49
KNOXVILLE UTILITIES BOARD STANDARDS AND SPECIFICATIONS Released XX.XX.XX Electric Metering 16210-1 SECTION 16210 ELECTRIC METERING PART 1. GENERAL 1.1 Around 1990 KUB began using an “electronic meter” which is basically a digital device measuring analog values. It contains built-in precision current and potential transformers to produce values suitable for electronic circuits. This is a known analog ratio of actual load current and voltage. These analog signals are sampled many times per hour and fed into Analog-to-Digital Converters. This results in a very accurate digital form of the current and voltage. As the current and voltage are sampled, Real Power is calculated in a Digital Signal Processor (DSP) by multiplying the Current times the Voltage times the Power Factor. The Power Factor (PF) is the Cosine of the measured angle displacement between the voltage and the current. Newer electronic meters can measure and record harmonics, voltage imbalance, current imbalance, and other quantities. Some customers opt for an electronic meter with a “telephone modem” (KYZ) which supplies several pulse signals that enable customers to control power usage and track “demands”. KUB also installs modems for automatic/remote meter reading. Customer should have phone connection within twelve inches of the meter. This will advance the MV-90 Remote Reading Module. This phone connection does not need to be a dedicated line, but can be an extension. The “demand” of a service is the amount of power delivered averaged over a specified interval of time (typically 30 minutes). For any commercial/industrial service with an estimated demand of over 50 kW (kilowatts), KUB will install an electronic meter with demand register. Electric bills can contain as many as 3 metered quantities: (1) Kilowatt-Hours (kWh) (The Power Consumed each month) (2) Kilowatts Demand (The Max. Consumption in a 30-minute period each month) (3) Kilowatts (kW) Demand with Power Factor (PF) Penalty. Due to customer inductance & capacitance in Alternating-Current (AC) circuits, the current & voltage get out of phase with each other (by an angle “A”). A penalty is imposed for operating at Power Factors below 0.85 (voltage lagging the current). In specific situations there is also a Power Factor penalty for operating above 1.00 (voltage leading the current). (a) kW = Real Power required to do work = current X voltage X PF (cos A) (b) kVA = Apparent Power = current X voltage (c) RkVA = Power that performs no work = current X voltage X sin A (d) PF = Ratio of Real Power to Apparent Power = kW divided by kVA 1.2 ELECTRIC METER CODES: All KUB electric meters have unique numbers. This unique number includes a 5 digit prefix, and a 5 digit suffix. The prefix describes the meter, while the suffix indicates the particular meter number within a group. For example: J2E08 12345

SECTION 16210 ELECTRIC METERING - Knoxville Utilities · PDF file · 2016-09-20connection does not need to be a dedicated line, but can be an extension. ... an extremely long building

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KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-1

SECTION 16210

ELECTRIC METERING

PART 1. GENERAL

1.1 Around 1990 KUB began using an “electronic meter” which is basically a digital device measuring

analog values. It contains built-in precision current and potential transformers to produce values

suitable for electronic circuits. This is a known analog ratio of actual load current and voltage.

These analog signals are sampled many times per hour and fed into Analog-to-Digital Converters.

This results in a very accurate digital form of the current and voltage. As the current and voltage

are sampled, Real Power is calculated in a Digital Signal Processor (DSP) by multiplying the

Current times the Voltage times the Power Factor. The Power Factor (PF) is the Cosine of the

measured angle displacement between the voltage and the current. Newer electronic meters can

measure and record harmonics, voltage imbalance, current imbalance, and other quantities. Some

customers opt for an electronic meter with a “telephone modem” (KYZ) which supplies several

pulse signals that enable customers to control power usage and track “demands”. KUB also installs

modems for automatic/remote meter reading. Customer should have phone connection within

twelve inches of the meter. This will advance the MV-90 Remote Reading Module. This phone

connection does not need to be a dedicated line, but can be an extension. The “demand” of a

service is the amount of power delivered averaged over a specified interval of time (typically 30

minutes). For any commercial/industrial service with an estimated demand of over 50 kW

(kilowatts), KUB will install an electronic meter with demand register.

