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Additional features of the M-4272 include:

• Multiple setpoint profiles for various application requirements.

• Integrated control, supervisory functions, sequence of events, and oscillograph

recording.

• Extensive commissioning tools, including ringdown analysis.

• Optional M-3919A Graphic Display Unit (GDU) and Touch Screen Human Machin

Interface (HMI) for communicating with one or two M-4272 units.

• Optional M-5072 Retrofit Kit for M-4272 Replacement of M-0272/M-0236B Analog

Transfer Logic Controller.

• Fournit des transferts Automatiques et Manuelles des systèmes de l’autobus

dans les centrales électriques et les usines de transformation industrielle

• Assure la continuité des processus

• Sélectionne automatiquement Rapide, En-phase, Tension Résiduelle,

et Temps Fixe transferts du moteur de bus, en fonction des conditions

variables du système

• Applicable pour transferts Manuels et Automatiques, unilateraux et

bi-directionnelles

• Peut être agrandi pour accueillir des configurations multiples disjoncteurs

• Plusieurs profils de consigne pour les besoins de diverses applications

The M-4272 Digital Motor Bus Transfer system provides automatic and manual

 transfers of motor bus systems in power plants and industrial processing plants,

to ensure process continuity. For any critical application in which losing power

is unacceptable, the M-4272 seamlessly handles transfer to backup power sources.

It automatically selects fast, in-phase, residual voltage, and fixed time motor bus

transfers, based on system conditions.

It is applicable for both one way and bi-directional manual and automatic transfers

and can be expanded to accommodate multiple breaker configurations.

• Contrôle intégré, des fonctions de surveillance, la séquence des

événements et l’enregistrement oscillographe dans un seul appareil

• Nombreux outils de mise en service, y compris anneau analyse

descendante

• Unité d’Affichage Graphique (UDG) M-3919 optionnelle et Écran

Tactile avec Interface Machine-Homme (IMH) pour communiquer

avec une ou deux unités M-4272

• En option Kit d’adaptation M-5072 pour Remplacement de

M-4272 de la commande analogique de transfert logique

M-0272/M-0236B

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