LOW VOLTAGE RODUCTS

MCB/RCCB/MCCB/RCBO/SPD ACContactor/ThermalRelay/MPS ACB/

Table Of Contents

Miniature Circuit Breaker
ResidualCurrentCircuitBreaker
ResidualCurrentCircuitBreaker
With Overcurrent Protection
MCB Isolator
SurgeProtectorDevice
MoldedCaseCircuitBreaker
AC Contactor
ModularContactors

01/05
06/09
10/11
12
13/16
17/37
38/49
50/51

52/53 AirCircuitBreaker
54/55 Toroidal Current Transformer
56/57 Earth Leakage Relay
58/60 Thermal Relay
61/62 Automatictransferswitch
63/64 Manual Changeover Switch 65 Motor Protection Switches 66 Analog Timer

Miniature Circuit Breaker

General

■Function

ECO-4.5D,MED-6D,HIG-1D,HIG-ODLHG6DCandHIG-1DCtypesprovideprotectionofircuitsagainstshort-circuitcurents protectionagainstoverlodcurents,witingandisolationThesecircuitbreakersreusedindmesticinstalltionsaswellasin commercial and industrial electrical distribution systems.

■Selection

WhenselectingtecuitreaketeechicaldataoftectcalistalationattinstallaiopntmustbeoddTe prospectiveshort-circuitcurentatthispointmustalwaysbelowerthanthebreakingcapacityofthedeviceandtheratedvoltageof the installation must comply with the device specifications.

Structure

TripCharacteristicCurve

Tripping Curves

B Curve (3-5ln)

Designedforcableprotection.uitableforresistiveloadssuchaselectricalhatingwaterheaterandstovesandlongcablerus(fault loop impedance)

C Curve (5-10ln)

Designed for medium magnetic startups.Suitable forcommon loads such as lighting,socketoutlets,smal motors.

D Curve(10-14ln)

Designedtoalowforhighinrushloads.uitableforhighinrushloadssuchasmotors,weldingandspotmachines,halogen,odium vapour lampsand transformers.

Rated short-circuit breaking capacity(lcn)

Wiring: It is suitable for copperwire connection below 2 5mm ^ { 2 } The wiring method is to tighten the wiring with screws and the torque is 2 . 0 N * 8 m （204号

Temperature Derating

4CBaredesignedandcalibratedtocarrytheirratedcurentandtooperatewithintheir specified thermaltime/currentzoneat 3 0 ~ ^ { \circ } C esting iscarried out with the breaker mounted individuallyina verticalposition under controlled conditions.

Ifthecircuitbreakerisrequiredtooperateinenvironmentsthatdiferfromthesereferenceconditions,corectionfactorsmustbe applied to the standard data.For example,when operating at ambient temperatures higher than 3 0 ^ { \circ } \mathsf C , the breakerwill tripat progressively lower currentswithin the designated time/current zone.

The reference temperature is 30℃

Operation in DC Current

Becauseoftheirquickmake-and-breakdsignandexcelentarcquenchingcapabilityUnionminiaturecircuitbreakersareitablefor DCapplications.ForMCBsdesignedforACusebutappliedinDCinstalltions,thefollowingconsiderationsmustbeobserved:
Foroverloadprotection,othpolesoftheCBusteonectedUnderthsecondiions,thetrippingaracteristicftheBin DC is similar to that in AC.
Forshort-cicuitprotectioothpolesfteBustbeonected.Undertheseonditios,thtrippingharacteristicftheB in DC is approximately 4 0 % higher than in AC.

Structural Characteristics

■High short-circuit breaking capacity.
■Dual wiring function:the outlet end can be easily connected to standard busbars,as wellas soft and hard wires.
■Red and green safety indication for higher safety.
Withenergy-storagemechanismoperation,thecontactosesquicklyeducingadverseinfluencefrommanualhandleoprationand significantly improving service life.
■Terminals equipped with dovetails to prevent misconnection,improving wiring efficiency and reliability.
■Compatible with a variety of modular accessories.
■Housing andotherplastic partsare made of high flame-retardant,high-temperatureand impact-resistantmaterials.

