TORT7 Multifunction Asymmetric Time Relay Switch
10-in-1 multi-function cyclic delay-ON and delay-OFF control relay. Broad timing range from 0.1s up to 10 days for PV combiner sequencing and inverter resetting.
Factory Direct Catalog
High-Yield PV Protection & Intelligent Switching Series
Pre-tested string protection modules, precision time control relays, and high-voltage DC protection components engineered for extreme durability and commercial integration.
TOMZN TOS7-B Bluetooth Smart DIN Rail Timer Switch
High-current 40A/63A smart control, 85–265V universal AC range. Mobile app programming via EasyCon with 28 timing memory loops for distributed balance-of-system control.
TOMZN 1NO+1NC DIN Rail Weekly Digital Time Switch
Programmable 7-day cyclical timer switch with dry contacts. Multi-voltage support (AC 220V/230V or DC 12V/24V/48V) for microgrid switching and PV sub-station arrays.
TOMZN Upgraded Single-Phase 16A Digital Timer
Industrial DIN-rail mounting form-factor with high-contrast LCD and anti-interference micro-controller for harsh grid substations and cold-climate monitoring.
TOS6-40 Hybrid 35mm DIN & Wall Mount Bluetooth Controller
Rated for AC 85–265V 40A inductive and resistive switching. Flexible dual-mounting mechanism with smart loop and countdown sequencing for localized power control.
TOMZN Bluetooth Smart Countdown Controller 10A/30A
Wall-mounted smart protection and scheduled automation controller. Optimized for remote container stations, telemetry nodes, and distributed off-grid sites.
TOMZN Solar DC Surge Protective Device (SPD) 500V–1000V
Class II DC arrester featuring high-energy metal oxide varistors (MOV), thermal disconnect mechanism, and visual status indication for PV arrays and combiner boxes.
Engineered IP65 Pre-Wired Solar Combiner Box with SPD
Weatherproof outdoor distribution enclosure integrated with DC MCBs, high-voltage fuses, and Class II surge protective devices for utility and commercial installations.
Direct Factory Advantage
24 Years of Precision Manufacturing in Liushi, Wenzhou
Operating inside China’s primary low-voltage electrical cluster, Zhejiang TMB Electric Co., Ltd. delivers robust PV protection systems tested and accredited under strict international regimes.
Liushi Supply-Chain Clustering
Direct supply-chain integration ensures sub-millimeter tooling tolerances, flame-retardant polyamide enclosures, and pure electrolytic copper buses delivered on fast manufacturing turnarounds.
TÜV Rheinland Assessed
Factory premises, human resources, assembly lines, and testing equipment are audited on-site by TÜV Rheinland, assuring verifiable quality systems and consistent batch conformity.
Full DC/AC Protection Breadth
Comprehensive DIN-rail ecosystems: from 1000V DC surge protective devices, molded case breakers, and IP65 combiner boxes to automatic transfer switches and multi-function timers.
Frictionless CIS & Russian Trade
Experienced documentation support: CE declarations, EAC compliance-readiness, HS code harmonization, flexible private branding (OEM/ODM), and rapid sea/rail multimodal logistics.
Engineering Whitepaper Focus
Engineering PV Surge Protection for the Russian Federation
Deploying photovoltaic systems across Russia demands rigorous engineering adaptation to withstand sub-zero cold, prolonged permafrost footing transitions, and lightning transients during continental storm fronts.
Climatic Extremes & Sub-Zero Operation
In regions such as Siberia, the Urals, and the Far East, ambient temperatures routinely drop to -40°C or below. Conventional consumer SPDs suffer mechanical housing cracking and thermal disconnection solder crystallization.
- Thermal Disconnector Integrity: High-reliability spring-loaded mechanisms rated for non-brittle release down to -45°C.
- Polymer Stability: Reinforced PA66 enclosures resistant to cryo-fracture and UV-induced embrittlement.
