generator protection m‑3430 - beckwith electric · industry leader since 1969 made in the usa...

Industry Leader Since 1969Made in the USA

Generator Protection M‑3430

Unit shown with optional M‑3930 Target Module and M‑3931 HMI (Human‑Machine Interface) Module

PROTECTION

• Microprocessor-based Generator Protection Relay that uses digital signal processing technology to provide fifteen protective relaying functions

• Individually programmed input contacts that can be programmed to activate the output contacts.

• Provides time-targeted information for the 32 most recent events

• Local and remote communications ability

Integrated Protection System® for Generators of All Sizes

–2–

M‑3430 Generator Protection Relay

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

• Overexcitation (V/Hz) protection (24)

• 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)

• Generator breaker failure protection (50BF)

• Inadvertent generator energizing protection (50/27)

• Phase overvoltage (59) and undervoltage (27) protection

• 100% stator ground fault protection (59N/27TN)

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

• Four-step over/underfrequency protection (81)

• Generator phase differential protection (87)

Additional Features • Eight programmable outputs and six programmable inputs

• Oscillograph 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-3930 Target Module

• M-3931 Human-Machine Interface (HMI) Module

• M-3801D IPSplot™ Plus Oscillograph Analysis Software

• 4-Wire RS-485 Connection

–3–


STANDARD PROTECTIVE FUNCTIONSDevice Setpoint Number Function Ranges Increment Accuracy†

Phase Distance (dual‑zone mho characteristic)

Circle Diameter #1, #2 0.1 to 100.0 Ω 0.1 Ω 0.1 Ω or 5%

(0.5 to 500.0 Ω) (0.5 Ω or 5%)

Offset #1, #2 –100.0 to 100.0 Ω 0.1 Ω 0.1 Ω or 5%

(–500.0 to 500.0 Ω) (0.5 Ω or 5%)

Impedance Angle #1, #2 0° to 90° 1° ±1°

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or ±1%

Volts / Hz

Definite Time Pickup #1, #2 100 to 200% 1% ±1%

Time Delay #1, #2 30 to 8160 Cycles 1 Cycle +25 Cycles

Inverse Time Characteristic Curves Inverse Time #1–#4 — —

Pickup 100 to 200% 1% ±1%

Time Dial: Curve #1 1 to 100 1 — Time Dial: Curves #2–#4 0 to 9 0.1 —

Reset Rate 1 to 999 Sec. 1 Sec. .06 Sec. or 1% (from threshold of trip)

The percent pickup is based on nominal VT secondary voltage and nominal system frequency settings.

The pickup accuracy stated is only applicable from 10 to 80 Hz, 0 to 180 V, and 100 to 150% V/Hz.

RMS Undervoltage

Pickup #1, #2 5 to 200 V 1 V 0.5 V or 0.5% 0.8 V or 0.75%*

Time Delay #1, #2 1 to 8160 Cycles 1 Cycles +20 Cycles or ±1%**

* When both RMS and line‑ground to line‑line is selected.

** When RMS (total waveform) is selected, timing accuracy is +20 cycles or ±1%; when DFT (fundamental RMS) is selected, accuracy is –1 to +3 cycles or 1%.

Third‑Harmonic Undervoltage, Neutral

Pickup #1, #2 0.3 to 20.0 V 0.1 V 0.5 V

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

Undervoltage Inhibit 5 to 200 V 1 V 0.5 V or 0.5% (positive sequence)

Underpower Inhibit 0.002 to 3.000 PU 0.001 PU 0.002 PU or 2%

Directional Power

Pickup #1, #2 -3.000 to +3.000 PU 0.001 PU 0.002 PU or 2%

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle +16 Cycles 1%

The per‑unit pickup is based on nominal VT secondary voltage and nominal CT secondary current settings.

† Select the greater of these accuracy values. Values in parentheses apply to 1 A CT secondary rating.

27TN

27

32

24

3φ

27

3φ

3φ

32

21

3φ

–4–


STANDARD PROTECTIVE FUNCTIONS (cont.)Device Setpoint Number Function Ranges Increment Accuracy†

Loss of Field (dual‑zone offset‑mho characteristic)

Circle Diameter #1, #2 0.1 to 100.0 Ω 0.1 Ω 0.1 Ω or 5%

(0.5 to 500.0 Ω) (0.5 Ω or 5%)

Offset #1, #2 -50.0 to 50.0 Ω 0.1 Ω 0.1 Ω or 5%

(-250.0 to 250.0 Ω) (0.5 Ω or 5%)

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

Voltage Control 5 to 200 V 1 V 0.5 V or 0.5% (positive sequence)

Directional Element Fixed at -13° — —

Voltage control for each zone can be individually enabled.

