BECKWITH ELECTRIC M?3311A User manual

Instruction Book

M‑3311A Transformer

Protection Relay

Transformer Protection

M‑3311A

• For Transformers of All Sizes:

2, 3 or 4 winding Transformers for Transmission and

Distribution applications

Generator-Transformer Unit Overall Differential

Unit Protection of Other Electrical Apparatus and

certain Bus Arrangements (including those with a

transformer in the zone)

• Additional Applications: System Backup Protection, Load Shedding

(voltage and frequency), Bus Protection, and individual Breaker

Failure Protection for each winding input

• Available voltage conﬁgurations include zero, two or four voltage

inputs

• Ground Differential conﬁgurations include one, two or three

current inputs

• Optional Ethernet Connection and Expanded I/O

• Optional Voltage Package includes, 24 Volts/Hz

Overexcitation, 27 Phase Undervoltage, 59G Ground Overvoltage

and 81O/U Over/Under Frequency

Integrated Protection System®

Unit shown with optional M‑3931 HMI Module and M‑3911 Target Module

PROTECTION

–2–

M‑3311A Transformer Protection Relay

Standard Protective Functions

• Negative-sequence inverse time overcurrent (46)

• Winding thermal protection (49)

• Four winding instantaneous phase overcurrent (50)

• Breaker Failure (50BF)

• Instantaneous ground overcurrent (50G)

• Instantaneous residual overcurrent (50N)

• Four winding inverse time phase overcurrent (51)

• Inverse time ground overcurrent (51G)

• Inverse time residual overcurrent (51N)

• Two, three or four winding phase differential (87T) and high set instantaneous (87H)

• Ground differential (87GD)

• IPSlogic®

Optional Voltage Protection Package

• Overexcitation (24) V/Hz, two deﬁnite time and one inverse time elements

• Phase Undervoltage (27) function for load shedding

• Phase Overvoltage (59)

• Ground Overvoltage (59G)

• Over/Underfrequency (81O/U)

Standard Features

• Eight programmable outputs and six programmable inputs

• Oscillographic recording

• Through-Fault Monitoring

• 8-target storage

• Real time metering of measured and calculated parameters, including demand currents

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

• Standard 19" rack-mount design

• Removable printed circuit board and power supply

• 50 and 60 Hz models available

• 1 or 5 A rated CT inputs available

• S-3300 IPScom®Communications Software

• IRIG-B time synchronization

• Sequence of Events Log

• Breaker Monitoring

• Multiple Setpoint Groups

• Trip Circuit Monitoring

• Includes MODBUS and DNP 3.0 protocols

• Summing Currents from multiple sources for 49, 50, 51, 50N, 51N, 87 GD and Through Fault functions

Optional Features

• Redundant Power Supply

• M-3911A Target Module

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

• M-3801D IPSplot®Plus Oscillograph Analysis Software

• RJ45 Ethernet port utilizing MODBUS over TCP/IP, BECO 2200 over TCP/IP, IEC 61850 or DNP 3.0

protocol

• Expanded I/O (8 additional outputs and 12 additional inputs)

• Standard and Expanded I/O Models available in vertical panel mount

• Close Circuit Monitoring on Expanded I/O units

–3–

M‑3311A Transformer Protection Relay

STANDARD PROTECTIVE FUNCTIONS

Device Setpoint

Number Function Ranges Increment Accuracy†

Negative Sequence Overcurrent

46W2/46W3/46W4

Deﬁnite Time

Pickup 0.10 to 20.00 A 0.01 A 0.1 A or 3%

(0.02 to 4.00 A) (0.02 A or 3%)

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

Inverse Time

Pickup 0.50 to 5.00 A 0.01 A 0.1 A or 3%

(0.10 to 1.00 A) (0.02 A or 3%)

Characteristic Curves Deﬁnite Time/Inverse/Very Inverse/Extremely Inverse/IEC Curves/IEEE

Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 5%

0.05 to 1.10 (IEC curves) 0.01

0.5 to 15.0 (IEEE curves) 0.1

Winding Thermal Protection

Time Constant 1.0 to 999.9 minutes 0.1 minutes

Maximum Overload Current

1.00 to 10.00 A 0.01 A 0.1 A or 2%

(0.2 to 2.00 A) (0.02 A or 3%)

Winding Select Sum1, Sum2, W1, W2, W3, or W4

Instantaneous Phase Overcurrent

1-8

Pickup 1.0 to 100.0 A 0.1 A 0.1 A or 3%

(0.2 to 20.0 A) (0.02 A or 3%)

Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%

Current Selection Sum1, Sum2, W1, W2, W3, W4

Breaker Failure

50BFW1/50BFW2/50BFW3/50BFW4

Pickup (phase) 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%)

Pickup (residual) 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 2%

Instantaneous Ground Overcurrent

50GW2/50GW3/50GW4

Pickup #1, #2 1.0 to 100.0 A 0.1 A 0.1 A or 3%

(0.2 to 20.0 A) (0.02 A or 3%)

Time Delay #1, #2 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%

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

50G

–4–

M‑3311A Transformer Protection Relay

STANDARD PROTECTIVE FUNCTIONS (cont.)

Device Setpoint

Number Function Ranges Increment Accuracy†

Instantaneous Residual Overcurrent

1-8

Pickup 1.0 to 100.0 A 0.1 A 0.1 A or 3%

(0.2 to 20.0 A) (0.02 A or 3%)

Time Delay 1 to 8160 Cycles 1 Cycle 2 Cycles or 1%

Current Selection Sum1, Sum2, W1, W2, W3, W4

Inverse Time Phase Overcurrent

1-4

Pickup 0.50 to 12.00 A 0.01 A 0.1 A or 3%

(0.10 to 2.40 A) (0.02 A or 3%)

Current Selection Sum1, Sum2, W1, W2, W3, W4

Characteristic Curve Beco Deﬁnite Time/Inverse/Very Inverse/Extremely Inverse

IEC Inverse/Very Inverse/Extremely Inverse/Long Time Inverse

IEEE Moderately Inverse/Very Inverse/Extremely Inverse

Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 3%

0.05 to 1.10 (IEC curves) 0.01

0.5 to 15.0 (IEEE curves) 0.1

Two or three of the windings may be summed together.

Inverse Time Ground Overcurrent

51GW2/51GW3/51GW4

Pickup 0.50 to 12.00 A 0.01 A 0.1 A or 3%

(0.10 to 2.40 A) (0.02 A or 3%)

Characteristic Curve Beco Deﬁnite Time/Inverse/Very Inverse/Extremely Inverse

IEC Inverse/Very Inverse/Extremely Inverse/Long Time Inverse

IEEE Moderately Inverse/Very Inverse/Extremely Inverse

Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 3%

0.05 to 1.10 (IEC curves) 0.01

0.5 to 15.0 (IEEE curves) 0.1

Inverse Time Residual Overcurrent

1-4

Pickup 0.50 to 6.00 A 0.01 A 0.1 A or 3%

(0.10 to 1.20 A) (0.02 A or 3%)

Characteristic Curve Beco Deﬁnite Time/Inverse/Very Inverse/Extremely Inverse

IEC Inverse/Very Inverse/Extremely Inverse/Long Time Inverse

IEEE Moderately Inverse/Very Inverse/Extremely Inverse

Time Dial Setting 0.5 to 11.0 0.1 3 Cycles or 5%

0.05 to 1.10 (IEC curves) 0.01

0.5 to 15.0 (IEEE curves) 0.1

Current Selection Sum1, Sum2, W1, W2, W3, W4

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

50N

51G

51N

–5–

M‑3311A Transformer Protection Relay

STANDARD PROTECTIVE FUNCTIONS (cont.)

