Technical Section WAGO

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5 12.5 4. Table F. Open, unprotected insulated equipment air-conditioned or clean, dry rooms Pollution degree Only non-conductive pollution occurs.5 0.02 0.06 0.15) Case B Homogeneous Field (see 3. Occasional, temporary conductivity caused conden- sation can also expected.5 20 8 25 10 30 12. Pollution degree Conductive pollution occurs, or dry, non-conductive pollution occurs which will become con- ductive due condensation.3.04 0. Equipment with clearance that dimen- sioned per Case other words rated for the most unfavorable case, requires veri- fication the impulse voltage test.5 40 17 50 22 60 27 80 130 130 130 35 100 170 170 170 45 Pollution Degrees Pollution factors are all solid, liquid gaseous foreign matter which may reduce the dielectric strength the specific surface resistance. The clearances shown Table F.6 mm.2) Select the minimum clearances accor- dance with the rated surge voltages and pol- lution degrees.45 2.5 3.6. Open, unprotected insulated equipment occupied areas, shops, laboratories, mechanical workshops and medical rooms.wago. Open, unprotected insulated equipment for outdoor use .25 0.3.4.4 0.06 0.3.84) 0. 4) The minimum clearances given for pollution degree 2 and are based the reduced withstand characteris- tics the associated creepage distance under humidity conditions (see IEC 60664-5).1.02 0.g. Equipment with clearance that dimen- sioned per Case between and B, requires verification the impulse voltage test. maximize the operating life of the equipment, not below these min- imum clearances.2 Clearances Withstand Transient Overvoltages DIN 60664-1/VDE 0110-1 Required Impulse Withstand Voltage1)5) Minimum Clearances Air 2000 Above Sea Level Case A Inhomogeneous Field (see 3.5 0. Pollution has influ- ence.23)4) 0.04 0.2 1.5 4.04 mm, specified Table F.15 1.5 0.5) • Basic insulation directly exposed significantly influ- enced transient overvoltages from the low-voltage mains (see 4.84) 0.3 2 0.5 1.3.82) 0.3.com WAGO Rail-Mount Terminal Block Systems Technical Information Dimensioning Clearances (DIN 60664-1/VDE 0110-1, Table F.2 5 1.2, interpolation values is allowed.52) 0.3.4.8 42) 3 1. Values for clearances above 2000 must be multiplied high correction factor in accordance with Table A.2 are appli- cable for installation height 2000 m above sea level.5 3. This involves electric field with essentially constant (Case non-constant (Case A) voltage gradients between the electrodes.2.52) 1., unheated rooms, workshops and boiler rooms) Pollution degree The pollution generates per- sistent conductivity caused by conductive dust, rain wet conditions.4. 5) For parts circuit within equipment subject surge voltages based 4.3, 4.2.2.2 0.5 2 82) 8 3 10 3.5 5. 6) The dimensions for pollution degree are specified for pollution degree except that the minimum clear- ance 1. Factors are divided into four classes based on expected environmental conditions: Examples pollution degrees for assigned areas: Pollution degree pollution, only dry, non-conductive pollution occurs.2 contains list information for Case the inhomogeneous field and for Case the homogeneous field.14) Pollution Degree6 Pollution Degree6 1 3 kV mm 0.1.5 122) 14 4.10 0.3.3 3) For printed wiring material, the values for pollution degree apply, except that the value must not less than 0.5 12.6): the rated impulse voltage for the equipment; • Other basic insulation (see 4.5 5. Table F.10 1 0.5 1.5 15 5.15 0.1 and 5. Open, unprotected insulated equipment industrial, busi- ness and farming areas e.3 0.8 0.5 1. However, standardization achieved using the preferred series impulse voltage values based on 4.2 1.332) 0.6 0.1.2 1.23)4) 0.15 www.6 3 0.01 0.25 0.5 1.45 0. 2) Preferred values specified 4.01 0.5 5.5 62) 5.52) 0.3.3.4.6 0. 1) This voltage for: • Functional insulation: the maximum impulse voltage expected occur across the clearance (see 5.5 5.2): the highest impulse voltage that can occur the circuit For reinforced insulation, see 5