TOMZN Din Rail Single Phase Weekly Programmable Digital Time Switch AC 220V 230V 16A
7-day microsecond multi-event cycle relay for automated off-peak EV shifting, solar heat pumps, and dual-tariff smart panel synchronization.
Product Portfolio
Precision Voltage Protection & Modular Control Switchgear
Engineered for Flanders, Wallonia, and Brussels-Capital low-voltage switchboards, featuring real-time microprocessor metering, customizable delay triggers, and European modular DIN-rail dimensions.
TOMZN Bluetooth Smart Timer Switch 85-265VAC EasyCon Loop Timing Control
App-configured modular time coordinator for Belgian residential thermal storage systems, domestic hot water preheating, and peak shaving automation.
TOMZN TOS7-B Bluetooth DIN Rail Timer Switch 40A 63A EasyCon Smart System
High-amperage modular automation controller engineered for tertiary sub-panels, multi-unit heat pumps, and industrial lighting circuits.
TOMZN 1NO 1NC DIN Rail Weekly Programmable Digital Micro-Relay 16A AC 230V
Dual-circuit programmable relay tailored for interlocked ventilation loops, industrial automation signaling, and cyclic emergency loads.
TOS6-40 Bluetooth Hybrid Time Control Switch 35mm DIN Rail 40A AC 85-265V
Compact heavy-load control module for retrofit enclosures, offering smart mobile scheduling without supplementary contactors for 40A loads.
TORT7 Series 10-in-1 Delay-ON/OFF Multi-function Time Relay 0.1S-10D Interval
Multi-mode microprocessor relay preventing compressor re-strike damage and managing delayed star-delta motors on 230V/400V grid topologies.
Adjustable Over & Under Voltage Self-Recovery Protector 63A/80A with Metering
Flagship protector offering fine threshold customization (140V-300V), instantaneous overcurrent cutoff, and auto-reset delays for Belgian prosumers.
Three-Phase 3P+N Modular Over & Under Voltage Phase Sequence Protective Relay
Commercial grade 400V network supervisory relay safeguarding three-phase heat pumps, EV chargers, and solar converters against neutral loss and phase asymmetry.
Engineering Whitepaper
Over/Under Voltage Dynamics in the Belgian Grid Architecture
A technical assessment of voltage stability challenges across Flanders, Wallonia, and Brussels under high renewable penetration and the revised RGIE / AREI compliance framework.
1. Grid Decoupling Challenges & Voltage Rise (Overvoltage) in Flanders & Wallonia
The Belgian low-voltage distribution architecture is undergoing systemic stress stemming from decentralized residential solar photovoltaic (PV) generation. Historically designed for unidirectional power flow from high-voltage transmission lines (managed by Elia) down through medium-voltage substations to distribution systems (operated by Fluvius, ORES, RESA, and Sibelga), distribution feeders frequently experience reverse power injection on sunny days. Under the European CENELEC EN 50160 power quality standard, nominal voltage is 230V phase-to-neutral (400V phase-to-phase) with an allowable margin of ±10% (207V to 253V).
However, when dense rooftop PV arrays inject active power (P) through high-impedance low-voltage overhead lines common in suburban Flanders and Wallonia, local terminal line voltage frequently exceeds 253V. Synergrid technical guidelines mandate that residential solar inverters decouple when feeder voltage reaches 264.5V for 200 milliseconds, or when the 10-minute average voltage exceeds 253V. This creates recurring inverter tripping loops. A bidirectional modular over-and-under voltage protector installed at the incoming switchboard provides critical downstream protection, isolating sensitive consumer appliances from sustained swell hazards (255V-275V) while allowing programmable reconnection delays (10s to 300s) to avert synchronous reclosing transients.
RGIE / AREI Technical Correlation: Under Belgium’s Règlement Général sur les Installations Électriques (RGIE / AREI - Book 1, Chapter 4.4), electrical installations must incorporate protective devices against temporary overvoltages (TOVs) and brownout sag events to eliminate overheating risks in electro-mechanical motor windings and sensitive switch-mode power supplies (SMPS).
