IED

What IED does

IED d.o.o. is a privately held Serbian limited liability company, founded in 1999 and headquartered in Belgrade, that designs and manufactures intelligent electronic devices (IEDs) for electric power systems. The product portfolio spans relay protection devices (e.g., FR-02G, RZB-01, KB-12), signal boards (ST-16/24/32/48 and SK-24LRG), DC voltage controllers (KJN-110), switchgear position and regulation indicators (DP-30, PRS-31), high-voltage switchgear simulators (SVRO12-01), power supply modules (MN series, including drop-in replacements for SIEMENS 7TN39/7TN35 and ISKRA NC 300), recording devices (LOGER 2003), and an automatic control system for small hydropower plants (UME 2003 V.RB). Technically the devices are built on conventional industrial-electronics foundations — galvanically isolated optocoupler inputs, relay outputs, mixed-signal conditioning, and PLC/SCADA-style automation logic — with no disclosed AI, software-platform, or cloud components.

The company serves electric power generation and distribution utilities (Elektroprivreda and Elektrodistribucija) and industrial power-system operators primarily in Serbia, with a stated ambition toward the broader European market. IED operates a direct-sales, hardware-led go-to-market with a 1-10 employee headcount and reports cumulative deliveries of 10,000 devices with zero complaints as its primary commercial credential. Revenue is generated through the design, production, sale, servicing, and commissioning of these specialized devices; no pricing, ARR, or revenue figures are publicly disclosed, and there are no recorded funding rounds, acquisitions, or strategic partnerships.

Name

IED

Legal name

IED d.o.o.

Website

https://ied.rs

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

1–10 employees

Short description

IED d.o.o. is a Belgrade-based Serbian electronics manufacturer, founded in 1999, that designs and produces specialized relay protection, signal, voltage-control, and automation devices for electric utilities and industrial power-system operators.

Ownership category

akta.pro rank

Product category

Power System Protection Equipment

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Relay and Industrial Control Manufacturing (335314)

SIC

Switchgear & Switchboard Apparatus (3613), Electrical Industrial Apparatus (3620)

akta.pro primary industry

Protection Relays & Protection IEDs (EUADACAE)

akta.pro secondary industries

Circuit Breakers, Disconnectors, Earthing Switches & Switchgear Components (EUADACAH), Testing, Commissioning, Maintenance & Retrofit/Modernization (Substations/Switchgear) (EUADACAL)

Keywords

• Relay protection devices
• Power system electronics
• Substation automation devices
• Signal boards manufacturing
• Voltage protection relays

Headquarters

HQ city

Belgrade

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, Infrastructure

Revenue model

1. Electronic Device Sales: IED generates revenue through the design, production, and sale of intelligent electronic devices for power systems, including relay protection equipment, signal boards, measurement devices, and control systems. The company also provides related services including service/maintenance and commissioning.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

IED designs and manufactures intelligent electronic devices (IEDs) for control, protection, diagnostics, and measurement in electric power systems. Its product lineup includes relay protection devices, signal boards, DC voltage controllers, earth fault detection relays, battery protection relays, switchgear simulators, automatic reclosing devices, power supply modules, and automatic control systems for hydropower plants. The company also offers commissioning and after-sales service for its equipment and produces drop-in replacements for legacy systems from manufacturers such as SIEMENS and ISKRA.

