped with the following controls. The controls of the M-G shall be mounted as a unit in the upper section of the split enclosure:
   1. EXTERNAL CONTROLS & INDICATORS The following are operator controls on the front panel accessible from outside the M-G enclosure.
   2. INSTRUMENTS: Metering (2% accuracy) shall be provided to monitor the following conditions.
      1. AC input voltmeter - each line-to-line voltage with selector switch*.
      2. AC input ammeter - each phase with selector switch*.
      3. AC output voltmeter - each line-to-line voltage with selector switch*.
      4. AC output ammeter - each phase with selector switch*.
      5. AC input frequency meter. * Common selector switch for these items.
   3. Voltage Adjustment Range: Output voltage control shall provide ±10% adjustment range from nominal.
   4. Fault Indicators: The M-G set shall be equipped with protective devices that shut the unit down or activate the bypass and internal latched indicators. These indicators shall retain the fault indication after the M-G set has stopped to simplify troubleshooting.
   1. Output Over voltage
   2. Output Under voltage
   3. Starter Overload
   4. Output Under frequency
   5. Motor Overload
   6. Enclosure Over temperature
   5. E.P.O. This feature provides for the interface of the customer supplied "Emergency Power Off" via a set of switchable normally closed dry contacts.
   6. Status Light: Indicator lights shall indicate the following conditions:
   1. Input CB Closed
   2. Run Contactor Closed
   3. Output CB Closed
3. INTERNAL CONTROLS & DETECTORS The following control and protection devices shall be found inside the M-G enclosure and not accessible from the outside.
1. Input Motor Circuit Protector (MCP): The M-G shall be equipped with an input motor circuit protector that is used to start the M-G set. Activating the reduced current motor starter does this. The MCP shall also automatically disable the M-G set after a system failure.
2. Motor Starter: The M-G set shall be equipped with a reduced current starter that reduces the starting inrush to less than three times the nameplate amperage.
3. Generator CB: The M-G set shall be equipped with an output CB. This is used to apply voltage to the load
4.  Motor Run Contactor: The M-G set shall be equipped with a contactor that applies full source voltage to the input transformer after the start sequence.
5. Power Outage Protector: The M-G 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 M-G has coasted to a stop.
6. Over voltage detector: The M-G set shall be equipped with an over voltage detector that will disconnect the load from the generator and shut the M-G set down if the magnitude of the generator voltage exceeds the upper limit.
7. Under voltage detector: The M-G set shall be equipped with an under voltage detector that will disconnect the load and shut the M-G set down if the magnitude of the generator voltage exceeds the lower limit.
8. Remote fault indicator: The M-G set shall be equipped with a relay with two sets of form C contacts that indicate a fault in the M-G set. These contacts are to be used for signaling purposes in a remote location.

ELECTRICAL CHARACTERISTICS:

1. INPUT:
1. Voltage: 380VAC, ±10%, 3-phase, 3-wire, wye
2. Frequency: 50Hz
3. Power Factor: 0.8 lagging
4. Ride-Through: Uninterrupted power for up to 500 milliseconds (ms) with most commonly experienced utility "outages"
5. Voltage Sag: to 60% of nominal input voltage not exceeding 30 seconds voltage Impulse to 1500 volts for not more than one millisecond brownout 15% continuously low input voltage.
2. OUTPUT:
1. Power: [12.5, 25, 50] kVA at 0.8 lagging power factor continuous duty, [10, 20, 40] kW
2. Voltage: 380/220VAC, 3-phase, 3-wire, wye
3. Frequency: Approx. 2.2% slip at rated load; 50Hz ±1.1Hz
4. Voltage Regulation: ±1%
5.  Transient Voltage Regulation:
   1. 25% Input Voltage Sag: ±8%
   2. Step Load (50%): ±8%
6. Harmonic Distortion: 5% max. RMS total, 3% max. single (linear load)
7. Phase Displacement: 120° + 1° balanced load; 120° + 3° for 25% unbalance
8.  Overload: 110% of nominal for 2 hours; 125% for 10 minutes, 150% of nominal for 1 minute

ENVIRONMENTAL CHARACTERISTICS:

1. Ambient Temperature: 0°C to 40°C (32°F to 104°F)
2.  Relative Humidity: 0 to 95% non-condensing
3. Altitude: 0 to 2400 meters (0 to 8,000 feet)
4. Construction: Suitable for interior use
5. Bearings: Grease lubricated, anti-friction type
6. Service Factor: Continuous duty, 24-hour service
7. Motor Speed: 1466RPM for 50Hz

TESTING:

1. The total system shall be exposed to a functional and load test and shall be subject to a factory full load "burn-in" test prior to shipment. As an option, the purchaser may witness the test of the equipment. Tests may be conducted 1.0 P.F. load.

MAINTAINABILITY:

1. No regular maintenance service operations will be required at less than one-year intervals. At installations where unusual concentrations of moisture, vapors, dust and other electrical components, periodic cleaning, such as with clean compressed air may be required at more frequent intervals, but without shutdown. Maintenance operations are to be fully described along with a recommended maintenance schedule and rates for vendor supplied maintenance contracts.

WARRANTIES:

1. The critical power buffer shall be warranted to be free from defects in design, material and workmanship, when operated under design conditions, for a period of one year from date of acceptance, or 14 months from date of shipment, whichever occurs first.

MANUALS:

1. Two copies of operating and parts manuals shall be supplied and shipped with the equipment.