Ex ST 61

  • Ex zone 1 and 21
  • Metal enclosure
  • Double insulated
  • With pre-wired cable
  • Long life
  • High level of contact reliability with low voltages and currents
  • Special version only for dust Ex zone 22 available
  • Attention: Please state required international approvals with your order!
Note
  • The actuator is not included in the delivery of the switches

Technical data

Applied standards EN 60947-5-1, EN 60079-0, EN 60079-1, EN 60079-31, EN ISO 13849-1, EN ISO 14119
Enclosure aluminium die-cast, powder-coated
Cover steel, powder-coated
Actuator stainless steel 1.4301
Switch type type 2
Coding level low coding
Degree of protection IP 65 to IEC/EN 60529
B10d (10 % load) 2 million
TM max. 20 years
Switch insert 1 x Ex 14
Contact material silver
Switching system slow action, positive break NC contacts
Switching elements 1 NC/1 NO contact, type Zb
Connection pre-wired cable H05VV-F
Cable cross-section 4 x 0.75 mm² (incl. conductor ferrules)
Cable length 3 m
Rated impulse withstand voltage Uimp 4 kV
Rated insulation voltage Ui 250 V
Conventional thermal current Ithe T6: 6 A, T5: 3 A
Rated operating current/voltage Ie/Ue 6 A/250 VAC; 0.25 A/230 VDC; 3 A/24 VDC; 3 A/24 VDC
Utilisation category AC-15; DC-13
Short-circuit protection 6 A gG/gN fuse
Positive break travel 12 mm
Ambient temperature T6: –20 °C … +65 °C,
T5: –20 °C … +75 °C, +90 °C with max. 3 A
Mechanical life > 1 million operations
Impact energy max. 7 J
Ex marking II 2G Ex db IIC T6/T5 Gb,
II 2D Ex tb IIIC
T80 °C/T95 °C Db
IECEx Ex db IIC T6/T5 Gb,
Ex tb IIIC T80 °C/T95 °C Db
Approvals PTB 03 ATEX 1070 X *
IECEx PTB 06.0098X *
* referring to the switch insert

Ordering details

Slow action, 1 NC/1 NO contact

Type   Material no.  
Type    Material no.   
Ex ST 61 1Ö/1S - 3m 1047851
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Actuators

Type   Material no.  
Type    Material no.   
Straight actuator ST 61-B1 stock type Standard versions, in stock or available at short notice 1471527
Type   Material no.  
Type    Material no.   
Angled actuator ST 61-B5 stock type Standard versions, in stock or available at short notice 1471643