Document of Conformity

IECEx Certificate

of Conformity

Certificate No.: IECEx ULD 14.0005U

Date of issue: 2020-04-20

Page 3 of 4

Issue No: 6

Ex Component(s) covered by this certificate is described below:

SCHEDULE OF LIMITATIONS:

Feed through terminal blocks type WDU and protective conductor terminal blocks type WPE are for the connection of copper conductors in

enclosures. The type of protection is increased safety, “e”, insulating parts made of Polyamide PA 66, with optional accessories, type WQV

screw in cross-connectors, type ZQV plug-in cross-connectors, type LS2.8 shield bus, type WEW end brackets, type WTW partitions, type

WAP end plates for fixing on mounting rails.

Please see Annex for additional information.

PlePl

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The feed through and protective conductor terminal blocks are suitable for use in enclosures in atmospheres with flammable gases and

combustible dust. For flammable gases these enclosures must satisfy the requirements according to IEC 60079-0 and IEC 60079-7.

For combustible dust these enclosures must satisfy the requirements according to IEC 60079-31.

The terminal blocks shall be placed inside a suitable IECEx certified IP54 enclosure for gas atmosphere. For dust atmosphere the

terminal blocks shall be mounted inside a suitable IECEx certified ‘t’ enclosure (IEC 60079-31).

The enclosure shall be constructed to block all sun and UV light from affecting the terminal blocks.

Under normal operating conditions the temperature rise of the terminal blocks is max 40 K, measured with 110% of the maximum rated

current . Due to the above mentioned the terminal blocks may be used in apparatus of temperature classes T6…T1, as long as the

terminal block ambient temperature range is not exceeded as shown below. No part of terminal block must exceed 110 °C under any

condition.

T6 (- 60°C ≤ Tamb ≤ +40 °C)

T5 (- 60°C ≤ Tamb ≤ +55 °C)

T4 (- 60°C ≤ Tamb ≤ +70 °C)

When using the types WDU and WPE with other terminal blocks series or sizes or accessories, the requirements for clearance and

creepage distances according to table 2 of IEC 60079-7 must be observed. Regarding the use of covers, cross-connectors and end

brackets the instructions of the manufacturer must be followed.

For terminal jumper accessories current ratings and the resistances across the terminals please refer to the table under “types &

electrical rating” above. Details on creepage and clearance values and the required torque values are in the respective “Notice to

installers”.

The terminal can be used with either one or two wires into either side of the terminal. When two wires are used they must be of the

same type, and of equal sizes. No other wire sizes or types than the ones specified in instructions must be used. The terminal blocks

must either be mounted next to another block of the same type and size or with an end plate.

If smaller conductor cross sections than the rated conductor cross sections are used, then the corresponding lower current shall be

stated in the Certificate of the complete apparatus.

Unused terminals shall be tightened.