Meter Technician Training

Overview

This program will train personnel to maintain, calibrate, install, and troubleshoot various power measuring devices.

Who Benefits:

Meter technicians, trainers, inspectors, maintenance staff, the company, and its customers.

Language Availability:

English

Format:

• Video

Video Support Material:

Reproducible student workbook available with each module.

Program Segments

0701 Review of Electrical Fundamentals (1)

Ohm's law; power and energy; ac voltage generation; ac power in resistive circuits; voltage, current, and power waveforms; peak vs. rms values; effects of inductance and capacitance; power factor; active, reactive, and apparent power; construction of power triangle.

0702 Review of Electrical Fundamentals (2)

Impedance, voltage & power triangles; power factor correction; impedance calculations; voltage drop calculations; 3-phase circuits; wye and delta connections; balanced vs. unbalanced operation; voltage, current, and power relationships in 3-phase systems.

0703 The Watt-Hour Meter

Single and 3-phase construction; mechanical operation; the register ratio; electrical operation; power factor; adjustment for full load, light load, and power factor.

0704 Calibration of Single-Phase Meters

Operation and use of the rotating standard; inspection and maintenance procedures; adjustment & calibration; creep, dial & accuracy tests; internal connections; test boards; statutory regulations; type approvals.

0705 Calibration of 3-Phase Meters & Sample Testing

Testing network and polyphase meters; purpose; test requirements; group and sample selection; triangle graph; outliers; test result calculations; mean and standard deviation; size and acceptance criteria.

0706 Single-Phase Self-Contained Meter Installation

Single-phase 2 & 3-wire meters; diagrams and operation; load current flow; neutral current flow; power measurement; changing an `a' and `s' base meter; voltage checks; troubleshooting; use and inspection of safety equipment, installation.

0707 Single-Phase Transformer Type Meters

Instrument transformer operation; window and bar type current transformers; potential transformers; additive and subtractive polarity; polarity checks; safety procedures; accuracy class and interpretation; billing multipliers; 2 and 3-wire transformer type meter operation; load current flow; power measurement; installation, connection, verification. (59 minutes)

0708 Thermal Demand Meter Operation & Calibration

Explains why demand measurement is used; operation of thermal demand meter; adjustments; testing and calibration; response time; pull back test; grease memory test; light load test; zero test.

0709 Integrating and Rectithermal Demand Meter Operation and Calibration

Indicating cumulative; single & poly-phase types; construction; mechanical operation; response; maintenance; calibration requirements; test points; adjustment; rectification; single-phase test constant; single-phase testing 3-phase 3-wire va meter; single-phase testing 3-phase 4-wire va meter; rectithermal testing precautions; form factors; test va calculations.

0710 Vector Analysis Delta Connections

3-phase generation, operation & configuration; phase rotation; vectors; parallelogram, triangle & compass methods of vector addition; rotating vectors; properties of triangles; right triangles; problem solving; delta connected generators; delta phasors; current in delta system; delta connected transformers; 3-phase power; power and impedance triangles.

0711 Metering 3-Phase Delta Systems

Reviews Blondel's theorem; meter phasors; power measurement (two wattmeter method); coil polarity; installation and testing; preparing meter panel.

0712 Metering 4-Wire Systems

Reviews wye connected generators; current; voltage; loads; transformer connections; power; phasors; problems; metering with 3 wattmeters; the 2-1/2 element meter; metering with the 2-element meter and the 3-wire single-phase meter.

0713 Network Services; Measuring VARS & VA

Explains how network service (208/120v) systems work and how they are metered; how vars and va can be measured utilizing a phase shifting transformer or by using rectithermal meters; the difference between va using phasor addition and using arithmetic addition.

0714 Polyphase Installation Verification

Verification of proper meter installation; cross phase analysis and how it is applied to completely verify: a 2-element meter on a 3-wire delta system, a 2-1/2 element meter on a 4-wire wye system, a 2-element meter on a 4-wire wye system with current transformers (cts) connected in delta; also shows how unbalanced loads effect 3 and 4-wire metering and their phasor diagrams.

0715 Troubleshooting Polyphase Installations and Power Theft

Discusses all types of polyphase installations, analysis and operation under fault conditions and troubleshooting situations. Topics covered include: delta delta, delta wye, wye delta, and wye wye; the floating neutral; open delta; ground fault indicators; various power theft situations; open meter neutral; reversed current coils.

0716 Specialized Metering

Primary metering; thermal converters; transducers; recording graphic meters; methods of totalizing meters. Also covered are: construction; operation; adjustments; testing and calibration.

0717 Power Factor Correction and Load Factor

Capacitor banks and power factor correction: why and where needed; sizing; voltage rise calculation; safety precautions; released system capacity; improved voltage levels; reduced power losses; load factor.

0718 Digital Metering (1)

Review of standard metering practices; Q-hour metering; digital metering basics; magnetic tape systems and translation; remote retrieval systems and translation.

0719 Digital Metering (2)

Methods of totalizing; installation design; troubleshooting and maintenance procedures; electronic metering; future development and needs.

0720 Dealing With The Customer

Customer relations: costs and benefits; principles, procedures and practices for dealing with difficult customers and collection situations; current limiters: purpose, types installation, application; billing complaints and disputed meters: estimating customer usage; procedures for determining if a meter is at fault; testing a disputed meter; ground fault conditions.