TOMZN Bluetooth Smart Timer Switch 85-265VAC 10A 30A EasyCon Wall-mounted Countdown 28 Groups Timing Loop Timing
AC 85–265V | 10A/30A | App Integrated Duty Cycling
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Engineering Lineup
Motor Circuit Control, Switching & Thermal Overload Protection
Verified DIN-rail assemblies and electronic monitoring devices matched with contactors for robust motor protection across Edmonton manufacturing facilities, pump jacks, and HVAC infrastructure.
TOMZN New Type Din Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay Timer AC 220V 230V 12V 24V 48V 16A
16A Relay Contact | 7-Day Scheduler | Multi-Voltage Control
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TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A 85-265V EasyCon App Remote Control DIN Rail Countdown 28 Groups Timing Loop
40A / 63A Continuous | DIN Rail | Heavy Pump Switching
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TORT7 Series Delay-ON Delay-OFF 10in1 Asymmetric Cycler Time Relay Multi-function Timer Switch 0.1S-10D Pulse Generator Interval
10-in-1 Modes | 0.1s - 10 Days | Motor Starter Sequencing
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TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail Wall-mounted Timing Countdown Loop Timing AC85-265V 40A Tomzn Official
35mm DIN Mount | 40A Rating | Automated Load Cycle
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TOMZN 1NO 1NC Din Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH Relay Timer AC 220V 230V 12V 24V 48V 16A
1NO + 1NC Contacts | Auxiliary Trip Signaling | 16A
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63A 3-Phase 3P+N DIN Rail Comprehensive Over/Under Voltage & Electronic Thermal Motor Relay
Phase Loss & Unbalance | True RMS Measurement | 63A
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Modular Bimetal-Coordinated Adjustable Over-Current & Thermal Protection Relay with Real-Time kWh Telemetry
Class 10A/20 Trips | Auto/Manual Reset | 110V-240V
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24+
Years Manufacturing Expertise
5,700 m²
TÜV Rheinland Audited Facility
-40°C to +70°C
Edmonton Climate Testing Verified
Class 10/20
Precision Tripping Standard
Engineering Whitepaper
Overcoming Thermal Overload Challenges in Edmonton’s Harsh Industrial Climate
A rigorous examination of bimetallic trip physics, ambient temperature compensation under the Canadian Electrical Code (CEC), and phase-failure mitigation in heavy oil sands and manufacturing loads.
In Greater Edmonton, Nisku Industrial Park, and the industrial heartland around Fort Saskatchewan, electric induction motors operate under environmental conditions rarely seen in standard manufacturing basins. The thermal overload relay (TOR) represents the first line of defense for three-phase motors driving centrifugal slurry pumps, hydraulic power units, drill rigs, conveyor lines, and heavy HVAC blowers. While short circuits are handled upstream by molded case circuit breakers (MCCB) or fast-acting fuses, running overloads (105% to 600% Full Load Amperage) demand electrothermal modeling that reflects the true thermal limits of motor windings.
Crucial Engineering Factor: Ambient Compensation in Sub-Zero Climates
Uncompensated bimetallic relays installed inside unheated outdoor enclosures in Edmonton (-35°C in January) will artificially stay cold, failing to trip when the motor inside a heated building is burning out. Conversely, control cabinets exposed to solar radiant heating during July heatwaves (+32°C) cause nuisance tripping. Our relays utilize reverse-deflecting bimetallic compensating strips that isolate motor heat dissipation from cabinet ambient temperatures, maintaining strict trip threshold curves from -40°C through +70°C.
Trip Curve Selection: Class 10 vs. Class 20 vs. Class 30
Specifying engineers in Alberta must evaluate motor starting inertia (WK²) to prevent nuisance tripping during across-the-line starts without sacrificing locked-rotor thermal damage margins (I²t limits dictated by NEMA MG-1 and IEC 60947-4-1). Selecting the incorrect trip class leads to either premature contactor cycling or stator insulation degradation.
| Trip Class (IEC / NEMA) | Tripping Time @ 7.2 × Ir (Locked Rotor) | Typical Edmonton Industrial Applications | Recommended Relay Mechanism |
|---|---|---|---|
| Class 10 / 10A | 2 to 10 seconds | Centrifugal pumps, commercial air handling units, machine tool spindles, standard conveyor belts. | Direct-heated bimetallic element with ambient compensation strip; 1NO+1NC auxiliary. |
| Class 20 | 6 to 20 seconds | Industrial compressors, mud pumps, slurry agitators, positive displacement blowers in refinery sumps. | Bimetal with saturable current transformer coupling or electronic microprocessor relay. |
| Class 30 | 9 to 30 seconds | High-inertia centrifugal extractors, mining crushers, shredders, ball mills in oil sands extraction. | Electronic programmable motor protection relay with full I²t thermal memory models. |
In three-phase delta-connected motors operating on 480V or 600V distribution common across Alberta, an open phase creates asymmetric current spikes in remaining windings. Standard dual-bimetal units fail to detect current starvation rapidly enough, leading to catastrophic local heating. Our relays integrate a differential trip slider mechanism: when one bimetal fails to heat while two expand, the mechanical differential trips the auxiliary disconnect in under 3 seconds, preserving motor winding integrity.
Field Deployments
Localized Applications Across Northern Alberta's Core Sectors
From petrochemical processing to agri-food automation, discover how our thermal overload assemblies perform across Edmonton's leading industries.
