Ex 99 ST

  • Ex zone 1 and 21
  • Thermoplastic enclosure, double insulated
  • Cold-resistant (storage/Ex protection down to –60 °C; mechanical function down to –50 °C)
  • High degree of protection IP 66 / IP 67 / IP 69
  • Wiring compartment
  • Mounting details to EN 50041
  • N.B.: Please state required international approvals with your order!
Note
  • The actuator is not included in the delivery of the switches

Technical data

Applied standardsEN 60947-5-1; EN 60079-0,
EN 60079-1, EN 60079-7,
EN 60079-31; EN ISO 13849-1;
EN ISO 14119
Enclosureglass-fibre reinforced, shock-proof thermoplastic, self-extinguishing UL 94 V-0
Coverglass-fibre reinforced, shock-proof thermoset material, self-extinguishing UL 94 V-0
Switch typetype 2
Coding levellow coding
Switch insertType 8080/1 ...
Degree of protectionIP 66 (EN 60079-0 + IEC/EN 60529)
IP 67, IP 69 (IEC/EN 60529)
IP 69K (ISO 20653)
Contact materialSilver, nickel-plated
Switching systemslow action, positive break NC contacts
Switching elements1 NC/1 NO contact or 2 NC contacts, type Zb
Connectionscrew connection terminals
Cable cross-sectionmin. 0,75 mm² / AWG 18, max. 1,5 mm² / AWG 16, incl. conductor ferrules
Cable entryM20 x 1,5; screwing depth max. 9 mm; use only Ex approved and certified cable glands with min. degree of protection IP 66 and suitable for the specified ambient temperature range
B10d (10 % load)2 million
TMmax. 20 years
Utilisation categoryAC-15
Rated operating current Iemax. 2 A or 4 A
Rated operating voltage Uemax. 500 VAC, 2Ö: max. 400 VAC
max. 250 VAC for unequal potential
Mechanical life> 1 million operations
Impact energymax. 7 J down to -40 °C
max. 4 J down to -60 °C
Temperature classT6
Ambient temperature–50 °C … +55 °C max. 4 A, +60 °C max. 2 A
Storage and shipping temperature–60 °C ... +60 °C
Max. fuse rating2 A / 4 A gG/gN fuse
Ex marking II 2G Ex db eb IIC T6 Gb,
II 2D Ex tb IIIC T80 °C Db
IECEx Ex db eb IIC T6 Gb,
Ex tb IIIC T80 °C Db
ApprovalsBVS 16 ATEX E113 X
IECEx BVS 16.0076X

Ordering details

Slow action

1 NC/1 NO contact

Type   Material no.  
Type    Material no.   
Ex ES 99 ST-11 -60°C X stock type Standard versions, in stock or available at short notice 1354452
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Slow action

2 NC contacts

Type   Material no.  
Type    Material no.   
Ex ES 99 ST-02 -60°C X 1442235
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Actuators

Straight actuators

Type   Material no.  
Type    Material no.   
Straight actuator ST 98/99-B1 stock type Standard versions, in stock or available at short notice 1451618
Type    Material no.   
Straight actuator ST 98/99-B1 with rubber stock type Standard versions, in stock or available at short notice 1451736

Angled actuators

Type   Material no.  
Type    Material no.   
Angled actuator ST 98/99-B5 stock type Standard versions, in stock or available at short notice 1451863

Flexible actuators

Type   Material no.  
Type    Material no.   
Flexible actuator ST 98/99-B6 stock type Standard versions, in stock or available at short notice 1451865