- Anti-Condensation Sealing: Tight creepage barrier tolerances prevent frost-driven flashovers inside combiner enclosures.
Grid Fluctuations & Long Overhead Lines
Distributed installations often connect to distant 10kV or 35kV rural feeders susceptible to seasonal overvoltages, load-drop swings, and secondary lightning inductions traveling miles across open terrain.
- Elevated Uc Margins: High maximum continuous operating voltage (1060V DC for 1000V strings) prevents premature varistor thermal runaway.
- Superior Up Clamping: Dynamic residual voltage clamping below 3.6kV ensures zero insulation breakdown on sensitive inverter IGBTs.
- Coordinated Multi-Stage Arresters: Seamless Class I (10/350µs) and Class II (8/20µs) coordination across junction arrays.
EAC & GOST Compliance Alignment
Procurement teams in Moscow, Saint Petersburg, and regional centers require equipment that integrates smoothly with GOST R 50571.7.712 and Technical Regulations of the Customs Union (TR CU 004/2011).
- Certified Arc Extinction: High internal short-circuit withstand ratings (ISCCR up to 25kA DC) eliminate fire hazards.
- Modular Replacement Plugs: Front-accessible DIN cartridges allow field technicians to hot-swap consumed MOVs in minutes.
- Remote Telemetry Contacts: Integrated floating changeover contacts for SCADA notification in unattended solar parks.
| Electrical Parameter | Residential Solar (DC 500V/600V) | Commercial PV Arrays (DC 800V/1000V) | Utility & Industrial Microgrid (DC 1000V+) |
|---|---|---|---|
| Normative Standard | IEC 61643-31 / EN 50539-11 | IEC 61643-31 / GOST IEC 61643-31 | IEC 61643-31 / Class I + II Available |
| Max Continuous Voltage (Uc) | 600V DC | 1000V / 1060V DC | Up to 1200V DC |
| Nominal Discharge Current (In) | 10 kA (8/20 µs) | 20 kA (8/20 µs) | 20 kA – 30 kA (8/20 µs) |
| Max Discharge Current (Imax) | 20 kA (8/20 µs) | 40 kA (8/20 µs) | 40 kA – 60 kA (8/20 µs) |
| Voltage Protection Level (Up) | ≤ 2.5 kV | ≤ 3.6 kV | ≤ 4.0 kV |
| Operating Temp Window | -40°C to +80°C | -45°C to +85°C (Reinforced) | -50°C to +85°C (Arctic Option) |
Strategic Market Insight
Solar Energy Evolution in the Russian Federation & EAEU
A closer look at how Russian regional electrification initiatives, isolated diesel-solar microgrids, and commercial rooftop rollouts are reshaping component procurement.
Northern & Far Eastern Hybrid Microgrids
Decentralized settlements in Yakutia and Magadan are replacing expensive diesel generation with solar-diesel hybrid systems. These remote nodes rely on fail-safe DC SPDs and timed transfer switches to avoid costly emergency repairs.
Commercial Rooftop & Logistics Hubs
Rising industrial energy tariffs have accelerated private solar adoptions across distribution hubs in the Moscow Ring and Krasnodar krai, creating surging demand for 1000V DC string-level protection boxes.
Direct Pivot to Chinese Component Standards
With traditional European brands withdrawing from the CIS market, EPCs, panel builders, and electrical wholesalers actively transition to certified first-tier Chinese manufacturers capable of guaranteed supply continuity.
Localization & EAC Customs Optimization
Importers prioritize vendors with streamlined documentation pathways, low initial sample MOQ requirements (from 5 units), and transparent testing certificates to clear Far East and overland border transit swiftly.
Documented Credibility
Verified Industrial Capacity: Zhejiang TMB Electric Co., Ltd.
Combining 24 years of manufacturing heritage with on-site verified production assets to guarantee repeatable reliability across thousands of DIN-rail and combiner box units.
