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Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VII - Voltage Bandwidth and Voltage Distortion Requirements › Section PSC 113.0706 - Check of standards by commission

Current through June 24, 2024
(1) Each utility
				shall submit to a public service commission-approved calibration facility once
				each year a portable digital standard watthour meter and once each 2 years a
				portable digital indicating voltmeter or multimeter, unless waived by the
				commission under the provisions of s.
				PSC
				113.0902(1). Smaller Class C and D
				utilities, may be allowed to continue to use the older electromechanical
				portable watthour standard for a reasonable future time period, if so
				authorized by the commission.
Note:
The rapid movement to the newer
				  fully-electronic digital watthour standards by the measurement industry has
				  limited a laboratory's ability to get replacement parts needed to maintain and
				  calibrate the older electromechanical standards. All utilities have been
				  advised of the need to acquire electronic/digital standards when it is
				  reasonably feasible to replace the older obsolete electromechanical
				  standards.
(2) Each utility
				shall be equipped with or otherwise arrange to have available when needed,
				portable digital indicating and recording voltmeters having internal memory
				channels of an accuracy and quantity sufficient to make a determination that
				the service voltage supplied to their customers complies with the requirements
				set forth in ch. PSC 113. This instrument shall be maintained with an error no
				greater than 0.8 % of full scale.
Note:
(1) Caution should be exercised in using digital
				meters in areas of high electrical fields such as in close proximity to
				substations, high voltage lines, transformers, regulators, etc., as unstable or
				erroneous readings may result.
(2)
				Those utilities which operate standards laboratories will require primary or
				laboratory grade instruments of a higher accuracy class than required
				above.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VII - Voltage Bandwidth and Voltage Distortion Requirements › Section PSC 113.0707 - Radio and television interference

Current through June 24, 2024
(1) Each utility
				shall own or otherwise arrange to have available when needed, suitable
				monitoring equipment for surveying its lines and equipment for possible radio
				and/or television interference.
(2)
				Each utility shall establish and routinely utilize in the course of regular
				operation, means whereby the presence of radio and/or television interference
				may be detected.
(3) Each utility
				shall, upon notification or detection of the presence of radio and/or
				television interference, survey its lines and equipment for possible sources of
				radio and television interference. When significant interference is found,
				reasonable measures shall be taken to locate the source and, if on the
				utility's system, to mitigate the interference. Where the magnitude and nature
				of the interference is found to be so small, intermittent or insignificant that
				it affects only a few customers or a particular, unique piece of customer
				equipment that may have limited capabilities to receive weak signals, it may be
				necessary to limit the utility's responsibility for mitigation to reasonable,
				cost-effective measures.
Note:
In some cases, some interference from the
				  utility's system may be detected, but found to be insignificant and
				  inconsequential for the majority of customers. Its elimination or mitigation
				  may still not result in adequate reception of some signals. In many areas,
				  radio or television reception of some transmissions is normally inadequate due
				  to frequency, weak signal strength, high ambient noise, distance from the
				  source, terrain or other obstacles beyond the utility's control. The
				  capabilities and limitations of the customer's receiver should also be
				  evaluated and considered in determining the nature, extent and cost of the
				  utility's mitigation activities. Also, other options may be available and more
				  feasible, for example, applying the mitigation to the customer's equipment or
				  substitution of cable television (CATV) or digital satellite service for local
				  antenna systems.
(4) Where
				the source of interference is determined to be equipment owned by a specific
				customer, the customer shall be so advised and informed of his or her
				responsibility to correct the problem (see s.
				PSC
				113.0201 ).
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0801 - Measuring energy on system

Current through June 24, 2024
Where practical to do so, all electrical quantities required
				  to be reported to the commission shall be metered. Quantities may be calculated
				  when permitted by s.
				  PSC
				  113.0802.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0802 - Measuring customer service