2. Legacy 3x230V Delta Grids vs. Modern 3x400V+N Wye Infrastructure
A distinctive complexity of the Belgian electrification landscape is the persistence of legacy 3x230V Delta networks without a distributed neutral conductor. Particularly in older sectors of Brussels-Capital, parts of Antwerp, and select Walloon municipalities, single-phase 230V power is delivered across two line conductors (Phase-to-Phase) rather than Phase-to-Neutral. Installing standard single-phase protection switchgear built for line-to-neutral monitoring in a line-to-line system requires dual-pole isolation switchgear capable of simultaneously breaking both live potentials.
Zhejiang TMB Electric engineers customized internal sensing algorithms and 2-pole galvanic break mechanisms. In contrast to single-pole switched neutral protectors that leave one conductor live during fault conditions, our 2P auto-reclosing DIN-rail protectors isolate both live poles simultaneously, eliminating residual potential hazards and satisfying Vinçotte and BTV inspection criteria during mandatory AREI conformity certifications.
3. Capacity Tariff (Capaciteitstarief) & Load Shifting Automation
With the introduction of the capacity tariff in Flanders by the VREG regulatory agency, electricity billing is pegged to 15-minute monthly peak demands (measured in kW) recorded by Fluvius digital meters. Voltage dips, micro-outages, and subsequent uncoordinated reclosing of high-load machinery (heat pumps, EV charging stations, HVAC chillers) produce massive inrush current spikes that inflate consumer capacity tariff brackets. By coupling intelligent programmable timer switches (such as the TOMZN weekly 7-day and Bluetooth smart series) with over/under voltage relays, contractors can establish staggered power-on profiles, preventing simultaneous appliance restarts and shielding end-users from penalty tariff brackets.
24+
Years Engineering Expertise
5,700 m²
TÜV Assessed Factory
<0.1s
Overvoltage Trip Response
100+
Export Compliance Markets
Localized Engineering
Belgian Application Scenarios for Protective Devices
Tailored configurations addressing real-world electrical demands in residential retrofits, industrial facilities, and solar-plus-storage topologies.
Residential PV & Battery Storage Boards
Integrated downstream of solar microinverters and hybrid battery systems across Flanders. Automatically disconnects sensitive domestic loads whenever grid voltage spikes above 253V due to high solar feeder penetration, preventing inverter cycling and household electronics wear.
Heat Pump & Geothermal Compressors
Designed to combat brownouts and voltage dips in rural Ardennes and Limburg agricultural sectors. Incorporates 0.1s to 300s asymmetric reconnection delays to safeguard compressor motors against sudden back-pressure re-strikes following transient grid cuts.
EV Charging Sub-Panels (Wallbox Systems)
Supervises 3-phase 11kW/22kW charging stations. Mitigates upstream neutral wire disconnection hazards which can shift 230V line-neutral potentials into dangerous 400V surges, destroying high-end on-board automotive chargers.
Brussels Delta Grid Retrofitting (3x230V)
Engineered with true 2-Pole synchronous switching to simultaneously disconnect both active lines in older Brussels delta supply zones, ensuring zero residual voltage and adhering to strict AREI compliance standards.
Industry Outlook 2025–2030
Emerging Trends in Belgian Electrical Protection
How dynamic tariff structures, bidirectional energy flows, and electrification regulations are accelerating the transition to intelligent protection.
Dynamic Hourly Tariff Integration
Belgian suppliers (Engie, TotalEnergies, Luminus) increasingly offer dynamic EPEX SPOT day-ahead pricing. Protective devices now combine voltage monitoring with Bluetooth/IoT energy scheduling to halt heavy drawing loads during extreme peak price spikes.