Overall And Mounting Dimensions (mm)

Technical parameters

Rated current(In):80A、100A、125A.
Rated operation voltage Ue:230V/400V\~(1P)，400V\~(2P、3P、4P);
Rated insulation voltage Ui: 500V;
Frequency: 50/60Hz;
Thermal magnetic release: C、D;
Number of poles:1P、2P、3P、4P Mechanical life: 20000 cycles;
Electrical life: 6000 cycles;
Rated short-circuit breaking capacity(lcn): 6kA、10kA;
Short-circuit breaking capacity (lcs): 6kA、10kA;
Rated impulse withstand voltage (Uimp): 4kV.
Compliantstandards
IEC60898-1
IEC60947-2

Overall and mounting dimensions (mm)

Residual Current CircuitBreaker

Function

UnionResidualCurrentCircuit Breakers(RCCBs)-RCA-2/AC,RCA-4/AC,RCA-2/A,RCA-4/A,RCB-2/AC,CB-4/AC,RCB-2/+sCB4 / \mathsf { A } + \mathsf { S } , RCK-2,RCK-4 protect peopleagainstindirectcontactand provideadditionalprotectionagainstdirectcontact. Furthermore,theyprotectinstalationsagainstfirehazardscausedbyinsulationfaults.UnionRCCBsarewidelyusedinresidential installations as wellas in commercial and industrial electrical distribution systems.

Overall And Mounting Dimensions (mm)

Functional PrincipleofRCCB

Every Residual Current Circuit Breaker (RCCB) has three basic components;

Toroidal currenttransformer,Triprelay,Switchingmechanism.

Thefunctionofthsecomponentsistodetectandevalatethesidualcurrntandtointeruptthepowersupplyfteresidualcunt exceedsaspecifedvaueForectpeatioanCBallvonductorsofteprotecteduitatleastasayoductos necessary for proper appliance function-must pass through the summation current transformer.

AnRCCBworksontheprincipleofcomparingcurrentsinliveconductorspassingthroughthissummationtroidalcurrenttansfoer Undernormalconditions(nophase-to-groundfault),thevectorsumof instantaneouscurrentvaluesqualszero.Themagneticfluxes from the various conductors cancel each other out inside the transformer core.

Whenanearthfaultocurs,partof thecurrentflowsoutsidetheliveconductors,creatinganimbalance.Thisimbalanceinducesa magneticfluinsidettrasforroredtupundingenerateurettatctiatestripelayeelate the switching mechanism,causing the contacts of the RCCB to open and disconnect the circuit.

SM switching mechanism
PMR permanent magnet relay
ST summationcurrenttransformer
T testbutton
R resistor
I _ { \Delta } residual current
R _ { _ A } applianceearthing resistance
R _ { _ B } powersupplyearthing resistance

TTnetwork isused for descriptionre,uthe sameappliesanalogouslyfor other net work types.

SummationCurrentTransformerandSwitchingMechanism

Thesummationcurent transformerisusuallydesignedasaring-shaped transforerPermallyiscommonlyusedasthemagnetic materialhiletployacedgnticaterialsithnostaltructuresefadpdnt RCCB is a trip relay with a permanent magnet (PMR).

Inidlestate,tltueldyttOceeisducdntiiole ofthemagnetisducedlowingtesingfcetooetelayrmatureDuetitssimplicityndroveneliabilitytitef polarized relay is widely used.

Theswitching mechanismoftheRCCBmustbebothsensitiveandstrongenoughtoensurereliableoperationof thecontacts.Eachloac currentpathmustbecapableofcarryingtheratedcurrentthroughouttheservicelifeofthedevice.Thedistacebetweenopencontact must provide safeinsulation,and contacts must be protected from surgecurrentsand presumed short-circuit currents.

