Schweitzer Engineering Laboratories SEL-421-4 - Table 1.2 SEL-421 Relay Characteristics

1.13
Date Code 20171021 Instruction Manual SEL-421 Relay
Introduction and Specifications
Product Characteristics
Table 1.2 SEL-421 Relay Characteristics
Characteristic Value
Standard processing rate 8 times per cycle
Battery monitor Two
Autorecloser Single-pole
MBG protocol Supported
SELOGIC
Protection freeform 250 lines
Automation freeform 421-4: 1 block of 100 lines
421-5: 10 blocks of 100 lines each
SEL
OGIC variables 64 protection
256 automation
SEL
OGIC math variables 64 protection
256 automation
Conditioning timers 32 protection
Sequencing timers 32 protection
32 automation
Counters 32 protection
32 automation
Latch bits 32 automation
32 protection
Control
Remote bits 32
Breakers Two for control and three for status: 1, 2, 3
Three-Pole or Single-Pole
Disconnects 10
Bay control Supported
Metering
Maximum/minimum metering Supported
Energy metering Supported