S-E-06 — Specification for the Approval of Type of Electricity Meters and Auxiliary Devices - Amendments to Measurement Canada Specification LMB-EG-07

Display

A device or other means used to visually present the value of a measured quantity and other relevant information. It may take the form of an integral part of a meter or a separate display module.

Minimum Current

The smallest load current at which a device must operate within specified error limits. The minimum current shall be 1% of Imax or less if specified by the manufacturer.

Register (Electronic)

A memory location in the meter where the value of a measured quantity is electronically recorded.

Register (Mechanical)

A mechanical device integral to the meter where the value of a measured quantity is recorded and visually presented.

3-2.7.4 Multiplier

The meter multiplier, if other than one (1.0), shall be marked permanently and prominently, on the register face.

Note: This requirement may be satisfied through physical marking or via electronic display.

3-2.7.5 Clock Registers

The minimum diameter of clock dial circles shall be 10mm. Each dial shall be divided into ten equal and clearly numbered divisions. Preferably, the dials shall be distinctly separated from each other. The gearing shall be such that a complete revolution of any pointer shall cause the adjacent pointer on the left to advance one division.

The dial centres shall be located so as to avoid any possibility of ambiguity in reading.

3-2.7.6 Cyclometer Registers

The test dial of a cyclometer register may be of either the drum or pointer type.

If the test dial is of the drum type, it shall be divided into ten equal numbered divisions, marked "test dial", and a reference mark shall be provided on the register face for accurate reading.

The arrangement of the cyclometer drums and the cutouts on the register face shall be such that, with the exception of the fastest moving drum, one and only one digit is in full view, except when a drum is advancing from one position to another. The duration of this change period shall not exceed the time required for the fastest-moving drum to make one-tenth of a revolution.

The size and shape of any numerals shall be such that they are clearly legible.

3-2.9 Registers (Electronic)

Electronic registers shall be non-volatile (they shall be capable of storing the last recorded value of a measured quantity if the meter is subjected to a power failure). Stored values shall not be overwritten and shall be capable of being retrieved upon restoration of power.

Electronic register shall be capable of storing measurement information in a manner which provides for at least 5 digits of resolution at the display.

3-2.10 Means of Indication

The meter shall have one or more means of indication capable of presenting or displaying the numerical value of each legal unit of measure for which the meter is approved. The means of indication shall be either a register (mechanical) or a display.

3-4.1 Nameplates

Every meter, instrument or device shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly visible from the front, with all covers in place:

1. Name or mark of manufacturer
2. Type or designation
3. Serial number
4. Departmental approval number
5. Operating temperature range

Note: This requirement shall only apply if the operating temperature range is less than −40 °C to +53 °C (i.e., intended for temperature-controlled locations). This requirement may be satisfied through physical marking or via electronic display.

3-4.1.1 Space shall be provided for affixing the inspection number.

3-4.1.2 Additional marking requirements applicable to various types of meters and devices are set forth in subsequent sections specific to them.

Polyphase meters incorporating a unidirectional register or pulse output shall determine net polyphase registration resulting from the combined measurements of all elements of the meter prior to applying any detent function which prevents registration or pulse outputs when energy is applied in the reverse direction.

4-2.1.1
Direction of Rotation Viewed from above, the direction of rotation of the disc shall be counterclockwise.

4-2.1.2.2
On self-contained single-phase meters, the disc shall carry the following markings, in black:

On the upper periphery, one hundred divisions, with every tenth division identified consecutively by the figures 10, 20, …, 90.

4-2.2.3 Test Dials

With the exception of meters equipped with a multi-rate register, all single-phase meters shall be provided with a special test dial for testing the register. In the case of polyphase meters, if the lowest reading dial or drum requires more than one hour to make one complete revolution when the meter under single-phase conditions specified in 3-5.1 (vi) is running on maximum load or 100 A, whichever is lesser, a test dial shall be provided.

The pointer of the test dial shall rotate at ten times the speed of the lowest reading dial or drum. There shall be no figures on the test dial but it shall be divided into ten equal divisions. The direction of rotation shall be indicated by means of an arrow.

4-4.1 Nameplates

In addition to the requirements of subsection 3-4, every meter used for single-point metering shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place.