For multi-poletypes,theneutralconductor(N)contactsmustclosebeforeandopenafterthephaseconductor(L)contacts.This preventsnwantedsurgevoltagesinthephases.AllRCBsmustbeequippedwithatestingdeviceconsistingoftestbutton(Tanda resistor(R)apropriatetoteperatingoltage.ThetestbuttonmustbeasilyacessbletotheuserWhenpressed,itsiulates residual current using the test resistor, forcing current to flow outside the summation transformer.

Sensitivityto VariousTypesofResidual Currents

According to their sensitivity, RCCBsare classified into Type AC,Type A,and Type B.
Over time,additional variants have been developed to meet practical requirements.
·TypeAC:IntendedonlyforalternatingresidualcurrntsPulsatingDCcomponentsofresidualcurrentmayimpairsensityorblock tripping (IEC/EN 61008).
·TypeA:DetectsalternatingandpulsatingDCresidualcurents,possblyincudingsmooth DCresidual currentsupto6mA(IEC/EN 61008).
·TypeB:Detectsalltypesofresidualcurrents(alteratingpulsatingDCandsmoothDCresidualcurrents)(EC/E62423).TypeB devicesareessentialininstallationswithfrequency inverters,potovoltaicsystems,andequipmentwithpowersmicoductors. ThefundamentaldiferencebetweenTypeAC,AandBliesinthetypeofmaterialusedforthecoreofthesummationcurrent transformer.

Hysteresis Curves Of Materials OfTypeAcAndASummation CurrentTransformers

B-magnetic induction [T] H-magnetomotoricforce [ \mathsf { A } \mathsf { m } ^ { * 1 } ] A-workingpointforalternatecurrent

TypeAC Higher remanence (Br)

TypeAC Lower remanence (Br)

Limits Of Tripping Times Of Rccb In Tests By Alternating Residual Current

Fig.20Limits of tripping times

ResistancetoTransientSurgeCurrents

Topreventnuisancetripping(unwantedtrippingcausedbyimpulsevoltages)duetolightningsurgesswitchingofhigcapacitance circuits,orswitching surges,RCCBsaredesigned witha high levelof immunity to transientcurrents.

Shape of surge current wave 8 / 2 0 ~ \mu s for tests of RCCB resis tance to unwanted tripping

Shape of standardized damped surge current wave of 100kHz, 100/0,5us

Residual Current CircuitBreakerWith Overcurrent Protection

General

TheRCOSeries Residual CurrentOperated Circuit Breakers with Overcurrent Protection (RCBOs)aresuitableforAC systemswitha frequencyof 5 0 / 6 0 ~ { \mathsf { H z } } , rated voltage240V/415V,andratedcurentupto63A.Theyprovideprotectionagainstoverloads,shortcircuits, and residual currents.

TheRCBOquicklydisconnectsthepowersupplyifapersonisatriskofelectricsockoriftecircuitleakagecurrntexcedstheprese value,ensuring the safety of both people and equipment.

RCOSeriesRBOsanpliedisidentialmmecialustrialndgisedngisaltiseyrelsablefo infrequent switching of lines under normal operating conditions.

The series includes devices classified according to detectable residual current waveforms:

TypeB:ProtectionagainstsinusodalACresidualcurents,pulsedDCresiualcurentslternatingesidualsiusodalcurentsupto 1 0 0 0 \mathsf { H z } , pulsating DC residual currents,and smooth DC residual currents, whether applied suddenly or gradually. ■Type B + ：ExtendedsensitivityersionofTypeBoferingprotectionuptoigherfrequencyanges(kHzlevel),suitableforistalion with power electronics,photovoltaic systems,and frequency converters.

Technical parameters

The tripping characteristic curves are as shown below.

Product Advantage

■Ambientair temperature:Average ambient temperature not exceeding 3 5 ^ { \circ } C within 24 hours.
■Altitude: Installation site altitude not exceeding 2 0 0 0 { ~ m ~ }
■Atmospheric conditions: Relative humidity not exceeding 5 0 % at a maximum temperature of + 4 0 \ ^ { \circ } \mathsf C ; at + 2 0 ^ { \circ } C , relative humidity may reach up to 9 0 %
■Installation method: Standard DIN rail installation (TH35-7.5).
■Pollution class: ClassIll.
■Connection mode: Screw connection.

