1228

The temperature-rise test is necessary to test the terminal block as a whole, including the insulation housing at rated current,at overload and under short circuit conditions.Unless otherwise specified in the related equipment specification, e.g. by specifying the nominal currents of the equipment,terminal blocks and connectors are tested with the current loads as specified in the respective construction specification.For rail-mounted terminal blocks acc. to IEC 60947-7-1/EN 60947-7-1/VDE 0611 part 1 and terminal blocks acc. to IEC60998-1/EN 60998-1/ VDE 0613 part 1 the temperature rise shall not exceed 45 Kelvin.Connectors must withstand the upper and lower values of the temperature range as specified in the detailed specificationor manufacturer’s specification. The sum of the ambient temperature and temperature rise of a connector shall not exceed the upper temperature limit.The test is performed with the rated current selected from the current-carrying capacity curve acc. to IEC 60512, test 5bdepending on the ambient temperature.

Test arrangement of the temperature-rise testacc. to IEC/EN 60947-7-1

≤10

mm

Temperaturemeasurement

Wire Test current acc.size IEC/EN

60947-7-1Table 5

AWG/MCM A

24 422 6

20 818 10

–16 16

14 2212 29

10 388 50

6 674 90

2 1211 139

0 16200 185

000 2170000 242

250 kcmil 271300 kcmil 309

350 kcmil 353500 kcmil 415

600 kcmil 520

Rated cross Test current acc.section IEC/EN

60947-7-1 60998-1Table 4 Table 2

mm2 A A

0.2 4 40.34 5 5

0.5 6 60.75 9 9

1.0 13.5 13.51.5 17.5 17.5

2.5 24 244.0 32 32

6.0 41 4110 57 57

16 76 7625 101 101

35 125 125–

50 15070 192

95 232–

120 269150 309

185 353240 415

300 520

Tests and Testing Procedures According to IEC/EN Standards (continued)

• Temperature-rise test according to IEC/EN 60947-7-1, IEC/EN 60998-1, IEC/EN 61984

Electrical TestsAll WAGO products meet the requirements of the following electrical tests.

≤10

mm

Measuring pointVoltage drop

Measuring pointVoltage drop It

Test arrangement of the temperature-rise test acc. to IEC/EN 61984

1229

12

50

45

40

35

30

25

20

15

10

5

00 10 4020 30 50 60 8070 90 100

Both the constructional requirements and the current-carrying capacity of a connector must be checked by the user whenselecting connectors.The current-carrying capacity depends on the cross section of the connected wire, the ambient temperature, the number ofsimultaneously loaded poles, the internal resistance of the connector, the PCB layout if required and the connector materialsused. In accordance with the IEC/EN 60512-5-2 standard, the relation between the current, the ambient temperature andthe temperature rise up to the upper temperature limit of the connector is represented by a current-carrying capacity curve(derating curve). The connector shall only be operated up to this temperature limit (sum of the self-generated heat and theambient temperature) without being damaged or destroyed during operation.The way a current-carrying capacity curve (acc. to IEC/EN 60512-5-2) works is shown in the following application using theX-COM®-SYSTEM: the basic curve of a 4-pole connection charged with 32 A per pole shows a maximum ambient tempe-rature of 37°C using a conductor of cross section 4 mm2 (AWG 12). The current must be reduced at higher ambient tempe-ratures (e.g., to 17 A at 80°C).Current curves are available on request or at www.wago.com

• Current-carrying capacity curve (derating curve) according to IEC/EN 60512-5-2

Headers with straight solder pins 769-632 to 769-645

1-conductor female plugs: 769-102 to 769-115Cross section of conductor: 4 mm2 (AWG 12)Length of the conductor: 1 m

Test current (A)

Ambient operatingtemperature (°C)

Rated current of the conductor

2 poles

4 poles

5 poles

6 poles

10 poles

12 poles

15 poles

1230

_____>

______>

Tests and Testing Procedures According to IEC/EN Standards (continued)Electrical Tests (continued)

The voltage drop test allows judgement of the quality of a clamping unit under vibration, temperature cycling, industrial cli-mate and salt spray conditions in order to verify that the contact area is gastight.

