Thytronic SME70-O Manuel utilisateur

SME70-O-Manual-04-2020

SME70-O

FAULT DETECTOR

MANUAL

SME70

27V1 59 59V2 59N

67N

SME70

27V1 59 59V2 59N

67N

SME70

27V1 59 59V2 59N

67N

2SME70-O-Manual-04-2020

INTRODUCTION

—Scope and liability

The functions, technical data, instructions for setting and commissioning of SME70-O devices are

explained.

This manual has been checked out, however, deviations from the description cannot be completely

ruled out, so that no liability in a legal sense for correctness and completeness of the information or

from any damage that might result from its use is formally disclaimed.

The information given in this document is reviewed regularly; any corrections and integration will be

included in subsequent editions that are identiﬁed by the date of revision.

We appreciate any suggestions for improvement.

We reserve the right to make technical improvements without notice.

—Applicability

This manual is valid for SME70-O devices with ﬁrmware version 1.00 and following.

—Conformity

The product complies with the CEE directives:

• EMC Council Directives 2014/30/EC

• Low voltage Directives: 2014/35/EC

• GICT-SGL_12_v01_OCS OT Security Guideline

—Technical support

Contact: THYTRONIC Technical Service www.thytronic.it

—Copyright

—Warranty

Thytronic warrants devices against defects in materials and workmanship under normal use for a

period of ONE (1) YEAR from the date of retail purchase by the original end-user purchaser (“War-

ranty Period”).

—Safety recommendations

The warming contained in this document are all-important for safety; special attention must be paid

to the following symbols:

Installation and commissioning must be carried out by qualiﬁed person; Thytronic assumes no re-

sponsibility for damages caused from improper use that does not comply all warning and caution in

this manual.

In particular the following requirements must be met:

• Remove power before opening it.

• Verify the voltage absence by means suitable instrumentation on relay connections; attention must

be paid to all circuits supplied by external sources (binary input, analog inputs, etc...)

• Care must be taken when handling metal parts (front panel, connectors).

—Insulation tests

After insulation tests, hazardous voltages (capacitor charges,...) may be arise; it is advisable to grad-

ually reduce the test voltage avoiding to erase it abruptly.

WARNING Death, severe personal injury or substantial property damage can result if proper precautions

are not taken.

CAUTION Minor personal injury or property damage can result if proper precautions are not taken

SME70-O-Manual-04-2020

G E N E R A L

—Relay typology

SME70-OSuitable to install on MV cable lines connected outdoor RGDAT sensors.

The supplied devices are:

• SME70

• CVS-P-24-O RGDAT sensors

• Cable for UP connection

• Support shelf for sensors

• Junction box

• Fixing bracket for junction box

• Corrugated tube

—General info

SME70-O fault detection system is designed in conformity with the ENEL GSTP001 speciﬁcation; it

is installed in outdoor application in order to provide local and remote signalling of short circuit and

earth faults that may occur in MV distribution networks. SME70-O quickly locates the line section

affected by the fault thus reducing power outage.

SME70-O can operate with:

• insulated neutral

• neutral earthed through an inductance with in parallel a resistor

• neutral earthed through an resistor

• neutral directly earthed

The networks characteristics are:

• Rated voltage: from 6 kV to 25kV ±10%

• Maximum current of three-phase short circuit: 20 kA

• Maximum value of time constant t of the phase unidirectional component decay: 2 ms

• Maximum single phase ground fault current (insulated neutral earth): 500 A

• Maximum single phase ground fault current (neutral earthed through a resistor): 1000 A

• Maximum single phase ground fault current (neutral earthed through an inductance): 1000 A

• Maximum single phase ground fault current (neutral directly earthed): 20 kA

• Peak value of the unidirectional component of the current added to single phase ground fault cur-

rent (neutral compensated ): 707A

• Maximum value of time constant t of the residual unidirectional component decay: 150 ms

• Zero sequence Voltage in healthy network condition: (0-5)% of Ph-E Voltage

• Harmonic content in current: within prescribed limits by EN50160

• Rated frequency 50 Hz or 60 Hz

• Frequency range fn=50 Hz 47,5Hz÷51,5 Hz

• Frequency range fn=60 Hz 57,5Hz÷61,5 Hz

SME70-O devices detect faults between phases and earth failures both on insulated neutral net-

works and on compensated neutral networks, without any need of changing the settings between

different conﬁgurations and regardless of the feeding direction.

The correct detection of the fault direction also occurs in the presence of intermittent faults.

SME70-O devices check the voltage of the three phases of the MT line and indicates whether it is ON

or OFF; a current converter is also available with an impressed current output of 4...20 mA for sending

the phase current measurement to the remote control terminal.