Electric bills can contain as many as 3 metered quantities:

(1) Kilowatt-Hours (kWh) (The Power Consumed each month)

(2) Kilowatts Demand (The Max. Consumption in a 30-minute period each month)

(3) Kilowatts (kW) Demand with Power Factor (PF) Penalty. Due to customer inductance &

capacitance in Alternating-Current (AC) circuits, the current & voltage get out of phase

with each other (by an angle “A”). A penalty is imposed for operating at Power Factors

below 0.85 (voltage lagging the current). In specific situations there is also a Power Factor

penalty for operating above 1.00 (voltage leading the current).

(a) kW = Real Power required to do work = current X voltage X PF (cos A)

(b) kVA = Apparent Power = current X voltage

(c) RkVA = Power that performs no work = current X voltage X sin A

(d) PF = Ratio of Real Power to Apparent Power = kW divided by kVA

1.2 ELECTRIC METER CODES:

All KUB electric meters have unique numbers. This unique number includes a 5 digit prefix, and a

5 digit suffix. The prefix describes the meter, while the suffix indicates the particular meter number

within a group.

For example: J2E08 – 12345

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-2

J2E08 J2E08 J2E08 J2E08 (J2E8)

Meter Configuration or Use Service Voltage Service Type & Phases Meter A or CT

A – Bottom-connected 1 – 120 Volts A – 2-Wire, 1-PH 2 – 5 Amps

B – Socket-type 2 – 120/240 Volts C – 3-Wire, 3-PH 4 – 10 Amps

C – Legacy, not used (Begin PT's) E – 3-Wire, 1-PH 5 – 15 Amps

D – Socket-type 3 – 480Y/277 Volts F – 4-Wire, 3-PH Wye 6 – 20 Amps

E – Bottom-connected 4 – 480 Volts G – 4-Wire, 3-PH Delta 7 – 25 Amps

F – Socket-type 6 – 4000Y/2300 H – 3-Wire, 2-PH Network 8 – 30Amps

G – Bottom-connected 7 – 69000Y/40000 J – 4-Wire, 3-PH Wye Z-coil 10 – 50Amps

H – Socket-type 8 – 13800 Y/7980 K – 2 or 3-Wire, 1-PH 120V (Begin CT's)

J – Socket-type 12 – 75 Amps

K – Bolt-in 400 Amps 13 – 80 Amps

L – Socket-type with load control 14 – 100 Amps

M – Socket-type with mass memory kVA 17 – 150 Amps

N – Socket-type 320 Amps self-contained CT/PT 18 – 200 Amps

P – Socket-type Solid State 20 – 300 Amps

Q – Bottom-connected Reactive Meter A or CT 21 – 400 Amps

R – Socket-type with mass memory RkVA (Continued) 22 – 500 Amps

T – Socket-type with wake-up ERT 29 – 2000 Amps 24 – 600 Amps

W – Itron ERT 30 – 3000 Amps 25 – 800 Amps

X – Meter w/a Sensus Communications Device 31 -- 4000 Amps 26 – 1000

Amps

Z – Socket-type Electronic 32 – 5000 Amps 27 – 1200 Amps

33 – 750 Amps 28 – 1500 Amps

1.3 Only one meter for each service voltage class will be installed and maintained by KUB for each

customer at each service address. The only exceptions to this rule are (a) for customers such as

hospitals, who opt for a stand-by service with automatic transfer scheme, and (b) for customers with

an extremely long building that necessitates a service on each end (with concurrence of the

electrical inspector & KUB). When an additional service at a different voltage class is metered at

the same customer building, the additional meter and service disconnect should be located next to

the existing meter and disconnect. When this location is not feasible for the additional meter and

disconnect, the customer shall erect at each meter location a placard identifying the location of the

other meter and disconnect.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-3

1.4 All meters, service drops, and other electrical facilities installed by KUB at its expense upon the

customer’s premises for the purpose of delivering to and measuring electric power to the customer

will continue to be the property of KUB.