• Voltage drop test according to IEC/EN 60947-7-1

Test arrangement for the voltage drop test

(The voltage drop has been determined using therated current)

The CAGE CLAMP® and CAGE CLAMP®S connections encloseand contain flexible conductors. There-fore, a variation of the voltage dropwith solid and fine-stranded conductorsis so small that its influence may beneglected for the practical applicationof the terminal blocks.

Example: Current load cycling test result for Combi PCB terminal blocks with IDC and push-wire

1 IPrüf10

The change of voltage drop over longer periods under current load cycling conditions is shown for the Combi PCB terminalblocks 251-3xx using solid copper wires. The diagram shows that the voltage drop is constant, far beyond the 192 cyclesrequired in IEC/EN 60998-2-2.

Vol

tage

dro

p pe

rcl

ampi

ng u

nit i

n m

V

Cycles (1 cycle: 0.5 h 6 A / 0.5 h 0 A)Cl. unit 1

IDC connections using 0.5 mm2 (AWG 20) solid copper wire

Cl. unit 2 Cl. unit 3 Cl. unit 4

24

22

20

18

16

14

12

10

8

6

4

2

0

0 48 96 144

192

240

288

336

384

432

480

528

576

624

672

720

768

816

864

912

960

1000

Vol

tage

dro

p pe

rcl

ampi

ng u

nit i

n m

V

Cycles (1 cycle: 0.5 h 6 A / 0.5 h 0 A)Cl. unit 1

Push-wire connections using 0.5 mm2 solid copper wire

Cl. unit 2 Cl. unit 3 Cl. unit 4

24

22

20

18

16

14

12

10

8

6

4

2

0

0 48 96 144

192

240

288

336

384

432

480

528

576

624

672

720

768

816

864

912

960

1000

1231

12

ICCICS

Apart from the rated current, which can be constantly applied to an electrical device, operation-related short peak currentsconsistently occur in electrical installations when motors are started, for example. Also, in the event of a short circuit, a highcurrent can flow for a short time until the fuse element melts. Terminal blocks and connecting devices must be able to with-stand such conditions. For example, a rail-mounted through terminal block shall be capable of withstanding for 1 s therated short-time withstand current which corresponds to 120 A/mm2 of its rated cross-section, in accordance to IEC/EN60947-7-1.

• Short-time withstand current test (short-circuit withstand capacity) according to IEC/EN 60947-7-1

The short circuit current of a 2.5 mm2 / AWG 12 connector(Series 231, 721) is 300 A.

During the short-time withstand currenttest, the ground (earth) conductor rail-mounted terminal blocks are subjectedthree times for 1 s each to a currentload of 120 A/mm2. The voltage drop is the main factor forpassing the test (limiting value and con-stant measured values).

Measuringpoint

Measuringpoint

Measuringpoint

VCC

VCS

Test specimen

The short circuit current of the 95 mm2 / AWG 000high current terminal block (item No. 285-195) is11400 A.

1237

12

According to their application,the WAGO terminal blocks and connectors are suitable for pollution degrees2 or 3 and for over-voltage categories II or III.

Example:

WAGO PCB terminal strips(pin spacing 5/5.08 mm)

250 V/4 kV/3 500 V/4 kV/2Rated voltage 250 V 500 VRated impulse voltage 4 kV 4 kVPollution degree 3 2Overvoltage category III III

Rated insulation Creepage distances, clearancesvoltage

V mm

≤ 130 1.5> 130 and ≤ 250 3.0> 250 and ≤ 450 4.0> 450 and ≤ 750 6.0

> 750 8.0

Table 3: Clearances and creepage distances(IEC 60998-1)

Clearances and creepage distances are used to certify many terminal blocks in accordance to IEC 60998-1 / EN 60998-1 / VDE 0613, part 1, table 3.

