TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A 85-265V EasyCon App Remote Control
DIN Rail mountable, 28 groups timing loop, automated solar load shedding controller.
24+
Years Manufacturing
5,700 m²
Production Base
TÜV
Rheinland Verified
1,000V+
DC Arc Isolation
100+
Export Territories
Catalog Showcase
High-Reliability Solar & Automation Switching Equipment
Explore our high-performance switching, timing, and string protection units optimized for off-grid PV architectures, hybrid microgrids, and load management across Suai, Timor-Leste.
TOMZN Din Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay Timer
Broad voltage support: AC 220V/230V, 12V, 24V, 48V 16A. Optimized for battery dispatch.
TOMZN Bluetooth Smart Timer Switch 85-265VAC 10A 30A EasyCon Wall-Mounted Switch
Compact form factor with 28 Groups Timing Loop for rural microgrid distribution boxes.
TORT7 Series Delay-ON Delay-OFF 10in1 Asymmetric Cycler Time Relay Switch
Configurable pulse generator & 0.1S-10D range for hybrid inverter sequence start.
TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail Wall-mounted Timing AC85-265V 40A
Robust 40A switching capability with low contact resistance for humid conditions.
TOMZN 1NO 1NC Din Rail Single Phase Weekly 7 Days Programmable Digital Relay Timer
Independent dry contact channel. Ideal for generator auto-start integration.
TOMZN 2P 1000V DC Solar String Disconnect Breaker & Isolator 32A-63A
IEC 60947-3 rated arc splitters for rapid interruption of zero-crossing DC current.
IP65 Weatherproof Solar DC Disconnect Combiner Box with Integrated SPD
UV-stabilized polycarbonate enclosure designed specifically for tropical sun exposure.
Suai Deployment
Engineering for Covalima's Complex Grid & Marine Climates
Deploying photovoltaic systems in Suai, Timor-Leste requires engineering resilience against high ambient salt spray, intense thermal cycling, and unbuffered grid fluctuations.
Coastal Salt-Mist & Marine Corrosion
Suai's position along the Timor Sea brings severe airborne chloride concentration. Standard disconnect switches experience rapid pitting of internal terminals. Our DC disconnect switches use silver-plated copper contacts (Ag-Ni alloy) housed in anti-tracking, flame-retardant enclosures (UL94-V0) sealed to IP66/IP65 standards, completely shielding current paths from salt crusting.
High Ambient Thermal De-rating Control
With year-round operating temperatures regularly exceeding 34°C and interior rooftop combiner boxes reaching 65°C, thermal de-rating is the chief cause of nuisance trips in Timor-Leste. TMB engineers our DC switches with broader magnetic trip gaps and robust bimetallic elements calibrated to maintain full nominal continuous load carrying capacity without premature degradation.
Microgrid Switching & Generator Integration
Off-grid agro-processing plants and community clinics across Covalima rely on hybrid solar-plus-diesel configurations. Our DC disconnects, paired with our class-leading Dual Power Automatic Transfer Switches (ATS) and programmable timer relays, guarantee break-before-make isolation, preventing dangerous back-feeding into solar inverter bridges during diesel start-up cycles.
Engineering Whitepaper Excerpt: Critical Direct Current Interruption in Suai Microgrids
Unlike AC networks where voltage naturally alternates across a zero-potential line 100 to 120 times per second to quench electrical arcs, direct current (DC) arcs generated by solar photovoltaic strings remain continuous and destructive. In coastal installations like Suai, failing to maintain an instant air-break gap leads to localized ionization, terminal carbonization, and severe catastrophic switch fires.
| Interruption Parameter | Standard Market Alternative | Zhejiang TMB Electric Standard | Suai Installation Benefit |
|---|---|---|---|
| Arc Chute Construction | Single-plate brass barrier | Multi-tier nickel-plated deionizing steel plates | Suppresses continuous 1000V DC arcs under 8 milliseconds. |
| Rotary Contact Mechanism | Slow-break mechanical wipe | Patented snap-action knife contact with spring preload | Eliminates operator-dependent switching speed errors. |
| Enclosure Protection Class | IP54 sheet metal with gasket | IP66 Polycarbonate UV-resistant casing with breathable vent | Equalizes internal pressure while stopping tropical rain ingress. |
| Dielectric Withstand | 2,000V AC isolation barrier | 4,000V AC impulse withstand rating (Uimp 8kV) | Resists direct monsoonal lightning transients from nearby mountains. |
Market Trajectory
Emerging Solar & Grid Realities in Timor-Leste
Strategic procurement analysis for solar engineers, public works authorities, and electrical wholesale distributors in Suai and surrounding regions.