—Protective functions

The following protective functions are provided:

• 27V1 Direct sequence undervoltage (27Vd)

• 51 Phase overcurrent

• 51N Residual overcurrent

• 59V2 Inverse sequence overvoltage (59Vi)

• 67N Directional ground fault overcurrent

• 59 Voltage presence

• 59N Residual overvoltage (59V0)

4SME70-O-Manual-04-2020

MAIN FEATURES

SME70-O panel

The panel is suitable for projecting assembly. The front includes signalling LEDs, the RS232 commu-

nication port is accessible by opening the front cover.

Sensors

3 outdoor integrated sensors for measuring phase currents and voltages

Residual voltage

The residual voltage is computed through vector sum of phase voltages.

Sensors connections

The sensors must be connected to the MA RJ45 connectors located inside the SME70-O panel.

Remote control unit

Remote control unit connections are implemented according with ENEL speciﬁcation; they are abut-

ted to the terminal board MB at the factory according to the connection diagram inside the device

cover.

RS232 communication

The device provides a serial interface to allow a PC connection for installation, conﬁguration, moni-

toring, ﬁrmware upgrade and diagnostic.

X21 and X22 jumpers realise, according to Cyber Security requiremments, the RS232 access protec-

tion against unwanted third parties manipulation.

X21 X22 Action

CLOSE CLOSE RS232 Read/Write ENABLE

OPEN OPEN RS232 Read/Write DISABLE

Binary input

In Standard mode, the reversal of the direction of directional earth fault (67N) can be enabled; in

voltage monitoring mode the binary input may be used as trigger to acquire the state of the line

voltages.

FUNCTION CHARACTERISTICS

SME70-O devices perform its fault detection functions based on measure of line currents and phase

voltages.

Earth single-phase fault

directional detection function

(67N)

The function detects the occurrence of earth faults both on insulated neutral networks and on com-

pensated neutral networks, without any need of changing settings when changing type of network.

The algorithm is based on the numerical analysis of signals (FFT) through fast sampling (64 samples

per period) and phase locking algorithm (PLL); in this way the quantities are correctly measured in

Through external signal from the remote control system, it is possible to control the reversal of the

reference direction in case of line feeding from the opposed side (secondary station bar tripping

directionality); the reversal signal is provided by the remote control system through the closing of a

contact connected to terminals 8 and 9 of the MB terminal board.

The fault signal (TS67AV) is provided to the remote control unit by the closing of a contact connected

to terminal 5 of the MB terminal board.

The sensitivity of the earth directional function depends on the extension of the line and on the neu-

tral status (insulated or with Petersen coil).

The setting is based on the adjusting of a V0>residual voltage[1] threshold and a I0zero sequence

current[2].

The protective element detects the directional earth fault if all the following conditions occur:

• Residual voltage exceeds the V0> threshold

• Residual current exceeds the I0> threshold

• Residual current - residual voltage displacement inside the trip sector (I0lags behind to V0with

reversed direction disabled)

• All the above conditions were met for almost 80 ms

Double earth single-phase

or phase-phase (short circuit)

fault detection function (51)The phase currents are measured and fault indication is provided when current in at least one phase

exceeds the set threshold a:

• 100...900 A for multi-phase faults (51)

• 10...600 A for double earth-phase faults (51N)

The fault signal (TS51A) is provided to the remote control unit by the closing of a contact connected

to terminal 2 of the MB terminal board.

Note 1 The residual voltage V0is the vector sum of the three phase voltages divided by three.

Note 2 The residual current I0is the vector sum of the three phase currents.

SME70-O-Manual-04-2020

Residual voltage detection

function (59V0)The residual voltage is calculate from the three phases voltages; when the voltage value overcomes

the threshold the TS67AV information is provided to the remote control unit by the closing a contact

connected to terminal 5 of the MB terminal board.

Negative sequence overvoltage

(59Vi)

The negative sequence voltage is calculate from the three phases voltages; when the voltage value

overcomes the threshold the TS67AV information is provided to the remote control unit by the closing

a contact connected to terminal 5 of the MB terminal board.

Positive sequence overvoltage

(59Vd)The positive sequence voltage is calculate from the three phases voltages; when the voltage value

overcomes the threshold the TS67AV information is provided to the remote control unit by the closing

a contact connected to terminal 5 of the MB terminal board.