Current through June 24, 2024
(1) Except as
				provided in sub. (2), all energy sold to customers shall be measured by
				commercially acceptable measuring devices owned and maintained by the utility.
				All other electrical quantities which the rates or utility's rules indicate are
				to be metered shall be metered by commercially acceptable instruments owned and
				maintained by the utility.
(2) For
				temporary or special installations where it is impractical to meter loads, such
				as certain highway or area lighting which may be billed at a flat rate based on
				lamp rating and use, the consumption may be calculated.
(3) The metering and wiring in nontransient,
				multi-dwelling-unit residential buildings, mobile home parks and commercial
				establishments where individual unit metering is provided, or required under
				the provisions of s.
				PSC
				113.0803, shall be so installed or arranged so that
				each customer or tenant is metered for his or her own consumption only. Energy
				used by common area loads, for example, hallway lighting and heating, shall be
				separately metered and billed as appropriate under the utility's filed
				tariff.
(4) Utilities shall inspect
				existing properties for jointly metered service where a tenant reasonably
				suspects that he or she is being billed for significant usage (e.g., furnace,
				water heater, etc.) that is serving more than one rental dwelling unit. The
				utility may bill the property owner for such an inspection. See s.
				196.643,
				Stats.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0803 - Individual electric meters required for non-transient multi-dwelling unit residential buildings, mobile home parks and for commercial establishments

Current through June 24, 2024
(1)
				Each dwelling in a multi-dwelling unit residential building and mobile home
				park constructed after March 1, 1980, shall have installed a separate electric
				meter for each such dwelling unit. Dwelling unit means a structure or that part
				of a structure which is used or intended to be used as a home, residence or a
				sleeping place by one or more persons maintaining a common household and shall
				exclude transient multi-dwelling buildings and mobile home parks: for example,
				hotels, motels, campgrounds, hospitals, community-based residential facilities,
				residential care apartment complexes or similar facilities, nursing homes,
				college dormitories, fraternities, and sororities.
(2) Each tenant space in a commercial
				building constructed after March 1, 1980 shall have installed a separate
				electric meter.
(3) Any existing
				building which undergoes alterations involving a change in type of occupancy or
				substantial remodeling shall have installed a separate electric meter for each
				separate tenant space.
(4) For the
				purpose of carrying out the provisions of sub. (1), individual unit metering
				will not be required:
(a) In commercial
				buildings where the commercial unit space requirements are subject to
				alteration, as evidenced by temporary versus permanent type of wall
				construction separating the commercial unit spaces. Examples of temporary wall
				construction are partition walls which do not extend through the ceiling and
				walls which do not constitute a code-required fire separation.
(b) For electricity used in central heating,
				ventilating and air conditioning systems.
(c) For electric back-up service to storage
				heating and cooling systems or when alternative renewable energy resources are
				utilized in connection with central heating ventilating and air conditioning
				systems.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0805 - Tamper-resistant equipment

Current through June 24, 2024
Where electrical energy has been diverted or the utility's
				  equipment for measuring the service or controlling a customer's load has been
				  interfered with, the utility may require the customer to install entrance and
				  service equipment to prevent current diversion or interference with the
				  metering or control equipment.
See s.
					 PSC
					 113.0808.
Care should be taken in determining the existence of
					 diversion and amount of energy diverted. In case check-meters are used, the
					 possibility of grounds between meters, normal meter inaccuracies and incorrect
					 connections of meters should not be over-looked. The requirements of the
					 Wisconsin state electrical code for entrances should effectively prevent such
					 diversion. Attention is directed to ss.
					 939.32 and
					 943.20,
					 Stats.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0806 - Multipliers and test constants

Current through June 24, 2024
(1) Meters which
				are not direct reading shall have the multiplier plainly marked on the dial of
				the instrument or otherwise suitably marked and all charts taken from recording
				meters shall be marked with the date of the record, the meter number, customer
				and chart multiplier.
(2) The
				register ratio shall be marked on all meter registers.
(3) The watthour constant for the meter
				itself shall be placed on each watthour meter.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0807 - Meter compensation

Current through June 24, 2024
(1) Metering equipment shall not be set
				"fast" or "slow" to compensate for supply transformer or line losses.
(2) Loss compensators designed to be used
				with meters and which accurately add iron losses, copper losses, or both may be
				used. The compensator shall carry a tag identifying the compensation and shall
				be tested when the associated meter is tested and when the associated supply
				equipment on lines are changed.
See s.
					 PSC
					 113.0917 which covers test requirements for
					 transformer loss compensators.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0808 - Sealing meters and service entrance equipment