Negative Sequence Overcurrent

Definite Time Pickup 3 to 100% 1% 0.5% of 5 A (0.5% of 1 A)

Time Delay 1 to 8160 1 Cycle –1 to +3 Cycles

Inverse Time Pickup 3 to 100% 1% 0.5% of 5 A (0.5% of 1 A)

Time Dial Setting 1 to 95 1 3% (K= I2

2t)

Definite Maximum Time to Trip 600 to 65,500 Cycle 1 Cycle –1 to +3 Cycles or 1%

Reset Time (Linear) 4 minutes (from threshold of trip) — —

Pickup is based on the nominal CT secondary current.

Inadvertent Energizing

Overcurrent Pickup 0.50 to 15.00 A 0.01 A 0.1 A or 2%

(0.10 to 3.00 A) (0.02 A or 2%)

Undervoltage Pickup 40 to 130 V 1 V 0.5 V

Pickup Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

Dropout Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

Breaker Failure

Phase Current Pickup 0.10 to 10.00 A 0.01 A 0.1 A or 2%

(0.02 to 2.00 A) (0.02 A or 2%)

Neutral Current Pickup 0.10 to 10.00 A 0.01 A 0.1 A or 2%

(0.02 to 2.00 A) (0.02 A or 2%)

Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or 1%

50BF can be initiated from designated output contacts or status inputs.

46

50BF3φ

50

27

50BF-Ph

50BF-N

40

3φ

50/273φ


–5–


STANDARD PROTECTIVE FUNCTIONS (cont.)Device Setpoint Number Function Ranges Increment Accuracy†

RMS Overvoltage

Pickup #1, #2 5 to 200 V 1 V ±0.5 V or ±0.5% 0.8 V or 0.75%*

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle +20 Cycles or ±1%**

* When both RMS and line‑ground to line‑line is selected.

** When RMS (total waveform) is selected, timing accuracy is +20 cycles or ±1%; when DFT (fundamental RMS) is selected, accuracy is –1 to +3 cycles or ±1%.

RMS Overvoltage, Neutral

Pickup #1, #2 5.0 to 200.0 V 0.1 V ±0.5 V or ±0.5%


VT Fuse‑Loss Detection

A VT fuse‑loss condition is detected by using the positive and negative sequence components of the voltages and currents. VT fuse‑loss output can be initiated from internally generated logic or from input contacts.

Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or ±1%

Frequency

Pickup #1,#2,#3,#4 50.00 to 67.00 Hz 0.01 Hz ±0.02 Hz 40.00 to 57.00 Hz*

Time Delay #1,#2,#3,#4 2 to 65,500 Cycles 1 Cycle –2 to +3 Cycles or ±1%

The pickup accuracy applies to 60 Hz models at a range of 57 to 63 Hz, and to 50 Hz models at a range of 47 to 53 Hz. Beyond these ranges, the accuracy is ±0.1 Hz.

* This range applies to 50 Hz nominal frequency models.

Phase Differential Current

Minimum Pickup 0.20 to 3.00 A 0.01 A ±0.10 A or ±5%

(0.04 to 0.60 A) (±0.02 A or ±5%)

Percent Slope 1 to 100% 1% ±2%

Time Delay 1 to 8160 Cycles 1 Cycle –1 to +3 Cycles or ±1%

When a time delay of 1 cycle is selected, the response time is less than 11/2 cycles.

External Functions

Two functions are provided for externally connected devices to trip through the M‑3430 to provide ad‑ditional logic and target information. Any one or more of the input contacts (INPUT1 through INPUT6) can be programmed to activate designated output contacts after a selected time delay.


Nominal Settings

Nominal Voltage 60 to 140 V 1 V — Nominal Current 0.50 to 6.00 A 0.01 A — VT Configuration Line to Line/Line to Ground/ Line to Ground to Line to Line Seal-In Delay 2 to 8160 Cycles 1 Cycle –1 to +3 Cycles or ±1%When Line‑Ground to Line‑Line is selected, the relay internally calculates the line‑line voltage from the line‑ground voltages for all voltage‑sensitive functions. This Line‑Ground to Line‑Line selection should only be used for a VT nominal secondary voltage of 69 V (not 120 V).

59N

60FL

81

EXT

59

3φ

3φ

87


–6–


MeteringThe M-3430 provides metering of voltages (phase, neutral and sequence quantities), currents (phase, neutral and sequence quantities), real power, reactive power, power factor and impedance measurements.

