Automation & Isolation
Engineered Surge Protection & Din-Rail Automation
Direct factory procurement solutions configured for secondary sub-distribution boards, industrial automation systems, and renewable installations across the Arabian Gulf.
Heavy Current Control
TOMZN TOS7-B Bluetooth Smart Timer Switch 40A 63A DIN Rail Countdown 28 Groups Timing
Distribution Metering
TOMZN Din Rail Single Phase Weekly 7 Days Programmable Digital TIME SWITCH AC 220V 16A
Process Sequencing
TOS6-40 Bluetooth Time Control Switch 35mm DIN Rail Wall-mounted Timing AC85-265V 40A
Transient Protection Relay
TORT7 Series Delay-ON Delay-OFF 10in1 Asymmetric Cycler Time Relay Switch 0.1S-10D
Auxiliary Control
TOMZN 1NO 1NC Din Rail Single Phase Weekly 7 Days Programmable Relay Timer AC 220V 16A
Core Arrester Series
TOMZN DC Surge Protective Device SPD 500V-1000V 20-40kA High Discharge Arrester
Integrated Protection
IP65 Solar PV Combiner Box Integrated with Breakers, DC Fuses and Lightning Arresters
24+
Years Engineering Heritage
5,700m²
TÜV Verified Manufacturing
40kA
Max Surge Discharge Capacity
100+
Global Export Destinations
Overvoltage Suppression Architecture in the Dammam Industrial Hub
The coastal territory of the Eastern Province—encompassing the key logistical hubs of Dammam, Jubail, and Al-Khobar—presents an uniquely hostile environment for medium- and low-voltage electrical switchgear. Operating within immediate proximity to the Arabian Gulf exposes electrical distribution infrastructure to extreme relative humidity, high salt spray atmospheric concentration, and ambient surface temperatures routinely exceeding 52°C during summer peaks. In standard utility configurations, transient surges caused by direct atmospheric strikes are compounded by intense switching surges from mega-watt induction loads inside nearby petrochemical refineries and desalination facilities.
Specifying Lightning Arresters (Surge Protective Devices - SPDs) for Dammam's First and Second Industrial Cities requires careful divergence from generic European or North American specifications. In accordance with local SASO (Saudi Standards, Metrology and Quality Organization) mandates and IEC 61643-11/31 protocols, primary incomers require heavy-duty Class I/Type 1 spark-gap or hybrid MOV arresters capable of routing a minimum of 12.5 kA to 25 kA (10/350 μs waveform) to earth without thermal runaway. Secondary and branch circuits require Type 2 (8/20 μs waveform) varistors with thermal disconnection mechanisms capable of enduring persistent line overvoltages (TOV) triggered by regional grid fluctuations.
Furthermore, our manufacturing plant incorporates encapsulated, non-venting zinc oxide (ZnO) varistor blocks treated with hydrophobic silicone coatings. This completely prevents internal micro-arcing induced by hygroscopic salt deposition—a failure mode endemic to standard unsealed arresters deployed in coastal Saudi installations.
Localized Application Scenarios in Eastern Saudi Arabia
Customized surge containment topologies engineered to protect multi-million dollar infrastructure against thermal stress and transient overvoltages.
Petrochemical & Downstream Refining
In hazardous environments around Jubail and Dammam Port, non-arcing, heavy-duty DIN-rail surge arresters are deployed inside flameproof Ex d control panels. These arresters protect PLC racks, fieldbus transceivers, and telemetry systems against high-energy electromagnetic pulses generated by major inductive motor trips and external substation faults.
Utility-Scale & Commercial Solar PV
Photovoltaic installations across the Eastern Province face immense electrostatic build-up driven by arid sandstorms followed by sudden coastal convective storms. Our 1000V and 1500V DC surge protection devices provide essential common-mode and differential-mode clamping, safeguarding central and string inverters against irreversible dielectric puncture.
Critical Logistics & Cold Chain Infrastructure
Cold storage facilities and automated warehouses servicing King Abdulaziz Port require continuous chilling uptime. Integrating Type 2 lightning arresters alongside digital timer switches and automatic transfer switches (ATS) eliminates nuisance breaker tripping and defends refrigeration VFDs from grid degradation.
Regional Market Shift: Saudi Vision 2030 & Surge Standards Modernization
The electrical landscape across Saudi Arabia is undergoing an unprecedented modernization cycle driven by the Saudi Vision 2030 infrastructure initiatives. Historically, electrical contracts permitted generic distribution boards without dedicated internal surge suppression, relying merely on structural exterior lightning rods (Franklin rods or early streamer emission systems). However, field data gathered from smart grid substations across SEC (Saudi Electricity Company) territories demonstrated that over 74% of electronic equipment destruction originated not from direct lightning strikes, but from line-conducted transient surges.
Consequently, procurement guidelines across commercial developments, government megaprojects, and industrial masterplans are now strictly requiring coordinated Three-Stage Surge Protective Schemes compliant with SASO IEC 62305:
- Stage 1 (Main MDB): Combined Type 1+2 heavy-duty spark gap arresters with a minimum discharge capacity of 50 kA (10/350 μs) to clamp lightning surges entering via primary utility lines.
- Stage 2 (Floor SMDBs): Modular plug-in Type 2 arresters with remote signaling contacts, maintaining a residual voltage protection level (Up) below 1.5 kV.
