
Interchangeable with switches from leading manufacturers:

Designed for Ex zones: 1, 2, 21, 22

Five protections (overload, short-circuit, thermal, phase loss, undervoltage – optional)

The overload protection follows tripping characteristics comparable to those used by leading manufacturers.

Large dial ⌀ 97 mm, for easy operation with gloves

LOTO locking option (three padlocks)
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Technical data:

Dimensions: please see details below

Certifications: ATEX, IECEx

ATEX designation:

IECEx designation:

Housing material: GRP

Knob size: Ø 97 mm

Permissible ambient temperature: -40°C to +55°C

Degree of protection: IP66

Rated voltage: 440 V

Protections applied: overload; phase loss; short circuit; thermal; undervoltage (optional);

Overload trip setting range: 0.1 to 25 A

Switching capacity of motor in AC3 category: up to 440 V / 25 A

Main contacts: 1 – 10 mm² (6 – 10 mm² using collets)

Auxiliary contacts: 1 – 2.5 mm²

Auxiliary contact capacity: AC15 1 A / 230 V

Rated switching capacity: high (up to 65 kA)
Price:




5 types of security – 100% as offered by major market players
01/ OVERLOAD
02/ SHORT-CIRCUIT PROTECTION
03/ THERMAL
04/ PHASE LOSS
05/ UNDERVOLTAGE (optional)
Overload protection
The motor circuit breakers for hazardous areas have built-in overload protection, which protects the motor not only against long-term overload, but also against frequent restarts or brief overloads that can lead to overheating of the windings. The motor circuit breakers are available with adjustable overload protection in the 0.1–25 A range. The unit is rated for 440 V operation.
Setting ranges (0.1 – 25 A)
The pre-setting of the appropriate trip current value takes place at the production stage, according to the customer’s requirements and the application of the circuit breaker in question. It is also possible to adjust the range directly on site.
For values of the overload ranges, see table below.
Overload trip setting range
14623_029672-e2>
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Rated switching and breaking capacity
14623_fdb6c9-e1>
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Cable glands
14623_e9b024-43>
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Part number
14623_bc8659-78>
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---|---|---|---|
0.1 – 0.16 A 14623_f1c691-ac> |
65 kA 14623_3e95c3-a8> |
2 x M25 14623_1cafe4-cb> |
HCS1P 252616 S01211 14623_9605de-69> |
0.16 – 0.25 A 14623_d7e848-0f> |
65 kA 14623_902778-7c> |
2 x M25 14623_6239f9-8f> |
HCS1P 252616 S01221 14623_55e999-5b> |
0.25 – 0.4 A 14623_be3fc2-1b> |
65 kA 14623_a2f29d-d1> |
2 x M25 14623_c7705a-e7> |
HCS1P 252616 S01231 14623_9b936c-9e> |
0.4 – 0.63 A 14623_c2f6ec-45> |
65 kA 14623_1cb544-38> |
2 x M25 14623_469d55-d2> |
HCS1P 252616 S01241 14623_53400b-58> |
0.63 – 1 A 14623_f8093d-71> |
65 kA 14623_4591de-9e> |
2 x M25 14623_0dc45a-7b> |
HCS1P 252616 S01251 14623_0830ec-f7> |
1 – 1.6 A 14623_b56d2f-56> |
65 kA 14623_d4fc0b-03> |
2 x M25 14623_1342bf-e6> |
HCS1P 252616 S01261 14623_d9a7ae-d2> |
1.6 – 2.5 A 14623_252858-2e> |
65 kA 14623_4a46fa-ef> |
2 x M25 14623_074fbd-b7> |
HCS1P 252616 S01271 14623_d12a13-6d> |
2.5 – 4 A 14623_af0185-0c> |
65 kA 14623_82e498-42> |
2 x M25 14623_690882-21> |
HCS1P 252616 S01281 14623_af04c1-ff> |
4 – 6.3 A 14623_29e204-6f> |
16 kA 14623_926241-8b> |
2 x M25 14623_3439b5-c5> |
HCS1P 252616 S01291 14623_30a72a-eb> |
6.3 – 10 A 14623_166d07-14> |
16 kA 14623_ecd405-85> |
2 x M25 14623_7814a2-39> |
HCS1P 252616 S01301 14623_e2a862-4d> |
10 – 16 A 14623_578c7b-88> |
16 kA 14623_250152-31> |
2 x M25 14623_93618b-f5> |
HCS1P 252616 S01311 14623_782226-19> |
16 – 20 A 14623_4a60e4-ce> |
12 kA 14623_3d96b8-de> |
2 x M32 14623_4bc0f4-80> |
HCS1P 252616 S01321 14623_e262ea-1d> |
20 – 25 A 14623_70cdc4-47> |
12 kA 14623_fafbcc-7a> |
2 x M32 14623_a86740-20> |
HCS1P 252616 S01331 14623_ec489c-d6> |
- Last digit of the order number:
- 1 – basic version without undervoltage release and auxiliary contacts
- 2 – undervoltage trip
- 3 – auxiliary contacts 1N0 + 1 NC
- 4 – undervoltage release and auxiliary contacts 1N0 + 1 NC
Undervoltage trip (U)
As an option, motor circuit breakers intended for use in hazardous areas can be fitted with an undervoltage trip, the purpose of which is to automatically switch off the device if the supply voltage falls below a safe level. This protects both the motor itself and other plant components from the effects of unstable power supply conditions. Importantly, the switch prevents the motor from restarting automatically when the voltage returns, which is important for safety in Ex zones.
Trip characteristics for overloads
The graph shows the dependence of the tripping time on the current value (expressed as a multiple of the rated current In) at an ambient temperature of 30°C. This characteristic provides an effective response for both light and heavy overloads:

for high overloads (e.g. 8-10 ×In) – in milliseconds,

for low overloads (1.2-2 ×In), the response occurs after a few minutes or so.

Motor circuit breakers for explosive atmospheres
HARDO motor circuit breakers of the HCS1P series are designed for operation in potentially explosive atmospheres, in zones 1, 2, 21 and 22. Their primary type of protection in the context of explosion safety is Ex e protection (i.e. reinforced construction). In addition, Ex HARDO motor circuit breakers have overload protection and can be equipped with undercurrent protection and auxiliary contacts (1NO + 1NC)
The Ex HCS1P motor circuit breakers are characterised by their high rated switching and breaking capacity – up to 65 kA, which ensures effective operation even in installations with high short-circuit energy. For motor control in category AC3, the device can handle loads up to 440 V / 25 A.
Operating principle based on the wiring diagram
The diagram shows the basic connections of the main circuits (L1, L2, L3 – T1, T2, T3), the undervoltage trip control circuit and the auxiliary contacts (13-14 and 21-22). When voltage is applied and the circuit is activated, the motor is switched on. In the event of an overload or voltage drop, the trip mechanism disconnects the power supply. The operating contact category is AC-3
The main terminals are suitable for conductors with a cross-section of 1 to 10 mm² (or 6-10 mm² when using collets), allowing flexible adaptation to different installations.

Auxiliary contacts 1NO + 1NC
Ex motor circuit breakers may include auxiliary contacts (one NO and one NC) which are independent of the main tracks and can be used for:

transmission of the circuit-breaker operating status signal to a higher-level system (e.g. PLC),

activation of optical or audible signalling,

blocking the start-up of other devices in the system.
The category of auxiliary contacts is AC15 (1 A/230 V). The terminals for the auxiliary contacts allow the connection of wires with a cross-section of 1 to 2.5 mm².
Switch housing: robustness and safety
The motor circuit breaker housing for hazardous areas is made of unsaturated polyester resin. Reinforced with glass fibre and mineral fillers, the housing does not melt, drip, or emit excessive smoke in the event of a fire. The product does not contain halogens, heavy metals or any substances listed on the REACH SVHC list.
The housing provides high mechanical and chemical resistance.
The outer casing material has additives to reduce electrification, which negates the risk of ignition of explosive atmospheres due to electrostatic discharge.
ATEX Directive requirements for motor connectors
Electric motors used in potentially explosive atmospheres require special protection against overloads and short circuits, as required by the ATEX Directive (2014/34/EU) and the IEC 60079-14 and EN 60079-0 standards.
Hazards affecting motors
Overloads and short circuits can lead to excessive heating of the motor windings, damage to the insulation, as well as arcing and sparking. In the presence of explosive mixtures (gases, flammable liquid vapours or dust), this can lead to an ignition of an explosive atmosphere.
How to select equipment
Any electrical equipment operating in a hazardous area must be designed, selected and installed taking into account the specific requirements resulting from the Ex-zone classification and the equipment category.
Motor switch as the final control element in the drive system
The entire drive system must comply with the temperature class requirements (e.g. T3, T4) and be appropriately sized for the type of zone (0, 1, 2 for gases or 20, 21, 22 for dusts) and explosion group.
Reducing the risk of ignition
These protection measures effectively reduce ignition risk, ensuring safe, reliable, and compliant operation of electric drives in explosive atmospheres.