Current through June 24, 2024
(1) Meters and
				metering equipment enclosures, which if open, would permit access to live parts
				from which energy could be used without proper measurement and utility-owned
				devices and equipment located on a customer's property for the control of his
				or her, load shall be sealed.
(2)
				Where the entrance switch is combined with meter-test facilities, or is
				installed on the supply side of the meter, the entrance switch boxes may be
				sealed by the utility. The customer may remove the seal from any fuse
				compartment to replace fuses if the utility is promptly notified that such seal
				has been broken.
(3) Where a
				utility supplies different classes of service at different rates to the same
				premises, such as lighting service and electric water heating service, the
				utility may seal the service switches.
(4) Sealing and resealing shall be without
				charge to the customer.
(5) This
				rule shall not require modernization of old installations or the sealing of
				installations which cannot practicably be sealed. Sealing shall not be such as
				to interfere with the operation of any switch or protective
				equipment.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0810 - Rental charge for metering equipment

Current through June 24, 2024
The utility may charge a rental for equipment installed to
				  furnish additional metering information to a customer for his or her use or
				  because of governmental requirements.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0811 - Accuracy of watthour meters

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) Watthour meters used
				for measuring electrical quantities supplied to customers shall:
(a) Be of proper design for the circuit on
				which they are used, be properly connected and installed, be in good mechanical
				condition, have adequate insulation, correct internal connections and correct
				register.
(b) Not creep at "no
				load" a full revolution of the disk in 10 minutes or less when the load wires
				are disconnected and potential is impressed or in a test in the shop where the
				load wires are disconnected and the permissible voltage variation impressed. If
				the rate of creep can be determined in a shorter interval, it is not necessary
				to wait the full 10-minute period.
(c) If the meters are designed for use on
				alternating current circuits, they shall be accurate to within plus or minus 1%
				at 2 load tests: one equal to between 8% and 12% of full reference test current
				at unity power factor and the other between 90% and 110% of full reference test
				current at unity power factor; and for polyphase meters, shall be accurate to
				within plus or minus 2% at between 75% and 100% full reference test current and
				approximately 50% lagging power factor. For self-contained meters the reference
				test current shall be the ampere or test ampere rating of the meter, whichever
				is shown on the nameplate. For meters used with current transformers the
				reference test current shall be the test-ampere rating of the meter or the
				secondary rating of the current transformers.
Note:
See s.
				  PSC
				  113.0926(2) for accuracy requirements
				  for meters operating in the reverse-registration mode.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0812 - Accuracy of demand meters

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) A demand meter, demand
				register, or demand attachment used to measure customer's service shall:
(a) Be in good mechanical and electrical
				condition.
(b) Have proper
				constants, indicating scale, contact device and resetting device.
(c) Not register at no load.
(d) Be accurate to the following degrees:
1. Curve drawing meters which record quantity
				time curves and integrated-demand meters shall be accurate to within plus or
				minus 2.0% of full scale throughout their working range. Timing elements
				measuring specific demand intervals shall be accurate to within plus or minus
				2.0% and the timing elements which serve to provide a record of the time of day
				when the demand occurs shall be accurate to within plus or minus 4 minutes in
				24 hours.
2. Lagged-demand meters
				shall be accurate to within plus or minus 4% of full scale at final
				indication.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0813 - Requirements for instrument transformers

Current through June 24, 2024
(1) Instrument
				transformers used in conjunction with metering equipment to measure customers'
				service shall:
(a) Be in proper mechanical
				condition and have electrical insulation satisfactory for the service
				used.
(b) Be 0.3% accuracy-class
				units and otherwise have characteristics such that the combined inaccuracies of
				all transformers supplying one or more meters in a given installation will not
				exceed the total accuracies for the following conditions:
1. Power factor equals 1.0 and 10% load,
				accuracy equals 0.6%.
2. Power
				factor equals 1.0 and 100% load, accuracy equals 0.3%.
3. Power factor equals 0.5 and 100% load,
				accuracy equals 1.0%.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0814 - Portable indicating instruments