1. Rated frequency ^{Footnote a}
2. Rated voltage or voltages
3. Minimum and maximum rated currents
4. Disc constant ^{Footnote a}
5. Meter configuration notations, the following examples are recommended: ^{Footnote a}
   • 1-phase, 2-wire
   • 1-phase, 3-wire
   • 1-phase, 3-wire, 2-element
   • 2-element network
   • 2½ (2.5)-element wye or delta
   • 3-element wye
   • Auto detect
6. For single-phase transformer-type meters, the words "Transformer Type"
7. For transformer-rated meters,
   1. Primary disc constant ^{Footnote a}
   2. Current transformer rating (e.g., 1000-5 A) ^{Footnote a}
   3. Voltage transformer rating (e.g., 600-120 V) ^{Footnote a}

Note 1: Accepted symbols are Ø, EL, Y and Δ.

Note 2: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage.

4-4.1.1
If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided.

6-2.2 Testing

6-2.2.1
Each meter shall provide testing means analogous to counting the disc revolutions of an induction watt-hour meter. A means of testing shall be provided for each energy quantity measured (e.g., W·h, var·h, etc.).

6-2.2.2
Each meter shall provide pulses or some other form of discrete indication (e.g., light, KYZ, LCD, etc.) of energy accumulation registered by the meter. Each pulse or indication shall represent the same finite amount of energy.

6-2.2.3
Each meter shall provide discrete energy accumulation indications, including pulses, in sufficient numbers and frequency to ensure that the time required to test the meter is comparable to the time required to test an electromechanical energy meter of the same load rating and configuration.

6-2.2.4
Access to the means for testing shall be available with the meter cover in place, without the need to break the verification seal at either the operational location or at another location.

6-2.2.5
Specialized test equipment that may be required to test devices which have unique testing means and are compliant with the above requirements shall be provided free of charge by the contractor, as prescribed under section 19 of the Electricity and Gas Inspection Act. The specialized equipment shall also be provided during the approval process by the approval applicant.

Section 6.2.3 Test Mode

6.2.3.1
Electronic meters submitted to Measurement Canada for approval of the test mode for use during inspections shall have the test mode evaluated to determine the extent to which it is suitable for meter verification testing.

6.2.3.2
The meter design schematics, operational block diagrams, or other engineering and technical data shall be evaluated to confirm that there are no internal or external factors which can cause a difference between the resultant measured values obtained in the test and normal operating modes.

6.2.3.3
Each legal unit of measurement evaluated for approval shall be evaluated in accordance with the requirements of clauses 6.2.3.4 and 6.2.3.5, as applicable, for each mode of operation.

6.2.3.4
The accuracy of the energy quantities shall be evaluated, as a minimum, in accordance with the test points and tolerance limits for each voltage, current, and power factor specified in Table 1. For the purposes of evaluation, the voltage circuits shall be connected in parallel and current circuits connected in series, in a single-phase configuration.

6.2.3.5 The accuracy of the demand quantities shall be evaluated, as a minimum, in accordance with the test points and tolerance limits for each voltage, current, and power factor specified in Table 2. For the purpose of evaluation, the voltage circuits shall be connected in parallel and current circuits connected in series, in a single-phase configuration.

6.2.3.6 Where the test mode is found to comply with 6.2.3.4 and 6.2.3.5, the Notice of Approval shall clearly indicate one of the following as applicable:

1. the test mode is approved for the purpose of verifying the performance and accuracy of energy measurement functions which have been approved as legal units of measurement in this Notice of Approval.
2. the test mode is approved for the purpose of verifying the performance and accuracy of demand measurement functions which have been approved as legal units of measurement in this Notice of Approval.
3. the test mode is approved for the purpose of verifying the performance and accuracy of energy and demand measurement functions which have been approved as legal units of measurement in this Notice of Approval.

6-3.3Firmware Versions

Meter firmware versions shall be prominently indicated either on the meter nameplate or via the electronic display.

6-3.4 Nameplates for Single Customer Meters

In addition to the requirements of subsection 3-4, every single customer meter used for single-point metering shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place.

