Uninterruptible Power Systems Static (UPS)

NL Master Specification Guide

for Public Funded Buildings

Issued 2017/05/31Section 26 33 53 – Uninterruptible Power Systems Static (UPS) Page 1 of 10

Part 1GENERAL

1.1RELATED SECTIONS

.1Section 01 33 00 – Submittal Procedures.

.2Section 01 78 00 – Closeout Submittals.

.3Section 01 91 13 – General Commissioning (Cx) Requirements.

.4Section 26 05 00 – Common Work Results - Electrical.

1.2DESCRIPTION OF SYSTEM

.1System to consist of:

.1Rectifier

.2Invertor

.3Battery

.4Bypass switch cubicle

.5Microprocessor controlled logic and control panel.

.6Input and output filters.

.7Chopper

.8Load side isolation transformer

.2System to use normal power supply mains and battery to provide continuous, regulated ac power to isolated load.

.3Equipment to operate continuously and unattended.

.4Ensure that UPS is compatible with equipment that it feeds.

1.3SUBMITTALS

.1Include:

.1Outline sketch showing arrangement of cubicles, meters, controls, recommended aisle spaces, battery rack, battery arrangement and dimensions.

.2Shipping weight

.3Schematic diagram showing interconnection of rectifier, inverter, battery, bypass switch, meters, controls and indicating lamps.

.4Description of system operation, referenced to schematic diagram, for:

.1Manual control during initial startup and load transfer to bypass and back to inverter output.

.2Inverter

.3Bypass

.5System performance and reliability:

.1Consider any deviation from the required output power waveform as a failure in the UPS and include an estimate, with supporting calculations, of the Mean Time Between Failures (MTBF) expressed in hours.

.2Provide an estimate with supporting data for the Mean Time to Repair factor (MTTR).

.6Full load kVA output at unity power factor.

.7Efficiency of system at 25%, 50%, 75% and 100% rated load.

.8Type of ventilation: natural or forced.

.9Battery:

.1Number of cells

.2Maximum and minimum voltages

.3Type of battery

.4Type of plates

.5Catalogue data with cell trade name and type

.6Size and weight of each cell

.7Derating factor for specified temperature range.

.8Nominal ampere hour capacity of each cell.

.9Maximum short circuit current

.10Maximum charging current expected for fully discharged condition.

.11Recommended low voltage limit for fully discharged condition.

.12Expected life.

.10Inverter:

.1Type and catalogue number.

.2dc current at minimum battery voltage to produce full load ac output.

.11Rectifier:

.1Type and capacity, with catalogue number

.2Battery charging sequence

.3Guaranteed noise level.

.4Estimated life.

.5Metering

.6Alarms

.12Heat losses at no load, 25%, 50%, 75% and 100% of rated output, in kW.

.13Cooling air required in m3/s.

.14Spare parts, tools and instruments to perform system maintenance.

1.4SOURCE QUALITY CONTROL

.1Provide manufacturer’s field experience with uninterruptible power systems of similar ratings including engineering expertise manufacturing facilities and listing of UPS units manufactured and installed during the last 5 years including model, customer, location and installation dates.

1.5OPERATION AND MAINTENANCE DATA

.1Provide data for incorporation into operation and maintenance manual specified in Section 01 78 00 – Closeout Submittals.

.2Submit final O&M manual. Final manual approved by Owner’s Representative. Submit copies to Owner’s Representative prior to notification of test dates.

.3Operation and Maintenance Manual to include:

.1Operation and maintenance instructions concerning design elements, construction features, component functions and maintenance requirements to permit effective operations maintenance and repair.

.2Technical data:

.1Approved shop drawings 420 x 590 mm in size.

.2Characteristic curves for automatic circuit breakers and protective devices.

.3Project data

.4Technical description of components.

.5Parts lists with names and addresses of suppliers.

1.6MAINTENANCE MATERIALS

.1Provide maintenance materials in accordance with Section 01 78 00 – Closeout Submittals.

.2Include:

.1Four sets of each type and size of fuses used.

.2Four sets indicating lamps.

1.7DELIVERY AND STORAGE

.1Crating:

.1Adequately enclosed and protected from weather and shipping damage by use of minimum 12 mm plywood with vapour barrier inside.

.2For tractor train or sea shipment use double layer of vapour barrier and 19 mm plywood covering.

.3Subassemblies may be packed separately.

.4Label crates:

.1Shipping address.

.2Weight and dimensions

.3Serial number of unit and brief description of contents.

.4Stenciled with durable paint on at least two sides of each crate.

.5List of contents:

.1In weatherproof envelope stapled on outside of each crate.

.2Copy placed inside each crate.

