NA60 - flayer - 08 - 2006

ApplicationThe relay type NA60 can be typically used in radial or meshed MV and LV networks as feeder or power transformer protection:

on radial, ring and parallel feeders of any length in solidly grounded, ungrounded, Petersen coil and/or resistance grounded systems,on parallel connected generators on the same busbar.

Moreover undervoltage and overvoltage functions are provided as protections or voltage controls.

Protective functions27 Undervoltage49 Thermal image50/51 Phase overcurrent50N/51N Residual overcurrent59 Overvoltage59N Residual overvoltage67 Directional overcurrent67N Directional ground faultBf Circuit breaker failure

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Measuring inputsThree phase current inputs and one residual current input, with nominal currents independently selectable at 1A or 5A through DIP-switches.Three phase voltage inputs with programmable nominal voltag-es within range 50...130 V (UR=100V) or 200...520 V (UR=400V) and one residual voltage input, with programmable nominal voltage within range 50...130 V (UER=100V).

ConstructionAccording to the hardware configurations, the NA60 protection relay can be shipped in various case styles depending on the required mounting options (flush, projecting mounting, rack or with separate operator panel).

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phase & res idual overcurrent, phase & G round d irect ional , t h e r m a l i m a G e , u n d e r / o v e r v o lta G e p r o t e c t i o n r e l ay

50N 51N

49 50 51 74CT

52

74TCS BF

67N

METERING- IL1..IL3,IθL1..,IE,UE,ϕE..- Oscillography

COMMUNICATION- RS232- Modbus RS485- Modbus TCP/IP- IEC 870-5-103

Control functions & Logic selectivity

NA60

59N

67

74VT5927

NA60 - flayer - 08 - 2006 2

Control and monitoringSeveral predefined functions are implemented:

Activation of two set point profilesPhase CTs monitoring (74CT)Phase VTs monitoring (74VT)Logic selectivityCold load pickup (CLP) with block or setting changeTrip circuit supervision (74TCS)Second harmonic restraint (inrush)Remote trippingSynchronizationCB commands and diagnostic

Firmware updatingThe use of flash memory units allows on-site firmware updating.

MeteringNA60 provides metering values for phase and residual currents and residual voltage, making them available for reading on a dis-play or to communication interfaces.Input signals are sampled 24 times per period and the RMS value of the fundamental component is measured using the DfT (Dis-crete fourier Transform) algorithm and digital filtering.With DfT the RMS value of 2nd, 3rd, 4th and 5th harmonic of phase current are also measured.On the base of the direct measurements of the phase currents, the minimum-peak-fixed-rolling demand, mean-minimum-maxi-mum absolute phase currents are processed.The measured signals can be displayed with reference to nomi-nal values or directly expressed in Ampères and Volts.

Setting safetyTwo session level (User or Administrator) with password for sen-sible data access.

Logic selectivityWith the aim of providing a selective protection system, some protective functions may be blocked (pilot wire accelerated log-ic). To guarantee maximum fail-safety, the relay performs a run time monitoring for pilot wire continuity and pilot wire shorting. for long distances, when high insulation and high EMC immunity is essential, a suitable pilot wire to fiber optic converter (BfO) is available.

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Modular designIn order to extend I/O capability, the NA60 hardware can be cus-tomized through external auxiliary modules:

output relays and LEDsbinary inputsblocking signals (logic selectivity)4...20 mA converters.

Fault recording (Oscillography)Upon trigger of tripping/starting of each function or external signals, the relay records in COMTRADE format more than 300 events with 1 ms acquisition rate and 0.5 s recording time (0.25 pre fault time).

CommunicationMultiple communication interfaces are implemented:

a RS232 local communication front-end interface, used for protection management, viewing and changing the relay pro-gramming, obtaining readings of the logic states, the chrono-logical events, measuring, and for relay testing and resetting commands;two back-end interfaces for communication with remote moni-toring and control systems by:- RS485 using ModBus® RTU or IEC 60870-5-103 protocol,- Ethernet port (RJ45 or optical fiber) using ModBus/TCP protocol.