Current through June 24, 2024
All portable indicating electrical instruments used for
				  determining quality of service to customers or for billing purposes, such as
				  voltmeters, ammeters and watt meters, shall be checked against suitable
				  secondary reference standards at least once in each 6 months. If the portable
				  indicating instrument is found appreciably in error at zero or in error by more
				  than 1% of indication at commonly used scale deflections, it shall be adjusted.
				  A history and calibration record shall be kept for each such
				  instrument.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0815 - Type of instruments

Current through June 24, 2024
All electric service of the same type rendered under the same
				  rate schedule shall be metered with instruments having like characteristics,
				  except that the commission may approve the use of instruments of different
				  types if their use does not result in unreasonable discrimination. Either all
				  of the reactive meters which may run backwards or none of the reactive meters
				  used for measuring reactive power under one schedule shall be
				  ratcheted.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0816 - Servicing utilization control equipment

Current through June 24, 2024
(1) Utilities shall
				service and maintain any equipment they use on customers' premises so as to
				provide service in accordance with the rate provisions.
(2) Systems and devices used by the utility
				to control customer metering and loads shall be tested or checked on
				installation and periodically thereafter, if necessary, to verify proper
				operation.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0817 - Metering at point of interchange and for customers' operating generating equipment

Current through June 24, 2024
(1) Metering facilities located at any point
				where energy may flow in either direction and where the quantities measured are
				used for billing purposes shall consist of meters equipped with ratchets or
				other devices to prevent reverse registration and be so connected as to
				separately meter energy flow in each direction. Reverse meter registration is
				permitted for installations with customer-owned generators served under a net
				billing energy rate through one meter in accordance with s.
				PSC
				113.0926.
(2) Reactive metering shall not be employed
				for determining average power factor where energy may flow in either direction
				or where the customer may generate an appreciable amount of his or her
				requirements at any time unless suitable directional relays and ratchets are
				installed to obtain correct registration under all conditions of operation and
				unless the general plan of installation is approved by the
				commission.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter VIII - General Customer Metering and Meter Accuracy › Section PSC 113.0818 - Determination of average meter error

Current through June 24, 2024
Whenever a metering installation is found upon any test to be
				  in error by more than 2% at any test load, the average error shall be
				  determined in one of the following ways:
(1) If the metering installation is used to
				measure a load which has practically constant characteristics, such as a
				street-lighting load, the meter shall be tested under similar conditions of
				load and the accuracy of the meter "as found" shall be considered as the
				average accuracy.
(2) If a
				single-phase metering installation is used on a varying load, the average error
				shall be the weighted algebraic average of the error at light load and the
				error at heavy load, the latter being given a weighting of 4 times the
				former.
(3) If a polyphase metering
				installation is used on a varying load, the average error shall be the weighted
				algebraic average of its error at light load given a weighting of 1, its error
				at heavy load and 100% power factor given a weighting of 4 and at heavy load
				and 50% lagging power factor given a weighting of 2.
(4) If a load, other than the light, heavy
				and low power-factor load specified for routine testing, is more representative
				of the customary use of the metering equipment, its error at that load should
				also be determined. In this case the average error is to be computed by giving
				the error at such load and power factor a weighting of 3 and each of the errors
				at the other loads (light, heavy and 50% lagging power factor) a weighting of
				1. Each error shall be assigned its proper sign.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0901 - Testing of metering installations-general requirements

Current through June 24, 2024
(1)
				The test of any unit of metering equipment shall consist of a comparison of its
				accuracy with a standard of known accuracy by a qualified person. Units not
				properly connected or not meeting the accuracy or other requirements of ss.
				PSC
				113.0811,
				113.0812 and at 113.0813 the time
				of test shall be reconnected and/or rebuilt to meet such requirements and
				adjusted to within the required accuracy and as close to 100% accurate as
				practicable or their use discontinued.
(2) Each unit of metering equipment shall be
				inspected for mechanical and electrical faults whenever the accuracy of the
				device is checked.
(3) Each meter
				tested shall have the register and the internal connections checked before the
				meter is first placed in service and whenever the meter is repaired.
(4) Each meter shall have the connections to
				the customer's circuits, the disc rotation and any multiplier checked when the
				meter is installed or removed or an instrument transformer is
				changed.
(5) Polyphase meters shall
				be tested for accuracy at 50% power factor before first being used for
				measuring customer's service either by a test of each meter or by a sample test
				plan approved under s.
				PSC
				113.0911(1) (a).
(6) The connections, phase sequence and
				multiplier of polyphase transformer-rated metering installations shall be
				checked for error by qualified personnel within 60 days after the meter is
				installed.
(7) Special control
				devices, switches, etc., for time-of-use service shall be checked for proper
				operation whenever the associated meter is tested.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0902 - Testing equipment