Product advantage

·Multilayer spark gap device Integrated surge protector unit ·Highest to withstand 50kA(10/350us)lightning shock ·Action response time is less than 100ns

L1、L2、L3.N.PE( ( 4 + 0 circuit)

L1、L2、L3、N、PE 3 { + } 1 circuit)

TechnicalParameters

Outlinedimension

For installation at LPZ O _ { A } -1orhigher,protecting d.cpowersupplysystemfromsurge damages.Applied inpluggable SPDClass l+(Class \mathsf { B } { + } \mathsf { C } for various d.c.power supply system. Designed according to IEC 61643-1.

Product advantage

·Pluggable module,easy for installation and maintenance ·High discharge capacity, quick response ·Double thermal disconnection devices,provide more reliable protection ·Multifunctional terminals forconnection of conductorsand busbars ·Green window will change when fault occurs,also provide remote alarm terminal

TechnicalParameters

Outlinedimension

Molded Case Circuit Breaker

General

This switch is designed for opening and closing circuits in standard switching applications.It hasa breaking capacity range of 1 8 k A to 5 0 \ k A , availablein both fixed and adjustable versions,with rated current options ranging from 16A to 2 5 0 mathsf { A } .

Product Advantage

Dualrotarycontactstructure:The UNSeries employsadualrotarycontactdesignwithanenergyrelease systemtoprovide stable reliable protection and excellent current-limiting performance. Protectivetransparentcover:Thetransparentaluminumcoversafeguardsthetripunitandallows theinstalationofrotaryhandles motor operation mechanisms,and other accessories. Altitude suitability:Designed for installation at siteswith altitudes up to 2 , 0 0 0 { ~ m ~ } Operating temperature range: - 2 5 ^ { \circ } C to + 7 0 \ ^ { \circ } \mathsf C . For ambient temperatures above + 4 0 ^ { \circ } C (or + 6 5 ^ { \circ } C for circuit breakers protecting motor feders),derating is required.
■Environmental durability: Resistant to humid air,salt spray,oil mist,and mold.
Safeinstalltio:Mustbstaledinnvironmetsfeofxplosnzadsonductivedustorsubstanesthatouldoetal or damage insulation.
■Outdoor conditions: Suitable for use in locations without direct exposure to rain or snow.
■Pollution degree: Class 3.
■Installation category: CategoryIl. ? ? ? ? ? ?
YOUNION IEC/E60947-2 YOUNION IEC/EN60947-2 VYOUNION Ln 30 ELCB
口 口 享享磊 B L0t40℃ 250A >RED 250A TRI 250A TRIF TRIP Unlo Unlc ? ? ? ? ? ? Fixed Type Adjustable Type Adjustable-Leakage Type

Product Characteristics

Security

The module housing ismade of highstrength heat-resistantmaterial.Achieve electrical isolation between phases and operating mechanisms.To ensure the safety of users and eliminate phase-tophase current short circuit.

High Performance

Reliability
The closed structure design further protects the rotating and moving
conductors from the external
environmentsand makes the electrical contacts more reliable.

Gas-producingmaterial isadopted in the module to produce gas flow when the gas-producing short-circuit current is generated. Obviously improve the effect of air blowing,to achieve a better current limiting effect, the product break index increased significantly.

UNF Fixed Type

UNA Adjustable Type

Built-out Accessory

Built-Out Accessory

Inter-phase Insulation Barrier

Inter-phase insulation barrier is safety accessory,which is used forthe insulation between the phases.It can guarantee the best insulation of the wiring terminal.
■Theyare compatible with the short terminal covers.And it is OK to mount the inter-phase insulation barrier in both UN seriesand every phase(2P,3P and 4P).

Short Terminal Cover

■Short terminal cover is insulation accessory,which is used to prevent the direct contact between the terminalincircuit breakerand other live parts to ensure thesafety of the users.
■Allthe terminal coveris designed with holes which can be knocked off to connect the cables of various wires and the copper platens.
■Theyare compatible with both the interphase insulation barrierand suitable for same phase&ampere frame of both MCCB/ELCB series.