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BLOUTS1

S3

S2

BLIN(S3)

BLIN(S2)

NA10

NA60 NA60 NA60 NA60NA60NA60

NA60 NA60

NA60

NA10NA10

Ring main logic selectivity

NA60 - flayer - 08 - 2006 3

MMI (Man Machine Interface)The user interface comprises a membrane keyboard, a backlight LCD alphanumeric display and eight LEDs.The green ON LED indicates auxiliary power supply and self di-agnostics, two LEDs are dedicated to the Start and Trip (yellow for Start, red for Trip) and five red LEDs are user assignable.

Binary inputsTwo binary inputs are available with programmable active state (active-ON/active-Off) and programmable timer (active to Off/ON or ON/Off transitions).Several presettable functions can be associated to each input.

Cold Load Pickup (CLP)To prevent unwanted tripping of the protective functions on tem-porary overcurrent (i.e. load startings), the CLP function can be used with two different operating modes:

each threshold can be blocked for a programmable timeeach threshold can be changed for a programmable time.

Programming and settingsAll relay programming and adjustment operations may be per-formed through MMI (Keyboard and display) or using a Personal Computer with the aid of the ThySetter software.

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Output relaysSix output relays are available (two changeover and four make contacts); each relay may be individually programmed as nor-mal state (normally energized, de-energized or pulse) and reset mode (manual or automatic). A programmable timer is provided for each relay (minimum ac-tivation time).The user may program the function of each final relay in accor-dance with a matrix (tripping matrix) structure.

Circuit BreakerSeveral diagnostic, monitoring and control functions are provided:

health thresholds can be set; when the accumulated duty (SI or SI2) or the number of opening operations exceeds the threshold an alarm is activatedtrip time (mechanism); if the trip time is too long, a diagnostic alarm is issuedposition; if a 52a-52b discrepancy is detected, the relative alarm goes ONbreaker failure (Bf); breaker status is monitored by means 52a-52b and/or through line current measurementsbreaker control; opening and closing commands can be car-ried out locally or remotelytrip circuit supervision (74TCS).

Second harmonic restraintTo prevent unwanted tripping of the protective functions on transformer inrush current, the protective elements can be blocked when the ratio between the second harmonic current and the relative fundamental current is larger than a setting threshold.The function can be programmed to switch an output relay so as to cause a blocking protection relays lacking in second har-monic restraint.

Self diagnosticsAll hardware and software functions are repeatedly checked and any anomalies reported via display messages, communica-tion interfaces, LEDs and output relays. Anomalies may refer to:

hw faults (auxiliary power supply, output relay coil interrup-tions, MMI board...)sw faults (boot and run time tests for data base, EEPROM memory checksum failure, data BUS,...)

• pilot wire faults (break or short in the wire)• Circuit breaker faults.

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ThySetter

NA60 - flayer - 08 - 2006 4

S P E C I f I C A T I O N S GENERAL

Mechanical dataMounting: flush, projecting, rack or separated operator panelMass (flush mounting case) 2.0 kg Insulation testsReference standards EN60255-5High voltage test 50Hz 2 kV 60s Impulse voltage withstand (1.2/50 ms) 5 kVInsulation resistance >100 MW Voltage dip and interruptionReference standards EN61000-4-29 EMC tests for interference immunity1 MHz damped oscillatory wave EN60255-22-1 1 kV-2.5 kVHigh energy pulse EN61000-4-5 2 kV-400 ADamped oscillatory wave EN61000-4-12 2.5 kVRing wave EN61000-4-12 2 kVfast transient burst (5/50 ns) EN60255-22-4 4 kVConducted common mode EN61000-4-16 30 VElectrostatic discharge EN60255-22-2 8 kVMagnetic field 50 Hz EN61000-4-8 1 kA/mConducted radio-frequency fields EN60255-22-6 10 VRadiated radio-frequency fields EN60255-4-3 10 V/m EmissionReference standards EN61000-6-4 (ex EN50081-2)Conducted emission 0.15...30 MHz Class ARadiated emission 30...1000 MHz Class A Climatic testsReference standards IEC60068-x, ENEL R CLI 01, CEI 50 Mechanical testsReference standards EN60255-21-1, 21-2, 21-3

