SIMPRO-100
Glossary
PRIM-2400C
235
RTD
Abbreviation for Resistance Temperature
Device. An RTD is made of a metal having a
precisely known resistance and temperature
coefficient of resistance. The SIMPRO-100
Relay and SIMPRO-100-RTD External
Module can measure the resistance of the
RTD, and thus, determine the temperature at
the RTD location. Typically embedded in the
motor windings or attached to the races of
bearings.
S
Self-Test
A function that verifies the correct operation of
a critical device subsystem and indicates if an
out-of-tolerance condition is detected. The
SIMPRO-100 Relay is equipped with
self-tests that validate the relay power supply,
microprocessor, memory, and other critical
systems.
Sequential Events Recorder (SER)
A relay function that stores a record of the
date and time of each assertion and
deassertion of every Relay Word bit in a user
settable list. Provides a useful way to
determine the order and timing of events
following a relay operation.
SER
Abbreviation for Sequential Events Recorder
or the relay serial port command to request a
report of the latest 512 sequential events.
Speed Switch
An electrical contact that closes to indicate
that a motor speed exceeds a certain value.
T
Terminal Emulation Software
Personal computer (PC) software that can be
used to send and receive ASCII text
messages via the PC serial port, such as
Microsoft‚ Hyperterminal‰ä or ProComm
Plus‰.
U
Underfrequency Element
A protection element that causes the relay to
trip when the measured electrical system
frequency is less than a user settable
frequency.
Underpower Element
A protection element that causes the relay to
trip when the measured electrical power
consumed by a motor is less than a user
settable value.
V
VA, VB, VC
Measured A-, B-, and C-phase-to-neutral
voltages.
VAB, VBC, VCA
Measured or calculated phase-to-phase
voltages.
VFD
Abbreviation for Vacuum Fluorescent Display.
Used as the relay front-panel alphanumeric
display.
VG
Residual voltage calculated from the sum of
the three phase-to-neutral voltages, if
connected.
VT
Abbreviation for voltage transformer. Also
referred to as a potential transformer or PT.
Summary of Contents for SIMPRO-100
Page 1: ...SIMPRO 100 Motor Protection Relay Instruction Manual Document No PRIM 2400C ...
Page 12: ...Contents SIMPRO 100 x PRIM 2400C ...
Page 16: ...Contents SIMPRO 100 xiv PRIM 2400C ...
Page 42: ...3 SIMPRO PC Software SIMPRO 100 40 PRIM 2400C ...
Page 100: ...6 ASCII Serial Port Operation SIMPRO 100 98 PRIM 2400C ...
Page 127: ...SIMPRO 100 Event Analysis 9 PRIM 2400C 125 Figure 9 2 Example SER Report ...
Page 136: ...10 Maintenance Troubleshooting SIMPRO 100 134 PRIM 2400C ...
Page 138: ...A Firmware Versions SIMPRO 100 136 PRIM 2400C ...
Page 206: ...D SIMPRO PC Compatibility Features SIMPRO 100 204 PRIM 2400C ...
Page 214: ...E Motor Thermal Element SIMPRO 100 212 PRIM 2400C ...
Page 230: ...F SIMPRO 100 Relay Settings Sheets SIMPRO 100 228 PRIM 2400C ...
Page 239: ......