1.5 The customer will provide and maintain without cost to KUB sufficient and proper facilities for the

installation of meters and other apparatus at an easily accessible location on or within the premises

to be served and in accordance with KUB standards & specifications. All meter sockets, meter

stacks, and modular metering systems will be manufactured in accordance with the latest revision

of American National Standards Institute (ANSI) C.12.7 as well as all other applicable codes and

standards. No wiring dependent upon the meter location should be started until the meter location

has been definitely approved by KUB’s Field Marketing Representative. The meter socket will be

plumb (5 to 6 feet above grade) and securely fastened to the external building wall, pole, pedestal,

or transformer (when applicable). A minimum of 2 feet of clear space measured from any part of

the meter socket to all conduits, pipe, walls, etc. must be maintained for servicing. Outdoor meters

will not be installed where they will interfere with traffic, sidewalks, driveways, or where they will

obstruct the opening of doors or windows, or in any location which may be considered hazardous or

cause damage to the metering equipment. Indoor meter installations are to be avoided.

1.6 Where service is supplied to individual customers located in a structure designed for multiple

occupancy, the individual meters will be grouped at a point nearest the service entrance attachment.

(See Article 370 of the National Electrical Code.) The mounting heights for multiple meter stacks

will be no lower than 3 feet from final grade to the center of the lowest meters and will be no higher

than 6 feet from grade to the center of the highest meters.

1.7 Current Transformers (CT’s) external to the meter housing are required if the customer’s service

(main) size is over 400 amperes (400A). The cable length between the CT’s and the meter should

never exceed 40 feet in length. KUB’s Field Marketing Representative must approve the CT’s

location.

KUB standard CT sizes KUB standard CT styles

300 / 5A (900A max.) PDMO (for pad-mounted transformers)

600 / 5A (1800A max.) PLMO (for pole & other mountings)

1500 / 5A (4500A. max.)

1.8 Meters and service equipment may be subjected to heavy fault currents in the event of a ground

fault. For this reason, it is imperative that all meter sockets and metal conduits be adequately

bonded to neutral and to ground.

1.9 The customer must not tamper or otherwise interfere with the proper operation of KUB’s meter or

other equipment. Only authorized KUB personnel are permitted to connect, disconnect, move, or

remove meters.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-4

PART 2. PRODUCTS

Not Used.

PART 3. EXECUTION

3.1 SINGLE-PHASE METERING

KUB uses two basic types of electrical single-phase metering: Self-contained Metering &

Transformer-rated Metering.

SELF-CONTAINED METERING:

Electrical service sizes of “400A & below” are metered with Self-contained Metering, which means

that all associated hardware is self-contained within the meter housing. The meter “class

designation” (CL) denotes the maximum of the load range in amperes. KUB uses the CL200 (Form

2S) 240V self-contained meter for 2-wire, 120V, 30A services, and for 3-wire, 120/240V, 60A

through 225A services. The CL200 (Form 12S) 120V self-contained meter is for 3-wire, 120/208V,

200A services. The CL320 (240V) is a newer socket type that requires special meter bases (5T and

7T types) for mounting. The current transformers are contained within the CL320 meter housing.

The customer is responsible for furnishing and installing the meter base (to KUB specifications),

and must have this installation inspected by the electrical inspector before KUB installs the meter.

TRANSFORMER-RATED METERING:

Electrical service sizes “greater than 400A” will be metered with appropriately-sized Current

Transformers (CT’s).

For KUB standard CT sizes & styles, see Section 16210-3, Paragraph 1.7.

For any commercial single-phase service with an estimated “demand” of “50kW (kilowatts) or

greater”, KUB will install an electronic meter with demand register instead of the typical rotating-

disk meter. The “demand” of a service is the amount of power delivered averaged over a specified

interval of time. The most common specified time interval used in commercial demand metering is

30 minutes.