1. Decentralized Rural Electrification
National energy planning in Timor-Leste continues to accelerate mini-grid installations in non-interconnected districts. The primary requirement has moved toward fully enclosed, plug-and-play combiner boxes equipped with DC isolating switches, allowing local non-specialized technicians to conduct safe preventive maintenance without exposure to high-voltage direct current strings.
2. Transition to 1000V & 1500V String Topologies
Utility-scale projects and institutional arrays in the Covalima district are rapidly shifting away from historical 600V DC configurations to 1000V architecture to reduce balance-of-system (BOS) copper cabling costs. This shift demands certified isolating hardware tested specifically under DC-PV2 utilization categories rather than repurposed AC breakers.
3. Intelligent Load Shedding Integration
Because battery energy storage systems (BESS) represent the single highest capital replacement expense in Suai off-grid applications, engineering contractors are incorporating digital timer switches and Bluetooth-controlled contactors to prioritize daytime PV self-consumption and automatically disconnect inductive motor loads prior to sunset.
Factory Excellence
Why Tier-1 Solar Installers Trust Zhejiang TMB Electric
Combining 24 years of manufacturing heritage in Liushi Town with rigorous international compliance to guarantee uncompromised switch reliability.
TÜV Rheinland Audited
Our 5,700 m² advanced manufacturing facility in Wenzhou undergoes stringent on-site validation by TÜV Rheinland, certifying transparent production capabilities, traceability, and ISO-standard Quality Management Systems.
Liushi Cluster Advantages
Positioned at the epicenter of China's premier low-voltage electrical industrial base, we control raw material sourcing from ultra-pure electrolytic copper stamping to localized molding, ensuring factory-direct lead times and competitive cost structures.
Full CE & IEC Compliance
Our complete range of DC isolating switches, circuit breakers, and combiner panels carries CE conformity markings, fully satisfying IEC 60947-1, IEC 60947-3, and international solar installation codes for global project procurement.
Flexible OEM/ODM & Low MOQ
We empower regional contractors and wholesalers in Timor-Leste with flexible trial MOQs starting from just 5 units, private label branding, and custom pre-wired combiner box engineering tailored to project string layouts.
Procurement Knowledge
Frequently Asked Questions for the Suai Solar Market
Authoritative technical guidance addressing common engineering, procurement, and shipping queries for East Timor projects.
Why is it dangerous to utilize conventional AC miniature breakers as DC solar disconnects in Suai?
Alternating current (AC) naturally drops to zero potential 100 or 120 times every second, allowing mechanical contacts to interrupt the arc easily. Direct current (DC) from solar arrays does not cross zero; it sustains a permanent, high-temperature electric plasma arc when contacts open. Conventional AC breakers lack the magnetic blowout coils, deep deionizing arc chutes, and wide gap clearances required. Using AC devices on DC strings frequently causes catastrophic switch meltdown and rooftop structural fires in tropical microgrids.
What utilization category should a solar disconnect switch have for Timor-Leste installations?
Disconnect switches must be rated under IEC 60947-3 with a utilization category of DC-PV1 or preferably DC-PV2. DC-PV2 ensures the switch can safely break full load currents in multi-string arrays, including operational overloads and reverse currents, under ambient temperatures of up to 60°C inside outdoor enclosures.
How do high humidity and maritime salt air affect the switch lifespan in coastal Suai?
Airborne moisture mixed with chloride salts causes terminal pitting, rapid galvanic corrosion, and tracking index breakdown along insulation barriers. For installations within 10 km of the Suai coastline, TMB mandates our IP66 weatherproof polycarbonate combiner enclosures with specialized breathable condensation valves, paired with high-content silver-alloy contacts to preserve low contact resistance.
Can Zhejiang TMB Electric deliver custom pre-wired combiner boxes directly for local projects?
Yes. We routinely assemble, pre-wire, and test custom combiner boxes featuring DC isolators, 1000V DC surge arresters (SPD), DC string fuses, and monitoring relays configured specifically to client schematics. This drastically cuts down installation time and reduces on-site wiring mistakes by local installation crews in Suai.
What are the lead times and shipping routes for consignments bound for Timor-Leste?
Standard catalog items ship from our Liushi factory within 7 to 15 days. For shipments to Timor-Leste, sea cargo is typically routed via Ningbo or Shanghai port with transshipment through Singapore or Surabaya directly to Dili Port (Porto de Tibar), from which freight is moved overland to Suai. Full export customs documentation, certificates of origin, and test reports are provided with every order.
Equip Your Next Suai Solar Project with Certified Protection
Consult with our electrical engineering team to configure certified DC isolators, dual power transfer switches, and turnkey combiner solutions built for lasting performance.