1236

Table 4: Creepage distances to avoid failure due to tracking

Minimum creepage distances

Voltage 1) Printed wiringr.m.s. material Pollution degree

Pollution degree1 2 1 2 3

All material All mat. gr. All material Material group Material groupgroups except IIIb groups I II III I II III2)

V mm mm mm mm mm mm mm mm mm

10 0.025 0.04 0.08 0.4 0.4 0.4 1 1 112.5 0.025 0.04 0.09 0.42 0.42 0.42 1.05 1.05 1.0516 0.025 0.04 0.1 0.45 0.45 0.45 1.1 1.1 1.120 0.025 0.04 0.11 0.48 0.48 0.48 1.2 1.2 1.225 0.025 0.04 0.125 0.5 0.5 0.5 1.25 1.25 1.2532 0.025 0.04 0.14 0.53 0.53 0.53 1.3 1.3 1.340 0.025 0.04 0.16 0.56 0.8 1.1 1.4 1.6 1.850 0.025 0.04 0.18 0.6 0.85 1.2 1.5 1.7 1.963 0.04 0.063 0.2 0.63 0.9 1.25 1.6 1.8 280 0.063 0.1 0.22 0.67 0.95 1.3 1.7 1.9 2.1

100 0.1 0.16 0.25 0.71 1 1.4 1.8 2 2.2125 0.16 0.25 0.28 0.75 1.05 1.5 1.9 2.1 2.4160 0.25 0.4 0.32 0.8 1.1 1.6 2 2.2 2.5200 0.4 0.63 0.42 1 1.4 2 2.5 2.8 3.2250 0.56 1 0.56 1.25 1.8 2.5 3.2 3.6 4320 0.75 1.6 0.75 1.6 2.2 3.2 4 4.5 5400 1 2 1 2 2.8 4 5 5.6 6.3500 1.3 2.5 1.3 2.5 3.6 5 6.3 7.1 8.0630 1.8 3.2 1.8 3.2 4.5 6.3 8 9 10800 2.4 4 2.4 4 5.6 8 10 11 12.5

1000 3.2 5 3.2 5 7.1 10 12.5 14 161250 4.2 6.3 9 12.5 16 18 201600 5.6 8 11 16 20 22 252000 7.5 10 14 20 25 28 322500 10 12.5 18 25 32 36 403200 12.5 16 22 32 40 45 504000 16 20 28 40 50 56 635000 20 25 36 50 63 71 806300 25 32 45 63 80 90 1008000 32 40 56 80 100 110 125

10000 40 50 71 100 125 140 16012500 503) 633) 903) 1253)

16000 633) 803) 1103) 1603)

20000 803) 1003) 1403) 2003)

25000 1003) 1253) 1803) 2503)

32000 1253) 1603) 2203) 3203)

40000 1603) 2003) 2803) 4003)

50000 2003) 2503) 3603) 5003)

63000 2503) 3203) 4503) 6003)

1) This voltage is:– for functional insulation: the working voltage;– for basic and supplementary insulation of the circuit energized directly from the mains (see 2.2.1.1.1):

the voltage rationalized through table 3a or table 3b, based on the rated voltage of the equipment, or the rated insulation voltage;

– for basic and supplementary insulation of systems, equipment and internal circuits not energized directly from the mains (see2.2.1.1.2): the highest r. m. s. voltage which can occur in the system, equipment or internal circuit when supplied at rated voltageand under the most onerous combination of conditions of operation within equipment rating.

2) Material group IIIb is not recommended for applications in pollution degree 3 above 630 V.3) Provisional data based on extrapolation. Technical committees who have other information based on experience may use their

dimensions.