See the “Meter Application Guide” on page 16210-6 for selection of the proper meter (and current

transformer) sizes for single-phase services.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-5

See the following standard drawings for preferred residential meter location, meter drawing

symbols & single-phase meter wiring diagrams:

16210-RLOC (Preferred Residential Meter Locations)

16210-SYMB (Meter Connection Drawing Symbols)

16210-J2E08 (Meter Wiring for 120V/240V, 1PH, 3W, 200A & Below Service) PMT & OHT

16210-K2E21 (Meter Wiring for 120V/240V, 1PH, 3W, 400A & 320A Service) PMT & OHT

16210-Z2EX (Meter Wiring for 120V/240V, 1PH, 3W, CT-Rated Service) PMT

16210-Z2EXO (Meter Wiring for 120V/240V, 1PH, 3W, CT-Rated Service) OHT

16210-H1K08 (Meter Wiring for 120V, 1PH, 2W, 30A Service) PMT & OHT

16210-Z1H08 (Meter Wiring for 120V/208V, 1PH, 3W, 200A & Below Service) Overhead

16210-Z8KXX (Meter Wiring for 7.62kV, 1PH, 2W, Primary Service)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-6

SINGLE-PHASE METER APPLICATION GUIDE:

Service Main Sw Est kVA Meter CT Amp Meter

Voltage Amperes Load Base Ratio Type Notes

120/240V 60 -- 200A -- P2E08 (A)

3W, 1PH 100 -- 200A -- P2E08 (A)

150 -- 200A -- P2E08 (A)

200-225 -- 200A -- P2E08 (A)

320 50 400A -- N2E10 (A)

600-800 -- CT 300/5 Z2E20 (B)

1000 <200 CT 300/5 Z2E20 (B)

1000 >200 CT 600/5 Z2E24 (B)

120V 30 -- 200A -- P1K08 (A)

2W, 1PH

120/208V 200 -- 200A -- Z1H08 (C)

3W, 1PH 400 -- 400A -- N1H10 (C)

ALL ABOVE SERVICES HAVE A GROUNDED CONDUCTOR.

(A) Customer to supply socket-type meter base to meet or exceed size shown.

(B) KUB to supply all CT-type meter bases. The preferred location for CT-type meter base

is on (or near) KUB facilities.

(C) Requires a 5-terminal “12S” meter base. N1H10 meter (electronic with demand

capacity) may also be used.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-7

GENERAL: ELECTRICAL THREE-PHASE 3-WIRE METERING

Even though KUB no longer allows non-standard 3-phase 3-wire services for new customers, there

are still many existing 3-phase 3-wire services in KUB’s electric system. This section will cover

the specifications for the metering of these 3-wire (delta-configuration) services. The 2 types of

metering are Self-contained Metering & Transformer-rated Metering.

SELF-CONTAINED METERING:

Electrical service sizes of “400A & below” are metered with self-contained metering, which means

that all associated hardware (PT’s and/or CT’s) is self-contained within the meter housing.

All self-contained metering of 480V services must have a (KUB-approved) means of

disconnect ahead of the meter to facilitate the removal or replacement of the meter without

endangering metering personnel.

KUB’s Field Marketing Representative must approve all meter locations.

TRANSFORMER-RATED METERING:

Electric service sizes “greater than 400A” are metered with appropriately sized CT’s (Current

Transformers) & PT’s (Potential Transformers). KUB uses 3 basic sizes of CT’s are 300/5A (up to

900A maximum), 600/5A (up to 1800A maximum) & 1500/5A (up to 4500A maximum). Potential

Transformer (PT) size is 4/1 (or 480V/120V) for 480V services or 2.4/1 (or 277V/120V) for

277V/480V services. .

See the following standard drawings for 3-phase, 3-wire meter wiring diagrams:

16210-Z2C08 (Meter Wiring for 240V, 3PH, 3W, 200A & Below Service) OHT

16210-N2C21 (Meter Wiring for 240V, 3PH, 3W, 320A Service) OHT

16210-Z2CX (Meter Wiring for 240V, 3PH, 3W, CT-Rated Service) OHT

16210-Z4C08 (Meter Wiring for 480V, 3PH, 3W, 200A & Below Service) OHT

16210-N4C21 (Meter Wiring for 480V, 3PH, 3W, 400A Service) OHT

16210-Z4CX (Meter Wiring for 480V, 3PH, 3W, CT-Rated Service) OHT

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-8

FOR ELECTRIC METER CODES, SEE PAGE 16210-2.

