Ex ZS 73 HES

  • Ex zone 1 and 21
  • Pull-wire unit made of stainless steel 1.4404, hard-coated housing, cover made of stainless steel 1.4404, screws A2
  • Cold-resistant down to -40 °C
  • High degree of protection IP 66 / IP 67
  • Watertight collar W for protection against penetration of dirt available
  • 2 contacts
  • Tractive force 120 N (counterweight of min. 12 kg to pretension anti-two-block switch)
  • For limiting the hoist height

Technical data

Applied standardsEN 60947-5-1; EN 60079-0,
EN 60079-1, EN 60079-31
Enclosurealuminium die-cast, hard-coated and powder-coated, similar to RAL 7016 anthracite
CoverStainless steel 1.4404, powder-coated, similar to RAL 1003
Degree of protectionIP 66/67 to IEC/EN 60529
Contact materialsilver, gold-plated
Switching elements1 NC/1 NO contact, type Zb
Switching systemslow action
Connectioncable BETAflam 145 flex
Cable cross-section4 x 0.75 mm² (incl. conductor ferrules)
B10d (10 % load)2 million
TMmax. 20 years
Rated impulse withstand voltage Uimp4 kV
Rated operating isolation voltage Ui250 V
Conventional thermal current ItheT6: 6 A, T5: 3 A
Utilisation categoryAC-15; DC-13
Rated operating current/voltage Ie/Ue6 A/250 VAC; 0.25 A/230 VDC
Short-circuit protection6 A gG/gN fuse
Ambient temperatureT6: –40 °C ... +65 °C,
T5: –40 °C ... +75 °C, +95 °C with max. 3 A
Mechanical life> 1 million operations
Impact energymax. 7 J
Ex marking II 2G Ex d IIC T6/T5 Gb,
II 2D Ex tb IIIC
T80 °C/T95 °C Db
IECEx Ex d IIC T6/T5 Gb,
Ex tb IIIC T80 °C/T95 °C Db
ApprovalsPTB 11 ATEX 1003 X
IECEx PTB 07.0034 X

Ordering details

Slow action

1 NC/1 NO contact

Type   Material no.  
Type    Material no.   
Ex ZS 73 1Ö/1S W HES 5m 120N -40°C Niro 1401136
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.