Two-position Ex ATEX safety switches (on/off):
Suitable for Ex zones: 1, 2, 21, 22
Multifunctional – can be used as main disconnector, operating switch and safety component (Use category: AC-3, AC-23)
They have a long service life with many cycles of operation
You will put the padlocks in place as required by LOTO procedures
One device and many functions also means reduced costs for installation and subsequent service
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Insight into electrical diagrams from the data sheet
Technical data:
Certifications: ATEX, IECEx
ATEX designation:
II 2 G Ex db eb IIC T5/T6 Gb
II 2 D Ex tb IIIC T85oC Db
IECEx designation:
Housing material: SMC (GRP)
Knob size:
diameter: 105mm
overall width with handle: 120mm
Permissible ambient temperature: -40°C to +55°C
Degree of protection: IP66
Rated voltage: 230V – 690V
Rated current: 20A – 80A
In stainless steel housing: 20A-180A
Short-circuit protection
(fuse ratings):
20A/25A: 20kA, 500V/35A
30A/40A: 20kA, 500V/63A
63A/75A/80A: 50kA, 500V/160A
gG fuse (IEC/EN 60269-1)
Rated insulation voltage (Ui): 800V
Rated surge voltage (Uimp): 6kV
Rated short-lasting residual current (Icw):
3kA for 20A, 25A, 35A, 40A
10kA for 63A, 75A, 80A
Rated short-circuit breaking capacity (Icm):
4kA for 20A, 25A, 35A, 40A
17kA for 63A, 75A, 80A
Conductor cross-sections:
20A/25A: 2×1.5 to 4mm²
35A/40A: 2×10mm²
63A/75A/80A: 2×16 to 25mm²
Price:
Service safety – the LOTO system
Ex HARDO safety switches allow the use of three padlocks to lock the knob in the “OFF” position, as required by the LOTO (Lockout/Tagout) procedure.
Prevent accidental switching on
Possibility of simultaneous locking by several persons
OSHA compliant, EN 1037
Simple and integrated operation
Category of use: AC-3 / AC-23
Ex ATEX HARDO safety switches meet the requirements of use category AC-3 and AC-23 according to IEC 60947-3, which means that they can be used not only as disconnectors but also as operating switches – for switching and disconnecting circuits under load or as isolating switches.
Use category characteristics:
AC-3: designed to control squirrel-cage motors: starting and stopping during normal operation,
AC-23: handling inductive loads (e.g. motors, transformers): frequent connection and disconnection under load.
Thus, the HARDO safety switch can simultaneously act as a main disconnector, operating switch and safety system component in hazardous areas, simplifying the installation and increasing its reliability.
Construction and durability of SMC composite housing
HARDO safety switches have a housing made of durable glass fibre-reinforced SMC (Sheet Moulding Compound), which guarantees resistance to mechanical damage and adverse environmental conditions.
SMC material properties:
mechanical resistance: up to 90% of original strength after 20 years
Compliant with ISO 4892 (UV, temperature, humidity)
UL 746C certification
Thermal and electrical insulation
Chemical and fire resistance
No corrosion, no maintenance
Low weight – easy installation
High surface durability
HARDO safety switch – reliable safety in Ex zones
The HARDO safety switch is a device designed for emergency power disconnection in installations operating in explosive atmospheres. It meets the requirements of the ATEX Directive 2014/34/EU and IECEx and enables effective circuit interruption in under-load operation – in accordance with use categories AC-3 and AC-23 according to IEC 60947-3
Application
Machine and process line safety main switch
Emergency Disconnection in Emergency Situations (EMO)
Service protection for maintenance work (LOTO compliance)
Disconnection of motors, transformers, heaters and inductive equipment
In combination with automation systems it can act as a power status indicator
Individual configuration of the safety switch
In addition to the standard catalogue offering, we also offer the possibility of fully customising safety switches for hazardous areas. Each model can be adapted to individual technical requirements and application conditions. Our flexible approach to configuration allows us to meet even non-standard customer expectations. It is this modifiability that is one of our key advantages. As a result, our solutions are suitable for both typical installations and projects with increased requirements.
Electrical contacts
Main contacts: 3, 4, 5 or 6
Auxiliary contacts:
NO / NO + NC / 2NO
PE / PE + N / PE + N disconnected
Contact material: silver alloy
Cable glands
polyamide (M16-M63; up to 16 pieces)
metal: brass / nickel-plated brass / stainless steel (M16-M63; up to 12 pieces)
for unreinforced / reinforced / shielded cables
earthing through the brass plate to the outside of the switch via the earthing screw
Additional components
Thanks to its modular design, you can configure the switch to suit your needs.
LED indicator lights
Ammeters and voltmeters
Control and emergency buttons
Cam and selector switches
Potentiometers for adjustment
Operating instructions
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