SELCO
DENMARK
For more than four decades, SELCO has developed, manufactured, and supplied advanced electronic equipment for: Power Generation and Control, Engine Control and Protection, Process Alarm Monitoring, Engine Diagnostics.
Their products are designed and built for harsh and demanding environments, both on land and at sea. SELCO equipment is trusted wherever reliability, precision, and long service life are essential — from industrial power plants to marine and offshore installations.
Rooted in Danish engineering tradition, their Research & Development team continuously improves and expands the SELCO product range using the latest design and testing.
PRODUCT CATEGORIES
SELCO alarm monitoring panels are modular electronic control units designed specifically for the local or remote monitoring of dry contact signals in marine, offshore, and industrial power applications. The M1000 model, which forms the foundation of these systems, delivers reliable performance with an IP56 protection rating, featuring 10 normally open or normally closed (NO/NC) input channels, first-out alarm identification, an internal siren relay, and RS485 Modbus-RTU connectivity. The M1000 Plus, the current version in the series, builds upon these features by adding an integrated web server, an Ethernet (Modbus TCP) port, an internal alarm log, and easy configuration via USB. While the M3000 model—designed for more advanced analog monitoring needs—stands out with support for 24 channels, 48 programmable alarm levels, and a dual-line LCD display, the compact M4200 model offers 8 programmable LED channels available in red, green, and yellow for use in demanding environments. On the indication and annunciation side, the system includes the M4500, M4600, and M4700 panels—available in 6, 8, or 20-channel configurations—featuring front-panel test buttons and strip labeling for potential-free contacts; the M4780 version of this series further enables remote resetting and status monitoring from control rooms or ship bridges via Modbus support.
SELCO engine and generator controllers are advanced control systems manufactured to marine standards and designed to operate under the most demanding industrial conditions. Models such as the M2500 Engine Controller and the M2000—which form the core of these systems—manage auxiliary and propulsion engines through features including graphical display support, CAN J1939 bus communication, automatic start/stop logic, and comprehensive fault logging. The M2100 unit, developed for emergency scenarios, continuously monitors mains power to ensure the automatic activation of backup generators (AMF) in the event of a main power failure. Standing out in power management and synchronization, the C6200 FlexGen and modular SIGMA systems handle critical tasks such as 3-phase true RMS measurement, automatic synchronization, active/reactive load sharing, and dead-bus monitoring. Equipped with internal electrical protection algorithms—covering reverse power, loss of excitation, overcurrent, short circuit, and high/low frequency—these systems ensure the highest level of operational safety for both the generators and the connected facility or shipboard networks.
SELCO protection and control relays are high-tech electronic devices designed to ensure safe energy management, generator control, and system monitoring in both marine and land-based power networks. The brand's product range is divided into two main categories: the T-series, which holds specific certifications for harsh marine environments, and the G-series, which offers cost-effective solutions for land-based facilities. Prominent in marine applications, T-series relays (such as the T2200, T2400, and T2500) protect generators against electrical faults like overcurrent and short circuits, while models such as the T3100 and T3200 continuously monitor grid voltage fluctuations and insulation levels. The G-series, developed for land-based industrial facilities, includes models like the G2000—which monitors reverse or forward power flow in generators—the G2200 with integrated current transformers, and the G3300, which checks for phase faults and voltage symmetry. Additionally, SELCO manufactures specialized arc flash protection relays that detect light bursts within milliseconds and trip circuit breakers to prevent explosions and equipment damage in electrical panels.
SELCO power management controllers are advanced electronic systems designed for the safe, stable, and efficient operation of generators in the marine and industrial sectors. The system comprises robust product families such as the SIGMA series (S6610/S6100)—notable for its modular structure—the FlexGen series (C6200), which offers advanced load sharing, and the M2100 emergency controllers designed for critical situations. Featuring fully automatic, semi-automatic, and manual operating modes, these controllers effectively manage automatic generator start/stop operations, grid synchronization, active and reactive load sharing, and rapid system recovery following blackouts. SELCO systems provide high-level protection against electrical faults—such as reverse power, overload, short circuits, and loss of excitation—and feature rugged housings built to withstand harsh marine and field conditions, alongside clear LED displays.