Safety requirementsReference standards EN61010-1Pollution degree 3Reference voltage 250 VOvervoltage IIIPulse voltage 5 kVReference standards EN60529Protection degree: - front side IP51 - rear side, connection terminals IP20

Environmental conditions Ambient temperature -25...+55 °CStorage temperature -40...+85 °CRelative umidity 10...95 %Atmospheric pressure 70...110 kPa

CertificationsCE conformity- Product standard for measuring relays EN50263 EMC Directive 89/336/EEC Low Voltage Directive 73/23/EEC

- Type tests IEC 60255-6

INPuT CIRCuITS

Auxiliary power supply uauxNominal value 24...48 Vac/dc 115...230 Vac/110...220 VdcRange (each one of the above nominal values) 19...60 Vac/dc 85...265 Vac/75...300 VdcPower consumption: - maximum (energized relays, Ethernet TX) 10 W (20 VA) - maximum (energized relays, Ethernet fX) 15 W (25 VA) Phase current inputsNominal current I N 1 A or 5 A selectable by DIP SwitchesPermanent overload 20 AThermal overload (1s) 500 ARated consumption (for any phase) ≤ 0.2 VA

Residual current inputNominal current I EN 1 A or 5 A selectable by DIP SwitchPermanent overload 25 AThermal overload (1s) 500 ARated consumption ≤ 0.2 VA Voltage inputsReference voltage U R 100 V or 400 V selectable on orderNominal voltage U N 50...130 V or 200...520 V selectable by swPermanent overload 2 U R1s overload 2 URRated consumption (for any phase) ≤ 0.5 VA Residual voltage inputReference voltage U ER 100 VNominal voltage U EN 50...130 V selectable by swPermanent overload 2 U ER1s overload 2 U ERRated consumption ≤ 0.5 VA

Binary inputsQuantity 2 Type wet inputsMax permissible voltage 19...265 Vac/19...300 VdcMax consumption, energized 3 mA

Block input (Logic selectivity)Quantity 1Type dry inputs (powered by internal isolated supply) Max consumption, energized 5 mA

OuTPuT CIRCuITS

Output relays K1...K6 Quantity 6- type of contacts K1, K2 changeover (SPDT, type C) - type of contacts K3, K4, K5 make (SPST-NO, type A) - type of contacts K6 break (SPST-NC, type B)Nominal current 5 ANominal voltage 250 VBreaking capacity:- direct current (L/R = 40 ms) 30 VA - alternating current (l = 0,4) 40 W Make 1000 W/VAShort duration current (0,5 s) 15 A Block output (Logic selectivity)Quantity 1Type optocoupler

LEDsQuantity 8- ON/fail (green) 1- Start (yellow) 1- Trip (red) 1- Allocatable (red) 5

NA60 - flayer - 08 - 2006 5

COMMuNICATION INTERFACES

Local PC RS232 19200 bps Network: - RS485 1200...57600 bps - Ethernet 100BaseT 100 Mbps Protocol ModBus® RTU-TCP/IP IEC 60870-5-103

GENERAL SETTINGS

Nominal valuesPhase nominal current I N 1A, 5APhase CTs nominal primary current I NP 1A...10 kAResidual nominal current I EN 1A, 5AResidual CT nominal primary current I ENP 1A...10 kANominal voltage U N 50...130V or 200...520VPhase VTs nominal primary voltage U NP 50V...500 kVResidual nominal voltage U EN 50...130VResidual VT nominal primary voltage U ENP 50V...500 kVNominal frequency f N 50, 60 Hz