Current through June 24, 2024
(1) Each utility shall maintain sufficient
				laboratories, meter testing shops, secondary standards, instruments and
				facilities to determine the accuracy of all types of meters and measuring
				devices used by the utility. A utility may, however, with the approval of the
				commission, have all or part of the required tests made or its portable testing
				equipment checked by the original equipment manufacturers, another utility, or
				testing agency having adequate and sufficient testing equipment to comply with
				these rules.
(2) Each utility shall
				have the following minimum testing equipment available:
(a) One or more portable standard watthour
				meters of capacity and voltage range adequate to test all watthour meters used
				by the utility.
(b) Portable
				indicating instruments of such various types as are required to determine the
				accuracy of all instruments used by the utility.
(c) One or more secondary standards to check
				each of the various types of portable standard watthour meters used for testing
				watthour meters. Each secondary standard shall consist of either an approved
				portable standard watthour meter kept permanently at one point and not used for
				field work, or not less than three approved watthour meters connected with
				current coils in series and voltage coils in parallel and kept running by
				connecting a 10-watt load. These meters must be well compensated for both
				classes of temperature errors, practically free from errors due to ordinary
				voltage variations and free from erratic registration due to any
				cause.
(d) Suitable standards which
				are not used for field work to check portable instruments used in
				testing.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0903 - Accuracy and calibration of test standards

Current through June 24, 2024
(1)
(a) Utilities maintaining primary standards
				such as precision wattmeters, volt boxes, resistances, standard cells and
				timing devices shall have such standards certified at the time of purchase as
				to accuracy by a recognized laboratory other than that of the manufacturer of
				the standard.
(b) Utilities having
				standard cells shall intercompare them regularly and shall have at least one of
				them checked by a standardizing laboratory at intervals of not more than 2
				years. Reference standards of resistance, potentiometers and volt boxes shall
				be checked at intervals of not more than 3 years.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0904 - Watthour calibration

Current through June 24, 2024
Each utility which normally checks its own working portable
				  standard watthour meters or instruments against primary or secondary standards
				  shall calibrate these standards or instruments before they are submitted to a
				  commission-approved test facility annually and attach to them a record of such
				  calibration.
Previously s. PSC 113.46(2), with changes.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0906 - Methods of testing block-interval demand registers

Current through June 24, 2024
(1) For meters with
				block-interval demand registers, demand interval timing check shall be
				performed and a determination made that the pointer pusher or test dial pointer
				has reset to zero at the end of the billing period demand interval.
(2) Demand registers used with instrument
				transformer rated watthour meters shall be tested with the demand register
				mounted in a normal operating position on the watthour meter. The demand
				registered on the demand meter during the test shall be at least 30% of full
				scale with the demand test interval varying from a fraction of an interval up
				to a full interval.
(3) Demand
				registers used with self contained watthour meters shall be tested with the
				demand register mounted in a normal operating position on the watthour meter.
				The demand registered on the demand meter during the test shall be equivalent
				to the test ampere rating of the watthour meter with the demand test interval
				varying from a fraction of an interval up to a full interval.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0907 - Methods of testing block-interval pulse-operated demand meters and pulse recorders

Current through June 24, 2024
(1) The test of block-interval pulse-operated
				demand meters and pulse recorders shall include a check of the electrical and
				mechanical operation of the demand register or pulse recorder, an inspection of
				the pulse initiator and a check to determine that the demand meter resets
				properly.
(2) A demand meter or
				pulse recorder, its associated pulse initiators, relay and circuitry may be
				considered to be operating properly when a kilowatthour check indicates that
				the demand meter kilowatthours are within the required accuracy limits of the
				watthour meter kilowatthours.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0908 - Methods of testing electronic (solid state) meters

