TOMZN Bluetooth Smart Timer Switch 85-265VAC 10A 30A Wall-Mounted
85-265VAC
28 Groups Timing
Bluetooth IoT
Industrial Grade Portfolio
Precision Switching, Control & Vacuum Breaker Peripherals
Engineered to deliver high mechanical endurance, instantaneous arc extinguishment, and smart digital integration across industrial distribution panels.
TOMZN 1NO 1NC DIN Rail Single Phase Weekly 7 Days Programmable Switch
16A Multi-Voltage
Microprocessor
DIN Rail 35mm
TOMZN High Precision Programmable Digital Switching Relay Timer
LCD Display
CE Certified
Weekly Loop
TORT7 Series 10-in-1 Asymmetric Delay Relay & Pulse Generator
0.1S-10D Range
10 Functions
Auxiliary Control
TOMZN TOS7-B Bluetooth Smart Heavy-Duty Timer Switch 40A 63A
Heavy Duty 63A
EasyCon App
Surge Resistant
TOS6-40 Bluetooth Dual Mount Time Control Switch 35mm DIN
AC85-265V 40A
Wall/Rail Mount
Loop Timing
TOM7Z 2P 1000V DC Industrial Heavy Molded Case Circuit Breaker
1000V DC
Thermal Magnetic
High Breaking Cap
TOB1-63H Precision Industrial AC MCB 1P C-Curve 3-63A
10kA Interruption
IEC 60898-1
Silver Contacts
24+
Years Manufacturing Experience
5,700m²
TÜV Rheinland Audited Facility
100+
Export Destination Markets
30,000+
Mechanical Switching Endurance
Technical White Paper
The Engineering Evolution of CE Certified Vacuum Circuit Breakers (VCBs)
The medium and high-voltage electrical distribution paradigm has radically shifted over the past decade. Industrial facilities, utility substations, renewable photovoltaic arrays, and critical microgrids increasingly discard older oil-immersed and sulfur hexafluoride (SF6) gas-insulated systems in favor of solid-dielectric, vacuum-based interruption technology. A CE-certified Vacuum Circuit Breaker (VCB) represents the pinnacle of electrical safety, mechanical endurance, and thermal arc suppression. Engineered to operate reliably between 12kV, 24kV, and up to 40.5kV systems, modern VCB architectures satisfy both the European Union's Low Voltage Directive (LVD 2014/35/EU), Electromagnetic Compatibility Directive (EMC 2014/30/EU), and rigorous IEC 62271-100 standards.
"Vacuum interruption technology eliminates hazardous greenhouse gases, providing an arc-quenching medium with a dielectric recovery speed thousands of times faster than atmospheric air or oil-based circuit interrupters."
Vacuum Arc Interruption: Contact Physics & Dielectric Recovery
At the center of every certified VCB is the hermetically sealed ceramic vacuum interrupter (VI). Within this envelope, an ultra-high vacuum level maintained below 10-5 Pa serves as both the primary insulating medium and the arc extinction zone. When moving contact electrodes separate under load or during short-circuit faults (often exceeding 25kA to 40kA symmetrical breaking capacity), the current initiates an electrical metal vapor arc derived exclusively from copper-chromium (CuCr) contact alloy surfaces.
Unlike air or SF6 breakers where arc energy dissociates toxic gaseous molecules, the metal vapor in a vacuum interrupter diffuses instantaneously to surrounding condensation shields at the first AC current zero. The dielectric strength across the contact gap recovers at rates exceeding tens of kilovolts per microsecond. This rapid recovery prevents reignition, restrikes during capacitive cable charging, and transient overvoltages that destroy sensitive downstream equipment such as dry-type transformers, solar inverters, and industrial variable frequency drives.
| Performance Metric | Vacuum Circuit Breaker (VCB) | SF6 Gas Circuit Breaker | Air Circuit Breaker (ACB) |
|---|---|---|---|
| Arc Quenching Medium | Ultra-High Vacuum (<10-5 Pa) | Electronegative SF6 Gas | Atmospheric Air / Arc Chutes |
| Environmental Impact | Zero GWP / Non-Toxic | High GWP (~23,500 CO2 eq) | Zero GWP |
| Dielectric Recovery Rate | Extremely Fast (~20-40 kV/µs) | Moderate (~5-10 kV/µs) | Slow (~1-2 kV/µs) |
| Mechanical Lifespan | 20,000 to 30,000 Operations | 5,000 to 10,000 Operations | 10,000 Operations |
| Maintenance Overhead | Maintenance-Free Sealed Bottle | Leak Monitoring & Recycling | Frequent Contact Dressing |
Key Industrial Applications Demanding High Dielectric Reliability
Modern electrical engineering applications have pushed medium-voltage switchgear far beyond predictable steady-state municipal networks. Our OEM/ODM manufacturing lines serve specialized sectors experiencing intense transient operational cycles:
- Large-Scale Solar & Wind Power Collection: Utility-scale solar farms require frequent automated breaker cycles matching cloud cover and daylight variation. Standard breakers suffer thermal breakdown, whereas vacuum interrupters endure high daily switching counts without de-rating.