Device Setpoint

Number Function Ranges Increment Accuracy†

Phase Differential Current

87H

Pickup 5.0 to 20.0 PU 0.1 PU 0.1 PU or 3%

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

87T

Pickup 0.10 to 1.00 PU 0.01 PU 0.02 PU or 5%

Percent Slope #1 5 to 100% 1% 1%

Percent Slope #2 5 to 200% 1% 1%

Slope Break Point 1.0 to 4.0 PU 0.1 PU —

Even Harmonics Restraint 5 to 50% 1% 1% or 0.1 A

(2nd and 4th)

5th Harmonic Restraint 5 to 50% 1% 1% or 0.1 A

Pickup at 5th

Harmonic Restraint 0.10 to 2.00 PU 0.01 PU 0.1 PU or 5%

CT Tap W1/W2/W3/W4 1.00 to 100.00 0.01 —

(0.2 to 20)

Trip response for 87T and 87H (if time delay set to 1 cycle) is less than 1.5 cycles. Each restraint element may be

individually disabled, enabled, or set for cross phase averaging.

Ground Differential

87GDW2/87GDW3/87GDW4

Pickup #1, #2 0.2 to 10.00 A 0.01 A 0.1 A or 5%

(0.04 to 2.00 A) (0.02 A or 5%)

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

3IOCurrent Selection Sum1, Sum2, W2**, W3**, W4**

Directional Element Disable/Enable

CT Ratio Correction (Rc) 0.10 to 7.99 0.01

*The Time Delay should not be less than 2 cycles.

This function is selectable as either directional or non-directional. If 3l0is extremely small, directional element is

disabled.

**Individual windings are selectable only for the same winding ground differential element. For example, you may

select W4 for 87GDW4 but not for 87GDW2 or 87GDW3.

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

–6–

M‑3311A Transformer Protection Relay

STANDARD PROTECTIVE FUNCTIONS (cont.)

Device Setpoint

Number Function Ranges Increment Accuracy†

IPSlogic

IPSlogic uses element pickups, element trip commands, control/status input state changes,

output contact close signals with programmable logic array to develop schemes.

Reset/Dropout Delay #1–#6 0 to 65500 Cycles 1 Cycle 1 Cycle or 1%

Time Delay #1–#6 1 to 65500 Cycles 1 Cycle 1 Cycle or 1%

Trip (Aux Input) Circuit Monitor

Trip Circuit Monitor

TCM Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

TCM Dropout Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

TCM via the "Aux Input" is the only available Trip Circuit monitor on non-expanded I/O units.

The TCM input is provided for monitoring the continuity of trip circuits. The input can be used for nominal trip coil

voltages of 24 Vdc – 250 Vdc. Trip circuit monitoring is performed in the active breaker status only (trip circuit

supervision when breaker is closed). Both the DC supply and continuity for the circuit is monitored.

Breaker Monitoring

Pickup 1 to 50,000 kA Cycles 1 kA Cycles  1 kACycles

or kA2Cycles or kA2Cycles or kA2Cycles

Time Delay 0.1 to 4095.9 Cycles 0.1 Cycles 1 Cycle or 1%

Timing Method IT or I2T

Preset Accumulators 0 to 50,000 kA Cycles 1 kA Cycle

Phase A, B, C

The Breaker Monitor feature calculates an estimate of the per-phase wear on the breaker contacts by measuring

and integrating the current (or current squared) through the breaker contacts as an arc.

The per-phase values are added to an accumulated total for each phase, and then compared to a user-

programmed threshold value. When the threshold is exceeded in any phase, the relay can set a programmable

output contact.

The accumulated value for each phase can be displayed.

The Breaker Monitoring feature requires an initiating contact to begin accumulation, and the accumulation begins

after the set time delay.

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

IPS

TCM

–7–

M‑3311A Transformer Protection Relay

STANDARD PROTECTIVE FUNCTIONS (cont.)

Device Setpoint

Number Function Ranges Increment Accuracy†

Through Fault

Through Fault 1.0 to 100.0 A 0.1A 0.1A or 5%

Current Threshold (0.2 to 20.0 A) (0.02A or 5%)

Through Fault Count Limit 1 to 65535 1 —

Cumulative I2T Limit 1 to 1000000(kA2Cycles) 1 1.0 kA Cycles

or kA2Cycles

Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

Current Selection Sum1, Sum2, W1, W2, W3 or W4 — —

Nominal Settings

Nominal Voltage 60.0 to 140.0 V 0.1 V —

VT Conﬁguration VA, VB, VC, VAB, VBC, VCA, VG

Phase Rotation ABC/ACB — —

Number of Windings 2, 3, or 4

Transformer/CT Connection Standard IEEE/IEC or Custom Connections

Functions that can be Implemented with Overcurrent/Input‑Output

Connections

Load Shedding

Can help prevent overloading of remaining transformers when a station transformer is out of service.