METER APPLICATION GUIDE FOR OBSOLETE SERVICES

Service Main Sw Est kVA Meter CT Amp Meter

Voltage Amperes Load Base Ratio Type Notes

240V 100 -- 200A -- Z2C08 (A)

3W, 3PH 200 -- 200A -- Z2C08 (A)

400 -- 400A -- N2C10 (A)

600-800 -- CT 300/5 Z2C20 (B)

1000-1200 <374 CT 300/5 Z2C20 (B)

1000-1200 >374 CT 600/5 Z2C24 (B)

480V 100 -- 200A -- Z4C08 (A)

3W, 3PH 200 -- 200A -- Z4C08 (A)

400 -- 400A -- N4C10 (A)

600 -- CT 300/5 Z4C20 (B)

ALL ABOVE SERVICES ARE UNGROUNDED.

(A) Customer to supply socket-type meter base to meet or exceed size shown. Customer to

supply disconnect switch ahead of meter base for all 480V non-CT services. PT’s are self-

contained in meter housing for these 480V services.

(B) KUB to supply all CT-type meter bases. Use “R” instead of “Z” if leading power factor.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-9

GENERAL: ELECTRICAL THREE PHASE 4-WIRE METERING

KUB uses two basic types of electrical 3-phase 4-wire metering Self-contained Metering &

Transformer-rated Metering.

Electric bills can contain as many as 3 metered quantities:

(1) Kilowatt-Hours (kWh) (The Power Consumed each month)

(2) Kilowatts Demand (The Maximum Consumption in a 30-minute period each month)

(3) Kilowatts (kW) Demand with Power Factor (PF) Penalty. Due to customer inductance &

capacitance in Alternating-Current (AC) circuits, the current & voltage get out of phase

with each other (by an angle “A”). A penalty is imposed for operating at Power Factors

below 0.85 (voltage lagging the current). In specific situations there is also a Power Factor

penalty for operating above 1.00 (voltage leading the current).

(e) kW = Real Power required to do work = current X voltage X PF (cos A)

(f) kVA = Apparent Power = current X voltage

(g) RkVA = Power that performs no work = current X voltage X sin A

(h) PF = Ratio of Real Power to Apparent Power = the kW divided by the kVA

SELF-CONTAINED METERING:

Electrical service sizes of “400A & below” are metered with Self-contained Metering, which means

that all associated hardware (PT’s and/or CT’s) is self-contained within the meter housing. The

meter “class designation” (CL) denotes the maximum of the load range in amperes. KUB uses the

CL200 (Form 16S) 120V self-contained meter for 4-wire, 208Y/120V, 60A through 400A services;

and for 4-wire, 480Y/277V, 60A through 400A services. The customer is responsible for furnishing

and installing the meter base (to KUB specifications), and must have this installation inspected by

the electrical inspector before KUB installs the meter.

All self-contained metering of 480Y/277V services must have a (KUB-approved) means of

disconnect ahead of the meter to facilitate the removal or replacement of the meter without

endangering metering personnel.

Many shopping centers have a series of self-contained meters feeding from a single bus. These

meters should be clustered in one general location as close as possible to the main disconnect. No

means of individual disconnect is required between the bus and meters except for the 480V bus.

This metering is normally installed on the outside wall of one of the businesses. For ease of meter

reading and access as well as to deter tampering, meter installations on inside walls should be

avoided.

The 2 preferred locations for permanent self-contained 3-phase 4-wire meters are as follows in

order of preference: (1) The outside wall of customer’s building near to transformer. (2) The

customers metering pole or pedestal near to transformer. KUB’s Field Marketing Representative

must approve all meter locations.

