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TOMZN 3P+N Three Phase DIN Rail Voltage Current Meter & Adjustable Protection Relay

Name: TOMZN 3P+N Three Phase DIN Rail Voltage Current Meter & Adjustable Protection Relay
Brand: TOMZN
SKU: 1005001594326347
Price: 12.29 USD
Availability: InStock
Rating: 4.6 (17 reviews)

★ 4.6 / 5💬 17 avis🔥 28 sold🏷️ TOMZN🏬 Sold by Zhejiang Tongzheng Electric Co., LTD

à partir de€11.38

Options (3):

ℹ️ Final price per option is set on AliExpress.

Protect your electrical system with this TOMZN three-phase monitor featuring adjustable voltage and current protection. This DIN rail device is perfect for homeowners and professionals looking to safeguard sensitive equipment from unpredictable power fluctuations with ease and precision.

🛒 Acheter maintenant sur AliExpress → 📋 Caractéristiques complètes, tailles, matériaux et description détaillée — sur la page produit AliExpress →

🌍 Ships worldwide via AliExpress with a tracking number. Any local import taxes (if any) are set by your country's customs, not by InstaShop.

💡 Pourquoi acheter · Analyse InstaShop

✅ Provides real-time voltage and current monitoring for all th
✅ Configurable protection thresholds for overvoltage, undervol
✅ Space-saving DIN rail design for easy integration into stand

⚠️ Requires professional installation by a licensed electrician for safet
⚠️ Incorrectly set parameters can lead to frequent nuisance tripping or i

👤 Idéal pour : Suitable for those wanting automated protection and monitoring for three-phase electrical systems against grid instability.

🚫 Moins adapté à : Not intended for users without electrical expertise or for applications requiring certified billing-grade accuracy.

🔎 À vérifier avant d'acheter : Ensure the device's maximum current rating (Amps) matches or exceeds your main circuit breaker's capacity.

💰 Le prix est-il bon ? Around the usual market price — compare with the similar items below.

🚚 Livraison internationale — généralement 2 à 4 semaines avec numéro de suivi. Certains vendeurs proposent une livraison rapide payante.

⭐ Qualité et confiance — noté 4.6/5 sur la base de 28 achats réels, un signal de satisfaction authentique.

🔒 Paiement sécurisé — le paiement et l'achat se font sur AliExpress avec Protection des acheteurs et remboursement si l'article n'arrive jamais / n'est pas conforme.

💡 Avant d'acheter — sur la page produit, vérifiez les avis avec de vraies photos, le délai de livraison vers votre pays et les tailles/spécifications le cas échéant.

InstaShop est un catalogue qui renvoie vers AliExpress. L'achat, la livraison et la garantie relèvent uniquement du vendeur AliExpress ; certains liens sont des liens d'affiliation (le prix pour vous ne change pas). Conditions d'utilisation

🔍 Analyse approfondie

The TOMZN 3P+N three-phase monitor is a multifunctional DIN rail device designed to provide both real-time data and active protection for electrical systems. By combining a voltage and current meter with an integrated protection relay, it serves as a watchdog for your electrical cabinet. It is specifically built to handle three-phase setups with a neutral line, offering adjustable thresholds for over-voltage, under-voltage, and current limiting. This level of customization allows users to tailor the protection to the specific needs of their appliances or industrial machinery, preventing damage from unstable grid conditions.

While TOMZN is a familiar name in the budget electrical space, this specific model occupies a more specialized niche given its three-phase capabilities. With a respectable buyer rating and a modest number of orders, it presents as a practical solution for those looking to modernize their distribution board without the high costs associated with premium industrial brands. The inclusion of a digital display for each phase ensures that monitoring is straightforward and immediate, provided the unit is installed correctly within a standard DIN rail environment.

✅ Avantages

Consolidates multiple functions—monitoring, protection, and relay—into a single compact DIN rail unit.
Features highly adjustable parameters, allowing for precise control over when the protection should trigger.
The clear digital interface provides simultaneous visibility for voltage and current across three phases.
Cost-effective alternative for adding advanced protection to a distribution board compared to purchasing separate components.

⚠️ Attention

The order volume is relatively low, meaning there is less long-term reliability data from the community compared to high-volume items.
Installation carries significant risk and requires professional handling to ensure the relay functions correctly during a fault.

Who it's for: This device is intended for homeowners with three-phase power supplies or small-scale industrial operators who want to safeguard sensitive equipment from voltage fluctuations. It is ideal for those who have basic electrical knowledge or access to a professional electrician for installation.

Who should skip it: It is not suitable for users with a standard single-phase home setup or those without the technical expertise to configure electrical parameters. It should not be used in critical industrial environments without first confirming its compliance with local safety regulations.

🔎 Check before you buy

Confirm the maximum rated current (Amps) the unit can safely handle with the seller.
Verify the specific dimensions of the unit to ensure it fits your existing DIN rail spacing.
Ask the seller for the full range of adjustable settings for voltage and delay times.
Inquire about the presence of any specific safety certifications required by your local electrical code.

💰 Value verdict: At its current price point, this protector offers significant functional value. Given the positive buyer rating and the complexity of three-phase monitoring, the investment is fair. It provides a level of insurance for expensive downstream appliances that far exceeds its cost, provided the specifications meet your specific load requirements.

💡 Conseils

Always have a certified electrician perform the installation and torque the terminals correctly to prevent heat buildup.
Before finalizing your settings, research the safe operating voltage range for your specific appliances to avoid frequent nuisance tripping.
Double-check that your distribution box has enough 'modules' of space, as three-phase units are wider than standard breakers.

Questions about this product

Does this device also track total energy consumption (kWh)?

The product description focuses on voltage and current monitoring. You should message the seller to confirm if cumulative energy tracking is included in the firmware.

Can I use this on a system without a neutral wire?

This is a 3P+N model, which typically requires a neutral connection to function and monitor voltage correctly. Verify with the seller if they have a 3P-only version if your setup lacks a neutral.

What happens after a voltage spike is resolved?

Most adjustable protection relays have a configurable recovery time. You should check with the seller to see the minimum and maximum delay settings for automatic reconnection.

❓ Questions & réponses

Does it ship to my country?

Yes. The item ships worldwide via AliExpress, usually within 2–4 weeks, with a tracking number.

Are there customs or taxes?

Import duty/VAT depends on your country's rules and the order value. Any local charges are set by your customs authority, not by InstaShop.

How do I return an item if something is wrong?

Purchases are made on AliExpress with Buyer Protection — you can open a dispute and get a refund if the item never arrives or is not as described, typically within 15 days of delivery.

Is the price final?

The price shown is the product price on AliExpress. Shipping and any local import taxes (if applicable in your country) are separate.