Schweitzer Engineering Laboratories SEL-701 - Figure B.17 Load-Jam Elements Logic; Figure B.18 Load-Loss Logic; no Voltage Option

701 Motor Protection Relay Date Code 20010719
SEL
OGIC
®
Control Equations & Relay Logic
Selected Relay Logic Diagrams
B.40
Figure B.17 Load-Jam Elements Logic.
Figure B.18 Load-Loss Logic; No Voltage Option.
Load Jam
Trip Delay Timer
LJTPU
I1
Setting
RUNNING
Relay
Word
Bit
Setting
Relay
Word
Bit
LJTDLY
0
JAMTRIP
LJTPU =
I1 =
RUNNING =
LJTDLY =
JAMTRIP =
Load-Jam Trip Pickup
Positive-Sequence Current Magnitude
Motor is Running
Load-Jam Trip Delay
Load-Jam Trip
LJTPU  OFF
STARTING
RUNNING
LLAPU
 OFF
Rising
Edge Detect
Load Loss
Trip Delay Timer
Relay
Word
Bits
LOSSTRIP
LOSSALRM
LLTPU • FLA
LLAPU • FLA
Load Loss
Start Delay Timer
Relay
Word
Bits
0
LLTDLY
LLSDLY
0
I
1
Load Loss
Alarm Delay Timer
LLADLY
0
I
1
I
1
=
STARTING =
RUNNING =
LOSSTRIP =
LOSSALRM =
Positive-Sequence Current
Motor is Starting
Motor is Running
Load Loss Trip
Load Loss Alarm
LLTPU =
FLA =
LLAPU =
LLTDLY =
LLSDLY =
LLADLY =
Load LossTrip Pickup Setting
Full Load Amps Setting
Load Loss Alarm Pickup Setting
Load Loss Trip Delay Setting
Load Loss Start Delay Setting
Load Loss Alarm Delay Setting