Current through June 24, 2024
(1) Each
				measurement circuit of an electronic meter shall be tested in accordance with
				the requirements of s.
				PSC
				113.0905. Internally calculated quantities, such as in
				a multifunctional meter, are not normally subject to test.
(2) Electronic meters designed to operate
				over an extended voltage range may be tested at a single test voltage point to
				determine meter accuracy.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0909 - Methods of testing electronic registers

Current through June 24, 2024
Necessary tests or checks shall be made to determine that the
				  correct program is in the meter, that the correct register is active as
				  determined from the program, that the meter is displaying the correct date and
				  time and that the meter's battery mode is working and will retain register
				  programs and recorded data during loss of power.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0910 - Methods of testing electronic demand registers

Current through June 24, 2024
Electronic demand registers shall be tested or checked for
				  accuracy. The operation and accuracy of the timing circuit shall be verified.
				  The accuracy must meet manufacturer's published specifications. The register
				  shall also be checked to verify that the program resets the demand period at
				  the end of the testing demand interval.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0911 - Testing of self-contained single-phase meters and 3-wire network meters at fixed periodic intervals

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) Self-contained
				single-phase meters and 3-wire network meters, together with associated
				equipment such as demand devices, control devices, etc., shall be tested for
				accuracy at unity power factor at the point where they are installed or at a
				central testing point or in a mobile testing laboratory under any of the
				following circumstances:
(a) Before being
				placed in service. For new meters given a prior test by the manufacturer, a
				sample test program meeting the requirements of s.
				PSC
				113.0920 or use of the manufacturer's certified test
				results for all meters tested under the provisions of s.
				PSC
				113.0921, may be substituted for this
				requirement.
(b) When they are
				suspected of being inaccurate or damaged.
(c) When the accuracy is questioned by a
				customer. See s.
				PSC
				113.0922.
(d) When they are removed from
				service.
(e) Within a period of 6
				months before to 6 months after 5 years of service for non-magnetic-bearing
				meters and 20 years of service for magnetic-bearing surge-proof meters or in
				accordance with the plan outlined in s.
				PSC
				113.0921.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0912 - Testing of self-contained polyphase meters

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) Self-contained
				polyphase meters together with associated equipment such as demand equipment,
				control devices, etc., shall be tested on the customer's premises, a central
				testing facility or in a mobile test facility, except pars. (a) and (d), for
				accuracy at unity and 50% power factor under the following circumstances:
(a) Before being placed in service. For new
				meters given a prior test by the manufacturer, the manufacturer's certified
				test results may be substituted for this requirement.
(b) When they are suspected of being
				inaccurate or damaged.
(c) When the
				accuracy is questioned by a customer. (See s.
				PSC
				113.0922.)
(d) Within 60 days after they are removed
				from service.
(e) Within a period
				of 6 months before or 6 months after 8 years of service for non-surge-proof and
				12 years for surge-proof meters. Exception: Thermal and mechanical
				lagged-demand meters shall be tested every 8 years. Electronic (solid state)
				meters may be tested instead in accordance with the plan outlined in s.
				PSC
				113.0921.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0913 - Testing of meters used with instrument transformers on single-phase service

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) Meters used with
				instrument transformers on single-phase service, together with associated
				equipment such as demand equipment, control devices, etc., shall be tested on
				the customer's premises, a central testing facility or in a mobile test
				facility, except pars. (a) and (d), for accuracy at unity power factor under
				the following circumstances:
(a) Before being
				placed in service. For new meters given a prior test by the manufacturer, the
				manufacturer's certified test results may be substituted for this
				requirement.
(b) When they are
				suspected of being inaccurate or damaged.
(c) When the accuracy is questioned by a
				customer. (See s.
				PSC
				113.0922.)
(d) When they are removed from
				service.
(e) Within a period of 6
				months before or 6 months after 8 years of service for non-surge-proof and 12
				years for surge-proof meters. Exception: Lagged-demand meters shall be tested
				every 8 years. Electronic (solid state) meters may be tested instead in
				accordance with the plan outlined in s.
				PSC
				113.0921.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0914 - Testing of polyphase electromechanical and completely solid state electronic meters used with instrument transformers at fixed periodic intervals

