Energy Meter Spec 020910.doc

Energy Meters February 9, 2010

SECTION 020910 - ENERGY METER (Electric, Gas, BTU Meter, Water)

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following for monitoring of electrical power system:

1. Electrical power monitoring meter

2. Gas totalization monitoring meter

3. BTU energy meter

4. Water meter

5. Communication interface to Building Automation System.

B. The electrical meters will be used for gathering electrical information and energy and water usage. The gas meters will be used for gathering natural gas consumption. The BTU energy meters will be used for gathering thermal energy usage in water loops. The meters shall all be integrated with and monitored through the Building Automation System (BAS).

1.2 DEFINITIONS

A. Ethernet: Local area network based on IEEE 802.3 standards.

B. Firmware: Software (programs or data) that has been written onto read-only memory (ROM). Firmware is a combination of software and hardware. Storage media with ROMs that have data or programs recorded on them are firmware.

C. HTML: Hypertext markup language.

D. I/O: Input/output.

E. KB: Short for kilobyte. When used to describe data storage, "KB" represents 1024 bytes.

F. KY Pulse: A term used by the metering industry to describe a method of measuring consumption of electricity that is based on a relay changing status in response to the rotation of the disk in the meter.

G. LAN: Local area network; sometimes plural as "LANs."

H. BACnet: Building automation and controls network, a communication protocol for building automation and control networks.

I. LCD: Liquid crystal display.

J. Low Voltage: As defined in NFPA70 for circuits and equipment operating at less that 50V or remote-control, signaling and power-limited circuits.

K. Modbus TCP/IP: An open protocol (de facto industry standard) for exchange of process data based on a request/reply format using industry established data units.

L. Monitoring: Acquisition, processing, communication, and display of equipment status data, metered electrical parameter values, power quality evaluation data, event and alarm signals, tabulated reports, and event logs.

M. PC: Personal computer; sometimes plural as "PCs."

N. rms: Root-mean-square value of alternating voltage, which is the square root of the mean value of the square of the voltage values during a complete cycle.

O. RS-232: A TIA standard for asynchronous serial data communications between terminal devices.

P. RS-485: A TIA standard for multipoint communications using two twisted-pairs.

Q. TCP/IP: Transport control protocol/Internet protocol incorporated into Microsoft Windows.

R. THD: Total harmonic distortion.

S. UPS: Uninterruptible power supply; used both in singular and plural context.

T. WAN: Wide area network.

1.3 SUBMITTALS

A. Product data sheet.

B. Installation manual

1.4 QUALITY ASSURANCE

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, Article100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

B. Steel Support Welding Qualifications: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel."

C. Pipe Welding Qualifications: Qualify procedures and operators according to ASME Boiler and Pressure Vessel Code.

D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Suggested Manufacturers:

1. Electric Meter: Veris Industries

2. Gas Meter: Miners & Pisani, Onicon. Sage Metering, Fox Thermal Instruments

3. BTU Meter: Onicon

2.2 SYSTEM REQUIREMENTS

A. Surge Protection: For external wiring of each conductor entry connection to components to protect components from voltage surges originating external to equipment housing and entering through power, communication, signal, control, or sensing leads.

1. Minimum Protection for Power Lines 120 V and More:

2. Minimum Protection for Communication, Signal, Control, and Low-Voltage Power Lines: Comply with requirements as recommended by manufacturer for type of line being protected.

B. BAS Interface: Provide factory-installed hardware and software to enable the BAS to monitor, display, and record data.

1. Communication with pulse inputs is for totalization reading.

2. Communication via 4-20mA or 0-10V is acceptable for instantaneous readings.

2.3 METER REQUIREMENTS

A. Electric Meter Basic Requirements:

1. The Energy Meter shall consist of digital electronic circuitry

2. The Energy Meter shall conform to ANSI C12.1 metering accuracy standards.

3. The Energy Meter system shall consist of a meter and included CT(s) calibrated together as a system.

4. The Energy Meter’s system accuracy shall be +/- 1% from 2 % to 100 % of the rated current over a temperature range of 0-50° C.