- Stage 3 (Terminal Equipment & DBs): Fine-protection Type 3 arresters integrated with digital control relays and smart timing isolators for automation nodes.
Manufacturers supplying the Dammam trade corridor must deliver devices certified for continuous operation under an ambient baseline temperature of +55°C, ensuring that thermal disconnection curves do not prematurely trip under legitimate sustained solar heating.
Comprehensive Arrester Specification Matrix
Direct engineering parameters across low-voltage AC and DC surge arresters designed for harsh Gulf operating conditions.
| Parameter / Classification | Type 1+2 Combined AC Arrester | Type 2 Sub-Distribution SPD | Photovoltaic DC Arrester |
|---|---|---|---|
| Applicable Standard | IEC 61643-11 / EN 61643-11 | IEC 61643-11 / SASO Compliant | IEC 61643-31 / EN 50539-11 |
| Nominal Voltage (Un) | 230V / 400V AC (50/60 Hz) | 220V / 380V AC (50/60 Hz) | 600V / 1000V / 1500V DC |
| Impulse Discharge Current (Iimp 10/350 μs) | 12.5 kA – 25 kA per pole | N/A (Tested to 8/20 μs) | N/A (DC Specific Clamping) |
| Max Discharge Current (Imax 8/20 μs) | 50 kA – 100 kA | 20 kA – 40 kA | 40 kA |
| Voltage Protection Level (Up) | ≤ 1.5 kV | ≤ 1.2 kV – 1.8 kV | ≤ 2.8 kV – 3.6 kV |
| Thermal Disconnect Technology | Dual micro-mechanical spring trip | Internal thermal fuse link | Patented dynamic arc-extinguish fuse |
| Operating Ambient Temperature | -40°C to +85°C (Tropicalized) | -40°C to +80°C | -40°C to +85°C |
| Status Indication | Visual flag (Green/Red) + Remote NC/NO | Visual flag + Remote auxiliary dry contact | Mechanical flag window |
Why Enterprise EPCs Partner With Zhejiang TMB Electric
Direct manufacturer reliability supported by 24 years of manufacturing heritage in Liushi, Wenzhou—the low-voltage capital of the world.
TÜV Rheinland Audited
Our 5,700 m² factory with 92 staff undergoes rigorous on-site verification, ensuring dependable quality governance and traceable materials.
Clustered Supply Chain
Located in Liushi Town, our access to silver alloy contacts, flame-retardant housings, and bimetal parts provides unmatched cost efficiency and rapid lead times.
Full In-House Testing
Every batch undergoes thermal runaway verification, 100% dielectric isolation testing, and trip calibration before packaging.
Low MOQ & Fast OEM
Standard catalog orders start from just 5 pieces. We provide tailored private labeling, custom laser markings, and bespoke combiner box builds.
Frequently Asked Questions by Dammam Contractors & Engineers
Direct technical answers addressing procurement, ambient de-rating, SASO documentation, and installation best practices.
How does the extreme summer temperature in Dammam affect arrester ratings?
Ambient temperatures in outdoor enclosures across Dammam frequently reach 60°C to 70°C in direct sunlight. Standard varistors experience leakage current inflation under high temperatures, which can trigger premature thermal disconnect trip mechanisms. Our arresters utilize specialized high-temperature ZnO varistor discs rated for continuous operation at +85°C without de-rating, ensuring reliable longevity under Gulf thermal loading.
What is the recommended installation distance between Stage 1 and Stage 2 arresters?
To achieve proper energy coordination under IEC 62305, a physical cable length of at least 10 meters should exist between the primary Class I spark-gap arrester at the main distribution board and the secondary Class II MOV arrester at sub-distribution boards. If physical distance is shorter, a decoupling inductor (choke coil) or an integrated Class I+II coordinated device must be installed to prevent premature burnout of the fine-protection stage.
Do your surge arresters comply with SASO and Saudi Electricity Company (SEC) standards?
Yes. Our protection lines carry CE markings, conform strictly to IEC 61643-11 (for low-voltage AC) and IEC 61643-31 (for solar DC), and our manufacturing facilities operate under ISO 9001 quality management verified on-site by TÜV Rheinland. We supply full factory test reports, datasheets, and declarations of conformity required for Saber platform clearance and municipal project approvals.
Can I use an AC surge protector for a photovoltaic combiner box or DC battery system?
Never. AC arresters rely on the sinusoidal zero-crossing of the alternating current waveform to quench the follow-current arc after a surge clamp. Direct current (DC) has no natural zero-crossing. Deploying an AC SPD on a 600V or 1000V DC solar array will result in catastrophic arc failure, fire hazard, or physical explosion. Only dedicated DC SPDs with internal DC-rated thermal barriers and arc chambers should be used.
What lead time is expected for container shipments to Dammam Port (King Abdulaziz Port)?
Standard stocked catalog components ship from our Wenzhou factory within 3 to 7 business days. OEM production orders, custom combiner box configurations, or customized rating requests generally ship in 15 to 25 days. Ocean freight from Ningbo/Shanghai to King Abdulaziz Port in Dammam typically averages 18 to 24 transit days.
Engineering Support & B2B Factory Quotations
Submit your electrical schematics, bill of quantities (BOQ), or project specifications. Our engineering team responds within 24 hours with exact model cross-references, test certifications, and container-level pricing.