1730SLASHBASIC datasheet(2/6 Pages) FLUKE

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Fluke 1730 Three-Phase Electrical Energy Logger

Applications

Load studies

Discover how much energy individual pieces of

equipment are consuming when they are operat-

ing at minimum and maximum capacity. Check

capacity of circuits prior to adding additional

loads (various standards exist for this process;

in the US the NEC 220-87 is the recommended

standard). Load studies can also identify situations

where you may be exceeding the allowable load

on the circuit or when an agreed peak demand

applies from the utility. For convenience, some

load studies simply measure current which makes

installation of the measuring equipment quick and

easy. It is often recommended that load surveys

be performed for 30 days so that all typical load

conditions are encountered during the test.

Energy surveys

Users often ask where measurements should be

taken for an energy survey. The answer is mul-

tiple points within the facility. Start at the main

service feeders; compare the power and energy

measured here with the readings from the util-

ity meter to ensure you’re receiving the correct

charges. Then move downstream to the larger

loads; these should be easy to identify by the cur-

rent rating of the electrical panels downstream of

the service entrances. Measuring at many points

will allow a full picture of energy usage across

the facility to be developed. The next ques-

tion users typically have is how long an energy

survey should last. This of course depends on the

facility, but it is recommended that you measure

for a period that matches a typical facility activ-

ity period. If the facility operates over a five day

work week with down time on the weekend, a

seven day survey will most likely capture typical

conditions. If the facility operates at a constant

level for 24 hours a day, 365 days a year, a single

day could be reasonably representative as long as

you avoid a period where there may be planned

maintenance.

To capture a full picture of the facilities energy

usage it is not necessarily required to have

measurements made simultaneously at every

consumption point in the facility. To get a compre-

hensive picture, spot measurements can be made

and then compared on a sliding time timescale.

For example, you could compare the service

entrance results from a typical Tuesday between

6:00 am and 12:00 pm with those of a larger load

in the facility. Typically there will be some cor-

relation between these profiles.

Power and energy logging

When a piece of equipment is operated it instan-

taneously consumes a specific amount of power in

watts (W) or kilowatts (kW). This power is accu-

mulated over the operating time and expressed as

energy consumed in kilowatt hours (kWh). Energy

is what your electric utility charges for; there will

be a standard charge from the utility per kilowatt

hour. Utilities may have other additional charges,

such as peak demand, which is the maximum

power demand over a defined period of time,

often 15 or 30 minutes. There may also be power

factor charges, which are based on the effects of

the inductive or capacitive loads in the facility.

Optimizing peak demand and power factor often

results in lower monthly electricity bills. The

1730 Three Phase Electrical Energy logger has

the capability to measure and characterize these

effects enabling you to analyze the results and

save money.

Simplified load studies

For situations where it’s either difficult or imprac-

tical to make a voltage connection the simple load

study feature allows users to perform a simplified

load study by measuring current only. The user

can enter the nominal expected voltage to create

a simulated power study. For accurate power

and energy studies it is required to monitor both

voltage and current but this simplified method is

useful in certain circumstances.

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