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

• 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

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.

Summary of Operation

• Installed between the battery and battery charger (with fuse protection for

reverse polarity of charger or battery), the M-2035 measures battery voltage,

charge and discharge current, detects AC power loss, and sends the

measurements to the controller through the SATA communication interface.

• Continuously monitors charger voltage. Conducts scheduled battery load

tests on 12 and 24 V battery configurations while automatically disconnecting

and reconnecting the battery charger.

• During tests, module controls the battery load resistor via command from

the M-7679 R-PAC so that when the load resistor is turned on, it disconnects

the high side switch. Reconnects high side switch after load resistor is turned

off. Does not turn on load resistor if loss of main power is detected.

• When running on battery power, the M-7679 R-PAC commands the M-2035

module to enter low power mode if the battery voltage drops below “Vmin Bat”

setting, disconnecting the M-7679. Local or remote pushbutton provides “

wakeup from sleep” functionality. When pressed, the pushbutton releases

module from sleep and activates high side switch to reconnect the battery

and power supply.

• While in the sleep mode, the M-2035 module wakes up every 5 seconds to

measure voltage at Charger Input (TB4) to determine when main power

returns. Provides “wakeup” functionality when main power is restored.

Battery Supply Off Command

When the battery voltage decreases to less than “Vmin Batt” (Figure 1) the

battery supply to the M-7679 R-PAC will be turned off to protect the battery.

The M-2035 remains connected to the battery. Discharging batteries below

certain levels will shorten the life of or damage the battery.

Threshold voltages can be edited in IPScom/Common Setpoints/IED Power

Supply/Battery Charger Monitor screen.

Wakeup System Command

The Wakeup system command is initiated with local panel pushbutton, allowing

the user to wake module from the Sleep Mode that was initiated by the Battery

Supply Off command. The wakeup system command restores power to the unit

for a user defined time period. If the main source power has not been restored,

the Battery Supply Off command will be repeated. The loss of main power is

determined by monitoring the battery current throughput polarity.

The M‑2035 Interface Module monitors power supplies and battery chargers

used in Reclosers that have been retrofitted to operate with Beckwith

Electric’s M-7679 R-PAC system. This analog to digital interface measures

voltage, current, and current direction which can be monitored with the

same S-7600 IPScom communication software used with the recloser control.

The interface module can be DIN rail mounted during installation of the

M-7679 R-PAC and includes a SATA cable for easy hookup to the Aux I/O port

in the recloser control. The module will accept 8 to 30 Vdc power from the

existing power supply and batteries.

The module features essential indicator lights for battery and communication

status plus on‑board and remote manual wake-up pushbuttons to restore

function after a power failure. Four extra analog to digital inputs are available

for voltage measurements up to 30 Vdc. The module is able to periodically

test the batteries by briefly disconnecting the charger with a high side switch

and switching on a resistive load for five seconds.

• Designed to interface with the M-7679 R-PAC.

• Allows the M-7679 R-PAC to monitor third party external power supplies and

12/24 V battery chargers.

• Provides four 0-30 Vdc Analog inputs. Using S-7600 IPScom communications

software, these inputs can be monitored and configured with two level

alarm settings per channel, and used in IPSlogic custom configurations.

• Monitor and test the battery system. Turns off the battery supply to enter

sleep mode during power loss.

• Transient and reverse polarity protected

• Operates on DC power from 8 to 30 V

• Substation hardened -40° C to +85° C

• Conformal coated

Disposal and Recycling

Disposal of E-Waste for Beckwith Electric Products Customers are

responsible for complying with local regulations when disposing of

electronic equipment removed from fixed installations. Alternatively,

equipment can be returned to Beckwith Electric for recycling—customers

cover shipping cost, and Beckwith Electric covers recycling cost.

Contact Beckwith Electric for an RMA number before returning equipment.

Trademarks

All brand or product names referenced in this document may be

trademarks or registered trademarks of their respective holders.

Specification subject to change without notice. Beckwith Electric has

approved only the English version of this document.

Warranty

The B-2291 is covered by a five-year warranty from date of shipment.

Specifications

Connection style: European style 3.81 mm pitch

M-7679 Input Connections: TB6 (IN 5–IN 8), TB7 (IN 9–IN 12)

M-7679 Harness Connectors: TB6. TB7

Supported M-7679 Configuration:

• Extended I/O – with B-2291. requires operating voltage range of 80

to 180 V dc

Package Contents: B-2291 Digital Input Guard only

Additional Information

Recommended Storage Parameters

Temperature: +5 °C to +40 °C (+41 °F to +104 °F)

Humidity: Maximum relative humidity 80% for temperatures

up to 31 °C (87.8 °F), decreasing to 31 °C linearly to 50% RH

at 40 °C (104 °F).

Environment: Storage area to be free of dust, corrosive gases, flammable

materials, dew, percolating water, rain, and solar radiation.

Standard Features

• Metallic enclosures are all welded seam construction, ground smooth

• NEMA 3RX or IP 55 rated

• Single exterior gasketed door with:

– Quarter turn 3 point latch with pad‑locking handle (includes hole for 3/8″

max lock hasp)

– Large open angle > 120°

– Hold open device

– Integral document holder

– Nameplate on inside of door

• Stainless steel hardware and hinges

• External ground stud

• Vented at bottom and upper back (fine mesh screens)

• All cabinet penetrations are sealed to prevent moisture and insect ingress

• Each cabinet includes the applicable connector layout in the bottom that

replicates the specific recloser control cabinet being replaced.

Also provides penetrations for options and future customer added accessories.

Connector mounting hardware is only accessible from inside of cabinet.

• Two lifting eyes, 1.5″ diameter holes, attached to sides of cabinet

• Interior swing panel with:

– Flush mounted recloser control

– Aluminum construction with class 3 chromate finish

– Thumb latches

– Ground strap

• Pole mounting bracket that includes:

– 5/8″ maximum bolt diameter with keyway at top

– 5/8″ bolt diameter slot at bottom

– 3 pole banding slots

• 35 mm DIN rail mounted Terminal Blocks