Current through June 24, 2024
In this section, "meter" or "meters" may refer to metering
				  system(s).
(1) Polyphase meters used
				with instrument transformers, together with associated equipment such as demand
				equipment, pulsing devices, phase-shifting transformers, control devices, etc.,
				shall be tested on the customer's premises, a central testing facility or in a
				mobile test facility, except for pars. (a) and (d), for accuracy at unity and
				50% power factor under the following circumstances.
(a) Before being placed in service. For new
				meters given a prior test by the manufacturer, the manufacturer's certified
				test results may be substituted for this requirement.
(b) When they are suspected of being
				inaccurate or damaged.
(c) When the
				accuracy is questioned by a customer. (See s.
				PSC
				113.0922.)
(d) When they are removed from
				service.
(e) Within a period of 4
				months before or 4 months after 2 years of service for non-magnetic-bearing
				electromechanical meters, 4 years of service for electromechanical
				magnetic-bearing surge-proof meters and 6 years of service for completely solid
				state electronic meters with electronic registers capable of down-loading
				voltage and current monitoring readings from the instrument transformers to
				digital meter reading devices at meter reading intervals. Exception: Electronic
				(solid state) meters may be tested instead in accordance with the plan outlined
				in s.
				PSC
				113.0921.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0915 - Testing of metering installations utilizing pulse devices

Current through June 24, 2024
(1) Metering
				installations utilizing pulse initiators and pulse recorders shall be checked
				for accuracy each billing period by comparing the recorded pulse count against
				the registration of the corresponding meter. When the results are not in
				agreement within the accuracy limits of s.
				PSC
				113.0812(2) the pulse devices shall
				be promptly tested and adjusted to required accuracy or replaced.
(2) Pulse devices shall be tested before use
				and as part of the complete metering installation whenever the associated
				watthour meter is tested.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0916 - Testing of instrument transformers

Current through June 24, 2024
(1) No instrument
				transformer shall be placed in service, or allowed to remain in service, if it
				shows evidence of physical damage, discolored terminals due to overload, change
				in texture or resiliency of insulation, or arc tracking on the insulation or
				bushings.
(2) Instrument
				transformers of all utilities shall be tested for voltage withstand by the
				manufacturer, the utility, or a laboratory approved for such test by the
				commission before being placed in service. Each instrument transformer that has
				been removed from service shall be tested for voltage withstand prior to
				reinstallation if the reason for removal or physical appearance, gives cause to
				doubt its reliability. The utility shall maintain a record of all such
				tests.
(3) Instrument transformers
				of class A privately-owned utilities shall be tested at the utility meter shop
				or the manufacturers' certified test reports may be used to determine accuracy
				(ratio correction factor and phase angle):
(a)
				Before being initially placed in service.
(b) When removed from service.
(c) When there is evidence from outward
				appearance or performance to suspect inaccuracy.
(d) The manufacturer's calibration results
				may be acceptable on all new voltage transformers rated above 15,000 volts.
				Removal tests of these transformers may also be omitted except in those cases
				where there is reason to suspect that a transformer malfunction has
				occurred.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0917 - Phase-shifting transformers and loss compensators