Refining & Petrochemical Infrastructure
Deployed in Strathcona County refineries and Nisku oilfield fabrication shops. Resists corrosive hydrogen sulfide traces and ambient outdoor chill while shielding heavy crude transfer pumps, hydrocarbon transfer lines, and explosive-gas rated compressor skids against mechanical binding overloads.
Cold Logistics & Agricultural Processing
Installed across grain terminals, malting facilities, and temperature-controlled logistics centers along the Yellowhead corridor. Integrated differential mechanisms handle frequent cycling of augers, cooling fans, and sorting conveyors where frost buildup imposes extreme mechanical resistance.
Municipal Water & District Heating
Safeguarding variable speed drives and bypass motor circuits within EPCOR-serviced municipal pumping networks and district energy centers. Auxiliary NO/NC signal contacts integrate directly with SCADA RTUs for predictive maintenance and remote reset management.
Future-Proofing
Emerging Market Trends in Edmonton Electrical System Design
How Alberta’s carbon transitions, electrification, and modern Canadian safety codes are reshaping thermal overload relay requirements.
Smart IoT Telemetry & Predictive Tripping
Panel builders in Edmonton are transitioning away from passive, unmonitored bimetals. Incorporating intelligent timing relays and energy measurement sensors allows facilities engineers to track thermal loading trends over Bluetooth and cloud dashboards before a shutdown occurs.
Modular CEC Compliance & Arc Flash Safety
Tightening CSA C22.1 standards demand isolated control compartments. Contemporary installations prefer DIN-rail mounted starters with finger-safe IP20 terminals, clear trip indicator flags, and external manual trip actuators that reduce cabinet access needs.
Severe Environment Polymer Formulations
Extreme winter thermal contraction followed by high-current heating cracks cheap housing thermoplastics. High-grade, glass-filled polyamide compounds with UL94-V0 self-extinguishing ratings are now mandatory specifications for Alberta EPC projects.
Manufacturer Authority
Why Edmonton Wholesalers & Panel Builders Partner With Us
Combining 24 years of manufacturing heritage, TÜV Rheinland on-site audit credibility, and Liushi low-voltage supply chain efficiency.
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24 Years of Low-Voltage Specialization
Two decades of dedicated switchgear research, producing high-reliability motor controls, MCB, MCCB, and timer switches with deep precision calibration.
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TÜV Rheinland Assessed 5,700 m² Facility
Independently audited manufacturing facility with 92 verified staff, ISO9001 certified quality management, and strict incoming material testing.
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Complete In-House Liushi Supply Chain
Located in the heart of China’s electrical capital, guaranteeing direct access to high-purity copper terminal stamping, silver contact sintering, and custom molding.
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Agile OEM / ODM & Low MOQ Evaluation
Standard models ship with low trial MOQ (from 5 pcs), private labeling, custom calibration scales, and custom pre-assembled motor starter control boxes.
Procurement Guide
Frequently Asked Questions by Alberta Engineers & Buyers
Technical clarifications on standards alignment, cold-weather sizing, and ordering logistics.
How do your thermal overload relays perform under extreme -40°C Edmonton winter conditions?
Our bimetallic thermal overload relays incorporate a built-in ambient temperature compensating bimetal that deflects inversely to ambient temperature variations. This mechanism ensures that the trip curve remains calibrated across an operational range of -40°C to +70°C, preventing dangerous under-tripping in sub-zero outdoor skids or false nuisance tripping during summer peak operations.
Can your thermal relays and contactors be supplied for 600V 60Hz Canadian electrical networks?
Yes. We design and test units for rated insulation voltages (Ui) up to 690V and 1000V, with operating frequencies calibrated for 50Hz and 60Hz. Models comply with IEC 60947-4-1, CE standards, and dielectric withstand tests, making them fully compatible with standard 208V, 480V, and 600V industrial networks across Western Canada.
What is the recommended difference between Class 10 and Class 20 for oilfield pumping equipment?
Class 10 is designed for standard squirrel-cage motors with low-inertia starting profiles, tripping in 10 seconds or less at 7.2× the rated current. For heavy mud pumps, viscous bitumen transfer augers, or high-head submersible pumps common around Nisku and Fort McMurray, Class 20 allows prolonged starting sequences (up to 20 seconds at 7.2× Ir) without tripping, protecting the motor once running torque stabilizes.
Do you offer OEM private label branding and customized current adjustment ranges?
Yes. We provide complete OEM/ODM manufacturing services from our Liushi production facility. We can laser-mark customer logos, produce customized multi-lingual dial plates, offer specialized dial ampere ranges, and design custom pre-wired distribution and control enclosures.
What are the shipping lead times and minimum order quantities (MOQ) for Canadian orders?
Standard catalog models have a low evaluation MOQ starting from 5 pieces (with certain timers starting from 1 piece) to enable quick prototyping and lab evaluation. Sample batches typically dispatch within 3–5 business days via air freight to Edmonton International Airport (YEG), while sea freight container shipments to Port of Vancouver with CN Rail transfer arrive within 25–35 days.
Are factory audit reports and full electrical type test reports provided prior to ordering?
Absolutely. Our manufacturing plant has been assessed and verified on-site by TÜV Rheinland. We can provide the third-party facility inspection assessment report, ISO certification papers, CE declarations of conformity, and comprehensive electrical tripping curve datasheets directly to your engineering team.