Tests and Testing Procedures According to IEC/EN Standards (continued)Electrical Tests (continued)

• Insulation parameters according to IEC/EN 60664-1 (continued)

1235

12

Material groupsMaterials are separated into fourgroups according to their CTI (Compa-rative Tracking Index) as follows:Material group I: 600 ≤ CTIMaterial group II: 400 ≤ CTI < 600Material group III a: 175 ≤ CTI < 400Material group III b: 100 ≤ CTI < 175

The CTI values above refer to valuesobtained, in accordance with DIN EN 60112/VDE 0303, part 11, on samples specially made for the purpose and tested with solution A.

Table 3 b: Three-phase 3- or 4-wireAC systems

Voltages rationalized for table 4

For insulation line-to-line For insulation line-to-line

Three-phase four-wire systems Three-phase three-wire systemsAll systems neutral earthed2) unearthed1) or corner-earthed

V V V V60 63 32 63

110120 125 80 125127150**) 160 160208 200 125 200220230 250 160 250240300**) 320 320380400 400 250 400415440 500 250 500480500 500 320 500

575 630 400 630600**) 630 630660690 630 400 630

720830 800 500 800

960 1000 630 10001000**) 1000 1000

Nominalvoltageof thesupplysystem

(mains)*)

1) Line-to-earth insulation level for unearthed or impedance-earthed systems equals that for line-to-line becausethe operating voltage to earth of any line can, in practice, approach full line-to-line voltage. This is because theactual voltage to earth is determined by the insulation resistance and capacitive reactance of each line toearth; thus, low (but acceptable) insulation resistance of one line can in effect earth it and raise the other two tofull line-to-line voltage to earth.

2) For equipment for use on both three-phase four-wire and three-phase three-wire supplies,earthed and unearthed, use the values for three-wire systems only.

*) For relationship to rated voltage see 2.2.1.**) These values correspond to the values in table 1.

1234

Tests and Testing Procedures According to IEC/EN Standards (continued)Electrical Tests (continued)

• Insulation parameters according to IEC/EN 60664-1 (continued)

1) Line-to-earth insulation level for unearthed or impedance-earthed systems equals that for line-to-line becausethe operating voltage to earth of any line can, in practice, approach full line-to-line voltage. This is becausethe actual voltage to earth is determined by the insulation resistance and capacitive reactance of each line toearth; thus, low (but acceptable) insulation resistance of one line can in effect earth it and raise the other twoto full line-to-line voltage to earth.

*) For relationship to rated voltage see 2.2.1.**) These values correspond to the values in table 1.

Creepage distances, Rated voltages, Material groupsCriteria for the dimensioning of thecreepage distances are the rated vol-tages, the degrees of pollution and thematerial groups.The pollution degrees specified for theclearances and its quoted allocation tolocations is also applicable forcreepage distances.The tables 3 a and 3 b of the DIN EN 60664-1/VDE 0110, part 1contain the rated voltages which haveto be considered for dimensioning theminimum creepage distance.

Table 3 a: Single-phase 3- or 2-wireAC or DC systems

Table A.2:Height correction factors(DIN EN 60664-1/VDE 0110, part 1)

Height Standard Multiplierair pressure for

m kPa distance2000 80 13000 70 1.144000 62 1.295000 54 1.486000 47 1.77000 41 1.958000 35.5 2.259000 30.5 2.62

10000 26.5 3.0215000 12 6.6720000 5.5 14.5

Voltages rationalized for table 4

Nominal voltage For insulation For insulationof the supply line-to-line1) line-to-earth1)

system (mains)*)

All systems Three-wire systemsmid-pointearthed

V V V12.5 12.52425 25

30 324248 50

50**)

60 6330–60 63 32100**) 100110120 125

150**) 160220 250

110–220120–240 250 125

300**) 320220–440 500 250600**) 630

480–960 1000 5001000**) 1000

1233

12

Pollution degree Pollution factors are all solid, liquid or gaseous foreign matter which may reducethe dielectric strength or the specific surface resistances.Soiling is divided into 4 classes in accordance with the environmental conditions tobe expected:

