User Documentation

INSTALLATION INSTRUCTIONS
& CONDITIONS FOR SAFE USE
T II 2 GD Ex eb IIC
TERMINAL TYPE: ZB SERIES NSCH
DEMKO 03ATEX136208 U
IECEx ULD 13.0005U
Notied Body No. 0539
Standards: EN 60079-0:2009 EN 60079-7:2007
IEC 60079-0:2007 IEC 60079-7:2007
General Information:
Busbar assembly type SH… or WEW…, with clamping yokes type ZB…, NSCH for the connection of copper conductors in enclosures in type of explosion
protection increased safety “e”. The following assembly elements are covered in this certication: rail mounting clamps type SH1, SH2, SH2S, SH3,
WEW35/1 or WEW 35/2 and clamping yokes type ZB… ; NSCH (as listed below), to be used with protective conductor mounting rails.
Rating Data:
Operating temperature range -60°C … +180°C (for ZB, NSCH without insulating material)
Operating temperature range -60°C … +100°C (for ZB with PA66 insulating material)
Operating temperature range -60°C … +80°C (for SH1 and SH3 with PA66 insulating material)
Operating temperature range -60°C … +130°C (for SH2 with KRG insulating material)
Operating temperature range -60°C … +100°C (for WEW with Wemid insulating material)
Type Rated conductor cross
section in mm
2
(AWG)
Conductor cross section
rigid in mm
2
(AWG)
Conductor cross section
exible in mm
2
(AWG)
Maximum current in A Tightening torque in Nm
ZB4,
ZB4K,
ZB4G,
ZB4/6,
ZB4/6K
4 (12) Min. 0.5
(20)
Max. 6.0
(10)
Min. 0.5
(20)
Max. 4.0
(12)
28* 0.5
ZBE6,
ZBE6K
6 (10) Min. 1.0
(20)
Max. 10 (8)
Min. 1.5
(20)
Max. 10 (8)
36* 1.2
ZB10
10 (8)
Min. 1.5
(16)
Max. 10 (8)
Min. 1.5
(16)
Max. 10 (8)
50* 1.2
ZB16
ZB16/6K,
ZBE16K
ZB16K,
ZB16/6
16 (6)
Solid:
Min. 2.5
(14)
Max. 16 (6)
Min. 2.5
(14)
Max. 16 (6)
Stranded:
Min. 16 (6)
Max. 25 (4)
66* 1.2
ZB35,
ZB35K
35 (2) – Min. 16 (64)
Max. 35 (0)
Stranded:
Min. 16 (6)
Max. 50 (4)
109* 2.5
NSCH 2,5 (14) 2,5 (14) 2,5 (14) 24 per clamping unit;
72 NSCH
2
* 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
Certicate of the complete apparatus.
Mounting instructions:
The Busbar assembly type SH… or WEW…, with clamping yokes type ZB…, NSCH are suitable for application in enclosures in atmospheres with
ammable gases and combustible dust. For use in ammable 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.
Regarding the use of accessories the instructions of the manufacturer must be followed.
Regarding the use of accessories the instructions of the manufacturer must be followed.
Schedule of Limitations:
The Earthing and Neutral Busbar assembly described above is considered to form one component, with Ex marking applied to the busbar holders type
SH and WEW.. If used independently, the above mentioned parts are not covered by this certicate.
The maximum temperature rise was determined as 14,2K (for busbar system type ZB).
The maximum temperature rise was determined as 23,9K (for busbar system type NSCH).
Weidmüller Interface GmbH & Co. KG
Klingenbergstrasse 16, 32758 Detmold - Germany
Tel. [phone] - 14-0 • Fax [phone] - 1429-2083 1400540000/01/03.13 – ATEX NSCH