Current through June 24, 2024
(1) For
				phase-shifting transformers in service, all terminal connections shall be in
				such condition as to provide good electrical contact and the terminal
				designations shall be clearly visible. Where there is evidence of physical
				damage or evidence of thermal overload the unit shall be replaced.
(2) Phase-shifting transformers shall be
				tested on the same schedule and at the same time as the meters with which they
				are associated. The test shall consist of a single-phase test to be performed
				as follows: With the approximate rated voltage applied to the input terminals
				and no burdens connected to the tap terminals all tap voltages, converted to
				percentage of input voltage, shall agree within plus or minus 2.0% of the
				theoretical values given in the manufacturer's published data.
(3) In addition, all units shall be tested
				before use and when returned to the utility's meter laboratory. For these tests
				the output-voltage values in terms of percentage of input voltage and under the
				conditions of sub. (2) immediately above shall agree within plus or minus
				1.0%.
(4) For transformer-loss
				compensators in service all terminal connections shall be in such condition as
				to provide good electrical contact and the terminal designations shall be
				clearly visible. Where there is evidence of physical damage to the component
				parts, their adjustments, or to the internal wiring or evidence of thermal
				overload on the insulation, resistors, terminals, etc., the affected parts
				shall be replaced or the entire transformer-loss compensator
				replaced.
(5) Transformer-loss
				compensators shall be tested on the same schedule and at the same time as the
				meters with which they are associated.
(6) The tests shall be made at the normal
				service test points of the meter. Performance deviations from desired
				performance shall not exceed plus or minus 0.3%.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0918 - Adoption of standard by reference

Current through June 24, 2024
(1) ADOPTION OF
				STANDARD. Military Standard 414 (Mil-STD-414) dated June 11, 1957, is hereby
				incorporated by reference into ch. PSC 113 in part consisting of the cover page
				and pages 1, 2, 3, 4, 41, 42, 43, 45, 47, 48, 49, 50, 51 and 110. This
				published standard is entitled "Sampling Procedures and Tables for Inspection
				by Variables for Percent Defective" and is referenced in ss.
				PSC
				113.0920 and herein 113.0921 for application of these
				rules on maintenance of electric meter accuracy by statistical sample testing
				methods. Interim amendments to MIL-STD-414 will not be effective in this state
				until such time as this chapter is revised to reflect such changes.
(2) CONSENT TO INCORPORATE. Pursuant to s.
				227.21,
				Stats., the attorney general and the legislative reference bureau have
				consented to the incorporation by reference of MIL-STD-414 in part as
				designated in sub. (1). Copies are on file in the offices of the commission,
				the secretary of state and the legislative reference bureau.
(3) AVAILABILITY OF STANDARD. Copies of that
				part of MIL-STD-414 adopted herein may be obtained from the commission. Copies
				of the entire MIL-STD-414 may be ordered from the Superintendent of Documents,
				U.S. Government Printing Office, Washington, DC 20402.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0919 - Metering equipment records

Current through June 24, 2024
(1) METER TEST
				RECORDS.
(a) A utility shall keep a record of
				a test whenever a unit of metering equipment is tested. The meter test record
				shall include all of the following:
1.
				Information to identify the unit of metering equipment.
2. The service address at which the unit of
				metering equipment is installed.
3.
				The equipment with which the unit of metering equipment is
				associated.
4. The date of the
				test.
5. The reason for the
				test.
6. A statement of "as found"
				accuracies.
7. A statement of "as
				left" accuracies, when applicable.
8. The name of the person making the
				test.
9. The readings before and
				after the test.
10. A statement as
				to whether or not the unit of metering equipment "creeps" and in case of
				creeping, all of the following:
a. The
				rate.
b. A statement of "as found"
				and "as left" accuracies sufficiently complete to permit checking of the
				calculations employed.
c.
				Indications showing that all required checks have been made.
d. A statement of repairs made by the
				utility, if any, or a notation that the unit was returned to the manufacturer
				for repairs.
e. Identification of
				the testing standard.
Wisconsin Administrative Code › Public Service Commission › Chapter PSC 113 - Service Rules For Electrical Utilities › Subchapter IX - Electric Meter Testing Programs and Record Requirements › Section PSC 113.0923 - Commission referee test

Current through June 24, 2024
Upon written application to the commission by any electric
				  utility customer, the commission will referee a test covering the accuracy and
				  integrity of the customer's power meter installation, including an inspection
				  and verification of the connections and any other check or test which appears
				  desirable. The test will be performed in accordance with ss.
				  PSC
				  113.0905 through as 113.0915 applicable and shall be
				  made in accordance with s.
				  PSC 113.0811(1)
				  (c). The commission may limit the
				  availability, number or frequency of such referee tests for the same customer
				  at the same location where, in its judgment, the requests are too frequent,
				  burdensome, abusive, or otherwise unwarranted by the available information or
				  evidence.