Metering

Question 1

what kind of meter has the capability to have all load current for the service flowing through it at rated service voltage?

Answer 1

self contained

Question 2

what are the four types of self contained meters?

Answer 2

polyphase demand
single phase solid state
single phase electromechanical
polyphase electromechanical

Question 3

self contained meters are limited to _____ volts and ______ amps or less.

Answer 3

600/400

Question 4

one current coil and one potential coil working together to turn one disk are parts to a _____________ meter?

Answer 4

electromechanical

Question 5

what kind of meter has no moving parts?

Answer 5

solid state

Question 6

the number of watt hours per one rotation of the disk is called the?

Answer 6

Kh constant

Question 7

a disk on an electromechanical meter does not rotate once for every ___ _____ consumed?

Answer 7

watt hour

Question 8

a number that represents the ratio between the register gear train and the value registered on the meter dial.

Answer 8

Kr constant

Question 9

in the absence of a rotating disk, a solid state meter uses a ___ ______ to determine watt hours

Answer 9

pulse recorder

Question 10

poly phase also means ?

Answer 10

three phase

Question 11

the most common service in the united states is?

Answer 11

three wire- 120/240 V single phase

Question 12

three wire- 120/240 V single phase service takes what kind of meter?

Answer 12

a three wire meter

Question 13

testing should be done at the meter base to ensure there is no ?

Answer 13

short circuit
heavy load
back feed

Question 14

when removing and installing meters, always follow?

Answer 14

your company’s procedures

Question 15

never remove a meter with more than _______ Kw of instantaneous load.

Answer 15

10

Question 16

how can you find the instantaneous load?

Answer 16

kw=3.6 x kh x revolutions or pulses/seconds

Question 17

theft of power when a consumer manipulates or bypasses the meter installation

Answer 17

energy diversion

Question 18

what is used when the voltage and or current are too high for self contained metering?

Answer 18

transformer rated metering

Question 19

voltage transformers are also called?

Answer 19

potential transformers

Question 20

pts and cts are also refered to as?

Answer 20

instrument transformers

Question 21

how is a voltage transformer different from other transformers?

Answer 21

it does not need to carry any load

Question 22

when there is current flowing through the current transformer while the meter is not installed, the secondary must be kept _____ _______.

Answer 22

short circuited

Question 23

transformer rated meters typically utilize a ?

Answer 23

test switch

Question 24

customers are billed for power consumed and the meter reads at a reduced reading. what is used to compensate for this reduction?

Answer 24

power multiplier

Question 25

AMR (automated meter reading) allows utilities to to?

Answer 25

remotely collect data

Question 26

allows for the removal and testing of the meter without opening the secondary circuit from the current transformer

Answer 26

test switch

Question 27

one way communication tech that allows utilities to remotely collect data.

Answer 27

AMR (automated meter reading)

Question 28

two way communication tech that allows utilities to remotely collect meter data and customers to review and manage usage in real time.

Answer 28

AMI (advanced metering infrastructure)

Question 29

communication software that communicates with the meters to send or receive information.

Answer 29

head-end software

Question 30

communication system that carries the data between the meter and the head-end software.

Answer 30

network

Question 31

a network where data travels by radio frequency from one meter to another meter until the information reaches its destination.

Answer 31

radio frequency mesh

Question 32

a network where data travels over existing power lines to send information to the head end software or the meter

Answer 32

power line carrier

Question 33

a network similar to RF mesh because it uses a radio frequency, but the meters communicate directly to a collector instead of reading from meter to meter.

Answer 33

wide area network

Question 34

hardware needed for the network to communicate to the head-end software and the meter

Answer 34

network infrastructure

Question 35

devices installed at the customer's location that are used to communicate information to the customer and the utility

Answer 35

end points