Date Code 20090730 Instruction Manual SEL-734 Meter
Glossary
a Output
A meter control output that closes when the output meter asserts.
b Output
A meter control output that opens when the output meter asserts.
c Contact
A breaker auxiliary contact that can be set to serve either as an a contact or as
a b contact.
A
Abbreviation for amps or amperes; unit of electrical current flow.
Acceptance Testing
Testing that confirms that the meter meets published critical performance
specifications and requirements of the intended application. Such testing
involves accuracy testing and logic functions when qualifying a meter model
for use on the utility system.
Access Level
A meter command level with a specified set of meter information and
commands. Except for Access Level 0, you must have the correct password to
enter an access level.
Access Level 0
The least secure and most limited access level. No password protects this
level. From this level, you must enter a password to go to a higher level.
Access Level 1
A meter command level you use to monitor (view) meter information. The
default access level for the meter front panel.
Access Level E
A meter command level you use for Access Level 1 functions and resetting of
peak demand, max/mins, crest factors, and load profile. This access level is for
the meter reader.
Access Level 2
The most secure access level where you have total meter functionality and
control of all settings types.
ACSELERATOR
QuickSet
®
SEL-5030 Software
A Windows
®
-based program that simplifies settings and provides analysis
support.
Analog Quantities
Variables represented by such fluctuating measurable quantities as frequency,
current, and voltage.
AND Operator
Logical AND. An operator in Boolean SELOGIC
®
control equations that
requires fulfillment of conditions on both sides of the operator before the
equation is true.
Anti-Aliasing Filter
A low pass filter that blocks frequencies too high for the given sampling rate
to accurately reproduce.
Apparent Power (S)
Complex power expressed in units of volt-amps (VA). Accounts for both real
(P) and reactive (Q) power dissipated in a circuit: S = P + jQ. This is power at
the fundamental frequency only; no harmonics are included in this quantity.
ASCII
Abbreviation for American Standard Code for Information Interchange.
Defines a standard set of text characters. The SEL-734 uses ASCII text
characters to communicate using front-panel and rear-panel EIA-232 serial
ports on the meter and through virtual serial ports.
Courtesy of NationalSwitchgear.com
To Next Page
Loading...