Endesa FunctionalitySME70-O permits, setting in \Set\Base\Mode the endesa mode. to enable Endesa functionality. In

this mode:

• The command of the 51 relay is issued only when, after tripping of thresholds 51,51N or 67NS2, the

condition of “Voltage Absent” is detected within a certain time (T1, programmable in \Set\Endesa,

default setting: 1 s)

• The command of 67 relay is issued only when, after triping of thresholds 67NS1. the condition of

“Voltage Absent” is detected within a certain time (T1, programmable in \Set\Endesa, default set-

ting: 1 s)

• The return to quiescent mode of 51 and 67 relays occour when “Voltage Presence” condition is

detected and hold to a certain time (T2, programmable in \Set\Endesa, default setting: 10s)

• If there is no return of power within a certain time (T3 programmable in \Set\Endesa, default setting:

4 hours), outputs contacts 51 and 67 return to quiescent status anyway

According to this description of the Endesa Functionality, LED 51 and 67 must follow the state of re-

spective relay and event logging also records the issuance of command to relay 51 and 67, in addition

to tripping of various thresholds.

Voltage presenceThe three phases voltages are measured; when at least one voltage value is higher than 80% of the

rated voltage the information (TSV) is provided to the remote control unit by the closing of a contact

connected to terminal 3 of the MB terminal board.

Current converterThe SME70 device is provided with an impressed current analogue output for sending the phase cur-

rent measure to the remote control unit. Signal 4...20 mA is available for transfer to the remote control

unit on terminals 4 (M1 connected to the positive auxiliary power) and 7 (M2 of terminal board MB).

The rated primary current is adjustable inside the 100...1000 A range with 10 A step.

Output relay commissioning• TS51A relay: phase fault (double single-phase earth fault)

• TS67AV relay: directional earth fault - line side (with inversion command disabled)

• TSV relay: voltage presence indication

The TS51A and TS 67AV output relays trip with faults that cause the circuit breaker open as for

transient faults. The relays can be programmed with normally energized or de-energized mode (logic

ENERGIZED / DE-ENERGIZED). The state of the relay is maintained for the duration of the fault and

for a minimum of 150 ms.

LED indicators managementSME70-O device is provided with 8 indicator LEDs:

• 3 green LEDs indicating that V4, V8, V12 phase voltages are ON

• 1 white LED indicating the direction reversal for the directional earth protection

• 1 red multiphase or single phase current function trip (51A)

• 1 red LED indicating the earth fault function trip downstream of the device (67)

• 1 red LED residual current (51N)

• 1 green LED indicating auxiliary power (fix ON)

The fault indicator LEDs light up when a fault occurs (circuit breaker open), and they remain lit

(latched) until the phase voltages return (circuit breaker closed); latch may be extended for a pro-

grammable time (0 ... 238 hours) counted from the closing of the circuit breaker. The Trip Led Reset

Delay may be adjusted inside the Set \ Base menu.

The V4, V8, V12 LEDs, light up if the voltage of the relative phase is greater than 0.8 Vn and go OFF

when the voltage is less than 0.2 Vn; in Voltage monitoring mode voltage presence is indicated by a

ﬂashing / LED relative to the corresponding phase.

6SME70-O-Manual-04-2020

TECHNICAL DATA

GENERAL

—Measuring relays and protection equipment

Reference standards IEC 60255-1, GSTP001 rev.01

—Mechanical data

• Phase current/voltage sensor GSTP001

• SME70 device mounting Projecting

Reference standards EN 60529, EN 60529/A1

Protection degree IP31

Mass:

• Phase current about 0.3 kg

• SME70 device (with remote control cable) 1.2 kg

—Insulation test

Reference standards EN 60255-5, IEC 60255-27

High voltage test (50 Hz 60 s)

• Auxiliary power supply 2 kV

• Input circuits 2 kV

• Output circuits 2 kV

• Output circuits (between open contacts) 1 kV

Impulse voltage withstand test (1.2/50 µs):

• Auxiliary power supply 5 kV (common mode)-2 kV (differential mode)

• Input circuits 5 kV (common mode)-2 kV (differential mode)

• Output circuits 5 kV (common mode)-2 kV (differential mode)

Insulation resistance >100 MW

—EMC tests for interference immunity

Reference standards IEC 60255-26, EN 60255-26

Electromagnetic compatibility requirements for measuring relays and protection equipment

Electromagnetic compatibility (EMC) - Generic standards EN 61000-6-2

Apparati di automazione e controllo per centrali e stazioni elettriche (ENEL utility standard)

• Compatibilità elettromagnetica - Immunità ENEL REMC 02

• Normativa di compatibilità elettromeccanica per apparati e sistemi ENEL REMC 01