Metering accuracies are:

Voltage: ±0.5 V or ±0.5%, whichever is greater 0.8 V or 0.75%, whichever is greater (when both RMS and Line-Ground to Line-Line is selected)

Current: 5 A rating, ±0.1 A or ±3%, whichever is greater

1 A rating, ±0.02 A or ±3%, whichever is greater

Power: ±0.01 PU or ±2%, whichever is greater(real and reactive)

Frequency: ±0.02 Hz (from 57 to 63 Hz for 60 Hz models; from 47 to 53 Hz for 50 Hz models)

Oscillograph RecorderThe oscillograph recorder provides comprehensive data recording of all monitored waveforms, storing up to 170 cycles of data. The total record length may be configured by user for 1, 2, 3 or 4 partitions. The sampling rate is 16 times the power system nominal frequency (50 or 60 Hz). When armed, the recorder is triggered either via the designated status inputs, trip outputs or via serial communications. When armed yet untriggered, the recorder continuously stores waveform data, keeping the most recent data in memory. When triggered, the recorder continues to store data in memory for a user-defined post-trigger delay period.

Target StorageA total of 32 targets can be stored. The information will include the function(s) operated, the functions picked up, input/output contact status, time stamp, timer status, and phase and neutral currents at the time of trip.

CalculationsCurrent and Voltage RMS Values: Uses discrete Fourier transform on sampled (16 times per cycle) voltage and current signals to extract fundamental frequency phasors for M-3430 calculations. RMS phase volt-ages for the 59 and 27 functions (when total RMS is selected), and the 24 function are obtained using the time domain approach to obtain accuracy over a wide frequency band. When the RMS option is selected, the magnitude calculation is accurate over a wide frequency range (10 to 80 Hz). When the DFT option is selected, the magnitude calculation is accurate near nominal frequency (50 or 60 Hz).

Power Input OptionsNominal 110/120/230/240 VAc, 50/60 Hz, or nominal 110/125/220/250 Vdc. UL/CSA rating 85 Vac to 265 Vac and from 80 Vdc to 288 Vdc. Burden 20 VA at 120 Vac/125 Vdc. Withstands 300 Vac or 300 Vdc for 1 second.

Nominal 24/48 Vdc, operating range from 18 Vdc to 56 Vdc. Burden 20 VA at 24 Vdc and 20 VA at 48 Vdc. Withstands 65 Vdc for 1 second.

Optional redundant power supply.

Sensing InputsFour Voltage Inputs: Rated nominal voltage of 60 Vac to 140 Vac, 60 Hz/(50 Hz optional). Will withstand 240 V continuous voltage and 360 V for 10 seconds. Source voltages may be line-to-ground or line-to-line connected. Phase sequence ABC/ACB is selectable. Voltage transformer burden less than 0.2 VA at 120 V.

Seven Current Inputs: Rated nominal current (IR) of 5.0 A or 1.0 A (optional), 60 Hz/(50 Hz optional). Will withstand 2IR continuous current and 100IR for 1 second. Current transformer burden less than 0.5 VA at 5 A (5 A option), or 0.3 VA at 1 A (1 A option).

–7–


Status Input ContactsThe status inputs, INPUT1 through INPUT6, can be programmed to block any of the M-3430 functions and to trigger the oscillograph recorder. The status inputs should be dry contacts and are internally connected (wetted) to a 24 Vdc power supply. To provide breaker status LED indication on the front panel, the INPUT1 status input contact must be connected to the 52b breaker status contact. The minimum current value to initiate/pickup an Input is >25 mA.

Output ContactsThe eight programmable output contacts (six form ‘a’ and two form ‘c’), the power supply alarm output contact (form ‘b’), and the self-test alarm output contact (form ‘c’) are all rated as per IEEE C37.90 (See Tests and Standards section for details).

Any of the M-3430 functions can be individually programmed to activate any one or more of the eight pro-grammable output contacts.

Target/Status Indicators and ControlsThe RELAY OK LED reveals proper cycling of the microcomputer. The BRKR CLOSED LED will turn on when the breaker is closed (when 52b contact input is open). The OSC TRIG LED indicates that oscillographic data has been recorded in the unit's memory. The TARGET LED will turn on when any of the relay functions oper-ate. Pressing and releasing the TARGET RESET button resets the TARGET LED if the conditions causing the operation have been removed. Holding the TARGET RESET button displays the present pickup status of the M-3430 functions. The PS1 and PS2 LEDs will remain on as long as power is applied to the unit and the power supply is operating properly.