Dimensioning of clearances acc. to DIN EN 60664-1/VDE 0110, part 1, table 2Choose the minimum clearances inaccordance with the rated impulsevoltages and the degree of pollution.For the operating life of the equipmentdo not go below these minimum clea-rances.Table 2 contains a list of information forthe Case A, the inhomogeneous field,and for the Case B, the homogeneousfield.This covers an electric field with essentially constant (Case B) or notconstant (Case A) voltage gradientsbetween the electrodes.Equipment with a clearance inaccordance with Case A, in otherwords rated for the most unfavour-able case, can be employedwithout evidence of impulse vol-tage testing.Equipment for which the clearances aredimensioned acc. to Case B or betweenA and B requires verification by theimpulse voltage test.The clearances shown in table 2 areapplicable for an installation height ofup to 2000 m above sea level.Values for clearances above 2000 mmust be multiplied by a high correctionfactor in accordance with table 2.

Examples of pollutiondegrees for assigned areas:

pollution degree 1: No pollution or only dry, Electrical equipment innon conductive pollution air-conditioned or cleanoccurs. The pollution has dry rooms.no influence.

pollution degree 2: Only non-conductive Electrical equipment inpollution occurs except living areas, shops,that occasionnally laboratories, testtemporary conductivity stations, mechanicalcaused by condensation workshops and medicalis to be expected. rooms.

pollution degree 3: Conductive pollution Electrical equipment inoccurs or dry non- industrial and farmingconductive pollution occurs areas, unheated rooms,which becomes conductive workshops and boilerdue to condensation which rooms.is to be expected.

pollution degree 4: The pollution generates Electrical equipment for persitent conductivity outdoor use.caused by conductive dustor by rain or wet conditions.

Table 2: Clearances to withstand transient overvoltages(DIN EN 60664-1/VDE 0110, part 1)

1) This voltage is– for functional insulation: the maximum impulse

voltage expected to occur across the clearance(see 3.1.4.);

– for basic insulation directly exposed to or signi-ficantly influenced by transient overvoltages fromthe low-voltage mains (see 2.2.2.2, 2.2.2.3.1 and 3.1.5): the rated impulse voltage of the equipment;

– for other basic insulation (see 2.2.2.3.2.): the highestimpulse voltage that can occur in the circuit;

– for reinforced insulation, see 3.1.5.2) Preferred values specified in 2.1.1.2.3) For printed wiring material, the values for pollution

degree 1 apply except that the value shall not be lessthan 0.04 mm, as specified in table 4.

4) The minimum clearances given for pollution degrees 2and 3 are based on the reduced withstand characteri-stics of the associated creepage distance under humidi-ty conditions (see IEC 60664-5).

5) For parts or circuits within equipment subject to impulsevoltages according to 2.2.2.3.2, interpolation of valuesis allowed. However, standardization is achieved byusing the preferred series of impulse voltage values in2.1.1.2.

6) The dimensions for pollution degree 4 are as specifiedfor pollution degree 3, except that the minimum clea-rance 1.6 mm.

Minimum clearances in air up to 2000 m above sea levelCase A Case B

(inhomogeneous field, see 1.3.15) (homogeneous field, see 1.3.14)Pollution degree6) Pollution degree6)

1 2 3 1 2 3mm mm mm mm mm mm

0.332) 0.01 0.010.40 0.02 0.020.502) 0.04 0.040.60 0.06 0.23)4) 0.06 0.23)4)

0.802) 0.10 0.84) 0.101.0 0.15 0.15 0.84)

1.2 0.25 0.25 0.201.52) 0.5 0.5 0.30 0.302.0 1.0 1.0 1.0 0.45 0.452.52) 1.5 1.5 1.5 0.60 0.603.0 2.0 2.0 2.0 0.80 0.804.02) 3.0 3.0 3.0 1.2 1.2 1.25.0 4.0 4.0 4.0 1.5 1.5 1.56.02) 5.5 5.5 5.5 2.0 2.0 2.08.02) 8.0 8.0 8.0 3.0 3.0 3.0