Copper Connection Bar(CCB)

Copper connection bar is connection accessories,which is used to connect wire/cable ol any other conductor together with MCCB/ELCB series. ITheyare suitable forsame phase and same ampere frame of both MCCB/ELCB series

Built-in Accessory

Shunt trip (SHT)

■The shunt trip isan accessory for remote control. ■The shunt will trip when the input voltage is 7 0 % - 1 1 0 % of the rated operational voltage.(US)

Auxiliary switch (AX)(1NO+1NC)

■Auxiliary switch is used to indicate the “On"and“Off"status of the breaker ■Each switch has two contactswith a common connection. ■One is open and the other closed when the circuit breaker is open,and vice versa.

Alarm switch(AL)

■Alarm switch willmake immediate audio or visual indication in a tripped breaker due to overload, short circuit or shunt trip to remind people. ■This switch features a closed contact when the circuit breaker is tripped automatically. ■In other words,this switch does not function when the breaker is operated manually

Combination switch ( A X + A L )

It has one auxiliary switch(AX)and one alarm switch(AL)in abody to connectinto the same position of the breaker.

Combination switch ( A X + A X ) (2NO+2NC)

lIt has two auxiliary switch(AX) in a body to connect into the same position of the breake

Built-in Accessory(UNA/UNF)

Thermal Magnetic Accessories

UNF Fixed Type UNA Adjustable Type

Outline Dimensions

Outline Dimensions

ThermalMagneticAccessories

Method of mounting

Thisseriesofcircuitbreakers isgenerallyinstalledverticallybutcanalsobe installedhorizontally(refer tothepicturebelow

Verticalinstallation

Horizontal installation

Hold Characteristics

Ticuitadctac haracteristicsaredetailedinthetablebelow

For power distribution

Outline Dimensions

The UNAE series electronic molded case circuit breakers come in threeshell types that can be matched with the basic type forAC distributionprotection,with a rated working current ranging from 40A to 630A.

■Itfeatures high tripping accuracy,reliable operationand is not affected by the external environmental temperature;
■Operating environment temperature: 4 0 ^ { \circ } C to + 7 0 ^ { \circ } \mathsf C . （204号

General

Electronicmoldedcasecircuitbreaker UNAE-250H UNAE-400H UNAE-630H
Shel frame rating current Inm(A) 250 400 630
Frequency (Hz) 50/60
Rated current In(A) 40630125A 400 630
Rated working voltage \mathsf { U e } ( \mathsf { V } ) AC230V/AC400V/AC690V
Rated insulation voltage Ui(V) 1000
Rated impulse withstand voltage Uimp(kV) 12
Rated short-circuit breaking capacity code L M H L M H L M H
Ratedultimateshort AC400V 36 50 75 36 50 75 36 50 75
-circuitbreakingcapacity
Icu(kA) AC690V 4 8 8 6 8 8 6 8 8
Rated operating short AC400V 36 50 75 36 50 75 36 50 75
-circuitbreakingcapacity
Ics(kA) AC690V 4 8 8 6 8 8 6 8 8
Usage category A B
Isolation function √
Arc distance (mm) 0 Actual average value 20000 20000 20000
Mechanical life (times) Standard specified value 7000 4000 4000 Actual average value (AC415V) 10000 8000 8000
Electrical life (times) Standardspecifidvalue (AC415V) 1000 1000 1000
Trip device type Electronic type
Usage and methods Distribution protection type,motorprotection type,generator protection type
Overload protection （2号 \surd （20
Short-circuit protection √ 1P ：
Dimensions 2P -
W\*L\*H(mm) 3P 107\*165\*101 140\*257\*110 140\*257\*110 4P 142\*165\*101 184\*257\*110 184\*257\*110

■Rated operational voltage (Ue): AC 40o V/690 V ■Rated insulation voltage (Ui): 1000 V ■Rated impulse withstand voltage (Uimp): 8000 V