Reference standards EN 60255-22-1 IEC 60255-22-1

EN 61000-4-12 EN 61000-4-12

EN61000-4-18

Damped oscillatory wave

• 0.1 MHz and 1 MHz common mode 1.0 kV

• 0.1 MHz and 1 MHz differential mode 0.5 kV

• Ring wave common mode 2.0 kV

• Ring wave differential mode 1.0 kV

Reference standards EN 60255-22-2 IEC 60255-22-2

EN 61000-4-2 IEC 61000-4-2

Electrostatic discharge

• Contact discharge 6 kV

• Air discharge 8 kV

Reference standards EN 60255-22-3 IEC 60255-22-3

EN 61000-4-3 IEC 61000-4-3

Radiated radio-frequency ﬁelds

• 80...3000 MHz AM 80% 10 V/m

• 900, 1890 MHz Pulse modulated 10 V/m

Reference standards EN 60255-22-4 IEC 60255-22-4

EN 61000-4-4 IEC 61000-4-4

Fast transient burst (5/50 ns)

• Auxiliary power supply 4 kV

• Input circuits 4 kV

Reference standards EN 60255-22-5 IEC 60255-22-5

EN 61000-4-5 IEC 61000-4-5

High energy pulse

• Uaux (line-to-ground 10 ohm, 9 mF) 2 kV

• Uaux (line-to-line 0 ohm, 18 mF) 1 kV

• I/O ports (line-to-ground 40 ohm, 0.5 mF) 2 kV

• I/O ports (line-to-line 40 ohm, 0.5 mF) 1 kV

Reference standards EN 60255-22-6 IEC 60255-22-6

EN 61000-4-6 IEC 61000-4-6

SME70-O-Manual-04-2020

Conducted radio-frequency ﬁelds

• 0.15...80 MHz AM 80% 1kHz 10 V

Reference standards EN 60255-22-7 IEC 60255-22-7

EN 61000-4-16 IEC 61000-4-16

Power frequency

• DC voltage 30 V

• 50 Hz continuously 30 V

• DC voltage 1 s 300 V

• 50 Hz 1 s 300 V

• 0.015...150 kHz 10-1-1-10 V

Reference standards EN 61000-4-8 IEC 61000-4-8

Magnetic ﬁeld 50 Hz

• 50 Hz continuously 100 A/m

• 50 Hz 1 s 1 kA/m

Reference standards EN 61000-4-10 IEC 61000-4-10

Damped oscillatory magnetic ﬁeld

• Damped oscillatory wave 0.1 MHz 30 A/m

• Damped oscillatory wave 1 MHz 30 A/m

—Mechanical tests

Reference standards EN 60255-21-1 EN 60255-21-2 RMEC01

Vibration, shock, bump and seismic tests on measuring relays and protection equipment

• EN 60255-21-1 Vibration tests (sinusoidal) Class 1

• EN 60068-2-64 Vibration tests broad band (random) Class 1

—IP protection grade tests

Reference standards EN 60529

• IP grade (case) IP31

—Climatic tests

Reference standards IEC 60068-x ENEL R CLI 01 CEI 50

Environmental testing

Ambient temperature -25...+70 °C

Storage temperature -40...+85 °C

Relative humidity 10...95 %

Atmospheric pressure 70...110 kPa

—Safety

Reference standards IEC 60255-27

Pollution degree 3

Reference voltage 250 V

Overvoltage category III

—Certifications

Product standards EN 50263

CE Conformity

• EMC Directive 2014/30/EC

• Low Voltage Directive 2014/35/EC

Type tests IEC 60255-1

—Cyber Security

• Security Guideline GICT-SGL_12_v01_OCS OT

8SME70-O-Manual-04-2020

INPUT CIRCUITS

—Auxiliary power supply Uaux

Rated voltage 24 V-

Nominal value (range) 19.2...28.8 V-

Max alternating component 10%

Maximum time at power ON 0.10 s

Power consumption at rest condition 2.5 W

Max power consumption <3 W

—Rated frequency

nRated value 50, 60 Hz (sw setting)

Range 47.5...51.5 Hz (fn= 50 Hz)

57.5...61.5 Hz (fn= 60 Hz)

—Integrated outdoor sensors

Type CVS-P-24-O RGDAT

Rated frequency 50/60Hz

Bandwidth 30Hz ... 5kHz

Connection to SME70-O

• type FTP 8 wires cable

• connector RJ45

• length 8 m

Current

Rated current 300A

Rated transformation ratio 3650A/1V

Rated permanent thermal current 1.2 Ipr

Ratet shortcircuit thermal current 12.5kA for 1s

Rated dynamic current 31.5kA

Voltage

Rated voltage 20 √3 kV

Rated transformation ratio 25kV/1V

Permanent overvoltage factor 1.9 Upr/8h

Rated primary capacity 1.3pF

—Binary input

Quantity 1

Type optocoupler

Operative range rated Uaux

Max consumption, energized 3 mA

OUTPUT CIRCUITS

—Relays

Quantity 3

Type of contacts make (SPST-NO, type A)