10 11 11 11 3.5 3.5 3.512.2) 14 14 14 4.5 4.5 4.515 18 18 18 5.5 5.5 5.520 25 25 25 8 8 825 33 33 33 10 10 1030 40 40 40 12.5 12.5 12.540 60 60 60 17 17 1750 75 75 75 22 22 2260 90 90 90 27 27 2780 130 130 130 35 35 35

100 170 170 170 45 45 45

Requiredimpulse with-

stand voltage1)5)

kV

1232

<__________ T2 = 50 µs __________>

(_T _)

T1 = 1,2 µs

%10090

50

30

0

Tests and Testing Procedures According to IEC/EN Standards (continued)Electrical Tests (continued)

• Insulation parameters according to IEC/EN 60664-1

The nominal supply voltages and the corresponding rated impulse voltages applyfor grounded (earthed) as well as for ungrounded (unearthed) circuits.

Nominal voltage Voltage line to neutral Rated impulse voltage2)

of the supply system1) derived from nominal voltages a.c. V(mains) based on IEC 600383) or d.c. up to

V and including Overvoltage category4)

Three-phase Single-phase V I II III IV

50 330 500 800 1500100 500 800 1500 2500150 800 1500 2500 4000

230/400 277/480 120-240 300 1500 2500 4000 6000400/690 600 2500 4000 6000 8000

1000 1000 4000 6000 8000 12000

1) See annex B for application to existing different low-voltage mains and their nominal voltages.2) Equipment with these rated impulse voltages can be used in installations in accordance with IEC 60364-4-443.3) The / mark indicates a 4-wire three-phase distribution system. The lower value is the voltage line-to-neutral,

while the higher value is the voltage line-to-line. Where only one value is indicated, it refers to 3-wire, three-pha-se systems and specifies the value line-to-line.

4) See 2.2.2.1.1 for an explanation of the overvoltage categories.

û

u

The rated impulse voltage shall be selected from table 1 corresponding to theovervoltage category specified and to the rated voltage of the equipment.

Table 1: Rated impulse voltages for equipment energized directly from the low-voltage mains (DIN EN 60664-1/VDE 0110, part 1) ➊ Voltage curve: 1.2/50 µs acc. IEC 60-1 / VDE 0432, part 1

Clearances and creepage distancesGenerally applicable is:The equipment specification containsdata for the measurement of clearan-ces and creepage distances or refers tothe data contained in the new revisededition of the basic standard DIN EN60664-1/VDE 0110, part 1.DIN EN 60664-1/VDE 0110, part 1contains new clearance and creepagedistance data taking into considerationthe rules of insulation. That is the insula-tion parameters of an equipment areassigned to:– the surge voltages expected,– the parameters of the protection

device against surge voltageand– the expected environmental condi-

tions and the protection measuresagainst pollution.

The standard is based on IEC 60664-1,with some modifications.

Clearances, rated impulse voltages,overvoltage categories, pollutiondegreesDecisive for the proportioning of airdistances are the impulse voltages inaccordance with table 1.This basis forms the overvoltage category, i. e. the allocation of the equipment to theexpected surge voltage, and the conductor – earth voltage derivedfrom the rated line voltage in installations with a grounded (earthed)Y (star) point.In ungrounded (unearthed) installations,or in installations where the conductor is not grounded (earthed), the voltagebetween the conductors is applicable inthe same way as conductor voltage toground (earth).

Overvoltage categories for electrical equipment:Specification of a specific impulse withstand category (overvoltage category) shallbe based on the following general explanation:– Equipment of impulse withstand category I is equipment which is intended to

be connected to the fixed electrical installations of buildings. Protective meansare taken outside the equipment – either in the fixed installation or between thefixed installation and the equipment – to limit transient overvoltages to thespecific level.

– Equipment of impulse withstand category II is equipment to be connected tothe fixed electrical installations of buildings.NOTE: Examples of such equipment are household appliances, portable toolsand similar loads.

