INSTALLATION INSTRUCTIONS
& CONDITIONS FOR SAFE USE
II 2 GD
Ex eb IIC Gb
Modular TERMINAL Blocks: A- Series
TÜV 16 ATEX 7909 U
IECEx TUR 16.0036 U
Notified Body No. of Ex – QA: 0344
Label print on package unit: 0344
TÜV21UKEX7001U
Approved Body No. of UK Ex – QA: xxxx
(see product marking)
A Series Modular Terminal Blocks
Standards:
EN 60079-0:2018 and EN 60079-7:2015 A1:2018
IEC 60079-0: 7th Edition and IEC 60079-7: 5.1th Edition
Modular Terminal Blocks: A3C 2.5
| Version: | A3C 2.5* | Order No 1521740000 |
| in conjunction with: | A3C 2.5 PE | Order No 1521670000 |
| Accessories: | Type | Order No |
| end plate | AEP 3C 2.5* | 1.52E+09 |
| end bracket | AEB 35 SC/1* | 1.99E+09 |
| Terminal rail | TS 35/… acc.to DIN EN 60715 | |
| Cross-connection | Plugable ZQV 2.5N/2* ZQV 2.5N/3* ZQV 2.5N/4* ZQV 2.5N/5* ZQV 2.5N/6* ZQV 2.5N/7* ZQV 2.5N/8* ZQV 2.5N/9* ZQV 2.5N/10* |
Order No 1527540000 1527570000 1527590000 1527620000 1527630000 1527640000 1527670000 1527680000 1527690000 |
Insulation material:
| – Type | Wemid |
| – Tracking resistance (A) to IEC 60112 | CTI ≥ 600 |
| – Flammability class to UL 94 | V0 |
| – Operating temperature range | -60°C…+110°C (insulating material limit) |
| – Ambient temperature range | -60°C…+40°C (for T6 applications) |
| – Ambient temperature range | -60°C…+55°C (for T5 applications) |
| – Ambient temperature range | -60°C…+70°C (for T4 applications) |
* in all colours
Technical data according to IEC/EN 60079-7 (increased safety “eb”):
| A3C 2.5 | A3C 2.5 PE | |
| – Rated voltage | 550 V | |
| – Rated current | 21 A / ΔT ≤ 40 K | |
| – Rated current with ZQV | 21 A / ΔT ≤ 40 K | |
| – Contact resistance with rated conductor, 2.5 mm² | 0,8 mΩ | |
| – Rated conductor cross section | 2,5 mm² | 2,5 mm² |
| – Conductor cross section solid | 0,5 – 2,5 mm² | 0,5 – 2,5 mm² |
| – Conductor cross section stranded | 0,5 – 2,5 mm² | 0,5 – 2,5 mm² |
| – Conductor cross section flexible | 0,5 – 2,5 mm² | 0,5 – 2,5 mm² |
| – cross section, American Wire Gauge | 28 – 12 AWG | 28 – 12 AWG |
| – Stripping length | 10 mm | 10 mm |
IECEx / ATEX / UKCA Terminal and Cross-Connection Arrangements:
Max voltage data according to IEC/EN 60079-7 in conjunction with protective earth terminal blocks of the A-Series, (increased safety “eb”):
Application Case
A – Continuous no difference between one or two cross connections
440 V
C – Adjacent – separated by an end plate no difference between one or two cross-connections
550 V
D – Intermediate – bridging one or more unconnected terminals (e.g. every 3rd terminal) no difference between one or two cross connections
352 V
F – Next to a protective conductor terminal (earth) with end plate
550 V
H – Cross-connection with twin parallel
220 V
Note:
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 Feed-through terminals and PE terminals of the A-series are 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. Regarding the use of accessories the instructions of the manufacturer must be followed.
Schedule of Limitations:
The Feed-through terminals and PE terminals of the A-series are suitable for use in enclosures in atmospheres with flammable gases or combustible dust. For flammable gases these enclosures must satisfy the requirements according to IEC/EN60079-0 and IEC/EN60079-7. For combustible dust the enclosure must satisfy the requirements according to IEC/EN60079-0 and IEC/EN60079-31.
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 (EN60079-31) in type of protection “t”.
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 110 °C under any condition.
T6 (- 60°C … +40 °C)
T5 (- 60°C … +55 °C)
T4 (- 60°C … +70 °C)
When using the types A3C 2.5 and A3C 2.5 PE especially with other terminal blocks series or sizes or accessories the requirements for clearance and creepage distances according to IEC/EN60079-7 must be observed. Regarding the use of covers, cross-connectors and end brackets the instructions of the manufacturer must be followed.
For cross connection accessories current rating, resistance across the terminal please refer to the table under “Technical data” above.
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.
– Cross connections with blank ends shall not be used.
– Manually cut cross connections shall not be used.
Essential Health and Safety Requirements:
Concerning ESRs this Schedule verifies compliance with the Annex II of ATEX / Schedule 1 of UKCA directive and Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres Regulations 2016 only. By placing the product on the market, the manufacturer declares compliance with other relevant Directives, and all other safety related requirements including those of Annex II / Schedule 1 of these Directives.
Weidmüller Interface GmbH Co. KG; Klingenbergstraße 26, 32758 Detmold-Germany
Version: A3C 2.5; 10652171
Index: 04
Date: 11.2021
Documents / Resources
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weidmuller A Series Modular Terminal Blocks [pdf] Instruction Manual A3C 2.5, A3C 2.5 PE, A Series Modular Terminal Blocks, A Series, Modular Terminal Blocks, Terminal Blocks, Blocks |
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Weidmuller A Series Modular Terminal Blocks [pdf] Instruction Manual A3T 1.5, 2817990000, 2818000000, 2816950000, 1991920000, A Series Modular Terminal Blocks, A Series, A Series Terminal Blocks, Modular Terminal Blocks, Terminal Blocks, Modular Blocks, Blocks |