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PRODUCTS INDUSTRIES SERVICE CAREER
INDUSTRIES Elevator Technology Elevator- and safety functions Electronic Speed Limiter

Safety rescaled - with digital overspeed governor and intelligent safety gear management

Digital safety gear architecture for modern elevator systems. Replaces braking device and mechanical overspeed governor.

Mechanics were standard for a long time - now they are becoming a weak point Mechanical braking devices and overspeed governors are still in use in many existing systems. However, new safety requirements and modernization cycles make it clear that these components are not only maintenance-intensive - they are also no longer fit for the future.

Our solution replaces mechanical elements with digital modules that function independently of the control system and can be seamlessly integrated into existing safety architectures. The result: more safety, less complexity - and a clear step towards a standard-compliant future.

Safety rescaled - with digital overspeed governor and intelligent safety gear management

Digital safety gear architecture for modern elevator systems. Replaces braking device and mechanical overspeed governor.

Mechanics were standard for a long time - now they are becoming a weak point Mechanical braking devices and overspeed governors are still in use in many existing systems. However, new safety requirements and modernization cycles make it clear that these components are not only maintenance-intensive - they are also no longer fit for the future.

Our solution replaces mechanical elements with digital modules that function independently of the control system and can be seamlessly integrated into existing safety architectures. The result: more safety, less complexity - and a clear step towards a standard-compliant future.

Elevator and safety functions – reliably realized digitally

From the digital overspeed governor to evaluation and intelligent catch triggering, the result is a system that not only complies with current standards, but also flexibly meets future requirements

Self-sufficient system Control-independent A
Self-sufficient system Control-independent

Self-sufficient system that can be used as a retrofit kit for modernizing old (and modern) control systems.

Overspeed triggering ESG C
Overspeed triggering ESG

Elimination of the mechanical overspeed governor: In the event of overspeed, the safety circuit is opened or the electromechanical safety gear is triggered directly by the PSU03 / SGT03.

Shelter maintenance in shield mode D
Shelter maintenance in shield mode

When entering the shaft with a reduced shaft head/pit in accordance with EN 81-21, the maintenance shield mode is activated via the door release. A protective space is created to allow maintenance personnel to work safely.

Shelters Mounting Shield Mode E
Shelters Mounting Shield Mode

Shield mode installation ensures a protected space for personnel even before the elevator is put into operation. During installation, such as rail fastening, a protective space is created sequentially according to the installation progress. Depending on the position, the cabin is secured with a tolerance of ± 5 cm.

When mechanics are no longer enough

New TÜV regulations and stricter safety standards present elevator operators with a clear decision: Continue with outdated technology - or take the step into the digital future with Kübler LES03 / SGT03.

Function 1) Standard notes SIL LES03 / PSU03
Safe positioning system with safety catch release		 LES03 / PSU03
Safe positioning system		 LES03 / SGT03
Safety catch release		 LES03 / SGT03
Safety catch release with limit switch and
interlock control
A Self-sufficient system (independent of the elevator control system) No standard reference - ✔ ✔ ✔ ✔
B UCM (Unintentional car movement) EN 81-20: 5.6.7.7 2 ✔ ✔ - -
C Release of safety catch at overspeed EN 81-20: 5.6.2.2.1 a), 5.6.6.10 3 ✔ - ✔ ✔
Monitoring status of safety gear EN 81-20: 5.6.2.1.5 1 ✔ - ✔ ✔
Reset function of the electromechanical safety gear No standard reference 3 ✔ - ✔ ✔
Release of safety catch when car moves upwards EN 81-20: 5.6.6.5 2 ✔ - ✔ ✔
Safety catch triggered by emergency brake switch No standard reference 3 ✔ - ✔ ✔
Safety catch switch that opens the safety circuit EN 81-20: 5.6.2.1.5, 5.6.6.5
EN 81-21: 5.5.2.3.3 f), 5.7.2.3.3 f)		 1
2		 ✔ - ✔ ✔
Monitoring of the electrical reset device EN 81-21: 5.5.3.2, 5.5.3.3 c), 5.7.3.2, 5.7.3.3 c) 2 ✔ - ✔ ✔
Shield mode: Safety release with reduced shaft head/pit to create a personal protection space EN 81-21: 5.5.2.3.1, 5.7.2.3.1 2 ✔ - ✔ ✔
D Shield mode: Creation of protective space during scaffold-free assembly No standard reference 3 ✔ - ✔ ✔
E Absolute position feedback No standard reference 1 ✔ ✔ ✔ ✔
F Emergency limit switch EN 81-20: 5.12.2.3.1 b) 1 ✔ ✔ - ✔
Inspection limit switch with reduced shaft head/pit EN 81-21: 5.5.3.4, 5.7.3.4 2 ✔ - ✔ ✔
Functional safety right from wiring (without presetting) No standard reference 3 ✔ - ✔ ✔
Delay control (with shortened buffer stroke) EN 81-20: 5.12.1.3 3 ✔ ✔ - ✔
Pre-tripping overspeed 115 % (pretripping) EN 81-20: 5.6.2.2.1.6 a) 2 ✔ ✔ ✔ ✔
Monitoring the speed in inspection mode (0.63 m/s) EN 81-20: 5.12.1.5.1 e) - ✔ ✔ ✔ ✔
Secure configuration management for accelerated approvals No standard reference - ✔ ✔ ✔ ✔
Monitoring access to the car roof or shaft pit EN 81-21: 5.5.3.1, 5.7.3.1 3 ✔ ✔ ✔ ✔
Door bridging EN 81-20: 5.12.1.4 a), b), c), 2), d) 2 ✔ ✔ - -
Door zone signaling for emergency release in 12 V emergency power mode No standard reference - ✔ ✔ - -
Buffer batteries for emergency release with power supply unit for ESG no standard reference ✔ - ✔ -

Mechanics were yesterday - today digitalization begins with electronic overspeed governors

With intelligent safety gear management - The following components form the core of our solution: they replace the mechanical braking device and mechanical overspeed governor with intelligent, standard-compliant modules. All other safety functions remain the same. For comprehensive modernizations - each unit is designed to maximize reliability and installation comfort.

Compatible with all electromechanical safety gears from Cobianchi, Dynatech and Wittur.

SIL3 certified sensor for position and speed detection.
SIL3 certified sensor for position and speed detection.
To the LES03
Ensures standard-compliant, fast installation - even for retrofit projects.
Ensures standard-compliant, fast installation - even for retrofit projects.
To the mounting kit
Direct triggering of the electromechanical safety gear.
Direct triggering of the electromechanical safety gear.
To the SGT03

Preconfigured. Pre-wired. Thought ahead.

SGT03 including backup batteries and power supply unit

When it comes to safety-critical systems, it is not only the quality of the components that counts - but also how efficiently they can be integrated into existing systems. This is exactly where our MODBOX comes in: As a pre-assembled unit with pre-installed and pre-wired solutions, it reduces installation times, avoids interface errors and creates clarity in the project process.

MODBOX is an option of the Kübler SGT03

Further concepts for our elevator solutions

Implementation of elevator and safety functions with intelligent safety gear management

Learn more

Realization of elevator and safety functions without intelligent safety gear management

Learn more

19.02.2026
∼ 2.872 MB
Brochures Shaft copying systems

Safe shaft copying systems

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                    Brochures Shaft copying systems 
                
                

	                Shaft copying systems - Sensors                

                	                                        

        

    

    

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