Take a look at different meter configurations, and be sure to watch the presentation for a further look into how these work and to hear what other industry professionals have to say.

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Today’s session will begin shortly
@tescometering
@TESCO_Metering
TESCO -The Eastern Specialty Company
TESCO -The Eastern Specialty Company
TESCO
Tuesdays

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Prepared by Kevin Farrell
for TESCO Tuesdays
as adapted from SWEMA Meter School
February 2, 2021
Metering Configurations

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Presentation Outline
 Various form type nomenclatures used in today’s electric metering
industry
 Investigating differences between form types
 Standard transformer service wiring configurations
 Typical form types for standard transformer services

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Various Form Types
1S Class 200
2S Class 200
2SE Class 320
2K Class 400, 480
2A Class 200
3S Class 10, 20
4S Class 10, 20
5S Class 20
45S Class 20
45A Class 20
6S Class 20
36S Class 20
36A Class 20
8S Class 20
8A Class 20
9S Class 200
9A Class 10, 20
8/9S Class 20
10A Class 20
12S Class 200
12SE Class 320
12K Class 480
14S Class 200
15S Class 200
16S Class 200
15/16S Class 200
15/16SE Class 320
15/16K Class 480
27K Class 480
9H (Switchboard) Class 10, 20

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Digital Nameplate
Form number listed on
most nameplates.

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Digital Nameplate

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Digital Nameplate

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Digital Nameplate

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Digital Nameplate

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Mechanical Nameplate

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Mechanical Nameplate

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Form 2S Meter

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Form 2S
120/240v or 240/480v
Single Phase
Three-Wire Service
Self Contained

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Form 2S System

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Form 3S Nameplate

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Form 3S Backplate
3 1
2
4
5

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Form 3S
120/240v Single Phase
Three-Wire Service
CT Rated

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Form 3S System Diagram

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Form 4S Nameplate

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Form 4S Backplate
3 1
5
2
4
6

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Form 4S
120/240v
Single Phase
Three-Wire Service
CT Rated

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Form 4S System

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Form 5S Nameplate

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Form 5S Backplate

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Form 5S
120v, 240v, 480v Three Phase
Three Wire
Delta or Network Service
CT Rated

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Measurement of Energy on a Three-Phase, Three-
Wire Delta Service, Form 5S with CTs & VTs

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Measurement of Energy on a Network, Three-
Wire Service, 120/208v, Form 5S

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Form 6S Nameplate

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Form 36S Nameplate

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Form 6S (36S/46S) Backplate

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Form 6S (36S/46S)
120/208v, 277/480v
Three Phase
Four Wire
Wye Service
2 ½ Stator CT Rated

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Measurement of Energy on a Three-Phase,
Four-Wire Wye Service, Form 6S, CTs & VTs

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Form 8S Nameplate

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Form 8S
120/240v
Three Phase
Four-Wire Delta Service
CT Rated

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Measurement of Energy on a Three-Phase,
Four-Wire Delta Service, Form 8S with CTs

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Form 8/9S Nameplate

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Form 8, 9, 8/9S Backplate

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Which One is 9S and Which One is 6S?
9S
6S
6S
9S

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Form 9S, 8/9S
120/208v, 277/480v
Three Phase
Four-Wire Wye Service
CT Rated

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Measurement of Energy on a Three-Phase
Four-Wire Wye Service, Form 9S, with CTs

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Measurement of Energy on a Three-Phase Four-
Wire Wye Service, Form 9S, with CTs & VTs

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Form 12S Meter

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Form 12S Backplate

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Form 12S
120v, 240v or 480v
Three Phase
Three-Wire or Single-Phase
Network Service
Self Contained

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Measurement of Energy on a Three-Phase
Three-Wire Service, Form 12S, Self-Contained

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Single-Phase, Three-Wire Measurement of Energy on a
Three-Phase, Four-Wire Wye Service, Form 12S Self-
Contained (Network)

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Form 15/16S Nameplate

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15/16S Backplate

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Form 15/16S
120/208Y, 277/480Y or 120/240 Delta
Three Phase
Four-Wire Service
Self-Contained

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Measurement of Energy on a Three-Phase, Four-
Wire Delta Service, Form 15S, Self-Contained

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Measurement of Energy on a Three-Phase, Four-
Wire Wye Service, Form 16S, Self-Contained

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Form 2S Class 320

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Form 16/16K Nameplate

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Form 15/16K Meter
Bolt on Terminals

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Form 15/16K Backplate

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Form 15/16K
120/208Y, 277/480Y or 120/240 Delta
480 Amp
Self-Contained

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Questions and Discussion
Kevin Farrell
Texas Regional Sales Manager
SWEMA member
kevin.farrell@tescometering.com
TESCO – The Eastern Specialty Company
Bristol, PA
215-228-0500
This presentation can also be found under Meter Conferences and
Schools on the TESCO website: www.tescometering.com.
ISO 9001:2015 Certified Quality Company
ISO 17025:2017 Accredited Laboratory

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Thanks for tuning in!
See you at the next session.
Upcoming Session:
Metering Configurations
February 2, 2021 | 11:00 AM Eastern
**TESCO Users Group: July 18-21, 2021**
Presentation Date
Metering Forms 2/9
Test Switch Operations and Hot Sockets 2/16
Meter Testing in the Field 2/23
Transformer-Rated Testing Using Pickups and Probes 3/2
Traditional Ratio, Burden, Admittance and Demag Testing – Part 1 3/9
Traditional Ratio, Burden, Admittance and Demag Testing – Part 2 3/16
Realizing Your Investment in Technology Through Analytics 3/23
Shop Testing 3/30
Preparing for AMI Deployment 4/6
Communication Equipment 4/13
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