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 standards EN 60947-5-1, EN 60079-0, EN 60079-1, EN 60079-31
Enclosure aluminium die-cast, hard-coated, powder-coated, anthracite grey, similar to RAL 7016
Cover stainless steel 1.4404, powder-coated, signal yellow, similar to RAL 1003
Degree of protection IP 66/67 to IEC/EN 60529
B10d (10 % load) 2 million
TM max. 20 years
Contact material silver, gold-plated
Switching elements 1 NC/1 NO contact, type Zb
Switching system slow action
Connection cable BETAflam 145 flex
Cable cross-section 4 x 0.75 mm² (incl. conductor ferrules)
Rated impulse withstand voltage Uimp 4 kV
Rated operating isolation voltage Ui 250 V
Conventional thermal current Ithe T6: 6 A, T5: 3 A
Utilisation category AC-15; DC-13
Rated operating current/voltage Ie/Ue 6 A/250 VAC; 0.25 A/230 VDC
Short-circuit protection 6 A gG/gN fuse
Ambient temperature T6: –40 °C ... +65 °C,
T5: –40 °C ... +75 °C, +95 °C with max. 3 A
Mechanical life > 1 million operations
Impact energy max. 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
Approvals PTB 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.