CB diagnosticOperation counts 0...10000Contact interrupting duty SI 0...5000 INTrip time (SI2t evaluation) 0.050...1.000 sContact interrupting duty SI2t 0...5000 (IN)2.sCB discrepancy time 0.010...10.000 sTrip time (mechanism) 0.050...1.000 s

CLP (Cold Load Pickup)CB trip delay time t CBCLP 0.000...1.000 s

Binary input timersBinary inputs ON delay time t IN1ON, t IN2ON 0.00...100.0 sBinary inputs Off delay time t IN1Off, t IN2Off 0.00...100.0 s

Output relay timersK1...K6 minimum activation time t TR1... t TR6 0.00...500.0 s

FuNCTIONS

undervoltage (27)Pickup U< (definite-time characteristic) 0.30...1.20 UNTime delay tU< (definite-time characteristic) 0.05...200 s Overvoltage (59)Pickup U>, U>> (definite-time characteristic) 0.60...1.20 UNTime delays tU>, tU>> (definite-time characteristic) 0.05...200 s Thermal image (49)Base current IB 0.10...2.00 INPickup Dq> 1.2 DqBAlarm Pickup DqAL1 0.3...1.0 DqBAlarm Pickup DqAL2 0.3...1.0 DqBInitial thermal imageDqIN 0.0...1.0 DqBOverload coefficient at starting KINR 1.0...3.0Thermal time constant t 1...200 min

Phase overcurrent (50/51)Pickup I> (definite-time characteristic) 0.100...10.00 INTime delay t > (definite-time characteristic) 0.03...200 sPickup I> (IEC A,B,C,I2t inverse-time) 0.100...10.00 INTime delay t > (IEC A,B,C,I2t inverse-time) 0.10...60.0 sPickup I>CLP 0.100...10.00 INTime delay t >CLP 0.03...100 sPickup I>> (definite-time characteristic) 0.100...40.0 IN Time delay t >> (definite-time characteristic) 0.03...10.00 sPickup I>> (I2t inverse-time characteristic) 0.100...20.0 INTime delay t >> (I2t inverse-time characteristic) 0.03...10.00 sPickup I>>CLP 0.100...40.0 INTime delay t >>CLP 0.03...100 sPickup I>>> (definite-time characteristic) 0.100...40.0 INTime delay t >>> (definite-time characteristic) 0.03...10.00 sPickup I>CLP 0.100...40.0 INTime delay t >>>CLP 0.03...100 s

Residual overcurrent (50N/51N)Pickup IE> (definite-time characteristic) 0.002...2.00 IENTime delay tE> (definite-time characteristic) 0.03...200 sPickup IE> (IEC A,B,C inverse-time) 0.002...2.00 IENTime delay tE> (IEC A,B,C inverse-time) 0.10...60.0 sPickup IE>CLP 0.002...2.00 IENTime delay tE>CLP 0.03...100 sPickup IE>> (definite-time characteristic) 0.002...8.00 IENTime delay tE>> (definite-time characteristic) 0.03...10.0 sPickup IE>>CLP 0.002...8.00 IENTime delay tE>>CLP 0.03...100 sPickup IE>>> (definite-time characteristic) 0.002...8.00 IENTime delay tE>> (definite-time characteristic) 0.03...10.0 sPickup IE>>>CLP 0.002...8.00 IENTime delay tE>>>CLP 0.03...100 s Residual overvoltage (59N)Pickup UE>, UE>> (definite-time characteristic) 0.01...0.20 UENTime delays tUE>, tUE> (definite-time characteristic) 0.05...200 s

