369 Motor Management RelayChapter 1: Introduction
Ordering
General Overview
The 369 Motor Management Relay is a digital relay that provides protection and monitoring for three-phase motors and their associated mechanical systems. A unique feature of the 369 Relay is its ability to ‘learn’ individual motor parameters and to adapt itself to each application. Values such as motor inrush current, cooling rates and acceleration time may be used to improve the 369 Relay’s protective capabilities.
The 369 Relay offers optimum motor protection where other relays cannot, by using the FlexCurve™ custom overload curve, or one of the fifteen standard curves.
The 369 Relay has one RS232 front panel port and three RS485 rear ports. The Modbus RTU protocol is standard to all ports. You can enter setpoints via the front keypad or using the EnerVista 369 Setup software on a computer. Status, actual values, and troubleshooting information are also available via the front panel display or via communications.
As an option, the 369 Relay can individually monitor up to 12 RTDs. These can be from the stator, bearings, ambient, or driven equipment. The type of RTD used is software selectable. Optionally available as an accessory is the remote RTD module which can be linked to the 369 Relay via a fibre optic or RS485 connection.
369 Motor Management Relay
Chapter 2: Product Description
Overview
Guideform Specifications
Motor protection and management shall be provided by a digital relay. Protective functions include:
• phase overload standard curves (51)
• overload by custom programmable curve (51)
• I2t modeling (49)
• current unbalance / single-phase detection (46)
• starts per hour and time between starts
• short circuit (50)
• ground fault (50G/50N 51G/51N)
• mechanical jam/stall
• two-speed motor protection
Optional functions include:
• under / overvoltage (27/59)
• phase reversal ( 47)
• underpower (37)
• power factor (55)
• stator/bearing overtemperature with twelve (12) independent RTD inputs (49/38)
• backspin detection
Management functions include:
• statistical data
• pre-trip data (last 40 events) OVERVIEW CHAPTER 2: PRODUCT DESCRIPTION
• ability to learn, display, and integrate critical parameters to maximize motor protection
• a keypad with a 40-character display
• flash memory
The relay is capable of displaying important metering functions, including phase voltages, kilowatts, kvars, power factor, frequency, and MWhr. In addition, undervoltage and low power factor alarm and trip levels are field programmable. The communications interface includes one front RS232 port and three independent rear RS485 ports with supporting PC software, thus allowing easy setpoint programming, local retrieval of information, and flexibility in communication with SCADA and engineering workstations.
369-A200
369B1860G0026
369B1860G0030
369-C100
369-C101
369-HI-0-0-0-0
369-HI-0-M-F-E-0
369-HI-R-M-0-0-0-E
369-HI-R-M-0-E-0
369-HI-R-M-0-P-0-E
369-HI-R-M-F-E-0
369-HI-R-M-F-E-H-E
369-LO-0-M-F-E-0-0