Nominal current 2 A

Nominal voltage 250 V

Breaking capacity (24 V, L/R = 40 ms) 0.2 A

Minimum switching load 300 mW (5 V/5 mA)

Each output relay is independently programmable as normally energized or de-energized (ENER-

GIZED/DE-ENERGIZED)

—Current converter

Operating range 100...1000 A (step 10 A)

Output current 4...20 mA

With 67N element active inside the no trip sector 0 mA

Accuracy 10%

Max load 750 Ω

Maximum response time 300 ms

CONNECTION TO THE REMOTE CONTROL UNIT

Type 9 wires multipolar cable

Section 1 mm2

Length 8 m

LEDs

—Signalling LEDs

Voltage presence (V4) green LED

Voltage presence (V8) green LED

Voltage presence (V12) green LED

67N trip direction (INV 67) white LED

Trip 51 (51A) red LED

Tripe 67N (67AV) red LED

Trip 51N (51N) red LED

Run (ON) green LED

SME70-O-Manual-04-2020

COMMUNICATION INTERFACE

—Local port

Connection 9 pin

Rate 9600 Bps

Parity None

Protocol ModBus RTU®

PROTECTION AND CONTROL FUNCTIONS

—Positive sequence undervoltage - 27V1 (27Vd)

U1< threshold 0.2...1.10 En (step 0.01 En)

t1< operate time (inverse time characteristic) 0.0...60.0 s (step 0.1 s)

Start time 0.045 s

Operation

The positive sequence voltage is compared with the threshold. If voltage under the pickup value is

detected a start is issued and, after expiry of the associated operate time, a trip command (67N relay)

is issued; if however the voltage increases beyond the threshold the element is restored.

—Negative sequence overvoltage - 59V2 (59Vi)

U2> threshold 0.01...0.40 En (step 0.01 En)

t2> operate time (inverse time characteristic) 0.0...60.0 s (step 0.1 s)

Start time 0.045 s

Operation

The positive sequence voltage is compared with the threshold. If voltage over the pickup value is

detected a start is issued and, after expiry of the associated operate time, a trip command (67N relay)

is issued; if however the voltage drop below the threshold the element is restored.

—Residual overvoltage - 59VN (59V0)

UE> threshold 0.01...0.40 En (step 0.01 En)

tE> operate time 0.0...60.0 s (step 0.1 s)

Start time 0.045 s

U1<

tU1<

TRIP

General operation time characteristic for the positive sequence undervoltage element - 27V1

U2>

tU2>

General operation time characteristic for the negative sequence overvoltage element - 59

TRIP

t-int-F59N.ai

tUE>

UE>

TRIP

General operation time characteristic for the residual overvoltage element - 59V0

10 SME70-O-Manual-04-2020

Operation

The residual voltage is compared with the threshold. If voltage over the pickup value is detected a

start is issued and, after expiry of the associated operate time, a trip command (67N relay) is issued;

if however the voltage drop below the threshold the element is restored.

—Voltage presence

Two thresholds are provided:

• 80% of rated voltage for trip (4% accuracy),

• 20% of rated voltage for reset (4% accuracy).

The transition between the states of presence / absence voltage is described:

• Starting from the no voltage condition (Voltage Presence OFF), the logic state of supply voltage is

detected when, for at least 250 ms the following condition is true:

(V4>80%Vn) OR (V8>80%Vn) OR (V12>80%Vn)

• Starting from the condition of Voltage Presence ON, the logic state is no longer recognized if the

following condition is true:

(V4<20%Vn) AND (V8<20%Vn) AND (V12<20%Vn) without intentional delay.

U> threshold 0.80 En

Voltage absence threshold 0.20 En

Operate time 0.25 s

Operation

The voltage presence is indicated by through the TSV relay and the corresponding LED (V4, V8, V12)

—Overcurrent - 51

I> threshold (1) 100...900 A (step 10 A)

t> otime delay 0.000....1.000 s (step 0.005 s)

Start time 0.045 s

Dropout ratio > 0.95

Reset delay 0.02 s

Duration of the fault not detected 0.04 s

Duration of the fault detected 0.08 s

Threshold accuracy ±10%

Operate time accuracy ± 10 ms

0.2 Un

0.8 Un

Voltage presence (59)

LED V4

V4, V8, V12

V12

0.25s

LED V8

LED V12

TRIP

0.045

General operation time characteristic for the phase overcurrent element - 51

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