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Innovation with quality – Gruner relays
Latching relays from Gruner are individually developed solutions that set global standards and are frequently specified by the industry. Gruner is the pioneer for relays in energy management applications. ’Switch to innovations’ is our motto for delivering relays to the market and applications. Our mission is to push the boundaries of what is possible and provide customized solutions that meet your requirements.
Gruner Contactor RelaysAutomotive isolating relays for 12 V to 48 V vehicle electrical systems
Whether for proven 12-volt vehicle electrical systems or modern 48-volt architectures, Gruner offers reliable and compact relay solutions for a wide range of applications in vehicles. Our relays guarantee safe power transmission and high switching performance with reduced energy consumption, and offer maximum service life and switching reliability.
The 753 and 760 relays serve as isolating elements in the 12 V vehicle electrical system and ensure reliable galvanic isolation.
With a current carrying capacity of up to 250 A, type 753 offers a cost-effective solution for preventing battery discharge during long transport or downtimes.
Type 760 is specially designed for modern Li-ion battery systems and, with a current carrying capacity of up to 250 A and integrated contact monitoring, enables safe battery shutdown, e.g., after an impact.
Both relays feature a compact design, high shock resistance, and low holding power.
The 48V relays type 850 and 852 are ideal for battery and energy management in mild hybrid vehicles (MHEV), while our 12V and 24V relays are proven solutions for classic automotive applications.
High-voltage relays 450 volts / 850 volts for BEV and PHEVMain relay, bank relay, and charging relay
Gruner develops customized relay solutions for electric vehicles (BEV) and plug-in hybrid vehicles (PHEV). Our relays are characterized by high short-circuit resistance, high continuous current carrying capacity, compact design, and high shock resistance. Our latest relay developments:
- Relay type 860: Bank relay for 800 V systems in electric vehicles, continuous current 250 A, max. 16,000 A for short periods, extremely robust, high shock resistance (120 g / 20 ms) and low holding power
- Relay type 870: Main relay for 400 V PHEV systems, continuous current 100 A, max. 600 A cut-off current at 380 VDC and low holding power
In addition, we implement customer-specific high-voltage relay solutions – perfectly tailored to your specific requirements. Contact us!
Relays for micromobility
For e-bikes, e-scooters, light electric vehicles (LEVs), electric three-wheelers, and other micromobility solutions, Gruner offers compact relays with high switching reliability, low energy consumption, and a robust design. Among other things, they enable efficient management of charging and drive systems as well as safety functions in the system.
Our relay type 852 is perfectly suited for electric three-wheelers (E3Ws):
- The second generation of disconnect switches for 48-volt technology is perfectly tailored to battery management in battery-powered vehicles
- It offers higher power capacity up to 250 A and optionally integrates controllable electronics, as well as the option of contact position and temperature monitoring
- The 852 relay is an efficient and cost-effective alternative to semiconductor circuits
The relay type 854 is also a powerful solution for the micromobility sector, especially for Li-ion battery systems up to 120 VDC:
- Continuous current carrying capacity of 120 A
- Enables contact position monitoring and optional temperature monitoring via NTC sensor
- Overcurrent resistance up to 5 kA (10 ms) – ideal for demanding applications in electric two- and three-wheelers
Power distribution center for 12 V and 48 V system architectures and electric and hybrid vehicles
Power distribution centers perform the central switching functions for vehicle electronics. We produce modular power distribution centers for relays and fuses.
The high flexibility of our product range allows us to offer customized solutions for a wide variety of vehicle platforms.
Relays for AC charging stations, wallboxes, and mobile charging units
Our relays are the ideal choice for bidirectional AC charging stations/wallboxes.
The Gruner relay type 802, for example, meets the requirements of IEC 62955 and, as a mechanically coupled 4-pole isolating relay, offers maximum safety and reliability for AC charging up to 22 kW.
The compact Gruner relay type 801 is also ideal for Mode 2 and Mode 3 charging applications. It meets all relevant standards of IEC 62955 and IEC 62752, making it ideal for use in mobile charging units (Mode 2) and permanently installed wallboxes (Mode 3).
With this product range, Gruner supports AC charging solutions from mobile use to stationary infrastructure — with high switching reliability, compact design, and long-term reliability.
Reliable relay solutions for energy storage, backup systems, and microgrids
Gruner offers high-performance relays for stationary energy storage, PV systems, and microgrid applications. Our solutions ensure safe switching, efficient load management, and high system availability—both in private and commercial applications.
Relay type 743 – Versatile use in storage and microgrid systems:
- Current conductivity up to 200 A, 2-pole, UL-approved
- With microswitch for feedback of the switching status
- Additional manual operation
- Special version for optimal integration into meter collar adapters as a backup switch or islanding switch
- Customized adaptations possible for optimal integration into customer applications
The Type 743 relay is ideal for microgrid interconnect devices. It enables flexible switching between the grid and backup power sources, e.g., emergency power generators or home storage solutions.
Our relay solutions are ideally suited for integration into modular and scalable storage and microgrid systems, thereby supporting the development of a secure and decentralized energy supply.
Relays for soft starters and industrial motor controls
Gruner relays are a key component in soft starters. They enable motors to be started and stopped smoothly, thereby contributing to improved energy efficiency and extended drive service life. High switching capacity, short response times, and a compact design make Gruner relays the ideal choice for modern automation solutions.
One example is the relay type 716, which is ideal for industrial applications:
- Bistable switching technology with rotary armature movement for high shock and vibration resistance
- Rated switching current up to 80 A and maximum switching capacity of 20,000 VA
- Short response time <15 ms
- Optional manual switching possible
- Compliant with IEC 61810-1
Bistable relays for intelligent energy management, meters, and building automation
Gruner relays set standards in the field of intelligent energy management.
With their outstanding features and modular design principle, the polarized bistable relays of type 726 cover a wide range of energy management functions, such as load control, supply control, prepayment, etc.
- High switching capacity with minimal energy consumption
- High switching reliability with optimized service life
- High reliability with a minimum of mechanical components
- Exceptionally wide range of switching capacities
- Special design to withstand high short-circuit currents
In modern electricity meters, KNX actuators, and load management applications such as lighting control panels or home automation, our relays ensure reliable switching functions with minimal energy consumption and high switching reliability. Our bistable relays combine high contact force with low operating voltage, enabling a long service life and high switching reliability – ideal for the requirements of modern building automation, load control, and energy management solutions.
More about relays from Gruner
Are you looking for relays to get you further ahead? If so, then take a look at our product range. Are you looking for a bespoke solution or for a professional point of contact for your application? Then send us an e-mail.
GRUNER AG
Bürglestr. 15 - 17
78564 Wehingen
Germany
Phone: +49 74 26 / 948-0
Fax: +49 74 26 / 948-200
e-mail: info@gruner.de