6
GB
Explosions protected installation switches
type GHG 273
Dimensions in mm
Wiring diagrams
X = Fixing dimensions
1
Technical data
Marking acc. to 2014/34/EU
D
II 2 G Ex de IIC T6
and standard:
D
II 2 D Ex tD A21 IP66 T 80° C
EC type examination certificate:
PTB 98 ATEX 3121
Rated voltage:
up to 250 V; 50/60 Hz
Rated current:
max. 16 A
Short circuit back-up fuse:
max. 20 A gL
Switching capacity EN 60947-4-1 AC 5a:
230 V / 16 A
Switching capacity EN 60947-4-2 AC 5b:
230 V / 16 A
Perm. ambient temperature:
(Special versions permit deviating temperature ranges)
-20° C up to +40° C (catalogue version)
Perm. storage temperature in original packing:
-20° C up to +40° C
Protection category acc. to EN/IEC 60529:
IP 66 ( catalogue version)
Insulation class acc. to EN/IEC 61140:
I - is complied with by the installation switches
Cable entry (catalogue version):
1 x M25 or 2 x M25
2 x drilling M20
suitable cables and test torques of the
pressure srew
Ø
Nm
Seal 1+2+3
1
2
3
min.
max.
(1)(2)
8.0
10.0
1.5
2.0
Seal 1+2
1
2
3
min.
max.
(1)(2)
10.0
13.0
2.3
2.6
Seal 1
1
2
3
min.
max.
(2)
13.5
17.5
1.3
2.3
Supply terminal:
2 x 1.5 - 2.5 mm²
PE-terminal:
4 x 1.5 - 2.5 mm²
Test torques:
Test torque for screw in thread cable entry
3.0 Nm
Cover screws
2.0 Nm
Terminals
2.5 Nm
Weight (catalogue version):
approx. 0.32 kg
(1)
The tests of clamping ranges and torque values were performed with metal mandrel. The clamping range can
vary by using cables with different manufacturing tolerances and material properties. Please use the
combination of sealing 1 + 2 + 3 for the intermediate region.
(2)
When selecting the seal rubber, ensure that the pressure screw can be tightened when carrying out any
future maintenance work on the cable entry.
GHG 273
85
X75
85
115
53
X5
2
5.6
20
6.7
64
55
85
X75
85
115
35
X5
2
5.6
20
6.7
64
55
The switch function is only realized
with closed enclosure cover
On-Off switch 2-pole
Change over switch
1S+1Ö
Push button switch
1S+1Ö
L
L(N )
L
L(N )
L
2
Safety instructions
a
The operations must be carried
out by electrical suitably trained in
hazardous area with knowledge of
increased safety explosion protection
IEC/EN 60079-14.
The installation switches are not suitable for
Zone 0 and Zone 20 hazardous areas.
The temperature class and explosion group
marked on the installation switches shall be
observed.
They shall be used for their intended
purpose and in perfect and clean condition.
The requirements of the IEC/EN 60079-31
regarding excessive dust deposits and
temperature to be considered from the user.
Prior to taking the installation switches
into operation, they shall be checked in
accordance with the instruction as per
section 6.
Observe the national safety rules and
regulations for prevention of accidents as
well as the safety instructions included in
these operating instructions and set in
italics the same as this text!
3
Conformity with standards
They have been designed, manufactured and
tested according to the state of the art and to
DIN EN ISO 9001:2015 and
EN ISO/IEC 80079-34:2011.
The apparatus are conform to the standards
specified in the EC-Declaration of conformity,
enclosed separately.
4 Field of application
The installation switches are suitable for use in
Zones 1 and 2 as well as in Zones 21 and 22
hazardous areas acc. to IEC/EN 60079-10-1 and
IEC/EN 60079-10-2!
The enclosure materials employed, including
the exterior metal parts, are made of high-
quality materials which ensure a corrosion
protection and resistance to chemical
substances corresponding to the requirements
in a “normal industrial atmosphere”:
– impact resistant polyamide
– special steel AISI 316 L
In case of use in an extremely aggressive
atmosphere, please refer to manufacturer.