1.8SERVICEABILITY

.1Successful bidder shall be required to have a permanent local authorized service representative for UPS systems on the island portion of the province.

1.9WARRANTY

.1Provide full 3-year, on-site product warranty from manufacturer guaranteeing the UPS system and battery against defects in operation, material and workmanship from date of Substantial Completion. Include parts and labour with warranty.

1.10TRAINING

.1Arrange and pay for on-site lectures and demonstrations by system manufacturer to train designated personnel in the use and maintenance of the system.

Part 2PRODUCTS

2.1UNINTERRUPTIBLE POWER SYSTEM

.1Input power:

.1Single phase 120 V, 2 wire, plus ground, 60 Hz.

.2Normal supply from ac mains.

.3Emergency supply from unit batteries.

.4Input total harmonic current distortion: less than 5% .

.5Input power factor: greater than 95%.

.2Output power:

.1Single phase 120V, 2 wire, plus ground, 60 Hz.

.2Full load output at 0.8 power factor lagging 1.0 kVA.

.3Overload capability: 125% of rated full load current at 0.8 power factor and rated voltage for 10 min; 1000% for 1 cycle.

.4Frequency nominal 60 Hz:

.1Maximum variation from set value under load changes, including transients, not to exceed + 0.5% Hz.

.2Drift from set value after two months normal operation within ambient temperature range of 0 to 40C, not to exceed + 0.5% Hz.

.5Duration of full load output after mains failure not less than 10 min.

.6Output voltage control:

.1Voltage regulation: voltage not to change by more than 3% as load increases gradually from zero to 100%, or for specified duration of full load after mains failure.

.2Transient voltage change not to exceed +/10% of rated voltage upon 50% sudden load change, loss or return of ac input voltage to system when fully loaded or transfer of full load from inverter to bypass and vice versa, and return to normal within 3 Hz.

.3Harmonics over entire load range:

.1Total harmonic distortion (THD): 1% typical, 3% maximum under linear load.

.2Single harmonic not to exceed 3% of total output voltage.

.7Efficiency: Overall system efficiency at rated load with battery fully charged not less than 85%.

.8Isolation transformer on output with secondary neutral bonded to ground.

.9True on-line design.

.10UPS battery and power conditioner in one enclosure suitable for desk top mounting.

2.2SYSTEM PERFORMANCE

.1Normal operation:

.1System operates on mains power when mains voltage is within +10% and -30% of nominal value and mains frequency is between 45 and 65 Hz.

.2Battery operation:

.1System transfers automatically to battery operation.

.1When manually selected at control panel.

.2When mains power fails.

.3When mains voltage varies more than +10% and -25% from nominal or mains frequency varies more than 5 Hz from 60 Hz.

.4When mains power is restored system automatically resynchronizes with mains.

.5Slew rate of frequency during transition period of system output automatically synchronizing with mains and return to its internal frequency.

.3Bypass operation:

.1For maintenance purposes, system can be bypassed automatically by manual selection at control panel to connect load directly to ac mains. Transfer without load interruption and leaving inverter energized.

.2Load transfer from mains back to system automatically by manual selection at control panel when maintenance completed.

.3Automatic transfer of load to mains in not more than 1/4 cycle including sensing with inverter left energized but disconnected from load in case of:

.1Inverter overloaded.

.2Short circuit in load.

.4Automatic retransfer of load to system without load interruption when above conditions disappear.

.5Automatic transfer of load to mains in not more than 1/4 cycle including sensing and shutdown of inverter in case of inverter internal malfunctions.

.6Automatic transfer of load to mains without load interruption and inverter shutdown in case of:

.1Overtemperature harmful to system.

.2Loss of forced ventilation.

.3Low voltage of dc supply to inverter.

.7Bypass capable of closing onto and withstanding momentary fault current of 800% of rating for 0.01 s.

2.3SYSTEM PROTECTION

.1Automatic circuit breakers and protection included in:

.1AC input to rectifier

.2Battery input

.3Bypass circuit input

.4Inverter output

.2Power conditioning by M.O.V.'s, line filters and isolation transformer:

.1To protect system against supply voltage switching transients.

.2To protect internal circuits where necessary against voltage transients.

.3Failure of circuit or component not to cause equipment to operate in dangerous or uncontrolled mode.

2.4ENCLOSURE

.1Dead front free standing sheet steel minimum 2.5 mm thick, CSA Enclosure 1.

.2Access preferably from front and rear.

.3Meters, indicating lamps and controls group mounted in panel front.

.4Panel front enclosed by hinged doors to prevent tampering and to protect instruments and controls during shipping.

.5Leveling feet.