Directional phase overcurrent (67)Characteristic angle q 0...90°Pickup Iq> (definite-time characteristic) 0.100...10.00 I NTime delay tq> (definite-time characteristic) 0.05...200 sPickup Iq> (IEC A,B,C,I2t inverse-time) 0.100...10.00 I NTime delay tq> (IEC A,B,C,I2t inverse-time)) 0.10...60.0 sPickup Iq>CLP 0.100...10.00 INTime delay tq> CLP 0.03...100 sPickup Iq>> 0.100...40.00 I NTime delay tq>> (definite-time characteristic) 0.03...10.0 sPickup Iq>>CLP 0.100...40.0 INTime delay tq>>CLP 0.03...100 sPickup Iq>>> 0.100...40.00 I NTime delay tq>>> (definite-time characteristic) 0.03...10.0 sPickup Iq>>CLP 0.100...40.0 INTime delay tq>>CLP 0.03...100 s Directional earth fault overcurrent (67N)Pickup I ED> (definite-time characteristic) 0.002...10.00 IENTime delay tED> (definite-time characteristic) 0.03...200 sPickup I ED> (IEC A,B,C inverse-time) 0.002...10.00 I ENTime delay tED> (inverse-time characteristic) 0.10...60.0 sPickup U ED> 0.004...0.500 U ENCharacteristic angle qE> 0...359 °Maximum deviation from the characteristic angle b> 0...180°Pickup I ED>> 0.002...10.00 IENTime delay tED>> (definite-time characteristic) 0.05...200 sPickup U ED>> 0.004...0.500 U ENCharacteristic angle qE>> 0...359 °Maximum deviation from the characteristic angle b>> 0...180°Pickup I ED>>> 0.002...10.00 IENTime delay tED>>> (definite-time characteristic) 0.05...200 sPickup U ED>>> 0.004...0.500 U ENCharacteristic angle qE>>> 0...359 °Maximum deviation from the characteristic angle b>>> 0...180°

Breaker failure (BF)Pickup IBf> 0.05...1.00 INPickup IEBf> 0.002..2.00 IENTime delay t Bf (definite-time characteristic) 0.01...10.00 s52a/52b mode 52a or 52b

CT monitoring (74CT)Pickup S< (ILMIN/ ILMAX) 0.10...0.95Pickup I*> 0.10..1.00 INTime delay t S (definite-time characteristic) 0.03...200 s

VT monitoring (74VT)Pickup U2VT> 0.05..0.50 UNPickup I2VT> 0.05..0.50 INPickup U VT< 0.05..0.50 UNPickup U VT> 0.05..0.50 UNPickup D IVT< 0.05..0.50 INPickup IVT> 0.10..40.0 INTime delay t VT-AL (definite-time characteristic) 0.0...10.0 s

NA60 - flayer - 08 - 2006 6

Logic selectivity50/51 block out drop-out time delay tfI> 0.00...1.00 s50N/51N block out drop-out time delay tfI E> 0.00...1.00 s50/51 block in drop-out time delay tBI> 0.10...10.00 s50N/51N block in drop-out time delay tBI E> 0.10...10.00 sOutput pulse repetition period 0.05-0,1-1-10-30 sInput pulse window 0.05-0,1-1-10-30 s

Second harmonic restraintI2NDH> (I2nd /IL) 0.10...0.50

METERING

Measured parametersPhase currents:

fundamental RMS values IL1, IL2, IL3 2nd harmonic components IL1-2nd, IL2-2nd, IL3-2nd3rd harmonic components IL1-3rd, IL2-3rd, IL3-3rd4th harmonic components IL1-4th, IL2-4th, IL3-4th5th harmonic components IL1-5th, IL2-5th, IL3-5thEquivalent thermal current IthPositive and negative sequence values I1, I2Directional components of input currents IqL1, IqL2 IqL3Thermal image DqPeak demand RMS values IL1MAX, IL2MAX, IL3MAXMinimum demand RMS values IL1MIN, IL2MIN, IL3MINfixed demand RMS values IL1fIX, IL2fIX, IL3fIXRolling demand RMS values IL1ROL, IL2ROL, IL3ROLMean (IL1+IL2+IL3)/3 ILMax RMS value ILMAXMin RMS value ILMIN

Residual currentfundamental RMS value IE3rd harmonic component IE-3rdphase displacement between residual voltage and current jE

