Schweitzer Engineering Laboratories SEL-701 - Page 255

Date Code 20010719 701 Motor Protection Relay
SELOGIC
®
Control Equations & Relay Logic
Relay Word Bits
B.7
Table B.2 Relay Word Bit Definitions for SEL-701 (Continued)
Row Bit Definition
AMBALRM
AMBTRIP
Ambient Temperature Alarm and Trip. AMBALRM asserts if
the healthy ambient RTD temperature exceeds its alarm
setpoint. AMBTRIP asserts when the healthy ambient RTD
temperature exceeds its trip setpoint.
OTHALRM
OTHTRIP
Other Temperature Alarm and Trip. OTHALRM asserts
when any healthy other RTD temperature exceeds its
alarm setpoint. OTHTRIP asserts when one or two (when
EOTHV = Y) healthy bearing RTD temperatures exceed
their trip setpoints.
27P1
27P2
Level 1 and Level 2 Phase Undervoltage Pickup.
59P1
59P2
Level 1 and Level 2 Phase Overvoltage Pickup.
59G Residual Overvoltage Element Pickup.
6
81D1T
81D2T
81D3T
Level 1, Level 2, and Level 3 Definite Time
Over/Underfrequency Element Trip. Assert when the
frequency has been either above or below the element
setpoint for a definite time.
37PA
37PT
Underpower Alarm (37PA) and Trip (37PT). Assert when the
relay issues an underpower element alarm or trip.
55A
55T
Power Factor Alarm (55A) and Trip (55T). Assert when the
relay issues a power factor element alarm or trip.
VARA
VART
Reactive Power Alarm (VARA) and Trip (VART). Assert
when the relay issues a reactive power element alarm or trip.
7
*
*
Reserved for future use.
LT1
LT2
LT3
LT4
SELOGIC control equation latch bit results. 8
RB1
RB2
RB3
RB4
Remote bits 1 through 4.
(Continued)