User Documentation

Weidmüller Interface GmbH Co. KG; Klingenbergstraße 16, 32758 Detmold-Germany
Under normal operating conditions the temperature rise of the terminal blocks is maximum 40 K, measured at the maximum permitted 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. No part of terminal block must exceed 100 °C under any condition.
T6 (- 60°C ... +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C ... +55 °C)
When using the type WPD especially with other terminal blocks series or sizes or accessories the requirements for clearance and creepage distances
according to table 1 of IEC/EN 60079-7 must be observed. Regarding the use of covers, cross-connectors and end brackets the instructions of the
manufacturer must be followed.
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.
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.
Schedule of Limitations:
The modular terminal blocks (busbar) models WPD 104 to WPD 109 shall always be installed inside suitable certified enclosures. For use in flammable
gases these enclosures must satisfy the requirements conform IEC/EN 60079-0 and IEC/EN 60079-7. For use in combustible dust these enclosures
must satisfy the requirements conform IEC/EN 60079-0 and IEC/EN 60079-31.
When installed, all connections, even if unused, shall be tightened with the torques specified in the manufacturer’s instructions.
The transparent covers are always to be applied on the terminal blocks (busbar).
For each modular terminal block (busbar), there shall always be only one cable installed in the incoming connection side of the terminal block (busbar).
When flexible busbar connections are used instead of wires (applicable only for WPD 106, WPD 108 and WPD 109), these flexible busbar connections
shall comply with the requirements of IEC/EN 60079-7.
Multiple wires installed into one connection are not allowed.
When combined with other terminal block (busbar) series and accessories, the applicable creepage and
clearance distances shall be observed.
The insulation material has a limiting temperature of +100 °C.
The temperature rise in the terminals does not exceed 40 K at 110 % of the rated current.
The enclosure shall be constructed to block all sun and UV light from affecting the terminal blocks. The terminal blocks shall be placed inside a suitable
certified IP54 enclosure in type of protection “e” for gas atmosphere. For dust atmosphere the terminal blocks shall be mounted inside a suitable certified
enclosure (IEC/EN60079-31) in type of protection “t”.
Note:
The creepage and clearance distances were determined in the worst case. (with tightened srew)
If smaller cross sections than the rated cross section are used, the belonging lower current has to be laid down in the IECEx/EC-Type Examination
Certificate of the complete apparatus.
Mounting instructions:
The WPD series is suitable for application in enclosures in atmospheres with flammable gases or combustible dust. For use in flammable gases these
enclosures must satisfy the requirements according to IEC/EN60079-0 and IEC/EN60079-7. For use in combustible dust these enclosures must satisfy
the requirements according to IEC/EN60079-0 and IEC/EN60079-31.
In combination with other terminal block series and sizes and if other accessories are used, the applicable creepage and clearance distances shall be
met.
To connect 2 wires in 1 connection point, please use twin end ferrules with DIN or Weidmüller colour code in combination with the correct Weimüller
Crimping Tool.
Regarding the use of accessories the instructions of the manufacturer must be followed.
Version: WPD 108 8984748 Index: 01 Date: 2017/09
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