What Electro-Mechanics EM does

Elektro-Mechanik EM GmbH (EMG) is a privately held German Mittelstand manufacturer founded in 1980 and headquartered in Velbert, North Rhine-Westphalia. The company specializes in design, production, and sale of short-circuit indicators, earth-fault indicators, voltage indicators, and associated sensors for medium-voltage power distribution networks (5-36 kV). Its portfolio spans underground cable networks (K/KM/KH, MF, OK, EASI, EFL, TERRA-C, EK/EKL/EKS, NG, MD, SGI series), overhead line networks (FLA4), and accessories including split-core sensors (LK, SK, LE, SE), external blinking lamps (BL4, BL6, BL7), and remote indication systems (RIS-FM for SMS, RIS-FS2 for RS485 Modbus/SCADA integration). Products are self-powered (current transformer, line energy harvesting, or supercapacitors) and configured for radial, ring, solidly earthed, resistance earthed, isolated, and compensated networks.

The company sells directly to electric utilities and distribution companies, switchgear manufacturers (who integrate indicators into their equipment), and private industrial operators with medium-voltage infrastructure. Products are developed in close cooperation with customers to meet specific network requirements. The company serves customers in more than 30 countries worldwide. GTM is sales-led with direct engagement; marketing relies on the company website (emg-ger.com), detailed product datasheets, and technical documentation. The company is ISO 9001:2015 certified (audit confirmed in 2024) and is controlled by the Kusserow family, with Dirk, Wolf, and Berthold Kusserow serving as Managing Directors. No external investment, no public revenue disclosure, and no M&A activity are reported.

Name

Electro-Mechanics EM

Legal name

Elektro-Mechanik EM GmbH

Website

https://emg-ger.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

Elektro-Mechanik EM GmbH (EMG) develops, manufactures, and sells short-circuit indicators, earth-fault indicators, and voltage indicators for medium-voltage power distribution networks (5-36 kV), serving utilities, switchgear manufacturers, and industrial operators in 30+ countries.

Ownership category

akta.pro rank

Product category

Medium Voltage Fault Detection Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Electrical Equipment Manufacturing (33531)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Non-Destructive Testing (NDT) & Diagnostics (IR/UV, PD, vibration, acoustic) (EUADAJAE)

akta.pro secondary industries

Power Quality, Metering & Monitoring (HDACAJAG), Circuit Breakers, Disconnectors, Earthing Switches & Switchgear Components (EUADACAH)

Keywords

• Fault detection indicators
• Medium voltage monitoring
• Short-circuit indicators
• Earth-fault detection
• Voltage monitoring equipment

Headquarters

HQ city

Velbert

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Hardware Product Sales: Sale of proprietary fault detection equipment including short-circuit indicators, earth-fault indicators, voltage indicators, sensors, overhead line indicators, and accessories. Products are sold directly to utilities, distribution companies, private industries, and switchgear manufacturers worldwide.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Elektro-Mechanik EM GmbH develops, manufactures, and sells short-circuit indicators, earth-fault indicators, voltage indicators, sensors, and remote indication systems used by utilities, distribution companies, switchgear manufacturers, and private industries to detect and locate faults in 5–36 kV medium voltage power distribution networks. Products include overhead line indicators (FLA4), directional indicators (SGI), combined fault indicators, split-core sensors, and accessories such as Modbus/SMS remote interfaces.

Product overview

Elektro-Mechanik EM GmbH (EMG) is a manufacturer of protection and monitoring equipment for medium voltage power distribution networks (5–36 kV). The product portfolio is organized into five interconnected categories: (1) Short-circuit indicators (K/KM/KH, MF, OK series) using self-powered or sensor-based current threshold detection with flag or LED display; (2) Earth-fault indicators (EASI, EASI-L, EFL, TERRA-C series) with various sensor types and display options; (3) Combined earth-fault and short-circuit indicators (EK/EKL/EKS, NG, MD, SGI series) with MD and SGI offering advanced features including LCD/OLED displays, Modbus interfaces, and data logging; (4) Sensors (LK, SK, LE, SE) for both short-circuit and earth-fault detection on shielded or unshielded cables; (5) Overhead line fault indicators (FLA4) with bidirectional radio and di/dt detection algorithms; and (6) Accessories including remote indication systems (RIS-FM with SMS, RIS-FS2/RS485 Modbus), voltage indicators (B/BR/BP/BF/BFP, SPA), and external blinking lamps (BL4, BL6, BL7). All products are designed for utility distribution companies and switchgear manufacturers.