Neutral Failure Protection (Open PEN Hazards)
As aging underground and overhead infrastructure faces growing peak loads, broken neutral conductors present catastrophic fire risks. Next-generation voltage protectors feature ultra-fast phase unbalance and floating neutral cutoffs within milliseconds.
Compact High-Density Enclosure Layouts
Belgian residential distribution boards (such as 18-module and 36-module Schneider Resi9, Hager, or ABB enclosures) face spatial constraints. Manufacturers that combine overvoltage, undervoltage, overcurrent, and kWh display into an ultra-slim 2-module DIN form factor hold substantial market advantages.
Verified OEM / ODM Factory
Direct Manufacturing Strength: Zhejiang TMB Electric Co., Ltd.
Combining 24 years of manufacturing heritage in Liushi, Wenzhou with verified European standard production controls.
Integrated Engineering from China's Electrical Capital
Located in Liushi Town, Wenzhou—China’s epicenter for low-voltage switchgear—Zhejiang TMB Electric Co., Ltd. controls the complete supply chain from raw copper stamping and precision silver-alloy contacts to injection molding and microcomputer calibration.
Our production facility has been assessed on-site by TÜV Rheinland, ensuring complete traceability, calibrated trip curves, dielectric withstand testing, and CE-marked low-voltage compliance tailored for European professional procurement.
Procurement Guide
Frequently Asked Questions for Belgian Importers & Wholesalers
Answers to technical, regulatory, and logistics inquiries from Belgian electrical panel builders, EPCs, and distributors.
Are these voltage protectors compliant with Belgian RGIE / AREI standards?
Yes. Our over and under voltage protectors are designed in alignment with European low-voltage directives (LVD 2014/35/EU) and electromagnetic compatibility standards (EMC 2014/30/EU), carrying official CE marking. They utilize standard DIN-rail 35mm modular sizing (DIN EN 50022), permitting clean integration into Belgian domestic and tertiary consumer units compliant with AREI / RGIE Article 4.4 and Synergrid prescriptions.
How do the protectors handle legacy Belgian 3x230V networks without a neutral?
For 3x230V networks commonly found in Brussels and older urban sectors, we supply true 2-Pole (2P) dynamic break protectors that monitor Phase-to-Phase nominal 230V potential. When an overvoltage or undervoltage fault occurs, the internal actuator physically isolates both live conductors at the same instant, ensuring that no voltage potential remains on the load side and satisfying strict Vinçotte/BTV safety checks.
Can threshold limits and reclosing delay times be customized at the factory?
Yes. We offer fully digital adjustable models that allow installers to configure overvoltage limits (230V–300V), undervoltage limits (140V–210V), overcurrent limits (1A–80A), and recovery delays (1s–500s) directly via front buttons or mobile app. For large OEM batches, our factory can pre-program non-volatile firmware defaults to meet specific distributor preferences.
What are the minimum order quantities (MOQs) and delivery times to Antwerp/Zeebrugge?
Catalog models feature an accessible sample/trial MOQ of just 5 units, allowing distributors and panel builders to perform on-site technical bench testing. Production lead times for standard volume orders run 15–20 days. Shipments to Port of Antwerp or Zeebrugge take approximately 28–35 days by sea freight, while urgent evaluation samples ship via air courier (DHL/FedEx/UPS) within 5–7 working days.
Do you offer private labeling, laser marking, and customized packaging?
Yes. As a verified OEM/ODM manufacturer, we support private label pad printing or high-resolution laser etching of your brand logo, custom model codes, wiring schematics, and EAN-13 barcodes. We also provide multilingual instruction manuals (French, Dutch, English, German) and custom retail packaging boxes for Belgian wholesale distribution.
How does the device integrate with Fluvius digital meters and smart meters?
Our protectors are installed on the consumer side immediately after the primary RCD/differential switch that connects to the Fluvius smart meter (SMR 5.0). By maintaining real-time voltage and current monitoring, our devices protect sub-circuits against feeder disturbances and help regulate automated peak shedding to mitigate capacity tariff penalties.