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-10

TRANSFORMER-RATED METERING:

Electrical service sizes “greater than 400A” will be metered with appropriately-sized CT’s (Current

Transformers). KUB has standardized on 3 basic sizes of CT’s -- each with a minimum of 3

thermal ratings. These thermal ratings give each CT an extended range of 3 times its normal

current rating.

KUB’s 3 Current Transformer sizes are: 300 / 5A (up to 900A maximum)

600 / 5A (up to 1800A maximum)

1500 / 5A (up to 4500A maximum)

There are 2 styles of Current Transformers: PDMO (for pad-mounted transformer mounting)

PLMO (for pole & other mountings)

Potential Transformer (PT) utilization provides greater safety to electricians & meter-reading

personnel. KUB’s Potential Transformer size is 2.4/1 (or 288V/120V) for 480Y/277V services

greater than 400 amperes. No additional PT’s or CT’s are needed for Self-contained 480Y/277V

metering.

The 2 preferred locations for a permanent transformer-rated 3-phase 4-wire meter are as follows in

order of preference: (1) For PMT service, locate meter on the outside wall of the pad-mounted

transformer with PT’s and/or CT’s mounted inside the PMT. For an overhead transformer-bank

service, locate meter on the transformer pole with PT’s and or CT’s mounted below the

transformers. (2) For PMT service, locate meter on outside wall of customers building with PT’s

and/or CT’s mounted inside customers cabinet next to meter. For an overhead transformer-bank

service, locate the meter on the outside wall of customers building with PT’s & CT’s the service

mast, which must extend high enough above roof (out of reach of unauthorized personnel).

DOWNTOWN NETWORK METERING:

In the downtown area, there is a networking of secondary conductors between transformers in other

vaults to provide greater service reliability to many customers during primary cable and/or

transformer failures.

Because the network system services are not easily cleared or isolated, KUB requires the

customer to install a (KUB-approved) means of disconnect ahead of the meter and metering

CT’s. This enables KUB personnel to remove and replace the metering without requiring a major

clearance on the downtown network system. The exception to this disconnect requirement is what

KUB refers to as a “Spot Network”, where secondary conductors are only networked together with

other transformers within the same vault to provide a more reliable service to a particular customer.

For any commercial three-phase service with an estimated “demand” of “50kW (kilowatts) or

greater”, KUB will install an electronic meter with demand register. The “demand” of a service is

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-11

the amount of power delivered averaged over a specified interval of time. The most common

specified time interval used in commercial demand metering is 30 minutes.

See the following standard drawings for transformer-rated meter mountings and three-phase

4-wire meter wiring diagrams:

16210-MTRMT (Meter Mountings for Transformer-Rated Meters 1PH & 3PH)

16210-Z1F08 (Meter Wiring for 208Y/120V, 3PH, 4W, 200A & Below Service) PMT & OHT

16210-N1F21 (Meter Wiring for 208Y/120V, 3PH, 4W, 400A Service) PMT & OHT

16210-Z1FX (Meter Wiring for 208Y/120V, 3PH, 4W, CT-Rated Service) PMT

16210-Z1FX (Meter Wiring for 208Y/120V, 3PH, 4W, CT-Rated Service) OHT

16210-Z3F08 (Meter Wiring for 480Y/277V, 3PH, 4W, 200A & Below Service) PMT & OHT

16210-N3F21 (Meter Wiring for 480Y/277V, 3PH, 4W, 400A Service) PMT & OHT

16210-Z3FX (Meter Wiring for 480Y/277V, 3PH, 4W, CT & PT-Rated Service) PMT

16210-Z3FX (Meter Wiring for 480Y/277V, 3PH, 4W, CT & PT-Rated Service) OHT

16210-R6FX (Meter Wiring for 4160Y/2400V, 3PH, 4W, CT& PT-Rated Service)

16210-R7FX (Meter Wiring for 69000V, 3PH, 4W, CT & PT-Rated Service)

16210-R8FX (Meter Wiring for 13200Y/7620V, 3PH, 4W, CT & PT-Rated Service)

FOR ELECTRIC METER CODES, SEE PAGE 16210-2.

