Category: Beckwith Electric

Standard Features

• Eight programmable outputs and six programmable inputs

• Oscillography recording

• 32-target storage

• Metering of all measured parameters

• Two RS-232 and one RS-485 communications ports

• Standard 19″ rack-mount design

• Removable printed circuit board and power supply

• Both 50 and 60 Hz models available

• Both 1 and 5 A rated CT inputs available

• Additional trip inputs for externally connected devices

• M-3800A IPScom® Communications Software

• S-3400 IPScom Communications Software for Windows 7 or later

• IRIG-B time synchronization

• Includes Modbus and BECO 2200 protocols

Optional Features

• Redundant power supply

• M-3920 Target Module

• M-3931 HMI Module

• M-3801A IPSplot® Oscillograph Analysis Software

• 4-Wire RS-485 Connection

Optional Functions

• Dual-zone phase distance protection for phase fault backup (21)

• Out of Step (78)

• Rate of change of frequency (81R)

Standard Features

• Eight programmable outputs and six programmable inputs

• Oscillograph recording

• 32-target storage

• Metering of all measured parameters

• Three communications ports (two RS-232. one RS-485)

• Standard 19″ rack-mount design

• Removable printed circuit board and power supply

• Both 50 and 60 Hz models available

• Both 1 and 5 Amp rated CT inputs available

• M-3822 IPScom® Communications Software

• IRIG-B time synchronization

LED Indicators

These LEDs are lit when conditions are met to close the breaker:

• Bus Upper Voltage Limit OK

• Gen/Line Upper Voltage

Limit OK

Breaker Close Relays

• Bus Lower Voltage Limit OK

• Gen/Line Lower voltage

Limit OK

• ∆V Limit OK

• ∆F Limit OK

• M-0193B Ready

Dry output contacts rated to make and carry 20 A up to 250 V dc, interrupt 0.9 A, 120 V dc inductive load;

0.4 A, 250 V dc inductive load. Open contacts or contacts to ground will withstand 1500 V ac for one minute.

Status Contacts

Relay contacts; closed indicates ∆F conditions OK

Relay contacts; closed indicates ∆V conditions OK

These are light duty contacts intended primarily for status interrogation by supervisory control They can be

used to light local lights with the following maximum restrictions: 1/2 A at 125 V dc resistive, 1 A 120 V ac,

250 V dc across open contacts

Minimum Frequency Difference

The guaranteed minimum frequency difference for operation is 0.0005 Hz; however, typical units consistently

operate with frequency differences of 0.0001 Hz.

Generator Protection M‑3420

Integrated Protection System® for Generators of All Sizes

• Microprocessor-based Generator Protection system

provides 17 protective relay functions

• Individually programmable input contacts can be

programmed to activate any one of eight output contacts

• Local and remote communications capability for both

monitoring and control functions

Protective Functions

• Overexcitation (V/Hz) protection (24)

• Phase Undervoltage protection (27)

• Sensitive dual-setpoint, reverse power detection suitable for sequential tripping (32)

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

• Sensitive negative-sequence overcurrent protection and alarming (46)

• Instantaneous overcurrent (50) protection

• Inadvertent generator energizing protection (50/27)

• Generator breaker failure protection (50BF)

• Neutral inverse time overcurrent (51N)

• Instantaneous overcurrent (50N) protection

• Three-phase inverse time overcurrent (51V)

• Phase overvoltage (59)

• Generator ground fault protection (59N)

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

• Four-step over/underfrequency protection (81)

• Generator phase differential (87)

• Ground differential (87GD) protection

• Accurate, independent controls require

no additional instrumentation for field setting

• Various ∆V and ∆F limits available

• Breaker closing times are field programmable

• 50 Hz operation available

Inputs

Gen/Line Voltage, nominal 120 V ac, 145 V ac maximum continuous. Will withstand 200 V ac for 1 sec.

Bus Voltage, nominal 120 V ac, 145 V ac maximum continuous. Will withstand 200 V ac for 1 sec.

Supply Voltage, minimum 100 V ac, maximum 140 V ac.

Enable Auto-Sync close.

Breaker Closing Time; field programmable from 20 to 800 ms.

 NOTE: Gen/Line, Bus and Supply voltages are transformer-isolated to allow complete freedom in

applications.

Burden

Gen/Line or Bus: 0.5 VA maximum at 120 V ac

Supply: 7 VA maximum at 120 V ac

Controls

UPPER VOLTAGE LIMIT (either input): 110 to 140 V ac, accuracy 1–1/2% of full scale

LOWER VOLTAGE LIMIT (either input): 90 to 120 V ac, accuracy 1–1/2% of full scale

∆V LIMIT (MAXIMUM VOLTAGE DIFFERENCE LIMIT): 1 to 5 V ac, accuracy 5% of full scale. Multiples of

this range are available. A ∆V LIMIT of 4 to 20 V ac or lower must be specified if the M-0193B is to be used

in conjunction with the M-0194 Generator Control Unit.

∆F LIMIT (Maximum Frequency Difference Limit): 0.05 to 0.5 Hz, accuracy 3% of full scale. An additional

range of 0.005 to 0.05 Hz is available.

Standard Functions

• Sync check with Phase, ∆V and ∆F with deadline/deadbus options (25)

• Phase undervoltage (27) protection

• Neutral over/undervoltage (59G/27G) protection

• Sensitive dual-setpoint, reverse power detection (32)

• Sensitive negative-sequence overcurrent protection and alarm (46)

• Negative sequence voltage (47)

• Instantaneous overcurrent (50) protection

• Instantaneous neutral overcurrent (50G) protection

• Three-phase inverse time overcurrent (51V) with voltage control/voltage restraint

• Neutral inverse time overcurrent (51G) protection

• Phase overvoltage (59) protection

• Peak overvoltage (59I) protection

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

• Directional inverse and definite time phase overcurrent (67)

• Directional inverse and definite time neutral overcurrent (67N)

• Reconnect enable (79)

• Over/Underfrequency (81 O/U)

Intertie Protection M‑3520 Integrated Protection System®

• Integrated Protection System for DER Intertie, providing:

 Loss of parallel utility operation protections

 Abnormal power flow protections

 Comprehensive suite of phase and ground

fault backed protections

 Abnormal operating protections

 Reconnect and Sync Check functions

• Microprocessor-based Intertie Protection Relay integrates

protection, metering, monitoring and waveform capture

• Provides 18 base protective relay functions and

3 optional protective functions

• Local and remote serial communications capabilities, plus

IRIG-B interface

Optional Features

• Redundant power supply

• M-3915 Target Module

• M-3931 Human-Machine Interface Module

• M-3801D IPSplot® PLUS Oscillograph Analysis Software

• 4-Wire RS-485 Connection