Schweitzer Engineering Laboratories SEL-701, Инструкция по эксплуатации

Страница: 117 / 468

Date Code 20010719
701 Motor Protection Relay
Settings Calculation
Sequential Events Recorder (SER) Settings
4.53
The SEL-701 Relay SER function provides four list settings to define the
conditions that add records to the SER memory: SER1, SER2, SER3, and SER4. You
can set the relay to monitor up to 96 conditions. Each list can contain up to 24 items.
Each item must be the name of a Relay Word bit whose definitions are shown in
Table B.4 on page B.30 in Appendix B: SELogic® Control Equations & Relay Logic .
The factory default SER settings are shown in Table 4.41 on page 4.52 .
For convenience, and because you may not need to make any changes to the
factory default settings above, the definitions of the Relay Word bits used in the factory
default SER settings are shown in
Table 4.42 .
Table 4.42 Default SER Trigger Setting Relay Word Bits Definitions
Table 4.42 Default SER Trigger Setting Relay Word Bits Definitions
Relay Word Bits Relay Word Bit Definitions
IN1, IN2, IN3,
IN4, IN5, IN6,
IN7 Represent the state of contact inputs IN1–IN7, respectively. Assert
(Logical 1) when the input detects that the contact connected to it
is closed. Contact input IN7 is located on the SEL-2600 RTD
Module.
STARTING,
RUNNING,
STOPPED Represent the states of the protected motor.
JAMTRIP Load Jam Trip. Asserts when the relay trips in response to a load
jam condition, as defined by that function. This Relay Word bit is
inactive if the load jam function is disabled.
LOSSALRM,
LOSSTRIP
Load Loss Alarm and Load Loss Trip.
Assert when the relay
issues an alarm or trip in response to a load loss condition, as
defined by that function. These Relay Word bits are inactive if the
load loss function is disabled.
46UBA, 46UBT Phase Current Unbalance Alarm (46UBA) and Trip (46UBT).
Assert when the relay issues an alarm or trip in response to a
current unbalance condition, as defined by that function. These
Relay Word bits are inactive if the current unbalance function is
disabled.
49A, 49T Thermal Alarm and Trip. Assert when the relay issues a thermal
element alarm or trip due to locked rotor or running overload
conditions.
47T Phase Reversal Trip. Asserts when the relay detects a phase
reversal condition if phase reversal tripping is enabled by the relay
settings.
SPEEDSW,
SPDSTR Speed Switch Input and Trip. SPEEDSW asserts when the speed
switch input is asserted. SPDSTR asserts when the relay does not
detect a speed switch contact closure within a settable time from
the beginning of a motor start if the function is enabled by the
relay settings.
TRIP, OUT1,
OUT2, OUT3 Represent the states of the contact outputs.
(Continued)