Bus Fault Protection

Provides high speed bus protection by combining digital feeder relay logic and transformer protection

logic.

Feeder Digital Relay Backup

Provides backup tripping of feeder relays by combining the self test alarm output of the feeder relays

with the transformer relay.

LTC fault blocking

Provides limited blocking of LTC during fault conditions.

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

–8–

M‑3311A Transformer Protection Relay

OPTIONAL VOLTAGE PROTECTION PACKAGE

Device Setpoint

Number Function Ranges Increment Accuracy†

Volts/Hz Overexcitation

Deﬁnite Time

Pickup #1, #2 100 to 200% 1% 1%

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

Inverse Time

Pickup 100 to 150% 1% 1%

Characteristic Curves Inverse Time #1–#4 — —

Time Dial: Curve #1 1 to 100 1 1%

Time Dial: Curves #2–#4 0.0 to 9.0 0.1 1%

Reset Rate 1 to 999 Sec. 1 Sec. 1 Second or 1%

(from threshold of trip)

Pickup based on nominal VT secondary voltage and nominal system frequency. Accuracy applicable from 10 to 80

Hz, 0 to 180 V, and 100 to 150% V/Hz.

This function is applicable only when phase voltage input is applied.

Phase Undervoltage

Pickup #1, #2*, #3* 5 to 140 V 1 V 0.5 V

Inhibit Setting 5 to 140 V 1 V 0.5 V

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

This function is applicable only when phase voltage input is applied.

* Elements #2 and #3 are not available in four winding applications.

Phase Overvoltage

1-3

Pickup 5 to 180 V 1 V 0.5 V or 0.5%

Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

Input Voltage Selection Phase, Positive Sequence, Negative Sequence

Ground Overvoltage

Pickup #1, #2, #3* 5 to 180 V 1 V 0.5 V or 0.5%

Time Delay #1, #2, #3* 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

Zero Sequence Voltage** VGor 3V0(Only for 2/3 Windings, 4 Voltage Inputs)

This function is applicable only when voltage input from a broken delta VT is applied.

* Element #3 is not available in four winding applications.

** This setting is only functional in 2/3 winding applications with ﬁrmware version V02.03.01 and later.

59G

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

–9–

M‑3311A Transformer Protection Relay

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

OPTIONAL VOLTAGE PROTECTION PACKAGE

Device Setpoint

Number Function Ranges Increment Accuracy†

Overfrequency/Underfrequency

Pickup #1, #2, #3, #4 55.00 to 65.00 Hz 0.01 Hz 0.1 Hz

45.00 to 55.00 Hz*

Time Delay #1, #2, #3, #4

2 to 65,500** Cycles 1 Cycle –1 to +3 Cycles or 1%

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.

* This range applies to 50 Hz nominal frequency models.

** For 65,500 cycles, time delay setting phase voltage must be greater than 35 Vac.

This function is applicable only when phase voltage of at least 27 Vac input is applied.

Trip and Close Circuit Monitor (Expanded I/O Units)

Trip Circuit Monitor

TCM-1 Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

TCM-1 Dropout Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

TCM-2 Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

TCM-2 Dropout Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

Close Circuit Monitor

CCM-1 Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

CCM-1 Dropout Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

CCM-2 Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

CCM-2 Dropout Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1%

The CCM/TCM inputs are provided for monitoring the continuity of trip and close circuits. The input(s) can be

used for nominal trip/close coil voltages of 24 Vdc – 250 Vdc. Trip and closing circuit monitoring are performed in

the active breaker status only (trip circuit supervision when breaker is closed and close circuit supervision when

breaker is open). Both the DC supply and continuity for each of the circuits are monitored.

O/U

TCM

CCM

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