THREE-PHASE METER APPLICATION GUIDE

Service Main Sw Est kVA Meter CT Amp Meter

Voltage Amperes Load Base Ratio Type Notes

208Y/120V 60 -- 60A -- Z1F08 (A)

4W, 3PH 100 -- 100A -- Z1F08 (A)

200 -- 200A -- Z1F08 (A)

320 -- 320A -- N1F10 (A)

600-800 -- CT 300/5 Z1F20 (B)

1000-1600 <324 CT 300/5 Z1F20 (B)

1000-1600 >324 CT 600/5 Z1F24 (B)

2000 -- CT 600/5 Z1F24 (B)

2500 <648 CT 600/5 Z1F24 (B)

2500 >648 CT 1500/5 R1F28 (B) (C)

3000 -- CT 1500/5 R1F28 (B) (C)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-12

4000 -- CT 1500/5 R1F28 (B) (C)

480Y/277V 100 -- 100A -- Z3F08 (A)

4W, 3PH 200 -- 200A -- Z3F08 (A)

320-400 -- 400A -- N3F10 (A)

600 -- CT 300/5 Z3F20 (B)

800 -- CT 300/5 Z3F20 (B)

1000-2000 <748 CT 300/5 Z3F20 (B)

1000-2000 >748 CT 600/5 R3F24 (B) (C)

2500 <1498 CT 600/5 R3F24 (B) (C)

2500 >1498 CT 1500/5 R3F28 (B) (C)

3000 -- CT 1500/5 R3F28 (B) (C)

4000 -- CT 1500/5 R3F28 (B) (C)

ALL ABOVE SERVICES HAVE A GROUNDED CONDUCTOR.

Notes:

(A) Customer to supply socket-type meter base to meet or exceed size shown. Customer to

supply disconnect switch ahead of meter base for all 480V non-CT services. PT’s are

self-contained in meter housing for these 480Y/277V services.

(B) KUB to supply all CT-type meter bases. The preferred location for CT-type meter base is

on (or near) KUB facilities. Specify “R” instead of ”Z” if reactive metering is required or

if demand is greater than 500kW.

(C) Customer to supply phone connection within 12 inches of all “R” meters. No dedicated

phone line is required, since an extension phone line is adequate for KUB’s MV-90 Remote

Reading Module.

See the following standard drawings for other large service meter diagrams:

16210-PG9S (Meter Wiring for Pulses to Customer)

16210-HOSP (Meter Wiring for Hospital Services)

16210-TXFX (ESP Meter Wiring for TVA Potential & Currents)

16210-TXFX1 (ESP Meter Wiring for TVA Slave #1 Phone & Data)

16210-TXFX2 (ESP Meter Wiring for TVA Slave #2 Phone & Data)

16210-TXFXM (ESP Meter Wiring for TVA Master Phone & Data)

16210-TXFXX (ESP Meter Wiring for TVA W/O Slave Phone & Data)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-13

Figure 1 Meter Connection H1K08 (Class 200) 120V 1PH PMT & OHT Service 16210-H1K08

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-14

Figure 2 Meter Connection Hospital Service 16210-HOSP

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-15

Figure 3 Meter Connection J2E08 (Class 200) 120V/240V 1PH PMT & OH Service 16210-J2E08

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-16

Figure 4 Meter Connection K1F21 (Class 480) 208V GrdY/120V 3PH PMT & OH Service 16210-K1F21

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-17

Figure 5 Meter Connection K2C21 (Class 480) 240V DELTA 3PH OHT Service 16210-K2C21

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-18

Figure 6 Meter Connection K2E21 (Class 480) 120V/240V 1PH PMT & OH Service 16210-K2E21

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-19

Figure 7 Meter Connection K3F21 (Class 480) 480V GrdY/277V 3PH PMT & OH Service 16210-K3F21

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-20

Figure 8 Meter Connection K4C21 (Class 480) 480V DELTA Volts 3PH OHT Service 16210-K4C21