1. Rated frequency ^{Footnote b}
2. Rated voltage or voltages
3. Minimum and maximum rated currents
4. Disc constant ^{Footnote b}
5. Meter configuration notations, the following examples are recommended: ^{Footnote b}
   • 1-phase, 2-wire
   • 1-phase, 3-wire
   • 1-phase 3-wire, 2-element
   • 2-element network
   • ½ (or 2.5)-element wye or delta
   • 3-element wye
   • uto detect
6. For single-phase transformer-type meters, the words "Transformer Type"
7. For transformer-rated meters,
   1. Primary disc constant ^{Footnote b}
   2. Current transformer rating (e.g., 1000-5 A) ^{Footnote b}
   3. Voltage transformer rating (e.g., 600-120 V) ^{Footnote b}

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed elsewhere on the meter, on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application.

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed on the terminal cover on condition that this same information also appears elsewhere on the meter itself. In such a case, as a minimum, the serial number affixed on the meter itself shall be visible when the meter is installed.

Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval.

Note 1: Accepted symbols are Ø, EL, Y and Δ.

Note 2: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage.

6-3.4.1
If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided.

6-3.5 Nameplates for Multiple Customer Metering Systems

In addition to the requirements of subsection 3-4, every multiple customer metering system (MCMS) shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place.

1. Rated frequency ^{Footnote c}
2. Rated voltage or voltages
3. Minimum and maximum rated currentsf
4. Disc constant ^{Footnote c}
5. The actual configuration of each meter, as programmed in the MCMS. The following examples are recommended: ^{Footnote c}
   • 1-phase, 2-wire
   • 1-phase, 3-wire, 2-element
   • 2-element network
   • 2-element, delta
   • 3-element, wye
6. For single-phase transformer-type meters, the words "Transformer Type"
7. For transformer-rated meters,
   1. Primary disc constant ^{Footnote c}
   2. Current transformer rating, e.g., 200-100m A ^{Footnote c}
   3. Voltage transformer rating, e.g., 600-120 V ^{Footnote c}

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter shall be placed elsewhere on the meter on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application.

Where the configuration information is not available on the nameplate or approved electronic display, the MCMS unit shall have a secondary nameplate, configuration chart or supporting documentation which provides the specific configuration information of each meter as programmed in the MCMS. The information shall be clearly identified as supporting documentation for the configuration of the device. Provision of configuration information may be satisfied through the use of an alternate electronic display such as a laptop or a PC connected to the MCMS.

If an MCMS has more than one configuration, all approved configurations specific to that model shall be on the nameplate. If an MCMS has the same configuration for each meter, the applicable configuration can be the only one to appear on the nameplate.

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed on the terminal cover on condition that this same information also appears elsewhere on the meter itself. In such a case, as a minimum, the serial number affixed on the meter itself shall be visible when the meter is installed.

Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval.

Note 1: Accepted symbols are Ø, EL, Y and Δ.

Note 2: For 3-element meters, rated voltage is phase to neutral voltage.

6-3.5.1
If the meter is fitted with accessories such as a reverse running detent or retransmitting contacts, this shall be specified on the nameplate or on an auxiliary plate, and a diagram of connections shall be provided.

7-2.1.2.1 General

All clock-type indicators shall have at least three dials.

The minimum diameter of clock dial circles shall be 10 mm.

Each dial shall be divided into ten equal and clearly numbered divisions. The gearing shall be such that a complete revolution of any pointer shall cause the adjacent pointer to the left to advance one division.

7-2.1.3.1 General

All cyclometer-type demand indicators shall have at least three digits.

The size and shape of the numerals shall be such that they are clearly legible.

The arrangement of the cyclometer drums and the cutouts on the demand-indicator face shall be such that, with the exception of the fastest moving drum, one and only one digit is in full view at all times except when the drum is advancing from one position to the next.

7-4 Markings

7.4.1 Nameplate Marking

In addition to the requirements of subsection 4-4, demand meter nameplates shall bear the following information:

1. Response period or demand interval ^{Footnote d}
2. Full-scale demand rating
3. Single-phase test constant (if applicable)
4. All information required to determine the demand from the meter indication

7-4.1.1
The marking shall be indelible, distinct, and visible from outside the meter with its cover in place.