Circuit Breaker Voltage Ratings

Environmental requirementsforcircuitbreaker installationsites

InsulationTest

Each circuit breakeris factory-tested for insulation in compliance with applicable standards. However, if re-testing is required before installation,the following procedure must be observed

■Test instrument: Use a 10o0 VDC megohmmeter.
■Testconditions: Withthe circuit breakerin the open position,perform insulationresistance measurements as follows: 1.Between inlet and outlet connection terminals:1-2,3-4,and 5-6 2.Between terminals1,3,and5(connected bywires)and thecircuitbreaker casing (casing covered with metal foil) 3.Between the undervoltage release of the main circuit and the circuit breaker casing
■Insulation resistance requirement: Not less than 20 MΩ.
Alternative testmethod:Ifa10ooVDCmegohmmeterisnotavailable,apowerfrequencywithstandvoltage testermaybeused. Apply 30oo VAC for1 minute across the same test points specified above.

Outline Dimensions

Usage Environment

The circuit breaker must not be installed in the following environments:

■Locations containing explosive gases (risk of explosion).
■Extremely humid areas.
Sites where theexternalmagneticfield exceeds5times the Earth’smagneticfield,as this maycause malfunction.
■Locations subject to vibrations greater than { \mathsf { 5 9 } } ■Areas containing corosive gases or vapors that could damage metal parts or insulation.

AC Contactor

■More auxiliary contacts,meet variousapplication requirements.
■Suitable for larger voltage fluctuation to ensure the stable operation of the equipment.
■Super environment adaptability,can be reliable operation with extreme environment.

Product Overview

TheUNACandU1serisCntactorsUNAC-09,UAC-12UNAC-18UNAC-25UNAC-32UNAC-40,UC-50UN-6 80,UNAC-95,UNC1-115UNC1-150,UNC1-180UNC1-225featureamoderndesignandcompactstructure.Theyaresuitablefor starting and controlling AC motors,frequent switching,and remote circuit control.
When combined with a thermal relay,these contactors can be used to assemble amagnetic motor starter.
Standards: IEC 60947-1, IEC 60947-4-1

Specifications

■Rated operational current (le): 9-225 A ■Rated operational voltage (Ue): 220-690 V ■Rated insulation voltage: 690 V ■Poles:3P，4P ■Installation: DIN rail and screw mounting

Specifications

Overall And Mounting

■UNAC-09\~40 3P

Specifications

Overall And Mounting

■UNAC-F115\~F330

■UNAC-F400\~F500

■UNAC-F630\~F800

Product Overview

TheUNAC-MseriesACContactorfeaturesamoderndesignandcompactstructure,makingitsitableforfrequentstartingandstopping of AC motors,aswellasremoteswitchingofcircuitsoverlongdistances.Whencombinedwithathermaloverloadrelayitformsa complete magnetic motor starter system.
Standards: IEC 60947-1,IEC 60947-4-1

Model and Meaning

UNAC-M □□-/ Z = D C operation, { \sf N } = Reversible AC contactor Contact types and quantities are indicated by numbers (reversible contactors refer to the contact configuration of a single unit): \ 1 0 Three normally open (NO) main contacts ^ + one NO auxiliary contact （204号 0 1 Three NO main contacts ^ + one normally closed (NC) auxiliary contact ^ { 0 8 } Two NO main contacts ^ + two NC main contacts （204号 ^ { 4 0 } Four NO main contacts Rated current: Expressed as the rated operational current under AC-3 utilization categoryat 400V (380/ (6A,9A,12A,16A) Design serial number

Specifications

■Rated operational current (le): 6-16 A
■Rated operational voltage (Ue):220-690 V
■Rated insulation voltage (Ui): 690 V
■Poles:3P/4P
■Mounting:DiN rail and screw installation
■Application: Motor starting,stopping,and remote control of AC circuits

Specifications

Operating and Installation Conditions

Overall and Mounting

Installationand overall dimensions of UNAC-Mo6\~M16 seriesAC contactor