CommunicationCommunications ports include rear panel RS-232 and RS-485 ports, a front panel RS-232 port, and an IRIG-B port. The communications protocol implements serial, byte-oriented, asynchronous communication, providing the following functions when used with the Microsoft® Windows-compatible M-3800A or S-3400 (Windows 7 or later) IPScom® Communications Software package. MODBUS and BECO 2200 protocols are supported, providing:

• Interrogation and modification of setpoints

• Time-stamped trip target information for the 32 most recent events

• Real-time metering of all quantities measured

• Downloading of recorded oscillographic data (Not available with MODBUS)

IRIG‑BThe M-3430 can accept a modulated IRIG-B time clock synchronization signal through a BNC connector provided at the rear of the unit. The IRIG-B time synchronization information is used to correct the hour, minute, seconds and milliseconds information.

HMI Module (optional)Local access to the M-3430 is provided through an optional M-3931 HMI (Human-Machine Interface) Module, allowing for easy-to-use, menu-driven access to all functions via six buttons and a 2-line by 24 character alphanumeric LCD. The module connects quickly to the M-3430 Generator Protection. HMI module features include:

• User-definable access codes allow three levels of security

• Interrogation and modification of setpoints

• Time-stamped trip target information for the 32 most recent events

• Real-time metering of all quantities measured

–8–


Target Module (optional)An optional M-3930 Target Module provides 24 target and 8 output LEDs. Appropriate target LEDs will light when the corresponding M-3430 function operates. The targets can be reset with the TARGET RESET pushbutton. The OUTPUT LEDs indicate the status of the programmable output contacts.

Type Tests and StandardsThe M-3430 Generator Protection relay complies with the following type tests and standards:

Voltage Withstand

Dielectric WithstandIEC 255-5 3,500 Vdc for 1 minute applied to each independent circuit to earth 3,500 Vdc for 1 minute applied between each independent circuit 1,500 Vdc for 1 minute applied to IRIG-B circuit to earth 1,500 Vdc for 1 minute applied between IRIG-B to each independent circuit

Impulse VoltageIEC 255-5 5,000 V pk, +/- polarity applied to each independent circuit to earth 5,000 V pk, +/- polarity applied between each independent circuit 1.2 by 50µs, 500 ohms impedance, three surges at 5 second intervals

Insulation ResistanceIEC 255-5 > 40 Megaohms

Electrical Environment

Electrostatic Discharge TestIEC 1000-4-2 Class 4 (8 kV) – point contact discharge

Fast Transient Disturbance TestsIEC 1000-4-4 Class 4 (4 kV, 2.5 kHz)

Surge Withstand CapabilityANSI/IEEE 2,500 V pk-pk oscillatory applied to each independent circuit to earth C37.90.1 2,500 V pk-pk applied between each independent circuit 5,000 V pk Fast Transient applied to each independent circuit to earth 5,000 V pk Fast Transient applied between each independent circuit

Radiated SusceptibilityANSI/IEEE C37.90.2 25-1000 Mhz @ 35V/m

Output Contacts RatingsIEEE C37.90 30 A make for 0.2 seconds at 250 Vdc resistiveUL 508 8 A carry at 120 Vac, 50/60 HzCSA C22.2 No. 14 6 A break at 120 Vac, 50/60 Hz 0.1 A break at 125 Vdc 0.1 A break at 120 Vac

–9–


Atmospheric Environment

TemperatureIEC 68-2-1 Cold, –20° C for 96 hoursIEC 68-2-2 Dry Heat, +70° C for 96 hoursIEC 68-2-3 Damp Heat, +40° C @ 93% RH, for 96 hours

Mechanical Environment

VibrationIEC 255-21-1 Vibration response Class 1, 0.5 g Vibration endurance Class 1, 1.0 g

ComplianceUL-Listed per 508 – Industrial Control Equipment

CSA-Certified per C22.2 No. 14-95 – Industrial Control Equipment

External ConnectionsM-3430 external connection points are illustrated in Figures 1, 2, and 3 on the following pages.

PhysicalSize: 19.00" wide x 5.21" high x 10.00" deep (48.3cm x 13.2cm x 25.4 cm)

Mounting: The unit is a standard 19", semiflush, three-unit high, rack-mount panel design, conforming to ANSI/EIA RS-310C and DIN 41494 Part 5 specifications. Vertical mounting is also available.

Contact Beckwith Electric for optional GE L-2/Westinghouse FT-41 retrofit panel vertical mounting details.

Environmental: For flat surface mounting on a Type 1 enclosure, rated to 70°C surrounding air ambient.

