SECTION 16901

ELECTRICAL SENSING AND MEASUREMENT

PART 1 GENERAL

SECTION INCLUDES

Instrument transformers.

Meters and meter switches and relays.

Protective relays.

Transducers.

RELATED SECTIONS

Section 16425 - Switchboards: Switchboard metering.

REFERENCES

ANSI C12 - Code for Electricity Metering.

ANSI C39.1 - Requirements for Electrical Analog Indicating Instruments.

ANSI C57.13 - Requirements for Instrument Transformers.

SUBMITTALS

Submit under provisions of Section [01300.] [01340.]

Product Data: Include electrical ratings, adjustment ranges, enclosure type, outline dimensions, mounting dimensions, and terminal connection information for each device.

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

OPERATION AND MAINTENANCE DATA

Submit operation and maintenance data under provisions of Section [01700.] [01730.]

Include adjustments, repair instructions, and spare parts list.

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Model [_____________.]

[______________________________] Model [_____________.]

[______________________________] Model [_____________.]

Substitutions: Under provisions of Section [01600.] [01630.]

INSTRUMENTS AND SENSORS

Ammeters: ANSI C39.1; indicating ammeter with [3.5] [4.5] inch ([90] [115] mm) square recessed case and 250 degree scale, [white] [_____] dial with [black] [_____] figures and pointer, 5 ampere, 60 Hertz movement, one percent accuracy.

Voltmeters: ANSI C39.1; indicating voltmeter with [3.5] [4.5] inch ([90] [115] mm) square recessed case and 250 degree scale, [white] [_____] dial with [black] [_____] figures and pointer, 120 volt, 60 Hertz movement, one percent accuracy.

Ammeter Transfer Switch: Rotary multistage snap-action type with 600 volt AC-DC silver plated contacts, engraved escutcheon plate, [pistol-grip] [oval type] handle, and four positions including OFF.

Voltmeter Transfer Switch: Rotary multistate snap-action type with 600 volt AC-DC silver plated contacts, engraved escutcheon plate, [pistol-grip] [oval type] handle, and [four] [seven] positions including OFF.

Watt-hour Meters and Wattmeters: ANSI C12; three phase induction type with two stators, each with current and potential coil, rated 5 amperes and 120 volts at 60 Hertz. Provide meter suitable for connection to 3- and 4-wire circuits and include potential indicating lamps; adjustments for light and full load, phase balance, and power factor; four-dial clock register; [integral demand indicator] [impulse contact devices to operate remote impulse-totalizing demand meter]; ratchets to prevent reverse rotation; removable meter with draw-out test plug; semi-flush mounted case with matching cover.

Impulse-Totalizing Demand Meter: ANSI C12; suitable for use with switchboard watt-hour meter, including two circuit totalizing relay; cyclometer; [four dial totalizing kilowatt-hour register;] positive chart drive mechanism; capillary pen holding minimum one-month ink supply; and a roll chart with minimum 31-day capacity. Indicate and record [five] [fifteen] [thirty ] minute integrated demand of the totalized system.

Current Transformers: ANSI C57.13; 5 ampere secondary, [wound] [bushing] [bar or window] type, with [single] [double] secondary winding and secondary shorting device, primary/secondary ratio as [required] [shown on Drawings], burden and accuracy consistent with connected metering and relay devices, 60 Hertz.

Potential Transformers: ANSI C57.13; 120 volt [single] [tapped] [double] secondary, disconnecting type with integral fuse mountings, primary/secondary ratio as [required] [shown on Drawing], burden and accuracy consistent with connected metering and relay devices, 60 Hertz.

PART 3 EXECUTION

INSTALLATION

Install in accordance with manufacturer's instructions.

END OF SECTION