Voltages:fundamental phase-to-earth RMS values UL1, UL2, UL3 fundamental phase-to-phase RMS values U12, U23, U31fundamental residual RMS value UENegative sequence value U2

frequency f

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Oscillographyfile format COMTRADERecords >300 [1]Recording mode linearSampling rate <1 msTrigger setup:

source binary input communication (ThySetter) outputs (K1...K6)

pre-trigger time 0.05...1.00 spost-trigger time 0.05...60.00 s

Data recorded on sampled channels: instantaneous currents iL1, iL2, iL3, iEinstantaneous voltages uL1, uL2, uL3, uE

Data recorded on analog channels: frequency fRMS currents IL1, IL2, IL3, IE, I1,I2, IqL1, IqL2 IqL3second harmonic RMS currents IL1-2nd, IL2-2nd, IL3-2ndRMS voltages UL1, UL2, UL3, U12, U23, U31, UE, U2

Data recorded on digital channels: output relays K1...K6binary inputs IN1, IN2

Note 1: pre-trigger time 0.25 spost-trigger time 0.25 sTotal recording time 0.5 s

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Fault recording

NA60 - flayer - 08 - 2006 7

Connection diagram example

NA60

OUTP

UT R

ELAY

S

NA60-SCH.ai

UAUXA1 ≅

A2

A9

A10

A11A12

A13

A14

E1

THYB

US

D1

ETHE

RNET

A3A4A5A6A7A8

K2

K3

K4

K5

K6

K1

RS23

2 FRONTPANEL

RS48

5

F1F2F3F4F5A+

B-

BLOC

K OU

T

A15BLOUT-

BLOUT+ A16

UE

UL1

UL2

UL3

BIN

ARY

INPU

TSA19IN1

IN2

A20A21A22

VOLT

AGE

INPU

TS

R (*)

(*) ANTIFERRORESONANCE

da

dn

n

a

N

A

L1L2L3

67, 6

7NOP

ERAT

ION

BLOC

K INA17

A18

C1IL1

IL2

IL3

IE

CURR

ENT

INPU

TS

P1S1S2

P2

P1S1S2

P2

C2C3

C4C5

C6

C7

C8

B7

B8

B5

B6

B3

B4

B1

B2

Headquarters: 20139 Milano - Piazza Mistral, 7 - Tel. +39 02 574 957 01 ra - fax +39 02 574 037 63Factory: 35127 Padova - Z.I. Sud - Via dell’Artigianato, 48 - Tel. +39 049 894 770 1 ra - fax +39 049 870 139 0

www.thytronic.it - thytronic@thytronic.it - www.pro-n.it

D I M E N S I O N S

FRONT VIEWS

FLUSH MOUNTING PANEL CUTOUT

N.4 HOLES ø 3,5

REAR VIEWS

SIDE VIEWS

FLUSH MOUNTING PROJECTING MOUNTING PROJECTING MOUNTING

PROJECTING MOUNTING

FLUSH MOUNTING(Separate operator panel)

PROJECTING MOUNTING(Separate operator panel) (Stand alone)

SEPARATE OPERATOR PANELFLUSH MOUNTING

212.5 275

ON 321 54

TRIP

START

120

ON 41 32 5

TRIP

START

107

177

205

149

F1

D1

RX

TX

F2F3F4F5

A1A2

A3A4A5

A6A7A8

A9A10A11

A12A13A14

A15A16

A17A18

A19A20

A21A22

B1B2B3B4B5B6B7B8

C1 C2

C4C3

C5 C6

C7 C8

E1

101

171

8031

F1

D1

RX

TX

F2F3F4F5

A1A2

A3A4A5

A6A7A8

A9A10A11

A12A13A14

A15A16

A17A18

A19A20

A21A22

B1B2B3B4B5B6B7B8

C1 C2

C4C3

C5 C6

C7 C8

E1

128.5110

200

168

20

3030 5 10370

161

154

170