SEL-849 Motor Management Relay
The SEL-849 Motor Management Relay offers current-, voltage-, and thermal-based motor protection; arc-flash detection; and power metering. It also provides all basic motor protection features, including protection for the following conditions:
The SEL-849 installs easily inside a motor control center (MCC). The optional SEL-3421 and SEL-3422 Motor Relay HMIs (human-machine interfaces) install on the front of the MCC.
Front- and Rear-Panel Diagrams
The SEL-849 Motor Management Relay supports pumping applications for water, chemicals, and petroleum; air-based applications, including fans, blowers, air handlers, and compressors; chiller applications, such as compressors and air-conditioning; and applications involving bulk materials, such as conveyors, crushers, screeners, feeders, augers, and bucket elevators.
COMPACT DESIGN FOR MOTOR CONTROL CENTERS
The compact form factor easily installs in small motor control center (MCC) drawers and buckets. Built-in current transformers save room and reduce installation time.
EASY-TO-USE WEB INTERFACE
The web interface makes it easy for electricians and technicians to configure and monitor the SEL-849.
EASY INTEGRATION WITH CONTROL SYSTEMS
Several communications protocol options allow the SEL-849 to be used with old and new control systems.
ARC-FLASH HAZARD PROTECTION
MCCs typically have large fault-current potential, resulting in increased arc-flash hazards. The SEL-849 Relay’s arc-flash detection capability significantly reduces total arc-flash energy.
SEL has 2 types of arc-flash sensor:
1. Point Sensor
2. Bare-Fiber Sensor
RUGGED HARDWARE YOU CAN RELY ON
All SEL relays are designed to operate in harsh environments where other relays may fail. The SEL-849 operates in extreme conditions, with an operating temperature of –40° to +85°C (–40° to +185°F), and is designed and tested to exceed applicable standards, including vibration, electromagnetic compatibility, and adverse environmental conditions