– Equipment of impulse withstand category III is equipment which is part ofthe fixed electrical installations and other equipment where a higher degree ofavailability is expected.NOTE: Examples of such equipment are distribution boards, circuit breakers,wiring systems (IEV 826-06-01, including cables, bus-bars, junction boxes, swit-ches, socket-outlets) in the fixed installation, and equipment for industrial useand some other equipment, e. g. stationary motors with permanent connectionto the fixed installation.

– Equipment of impulse withstand category IV is for use at or in the proximityof the origin of the electrical installations of buildings upstream of the maindistribution board.NOTE: Examples of such equipment are electricity meters, primary overcurrentprotection devices and ripple control units.

acc. to IEC 60-1 / VDE 0432, part 1

➊ Voltage pulse 1.2/50

1238

<__________ T2 = 50 µs __________>

(_T _)

T1 = 1,2 µs

%10090

50

30

0

This test procedure is used to verify the creepage distances. Creepage distances, i.e. the distances of creeping currents, arecaused by conductive impurities on the surface of the insulation housing. Apart from the amount of impurities to which aterminal block, for example, is subjected, the plastic material and housing design are also involved in generating creepingcurrents. The insulation material of the housing may be carbonized by a creeping current, which increases the conductivityeven more.The specimen is tested using a power-frequency withstand voltage for a short time. For example, a rail-mounted terminalblock designed to operate at 800 V nominal voltage is usually tested using 2000 V alternating voltage for 1 minute. Thetest is considered to be passed if no flashovers or breakdowns have occured.

Tests and Testing Procedures According to IEC/EN Standards (continued)Electrical Tests (continued)

• Power-frequency withstand voltage test according to IEC/EN 60947-7-1, IEC/EN 60947-1

This test is used to verify the clearances of a product. In simplified terms, a clearance is the distance between two poles of aterminal block. If this distance is too small, voltage peaks may cause flashovers or breakdowns. The arrangement of therated impulse withstand voltage test is identical to that of the power frequency withstand voltage test; the test voltages,however, are comparatively higher and the testing times shorter, e.g. 7.3 kV over 50 µs (see figure).

• Rated impulse withstand voltage test according to IEC/EN 60947-7-1, IEC/EN 60947-1

Voltage pulse; measurement curve (red) and auxiliary curve (black) for calculating the rate of rise of the pulse and the resulting (virtual) peak of the curve T Time interval for calculating the rate of riseT1 Front time (duration between start of impulse and reaching the peak)T2 Total pulse duration

The test values are the values at sea level as specified in the relevant test specification.The values indicated in the catalog correspond to an altitude of 2000 m. The test is considered to be passed if no flashovers or breakdowns have occured.

• IP ratings for electrical equipment acc. to IEC/EN 60529

<>

IP Vs. NEMA

ComparisonIP NEMA

Alphanumeric nomenclature for type of protection

Code letters Protection against touch and solid IP = Ingress ProtectionIP objects or water

First characteristic Indicates degrees of protection against If the indication of the degree of protection0 to 6 touch or solid objects requires only one characteristic, the other one

Second characteristic Indicates degree of protection against will be replaced by an X0 to 8 water

First characteristic:

IP 0X No protection against touchor solid objects

IP 1X Protected against solid objects > 50 mmIP 2X Protected against solid objects > 12 mm

(e. g. finger)IP 3X Protected against solid objects > 2.5 mmIP 4X Protected against solid objects > 1 mmIP 5X Dust-protected (limited ingress,

no harmful deposit)IP 6X Dust-tight (totally protected against dust)

Second characteristic:

IP X0 No protection against waterIP X1 Protected against vertically

dripping waterIP X2 Protected against dripping

water –15° angleIP X3 Protected against water sprayIP X4 Protected against water splashIP X5 Protected against water jetIP X6 Protected against powerful water jetIP X7 Protected against temporary

immersionIP X8 Protected against continuous

immersion

IP code NEMA Type

10 111 254 314 3R54 3S55 4 & 4X52 567 6 & 6 P52 12 &12 K54 13

û

u