.6Ambient temperature range during operation 0C to +40C. Natural or forced ventilation as required. For forced ventilation power from inverter output and fan directly driven by single phase motor mounted on vibration isolators. Each enclosure to have redundant fans, with fan failures alarmed. Air inlet and outlet openings protected with screens and metal guards.

.7Disposable air filters on fan cooled enclosures. Method of attachment and opening locations to make removal convenient and safe.

.8Maximum operating sound level not to exceed 45 db(A) as measured on sound level meter with A weighing and slow response, at a distance of 1.0 m.

2.5RECTIFIER

.1Input power supply from:

.1AC mains

.2Power conditioner: to protect equipment from supply voltage switching transients.

.3Rectifier:

.1Diode-bridge rectifier assembly.

.4Filter: for rectifier DC output.

.5Breaker: to protect DC output

.6Performance of rectifier:

.1Automatically maintain battery in fully charged state while mains power available, and maintain dc float voltage within +/1% of setting, no load to full load, during mains voltage variations up to +/10%.

.2Battery charging rate such that after battery has provided full load power output for specified duration, charger returns battery to 90% of fully charged state in 10 h.

2.6INVERTER

.1Input power supply from:

.1Rectifier DC output

.2Battery DC output

.2Input filter: with computer grade power conditioning to eliminate inverter source noise and restrictions on input cable length.

.3Power stage: high frequency switching insulated-gate bipolar transistors (IGBT).

2.7BATTERY

.1Battery type: Maintenance free, sealed lead acid, 8 year design life.

.2Back-up: 10 mins. full load, 30 mins. half load.

.3Discharge current to supply Invertor at full load output for 10 min.

2.8STATIC BYPASS SWITCH

.1Solid state closed circuit automatic transfer switches from bypass to UPS and from UPS to bypass without power interruption.

.2High speed automatic transfer from normal voltage to alternate source when:

.1Normal source voltage lost: transfer time and sensing 1/4 cycle.

.2Normal source: undervoltage at 80% of nominal value adjustable.

.3Normal source: overvoltage at 110% of nominal value.

.4Loss of normal source static switch continuity.

.3Return to normal source:

.1When normal source remains within return voltage limits of 95% to 110% of nominal value for approximately 1 s timing interval, circuit checks voltage balance and phase synchronization, then initiates return with zero switching time.

.4Switch status indication.

.5Accessories:

.1Manual bypass switch for maintenance and testing without load disturbance.

.2Continuity monitor: automatic transfer to alternate source in event of static switch discontinuity.

2.9OPERATING DEVICES

.1Panel:

.1Panel for complete monitoring control of UPS:

.1Operation panel features:

.1Run/Stop key switch

.2Emergency Power Off pushbutton

.3AC input voltage indicator

.4Battery status indicator

.5Invertor indicator

.6Bypass indicator

.7Fault indicator

.8Liquid Crystal Display (LCD)

.2Menu driven LCD that displays operating conditions, warning messages, and fault indication messages for the unit.

.1Operating conditions display:

.1Input voltage

.2Output voltage

.3Input frequency

.4Output frequency

.5Output current

.6Battery voltage

.7Battery test results

.8Output voltage adjustment

.9Number of battery discharges

.10Number of faults

.11UPS ON/OFF Line

.2Warning messages:

.1Overload

.2Current limit

.3Emergency power off

.4Battery discharge

.5I/O not synchronized

.6Autoretransfer mode

.7Battery Low

.8Input undervoltage

.9Input overvoltage

.10Battery not good

.3Fault messages:

.1DC undervoltage

.2DC over current

.3DC overvoltage

.4Main EEPROM error

.5Overheat

.6UPS overload

.7Inverter undervoltage

.8Inverter overvoltage.

2.10FINISHES

.1Cubicles:

.1Inside finish: white

.2Exterior finish: manufacturers standard colour

.3Exterior hardware and trim: corrosion resistant and not requiring painting such as stainless steel or aluminum.

2.11FABRICATION

.1Shop assemble all system components/units

.2Interconnect units and controls to produce complete uninterruptible power system.

Part 3EXECUTION

3.1INSTALLATION

.1Mount uninterrupted power system (UPS).

.2Ensure adequate clearance around UPS for ventilation.

.3Install UPS in level upright position.

.4Remove shipping supports only after UPS is installed and just before putting into service.

.5Loosen isolation pad bolts until no compression is visible.

.6Make primary and secondary connections in accordance with wiring diagram.

.7Energize UPS after installation is complete.

.8Instruct operating personnel in the care, operation and maintenance of the unit in accordance with Section 01 91 13 – General Commissioning (Cx) Requirements.

3.2field Quality Control

.1perform tests in accordance with Section 26 05 00 – Common Work Results - Electrical and Section 01 91 13 – General Commissioning (Cx) Requirements.

END OF SECTION