5. The Energy Meter shall require no annual recalibration by users in the field.

6. The Energy Meter electronics shall automatically correct for CT phase reversal.

7. The Energy Meter CTs shall be factory assembled.

8. The Energy Meter shall have a backlit LCD display measuring 1.2” X 3.8” that is direct read without the need for multipliers.

9. The Energy Meter LCD display shall show accumulated kWh on the top half of the display while the bottom half of the display scrolls through Amps, Voltage, PF, KVAR, KVA, KW Real Power, as stated in point Q below.

10. The Energy Meter shall meet UL and cUL specifications as listed in 3111-1.

11. The Energy Meter shall directly accept any voltage input from 120-480 VAC.

12. The Energy Meter shall be internally isolated to 2500 VAC.

13. The information and capabilities provided by the Energy Meter shall include the following:

a. Current, per phase & three-phase total

b. Voltage, per phase & three-phase total, phase-to-phase & phase-neutral

c. Real Power (kW), per phase & three-phase total

d. Reactive Power (kVAR), three phase total

e. Apparent Power (kVA), three phase total

f. Power Factor, per-phase & three-phase total

g. Real Energy (kWh), three phase total

B. BTU Meter Basic Requirements:

1. Calibration: Flow meter and temperature sensor are individually calibrated, followed by a complete system calibration. If a complete system calibration is not performed at factory, field commissioning is required.

2. Accuracy: Differential temperature accuracy plus or minus 0.15 deg F over the calibrated range. Flow +/- 2% across the calibrated range.

3. Programming: Factory programming for specific application, field programmable via front panel interface.

4. Memory: Meter shall have non-volatile EEPROM memory retains all program parameters and totalized values in an event of power losss.

5. Display: Alphanumeric LCD display total energy, total flow, energy rate, supply temperature and return temperature

6. Output signals: (4-20 mA, 0-10 V or 0-5 V) one or four output(s) available for flow rate, energy rate, supply/return temperature or delta T.

7. Serial communications: BACnet MS/TP

8. Liquid flow signal input: 0-15 V pulse output from flow meter.

9. Temperature Sensors: Solid state sensors custom calibrated using N.I.S.T traceable temperature standard.

10. Temperature range: Liquid temperature range (32 deg F to 200 deg F), ambient temperature range (40 deg F to 120 deg F)

11. Mechanical: Enclosures (Steel NEMA 13, wall mount)

12. Electrical: Input power, Standard 24 VAC 20/60 Hz, 500 mA

13. Internal supply: Provides 24 VDC at 200 mA to electronics and flow meter.

14. Wiring: Temperature signals use 18-22 ga twisted shielded pair, flow signal use 18-22 ga

15. Interface with Building Automation System

C. Water Meter Basic Requirements:

1. Flowmeters: Sensor: Impeller turbine or paddle wheel; for inserting into pipe fitting or for installing in piping and measuring flow directly in gallons per minute.

2. Minimum Pressure Rating: 200 psig.

3. Minimum Temperature Rating: 180 degF

4. Display: Shows instantaneous rate of flow

5. Display: includes register to indicate total volume in gallons.

6. Interface with Building Automation System

D. Environmental Conditions: System components shall be capable of withstanding the following environmental conditions without mechanical or electrical damage or degradation of operating capability:

1. Temperature range 32 to 122 deg F (0 to plus 50 deg C) dry bulb and < 95 percent relative humidity, non-condensing.

E. Accuracy:

1. Electric Meter accuracy: +/- 1% of reading from 2% to 100% of the rated current of the CTs, accomplished by matching the CTs with a meter and calibrating as a system.

2. Gas meter accuracy: +/-2% of reading across full range

3. BTU meter accuracy: +/-2% of reading across full range

4. Water Meter: +/-3% of reading across full range

2.4 WARRANTY

A. Provide manufacturer’s standard warranty.

END OF SECTION 260910