Note: This requirement may be satisfied through physical marking or via electronic display.

8-4 Markings

8.4.1 Nameplate Marking

In addition to the requirements of subsection 4-4, every meter shall bear, as appropriate, the following information:

1. Auxiliary supply voltage
2. For secondary rated meters, the disc constant in A²·h per revolution
3. For primary rated meters,
   1. Primary line resistance
   2. Primary disk constant in kW·h per revolution

9-3 Markings

9.3.1 Nameplate Marking

In addition to the requirements of subsection 8-4, every meter shall bear, as appropriate, the following information:

1. Voltage and frequency of auxiliary power supply
2. For secondary rated meters, the test constant and pulse constant in A²·h per pulse

12-4 Markings

12-4.1 Nameplate Marking

In addition to the requirements of subsection 3-4.1, every pulse device shall bear, as appropriate, the following information:

12-4.1.1 Pulse Initiators (information may be on initiator or host meter)

1. Pulse initiator output constant Kp

12-4.1.2 Relays and Pulse Amplifiers

1. Type of input (2 or 3-wire)
2. Type of output (2 or 3-wire)
3. Voltage and frequency of the auxiliary power supply (if applicable)
4. Rated or maximum voltage and frequency (pulses per unit time) of input pulses
5. Minimum pulse width, if critical to the operation of the device
6. Connection diagram

12-4.1.3 Totalizers

1. Input to output pulse ratio (prescaler unit)
2. Number of additive and subtractive elements. If both are present, each shall be clearly identified
3. Type of input (2-wire or 3-wire)
4. Type of output (2-wire or 3-wire)
5. Voltage and frequency of the auxiliary power supply
6. Rated or maximum voltage and frequency (pulses per unit time) of the input pulses
7. Connection diagram

13-4 Markings

13-4.1 Nameplate Marking

In addition to the requirements of subsection 3-4.1, every programmable device and pulse recorder shall bear, as appropriate, the following information:

1. Demand interval ^{Footnote e}
2. Update interval, and for each channel, input identification, pulse constant and multiplier or prescaler unit ^{Footnote f}
3. Rated voltage and frequency of the auxiliary power supply
4. Rated or maximum voltage and frequency (pulses per unit time) of the input pulses
5. Connection diagram

Note: Where the device is a register included as an integral part of a meter and it is not detachable, the above information may be shown on the meter nameplate.

15-2.1 General

The requirements of subsection 3-2 shall apply.

15-2.2 Reset Device

A mechanical reset device shall be such that, in its normal position, it does not affect the values stored in maximum demand registers and/or displayed by them. Means shall be provided for sealing the reset device in this position. Resetting of any maximum demand register shall only be possible either after breaking the seal or with a special tool.

15-3.2 Demand Interval

The demand interval shall be not less than 15 minutes. The demand shall be averaged over the demand interval, but it may be recalculated after each update interval.

15-3.4 Reset Device

15-3.4.1 A meter that is equipped with a register for maximum demand values of any legal unit of measurement, and is not equipped with a mechanical reset mechanism shall have electronic means by which the maximum demand register may be reset.

15-3.4.2 Resetting shall be performed through an on-board device or a remote mechanism. Actuation of the reset means shall have the effect of resetting demand values stored in any maximum demand register to zero, or to the current demand value.

15-4 Markings

15-4.1 Nameplates for Single-Customer Meters

In addition to the requirements of subsection 3-4, every meter used for single-point metering shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place.

1. Rated frequency ^{Footnote g}
2. Rated voltage or voltages
3. Minimum and maximum rated currents
4. Response period or demand interval ^{Footnote g}
5. Update interval (if applicable) ^{Footnote g}
6. Maximum demand rating ^{Footnote g}
7. Single-phase test constant (if applicable) ^{Footnote g}
8. Meter configuration notations, the following examples are recommended: ^{Footnote g}
   • 1-phase, 2-wire, 1-phase, 3-wire
   • 1-phase, 3-wire, 2-element, 2-element, network
   • 2-element, delta 2½ (or 2.5)-element wye or delta
   • 3-element wye Auto detect
9. All information required to determine the demand from the meter indication ^{Footnote g}
10. For primary rated meters,
    1. Current transformer rating (e.g., 100-5 A) ^{Footnote g}
    2. Voltage transformer rating (e.g., 600-120 V) ^{Footnote g}
11. For single-phase transformer-type meters, the words "Transformer Type"
12. Loss compensated (indelibly marked on the nameplate of meters which are internally compensated for line or transformer losses)
13. Firmware versions ^{Footnote g}

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed elsewhere on the meter on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application.

Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval.

Note 1: Accepted symbols are Ø, EL, Y and Δ.

Note 2: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage.

If the meter is provided with accessories such as retransmitting contacts, this shall be specified on the nameplate and a diagram of connections shall be provided if considered necessary by the Director.

15-4.2 Nameplates for Multiple Customer Metering Systems

In addition to the requirements of subsection 3-4, every multiple customer metering system (MCMS) shall have the following details indelibly and distinctly marked on one or more nameplates attached in such a way as to be clearly legible from the front, with all covers in place.

1. Rated frequency ^{Footnote h}
2. Rated voltage or voltages
3. Minimum and maximum rated currents
4. Response period or demand interval ^{Footnote h}
5. Update interval (if applicable) ^{Footnote h}
6. Maximum demand rating ^{Footnote h}
7. Single-phase test constant (if applicable) ^{Footnote h}
8. The actual configuration of each meter, as programmed in the MCMS. The following examples are recommended: ^{Footnote h}
   • 1-phase, 2-wire, 1-phase, 3-wire, 2-element
   • 2-element, network 2-element, delta
   • 3-element, wye
9. All information required to determine the demand from the meter indication ^{Footnote h}
10. For primary rated meters,
    1. Current transformer rating (e.g., 200-100 mA) ^{Footnote h}
    2. Voltage transformer rating (e.g., 600-120 V) ^{Footnote h}
11. For single-phase transformer-type meters, the words "Transformer Type"
12. Loss compensated (indelibly marked on the nameplate of meters which are internally compensated for line or transformer losses)
13. Firmware versions ^{Footnote h}

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter shall be placed elsewhere on the meter on condition that this same information also appears either inside or outside of the cover of an enclosure which shall be submitted as part of the approval of type application.

Where the configuration information is not available on the nameplate or approved electronic display, the MCMS unit shall have a secondary nameplate, configuration chart or supporting documentation which provides the specific configuration information of each meter as programmed in the MCMS. The information shall be clearly identified as supporting documentation for the configuration of the device. Provision of configuration information may be satisfied through the use of an alternate electronic display such as a laptop or a PC connected to the MCMS.

If an MCMS has more than one configuration, all approved configurations specific to that model shall be on the nameplate. If an MCMS has the same configuration for each meter, the applicable configuration can be the only one to appear on the nameplate.

In the case where the size or the design of the meter limits the amount of information that can be put on the front of the meter, the information not appearing on the front of the meter may be placed on the terminal cover on condition that this same information also appears elsewhere on the meter itself. In such a case, as a minimum, the serial number affixed on the meter itself shall be visible when the meter is installed.

Meters approved with nameplate information not legible from the front of the meter shall be approved for installation only on the load side of the main switch or circuit breaker of the service for which the meter is installed. This installation restriction will be contained in the Notice of Approval.

Note 1: Accepted symbols are Ø, EL, Y and Δ.

Note 2: For 2½-element wye and 3-element meters, rated voltage is phase to neutral voltage.

If the meter is provided with accessories such as retransmitting contacts, this shall be specified on the nameplate and a diagram of connections shall be provided if considered necessary by the Director.

16-4 Markings

16-4.1 Nameplates

In addition to the applicable requirements of section 4-4, the nameplate shall bear the following information:

1. For secondary rated meters, the single phase test constant and the pulse constant Kp in V2.h per pulse
2. For primary rated meters:
   1. Voltage transformer ratio
   2. Pulse constant Kp in V².h per pulse

17-4 Markings

17-4.1 Nameplates

In addition to the requirements of clause 16-4, the nameplate shall bear the following information:

1. Firmware versions (prominently indicated either on the meter nameplate or via the electronic display).