Beckwith Electric M-3410A Intertie/Generator Protection Relay

• Available in four different Mounting configurations shown above, plus

Surface Mount (Option S1)

• Facilitates standardization for small/medium intertie and generator

protection applications

• Microprocessor-based relay provides 15 protective relay functions,

including Sync-Check, 2 programmable outputs and 2 programmable

inputs

• Relay voltage inputs can be directly connected (no VT required) for

voltages 480 V or less

• Local and remote serial communications (MODBUS protocol)

capability for monitoring and control functions

Protective Functions

• Sync-check with Phase Angle, ∆V and ∆F with dead line/dead bus

options (25)

• Phase undervoltage (27) protection

• Ground undervoltage (27G) protection

• Dual-setpoint, single or three phase, directional power detection that

can be selected as over/ under power protection (32)

• Dual-zone, offset-mho loss-of-field for generator protection (40)

• Sensitive negative sequence overcurrent protection and alarm (46)

• Negative sequence overvoltage (47)

• Inverse time residual overcurrent (51N)

• Phase overcurrent with voltage restraint/control (51V) protection

• Phase overvoltage (59) protection

• Ground overvoltage (59G) protection

• Peak overvoltage (59I) protection

• VT fuse-loss detection and blocking (60FL)

• Reconnect enable for intertie protection (79)

• Four-step over/under frequency (81) protection

Standard Features

• 2 programmable outputs, 2 programmable inputs, and 1 self-test output

• Oscillographic recording (COMTRADE file format)

• Time-stamped sequence of events recording for 32 events

• Metering of Voltage, Current, real and reactive Power, Power Factor,

Frequency, and Positive Sequence Impedance

• One RS-232 port (COM1) on front and one RS-232 or 485 port (COM2)

on rear

• M-3810A IPScom for Windows Communications Software

• MODBUS protocol

• Supports both 50 and 60 Hz applications

• Accepts 1 A or 5 A rated CT inputs

• Relay voltage inputs can be directly connected (no VT required) for

voltages ≤ 480 Vac

• Continuous Self-Diagnostics

Description

M‑3410A Intertie/Generator Protection Relay – Specification

The M-3410A Intertie/Generator Protection Relay is intended for the

protection of the intertie between the utility and dispersed generation.

It is also suitable for the protection of synchronous and induction

generators.

Communications and control features of the M-3410A are accomplished

utilizing the M-3810A IPScom for Windows Communications Software.

Oscillographic Recorder

The oscillographic recorder provides comprehensive data recording of all

monitored waveforms, input contacts, and output contacts, storing up to

120 cycles of data. The total record length is configured for one or two

partitions. A programmable post trigger delay (5 to 95%) is incorporated

to capture breaker operation.

The oscillograph is triggered remotely using the serial interface, designated

status input signals, or M-3410A programmable output operations.

Storage of oscillographic records is nonvolatile and will be retained even

without power, as long as the on-board battery is healthy.

Oscillographic data can be downloaded using serial communication in

Common Format For Transient Data Exchange (COMTRADE) format as

specified by IEEE Standard C37.111-1999.

Sequence of Events

A total of 32 nonvolatile events can be stored. The recorded information

includes the function(s) operated, the function(s) picked up, input/output

contact status and time stamp. The events can be retrieved through the

communications port. After the 32nd event is stored, additional events

result in the oldest event being dropped (FIFO).

The information is time-stamped to 1 ms resolution.