- Electric Arc Furnace & Metallurgy Feeders: Extreme load fluctuations and frequent short-circuit conditions demand rapid contact break speeds and minimal contact erosion, where CuCr25 or CuCr50 alloy contacts are indispensable.
- Data Centers & Critical Healthcare Infrastructure: Paired with dual-power Automatic Transfer Switches (ATS), vacuum interrupters guarantee source-transfer transitions in under 3 to 5 electrical cycles, preserving microgrid synchronicity.
Market Intelligence
Future Procurement Trends in Medium-Voltage Switching
Global decarbonization directives and the proliferation of IoT-integrated substations are transforming technical specifications for vacuum switchgear.
Stringent F-Gas Phase-Outs & SF6 Bans
With the European Union tightening F-gas regulations (Regulation EU 2024/573), medium-voltage installations up to 24kV must eliminate SF6 installations by 2026-2030. Solid-insulated vacuum circuit breakers with environmentally neutral clean-air insulation represent the sole compliant, future-proof procurement standard for industrial infrastructure.
IoT-Enabled Predictive Monitoring
Substation operators require digital telemetry. Modern vacuum breakers integrate real-time optical travel sensors, primary contact temperature sensing via SAW (Surface Acoustic Wave) transponders, and electromagnetic coil current signatures to project contact wear and forecast maintenance windows years in advance.
Permanent Magnet Actuation (PMA)
Traditional mechanical spring mechanisms incorporate hundreds of high-wear springs, latches, and dampers. Procurement is pivoting toward Permanent Magnetic Mechanisms (PMA) that cut the number of moving parts by over 70%, yielding field service lifespans exceeding 100,000 switching operations without mechanism failure.
Why Choose TMB Electric
Integrated Industrial Cluster Advantages in Liushi
Operating from China's electrical capital, Zhejiang TMB Electric Co., Ltd. consolidates 24 years of manufacturing heritage into rigorous process controls and flexible B2B fulfillment.
Hyper-Localized Supply Chain
Situated in Huabei Village, Liushi, our factory sources precision copper stamping, silver brazing, and high-dielectric BMC housings within minutes, minimizing lead times and production volatility.
TÜV Rheinland Assessed
Every assembly line, testing protocol, and quality control workstation has undergone on-site physical auditing by TÜV Rheinland, assuring international procurement teams of operational transparency.
Low MOQ & Custom OEM/ODM
From sample batches of 5 pieces for prototyping and field type-testing to high-volume custom labeling, bespoke voltage configurations, and integrated PV combiner enclosures.
Multi-Tier Quality Gateways
Components undergo 100% dielectric insulation testing, contact resistance measurement via micro-ohmmeters, and thermal dynamic trip calibration prior to container staging.
Procurement FAQ
Frequently Answered Technical & Sourcing Questions
Essential guidance to support project specifications, compliance reviews, and purchasing workflows.
Q1: How does CE marking validate VCB performance for EU imports?
CE marking confirms total compliance with the Low Voltage Directive (LVD 2014/35/EU) and Electromagnetic Compatibility Directive (EMC 2014/30/EU). For medium-voltage apparatus, compliance is validated via third-party type test reports aligned with harmonized standard IEC/EN 62271-100 covering short-time withstand current, mechanical endurance, and temperature-rise limits.
Q2: What are the criteria for selecting fixed vs. withdrawable VCB units?
Fixed VCB configurations are ideal for compact ring main units (RMUs) and cost-optimized distributed substations where isolating switches isolate the busbar. Withdrawable (draw-out) types are required in heavy industrial and utility switchgear panels (such as KYN28A) to allow safe, rapid racking out for inspection without shutting down adjacent line bays.
Q3: Can low-voltage AC MCBs be substituted into solar DC breaker circuits?
Never. Direct current (DC) contains no natural sinusoidal zero-crossing point. An AC circuit breaker cannot extinguish a high-energy DC arc, resulting in catastrophic chamber burn-through or fires. DC applications require dedicated DC MCBs or DC MCCBs (such as our 1000V TOM7Z series) fitted with permanent magnetic arc-deflection blowouts.
Q4: How is vacuum bottle integrity verified after overseas sea transport?
Before commissioning, field technicians execute a 1-minute power frequency withstand voltage test across the open contacts at the rated test voltage (e.g., 42kV for a 12kV rated VCB). Alternatively, portable magnetron condition testers quantify remaining chamber pressure without disassembling the pole structure.
Q5: What contact alloy composition is optimal for renewable inductive loads?
Copper-Chromium (CuCr) alloys, specifically CuCr25 to CuCr50, provide the optimum balance between high interrupting capacity, low contact welding propensity during inrush currents, and minimal chopping current (under 3-5 Amperes) to prevent inductive surge voltages during motor or transformer disconnections.
Q6: What lead times and documentation are provided for custom OEM orders?
Standard catalog samples dispatch within 3-7 business days, while volume OEM container runs typically require 20-30 days. We provide comprehensive documentation packages including Declaration of Conformity (DoC), routine factory test certificates, terminal dimensional schematics, and bilingual wiring manuals.