M-3310 BECKWITH Rơ le bảo vệ trạm biến áp M-3310 Transformer Protection System Beckwith Electric

• Fully Digital Multifunction Relay with eight programmable outputs, six programmable inputs, and four multiple setpoint groups
• Suitable for two-winding transformers of any size, and some three-winding applications
• Windows-based software offers extensive graphics for easy inservice commissioning
• Optional three-phase Voltage Protection Package available

Standard Protective Functions

• Negative-sequence inverse time overcurrent (46)
• Two winding, dual element instantaneous overcurrent (50W1 #1, 50W1 #2, 50W2 #1, 50W2 #2)
• Breaker Failure (50BF)
• Transformer neutral, instantaneous/inverse time overcurrent (50G/51G)
• Two winding inverse time phase overcurrent (51W1/51W2)
• Residual, inverse time overcurrent (51NW1/51NW2)
• Two winding, phase differential (87T) and High Set instantaneous (87H)
• Ground differential (87GD)
• Six External functions with individual timers

Optional Three-Phase Voltage Protection Package

• Overexcitation (24) V/Hz
• Phase undervoltage (27) function for load shedding
• Neutral overvoltage (59G)
• Underfrequency (81U)

Standard Features

• Multiple Setpoint Groups
• Eight programmable outputs and six programmable inputs
• Oscillographic recording
• 32-target storage
• Real time metering of measured parameters, with demand and maximum values
• Two RS-232 and one RS-485 communications ports
• Standard 19″ rack-mount design
• Removable printed circuit board and power supply
• 50 and 60 Hz models available
• 1 and 5 A rated CT inputs available
• M-3820A IPScom® Communications Software
• IRIG-B time synchronization
• Includes MODBUS and BECO 2200 protocols

Optional Features

• Redundant Power Supply
• M-3910 Target Module
• M-3931 Human-Machine Interface (HMI) Module
• M-3801D IPSplot® PLUS Oscillograph Analysis Software
• 4-Wire RS-485 Connection