Product overview

IED designs and manufactures electronic devices for management, protection, diagnostics, and measurement in power systems. The product portfolio includes signal boards (ST series) for sound and optical signaling of digital signals, protection relays (FR, RZB, KB series) for monitoring and controlling power equipment, power supply modules (MN series) for auxiliary voltage distribution, switchgear simulators (SVRO12) for testing, recording devices (LOGER) for signal monitoring, and control systems (UME) for hydropower plant automation. The company offers both standard product lines and specialized devices, including replacements for legacy systems from manufacturers like SIEMENS and ISKRA. All products serve the power utility, distribution, and industrial sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• DRZ-01 Protection relay device for use in power systems.
• ST-48 Signal board for sound and optical signaling of up to 48 digital signals in power systems, with galvanically isolated inputs.
• KJN-110 DC voltage controller that acts on disconnection using energy from alternative sources (e.g., KIU) in case of loss or unauthorized drop of DC command voltage 110Vdc.
• ST32-01 Signal board for sound and optical signaling of 32 digital signals with galvanically isolated inputs.
• ST-16 Signal board for sound and optical signaling of 16 digital signals with galvanically isolated optocoupler inputs.
• ST-24-02 Signal board for sound and optical signaling of 24 digital signals with galvanically isolated inputs.
• FR-02G Relay that permanently controls switch disconnection circuit and signals failures, including loss of auxiliary voltage, breaks in coil or line, and mechanism or contact failures.
• ST-24-01 Signal board for sound and optical signaling of 24 digital signals with galvanically isolated inputs.
• SK-24LRG Signal combination for sound and optical signaling of 24 digital signals with relay outputs and galvanically isolated optocoupler inputs.
• DP-30 Diode switchgear position indicator showing current position (on, off, intermediate) and errors in device operation.
• SVRO12-01 Device for simulating switching states of high-voltage switchgear in power plants for testing control and protection systems, used for factory acceptance tests (FAT), control system testing, and user training.
• RZB-01 Relay for detection of earth faults in DC distributions powered by accumulator batteries, reacting to single and multiple earth faults.
• KB-12 Two-stage undervoltage protection relay for detection of end of charging and protection against excessive discharge of 12V accumulator batteries.
• ST-32 Signal board for sound and optical signaling of 32 digital signals with galvanically isolated optocoupler inputs.
• PRS-31 Indicator of power transformer regulation switch position, replacement for classic resistor-based indicators with higher reliability and additional alarm functions.
• FR-01 Flashing light relay used with signal combinations for optical signaling in plants.
• FR-02 Relay for permanent control of switch disconnection circuit, signaling failures of auxiliary voltage, coil breaks, and mechanism issues.
• SR-01 Signal relay for optical signaling and memory of operation of protection and other devices with relay output.
• KK-300 Relay for continuous monitoring of capacitor auxiliary devices (KPU), enabling parallel operation of multiple CPUs with immediate failure signaling.
• RSK-8 Relay signal combination for sound and optical signaling of malfunctions and status changes, with bistable memory for 8 signals.
• AZP-01 Device for controlling earth fault switch, intended for elimination of transient earth faults.
• UME 2003 V.RB System for automatic control of low-power storage hydropower plant with associated software.
• MN-7TN39A Power supply module with 110V=/220V= input and +24V=/±15V= output, 60W, drop-in replacement for SIEMENS 7TN39.
• MN-7TN35A Power supply module with 110V=/220V= input and ±24V=/±15V= output, 60W, drop-in replacement for SIEMENS 7TN35.
• MN-100 Power supply module for powering consumers intended for auxiliary voltage 110V= and 220V=.
• RNC-300 Improved version of the NC 300 device manufactured by ISKRA, with only the casing remaining unchanged.
• RU 56T Device for three-pole automatic reconnection, designed as a complete functional and physical replacement for RU 56.
• APU 570 Device for three-pole automatic reclosing of switch intended for use in medium-voltage applications.
• DT-100 Instrument intended for precise time measurement in substations and industrial environments.
• VR-01 Relay made in plastic housing intended for rail mounting.
• B1-B2 Six-digit counters without reset capability, designed for excitation voltage of 110V=.
• LOGER 2003 V. 8/32 Device for recording 8 analog and 32 digital signals for monitoring and diagnostics in power systems.
• Service (Servis) and Commissioning (Puštanje u rad) After-sales service, maintenance, and on-site commissioning of IED-manufactured power system devices for electric utility and industrial customers.

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• ABB: Global leader in power and automation technologies with a broad portfolio of protection relays, IEDs, and substation automation systems. Directly comparable to IED's relay protection and measurement product lines, but operates at vastly greater scale across all global utility markets.
• Siemens: Major OEM of substation protection, control, and power supply modules (including 7TN35/7TN39 series, which IED directly replaces). Highly comparable in relay protection and substation auxiliary equipment, though vastly larger and globally distributed.
• Eaton: Diversified power management company offering protection relays and substation control products through its electrical business. Comparable to IED in the protection and measurement device category, but operates across a much wider electrical product portfolio.
• Toshiba Energy Systems: Provides protection relays, substation automation systems, and grid solutions as part of its broader power systems portfolio. Overlaps with IED in protection and control product categories, though Toshiba operates as a much larger diversified energy equipment supplier.
• Schneider Electric: Global provider of protection relays, substation automation, and power management solutions through its EcoStruxure and Sepam lines. Overlaps with IED's protection and measurement products but serves a much broader customer base worldwide.
• GE Vernova (Grid Solutions): GE's grid business producing protection and control IEDs, substation automation systems, and grid modernization solutions. Directly comparable in product category to IED, but operates globally with utility-scale tender capability.

Direct peers

• Arteche: Spanish company manufacturing auxiliary relays, protection and control equipment, and measurement instruments for electric power systems. Comparable to IED in the auxiliary/protection relay and signal/indication device categories for utility substations.
• Schweitzer Engineering Laboratories (SEL): US-based specialist manufacturer of protection relays, automation controllers, and IEDs for electric power systems. Closest functional peer to IED, with similarly focused protection-relay product lines targeted at utility and industrial customers.
• Iskra: Slovenian-based manufacturer of relays, protection devices, and power engineering equipment with strong Balkan/European presence. Highly comparable as a regional relay and protection specialist; IED explicitly manufactures replacements for legacy Iskra products (e.g., RNC-300 for Iskra NC 300).
• ZIV Grid Automation: Spanish-based specialist in protection relays, IEDs, and substation automation with strong European utility footprint. Closely comparable niche specialist peer to IED in relay protection and measurement devices for power systems.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

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 IED