Modern Production Workshop
Our specialized 5,700 m² factory in Huabei Village, Liushi Town, Wenzhou operates dedicated production lines for miniature circuit breakers, DC MCCBs, automatic transfer switches, and solar combiner boxes with complete component traceability.
TÜV Rheinland Audited
Independently inspected on-site by TÜV Rheinland specialists. We maintain rigorous incoming material validation for high-grade silver alloy contacts, copper busbars, and UL94-V0 rated fire-retardant thermoplastics.
Global Export Track Record
With verified annual exports surpassing US$ 3.3 Million across more than 100 international markets, our logistics and engineering teams provide seasoned support for export clearing, customs documentation, and OEM branding.
Buyer Guidance
Frequently Asked Questions by Russian & CIS Importers
Direct engineering answers addressing compliance, cold-weather resilience, customs clearance, and trial order terms.
How do TMB surge protective devices handle severe sub-zero winter temperatures down to -40°C?
Our PV surge protectors utilize reinforced internal thermal disconnectors calibrated with low-temperature resilient spring alloys and cold-rated solder formulations. Unlike standard domestic arresters that experience micro-fractures in sub-zero continental conditions, our components maintain specified trip parameters from -45°C to +85°C. Furthermore, housings are cast from high-grade virgin PA66 to eliminate brittle cracking during winter maintenance operations.
What documents and certifications do you supply for customs clearance under TR CU (EAC)?
We provide full factory test reports, CE declaration dossiers, RoHS compliance certificates, and technical product passports detailing galvanic insulation, dielectric withstand, and discharge capacity. Our export department works closely with your customs brokers to supply standardized commercial invoices, packing lists with precise HS code classifications (such as 8536.30 for surge arresters), and third-party on-site audit reports from TÜV Rheinland to expedite local EAC declaration registration.
Can an AC surge arrester or AC circuit breaker be installed in a DC solar string?
No. This is a critical safety violation. Alternating current has a natural sine-wave zero-crossing point that extinguishes electrical arcs automatically. Direct current maintains continuous arcing without natural zero-crossing. Installing an AC device on a 500V–1000V DC string creates an extreme fire hazard because the unit will fail to break the arc during an overvoltage or fault event. Always specify purpose-built DC SPDs and DC MCBs engineered with internal arc chutes and magnetic blowouts rated for string open-circuit voltage (Voc).
What is the minimum order quantity (MOQ) for distributor trials and custom branding?
To assist distributors, EPC contractors, and panel assemblers in testing real-world performance, our standard catalog models (including DC SPDs, timers, and breakers) can be ordered with a trial MOQ starting from just 5 pieces (with selected relay items available from 1 piece). For custom OEM branding (private label pad-printing, custom color levers, specialized combiner box wiring, and custom Russian-language packaging), MOQs are flexible and evaluated per project scope.
How do I coordinate lightning arresters across long overhead DC transmission runs in solar farms?
In wide-area solar farms common to the Southern and Volga federal districts, lightning strikes on nearby structures or soil introduce massive induced voltages along long exposed cables. We recommend a two-tier coordinated protection scheme: install Class I+II (or heavy Class II 20/40kA) DC SPDs inside combiner boxes near the solar arrays to clamp high initial surges, and place Class II arresters directly at the DC inverter inputs. Where distance exceeds 10 meters between the array box and the central inverter, SPDs must be installed at both ends according to IEC 61643-32 guidelines.
What are the lead times and shipping routes to Moscow, Vladivostok, and Saint Petersburg?
Standard catalog items ship within 7–15 days from our Wenzhou factory. Custom OEM runs usually complete within 20–28 days. Goods destined for Russia typically transit via multimodal container rail direct through border checkpoints (such as Manzhouli/Zabaikalsk) to Moscow/Kazan within 18–25 days, or via short-sea container shipping from Ningbo/Shanghai to Vladivostok (3–7 days transit) with subsequent Trans-Siberian rail link into western regional hubs.
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