Schweitzer Engineering Laboratories SEL-701 - Table B.2 Relay Word Bit Definitions for SEL-701

Date Code 20010719 701 Motor Protection Relay
SELOGIC
®
Control Equations & Relay Logic
Relay Word Bits
B.5
Table B.2 Relay Wo rd Bit Definitions for SEL-701
Table B.2 Relay Word Bit Definitions for SEL-701
Row Bit Definition
STARTING
Asserts when protected motor is starting (current is greater
than 2.5 times motor rated full load current).
RUNNING Asserts when motor is running.
STOPPED
Asserts when motor is stopped (current is less than 10% of
motor rated full load current).
JAMTRIP Load-Jam Trip.
LOSSALRM
LOSSTRIP
Load-Loss Alarm and Load-Loss Trip. Assert when the relay
detects a load-loss as defined by that function and its settings.
These Relay Word bits are inactive if the function is disabled
by relay settings.
1
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 and
its settings.
49A
49T
Thermal Alarm (49A) and Trip (49T). Assert when the relay
issues a thermal element alarm or trip due to locked rotor
starting or running overload conditions.
THERMLO
NOSLO
TBSLO
ABSLO
Motor Lockout Conditions. Asserted by the thermal element
(THERMLO), starts per hour function (NOSLO), minimum
time between starts (TBSLO), and the antibackspin timer
(ABSLO).
2
*
*
Reserved for future use.
50P1T
50P2T
Level 1 and Level 2 Definite-Time Phase Overcurrent
Elements.
50N1T
50N2T
Level 1 and Level 2 Definite-Time Neutral Overcurrent
Elements.
50QT Negative-Sequence Overcurrent Element.
50S
Motor Starting Overcurrent Element
(pickup = 2.5 • full load current).
3
50G1T
50G2T
Level 1 and Level 2 Definite-Time Residual Overcurrent
Elements.
(Continued)