Approximate Weight: 13 lbs (5.9 kg)

Approximate Shipping Weight: 15 lbs (6.8 kg)

Patent & WarrantyThe M-3430 Generator Protection Relay is covered by U.S. Patents 5,592,393 and 5,224,011.

The M-3430 Generator Protection Relay is covered by a five year warranty from date of shipment.

Specification is subject to change without notice.

–10–


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–11–


50

Utility System

52Unit

52Gen

50BF-Ph

87

40 4660FL 32

27

81 27 59 24

CT

VT

CT

M-3430

This function provides control forthe function to which it points.

NOTE: Some functions aremutually exclusive; seeInstruction Book for details.

M-3430 TypicalConnection Diagram

C

B

A

B A

C

27

VT

59N27TN

27

32

R

CT

50BF-N

High‑impedanceGrounding

IN

21

Figure 2 One-Line Connection Diagram

–12–


Example of Control / Output Connections

+

-61 11 10

60

16 15

52b 60FL

POWERSUPPLY

SELF-TESTFAILUREALARM

+

-

DC: 24 V 48 V

EXTERNAL INPUTS ALARM OUTPUTS CONTROLOUTPUTS

TRIP

ALARM

12 13

POWER OKSTATUSALARM

VTFUSELOSS

TRIP

52G

52Ga

2

4

5

TRIP OUTPUT

OSCILLOGRAPHRECORDERINITIATE

BREAKERFAILUREINITIATE

3 3

M-34306

3

48 49

46 47

OtherRelays

A B C

PowerTransformer

UTILITY SYSTEM

a

b

c

ACCircuit

Breaker

Generator

58 59

56 57

54 55

OtherRelays

52 53

M-3430

M-3430

M-3430

50 51

A B C

45

44

M-3430

Alternate VT connections Required generator breaker status input (52b). Contact is closed when generator breaker is open. Use unit breaker contact if no generator breaker present. Output contact pairs designated by user. Alarm output can be grouped to a single alarm at discretion of user. Available control output to supervise other relays for VT Fuse Loss can be designated. Input contact number is designated by user.

52Unit

52Gen

M-3430

Two VT Open-DeltaConnection

40 41 38 3942 43

Three VT Wye-WyeConnection

40 41 38 3942 43

A

B

C

1 1

M-3430

10

1152b

M-34302

ORDC: 110 V 125 V 220 V 250 VAC: 110 V 120 V 230 V 240 V

62

63

NOTE: M-3430 current terminal polarity marks ( ) indicate"entering" current direction when primary current is "from"the generator. If CT connections differ from those shown,adjust input terminals.

WARNING: ONLY dry contacts must be connectedbecause these contact inputs are internally wetted.Application of external voltage on these inputs may resultin damage to the units.

58

57 56

55 54

OtherRelays

M-3430

59

a b c

ALTERNATECONNECTIONS

58

56

55 54

OtherRelays M-3430

a b c

59

57

IC

IB

IA

Figure 3 Three-line Connection Diagram

–13–


Standard 19" Horizontal Mount Chassis

19.00[48.26]

17.50[44.45]

17.50[44.45]

ACTUAL

5.21[13.23]

ACTUAL

0.40 [1.02] X 0.27[0.68] Slot (4X)

10.20[25.91]

18.31[46.51]

0.35[0.89]

1.48[3.76]

2.25[5.72]

17.68[44.91]

RECOMMENDED CUTOUT WHEN RELAY ISNOT USED AS STANDARD RACK MOUNT

5.28[13.41]

NOTE: Dimensions in brackets are in centimeters.

NOTE: Panels for vertical mounting are available. When mounted vertically, the target module will be located at the top and all front-panel text will be horizontally aligned. Consult the factory for details.

Figure 4 Horizontal Mounting Diagram

–14–


1.97[5.0]

19.00[48.26]

18.30[46.51]

2.25[5.72]

0.28 [0.71]Dia. (4X)

17.68[44.91]

5.59[14.20]Actual

1.67[4.24]

2.25[5.72]

10.20[25.91]

COM 1

TARGETS

OUT 1

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUTPUTSOUT 7

OUT 8

EXIT ENTER

TARGET DIAG

TIME

OSC.TRIG

SYNC

BRKRCLOSED

OKRELAY

TARGETRESET

PS 2 PS 1

17.5[44.45]

ACTUAL

5.65[14.40]

Recommended cutout when relay is not used asstandard rack mount and is panel cut out mounted.

19.00[48.26]

17.50[44.45]

0.35[0.89]

0.03[0.076]

NOTE: Dimensions in brackets are in centimeters.

6.19[15.7]

Figure 5 Vertical Mounting Diagram

–15–


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