Differentiator

Problem solved

Functional benefit

Products and services

• Short-Circuit Indicators (K/KM/KH, MF, OK Series) Self-powered short-circuit indicators for radial and open ring medium voltage networks. Detect faults via current threshold and display via bistable flag indicators or LEDs. Types K/KM/KH use integral split-core steel bands on unshielded cables; MF uses separate LK or SK sensors; OK provides LED or flag display with light-guide or copper cable sensor connection. Sold to utilities and switchgear manufacturers.
• Earth-Fault Indicators (EASI, EASI-L, EFL, TERRA-C Series) Earth-fault indicators for radial and open ring medium voltage networks in solidly or low-resistance earthed systems. EASI/EASI-L use SE or LE sensors (copper cable or fibre optic) with LED/clapper display; EFL offers basic/SCADA/plus variants with fixed or adjustable trip values; TERRA-C uses supercapacitors charged from supply transformer or 230V AC.
• Earth-Fault and Short-Circuit Indicators (EK/EKL/EKS, NG, MD, SGI Series) Combined fault indicators for underground cable networks, available in multiple series. EK/EKL/EKS series (with LK/SK and LE/SE sensors) supports up to three relays; NG series offers compact low-depth housing at lower cost; MD series adds LCD display and Modbus serial interface; SGI series provides directional fault indication with OLED display, microSD data logging, and RS485 Modbus integration for SCADA.
• Sensors (LK, SK, LE, SE) Split-core short-circuit sensors (LK: fibre optic, SK: copper cable) and earth-fault sensors (LE: fibre optic, SE: copper cable) for clamp-on installation on shielded or unshielded cables and busbars. LK offers seven fixed trip values (200–1200A); LE offers seven values (10–100A); SE and SK have adjustable values set at the indicator device.
• Overhead Line Fault Indicators (FLA4) Overhead line fault indicator for medium voltage networks with short-circuit detection (fixed or auto-mode threshold) and di/dt earth-fault detection. Features bidirectional short-range radio for configuration via HS handset, internal 100-entry event log with RTC, voltage detection with two thresholds, and data logging via RIS-FS interface. LED indication with 360-degree focusing lens.
• Remote Indication System RIS-FM Remote indication system for FLA4 overhead line indicators, transmitting fault and network event data as SMS to up to 5 recipients via integrated GSM. Powered by supercapacitors harvesting energy from the monitored line and optional LiSOCl2 batteries. Configurable via HS2 remote control with SD card for SIM PIN and recipient data storage.
• Remote Indication Interface RIS-FS2 Bidirectional remote indication interface between FLA4 overhead line indicators and RTU via RS485 Modbus protocol. Collects fault, network event, load current, voltage status, temperature, and configuration data via short-range radio. Housed in DIN rail enclosure with firmware-updatable SD card reader, test/reset buttons, and 6–48V DC power supply. Also available as retrofittable circuit board.
• Remote Indication Interfaces RIS-FS and RIS-FR Remote indication interfaces for the FLA3.1 product line: RIS-FS provides TTL/RS232/RS485 serial interface with Modbus RTU or ASCII protocol for full remote configuration; RIS-FR provides 9 potential-free relay contacts for connecting up to 9 FLA3.1 indicators to existing cable or GSM remote indication systems.
• Voltage Indicators (B/BR/BP/BF/BFP and SPA Series) Voltage indicators for medium voltage networks (5–36 kV) with rated voltage levels from 5–9 kV to 30–36 kV. B/BR/BP/BF/BFP series uses neon flashing lamp for indoor use with direct or fibre-optic display connection. SPA series uses LED indication with fibre optic (SPA-L) or direct connection (SPA-S), auxiliary power supply, and up to three remote indication contacts.
• External Blinking Lamps (BL4.1, BL4.2, BL6, BL7) External blinking lamps for outdoor fault indication. BL4.1 powered by display unit (maintenance-free); BL4.2 uses replaceable 3.6V lithium battery with auto-sensing for permanent or wipe relay contacts. BL6 encased in M10x40mm vandal-resistant screw. BL7 features two red and two green LEDs for directional fault indication, with solid polycarbonate resin-filled housing (IP65 equivalent) and 35-degree LED beam angle.

Quantifiable outcome

• Products deployed in over 30 countries worldwide

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability1 record

Feature5 records

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Market position

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/emg-elektro-mechanik-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Electro-Mechanics EM