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-21

Figure 9 Transformer – Rated Meter Mountings 16210-MTRMT

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-22

Figure 10 Meter Connection (Class 20) Form 9S. Pulses to Customer 16210-PG95

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-23

Figure 11 Meter Connection R6FX (Class 20) 4.16kV GrdY/2.4kV Primary on Pole 16210-R6FX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-24

Figure 12 Meter Connection R7FX (Class 20) 69kV Subtransmission on Structure 16210-R7FX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-25

Figure 13 Meter Connection R8FX (Class 20) 13.2kVGrdY/7.62kV Par. Pri. In Cubicle 16210-R8FX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-26

Figure 14 Meter Connection R8FXE (Class 20) 13.2kVGrdY/7,62kV 200A Pri. In Enclosure 16210-R8FXE

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-27

Figure 15 Meter Connection R8FXP (Class 20) 13.2kVGrdY/7.62kV Primary on Pole 16210-R8FXP

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-28

Figure 16 Preferred Standard Residential Meter Location 16210-RLOC

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-29

Figure 17 Meter Connection Drawing Symbols 16210-SYMB

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-30

Figure 18 ESP Meter Connection TXFX (Class 20) TVA Potential & Currents 16210-TXFX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-31

Figure 19 ESP Meter Connection TXFX (Class 20) TVA Slave No. 1 Phone & Data 16210-TXFX1

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-32

Figure 20 ESP Meter Connection TXFX (Class 20) TVA Slave No. 2 Phone & Data 16210-TXFX2

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-33

Figure 21 ESP Meter Connection TXFX (Class 20) TVA Master Phone & Data 16210-TXFXM

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-34

Figure 22 ESP Meter Connection TXFX (Class 20) TVA Slave No. 2 Phone & Data 16210-TXFXX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-35

Figure 23 Meter Connection Z1H08 (Class 200) 120V/208V (NW) 1PH PMT & OHT Service 16210-Z1H08

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-36

Figure 24 Meter Connection Z2EX (Class 20) 120V/240V 1PH OHT Service 16210-Z2EX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-37

Figure 25 Meter Connection Z8KX (Class 20) 7.62kV 1PH OH Primary Service 16210-TXFX2

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-38

Figure 26 Meter Connection Z2EX (Class 20) 120V/240V 1PH OHT Service 16210-Z2EX (OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-39

Figure 27 Meter Connection Z(R)4CX (Class 20) 480V DELTA 3PH OHT Service 16210-Z4CX (OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-40

Figure 28 Meter Connection Z(R)1FX (Class 20) 208V GrdY/120V 3PH PMT Service 16210-Z1FX (PMT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-41

Figure 29 Meter Connection Z(R)1FX (Class 20) 208V GrdY/120V 3PH PMT Service 16210-Z1FX (OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-42

Figure 30 Meter Connection Z1F08 (Class 200) 208V GrdY/120V 3PH PMT Service 16210-Z1FX (PMT &

OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-43

Figure 31 Meter Connection Z2C08 (Class 200) 208V GrdY/120V 3PH PMT Service 16210-Z1FX (PMT &

OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-44

Figure 32 Meter Connection Z2F08 (Class 200) 240V DELTA VOLTS 3PH OHT Service 16210-Z3F08 (PMT

& OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-45

Figure 32 Meter Connection Z4C08 (Class 200) 480V DELTA 3PH OHT Service 16210-Z4C08

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-46

Figure 33 Meter Connection Z2G08 (Class 200) 240V DELTA/120V 3PH OHT Service 16210-Z2G08

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-47

Figure 34 Meter Connection Z2GX (Class 20) 240V DELTA/120V 3PH OHT Service 16210-Z2GX

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-48

Figure 34 Meter Connection Z1FX (Class 20) 208V GrdY/120V 3PH OHT Service 16210-Z3FX (OHT)

KNOXVILLE UTILITIES BOARD

STANDARDS AND SPECIFICATIONS

Released XX.XX.XX Electric Metering 16210-49

Figure 34 Meter Connection Z3FX (Class 20) 480V GrdY/277V 3PH PMT Service 16210-Z3FX (PMT)

END OF SECTION