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header-product Phase Loss and Phase Asymmetry Relay FF CZF-2B 10A 1NO 4s 55V with Contactor Contact Monitoring
31.49 €

Phase Loss and Phase Asymmetry Relay FF CZF-2B 10A 1NO 4s 55V with Contactor Contact Monitoring

Phase Loss Relay FF CZF-2B 10A 1NO 4s Photo 1
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Phase Loss and Phase Asymmetry Relay FF CZF-2B 10A 1NO 4s 55V with Contactor Contact Monitoring

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Phase Loss and Phase Asymmetry Relay FF CZF-2B 10A 1NO 4s 55V with Contactor Contact Monitoring

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Short description

FF CZF-2B is a phase loss and phase asymmetry protective relay designed to monitor three-phase power supply and control a contactor. Rated for 55 V operation, it features a 10 A switching capacity, one normally open (1NO) contact and a 4-second response/time setting. Typical uses include protection of motors and three-phase equipment from phase failure and imbalance, and automated contactor control.
Available for order: 57 pcs.
Warranty: 2 Years
SKU: 12111514
Manufacturer: FF
delivery
to the Customer Service Center at Kengaraga 2b, Riga
06.07.2026 {{selectedOffer.officeDeliveryString}}
free
Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
06.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
09.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
Parcel couriers
Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa
09.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Product information

Description

FF CZF-2B is a phase loss and phase asymmetry relay designed to monitor three-phase power supply and to control a contactor in industrial and commercial electrical installations. The relay operates at 55 V and provides a single normally open (1NO) switching contact with a rated switching capacity of 10 A. It detects phase loss and phase imbalance and reacts within an adjustable 4-second timing setting to isolate the load or trigger a connected contactor, helping to protect motors and three-phase equipment from damage due to incorrect phase conditions.

Advantages

The device combines phase loss and asymmetry detection with contactor control in a compact module suited for panel mounting. Its 10 A switching contact supports direct switching of control circuits while the 4 s response setting allows short delays to avoid nuisance trips during transient disturbances. The relay’s 55 V operating range makes it suitable for low-voltage three-phase systems where monitoring and automated disconnection are required to protect equipment.

Suitable for

  • Protection of three-phase motors against phase loss and phase imbalance
  • Monitoring and control of contactors in pump, fan and conveyor installations
  • Integration into control panels for small industrial machines and HVAC systems

Key specifications

  • Function: phase loss and phase asymmetry detection
  • Operating voltage: 55 V
  • Output: 1 normally open contact
  • Rated switching current: 10 A
  • Response/time setting: 4 seconds
  • Mounting: panel or DIN-rail compatible format (module form factor)

How to use

Install the relay in an appropriate control panel location and connect the three-phase supply and control wiring following the manufacturer's wiring diagram. Set the response time to the required 4 s delay if not fixed, and wire the relay contact to the contactor control circuit so that the relay opens or closes the control circuit when phase loss or asymmetry is detected. Perform functional checks by simulating phase loss or imbalance under safe conditions to confirm correct operation before placing the installation into normal service.

Usage recommendations

Use the relay in systems where the supply voltage matches the device rating. Regularly inspect wiring connections and test the relay operation during preventive maintenance intervals. Avoid exposing the relay to moisture, excessive vibration or temperatures outside the specified operating range to maintain reliable detection and contact operation.

FF CZF-2B — это реле контроля пропадания фазы и асимметрии фаз, предназначенное для наблюдения за трехфазным электроснабжением и управления контактором в промышленных и коммерческих электрических цепях. Реле рассчитано на работу при 55 В и оснащено одним нормально разомкнутым контактом (1NO) с максимально допустимым током переключения 10 А. Устройство фиксирует пропадание фазы и несоответствие фазовых напряжений, срабатывая с временной выдержкой 4 секунды для отключения нагрузки или управления контактором с целью защиты электродвигателей и трехфазного оборудования.

Преимущества

Реле объединяет функции обнаружения отсутствия фазы и асимметрии с управлением контактором, занимая небольшое пространство для установки в щитах управления. Контакт на 10 А позволяет напрямую переключать цепи управления, а выдержка времени 4 с снижает вероятность ложных срабатываний при кратковременных колебаниях. Рабочее напряжение 55 В делает устройство подходящим для низковольтных трехфазных систем, где требуется автоматическое отключение при нарушениях фаз.

Подходит для

  • Защиты трехфазных электродвигателей от пропадания фазы и фазовой асимметрии
  • Мониторинга и управления контакторами в насосных, вентиляторных и конвейерных системах
  • Встраивания в шкафы управления для небольших промышленных машин и систем ОВК

Ключевые характеристики

  • Функция: контроль пропадания фазы и асимметрии фаз
  • Рабочее напряжение: 55 В
  • Выход: 1 нормально разомкнутый контакт
  • Номинальный переключаемый ток: 10 А
  • Временная выдержка срабатывания: 4 секунды
  • Монтаж: формат для установки в щит/на DIN-рейку (модульный корпус)

Как использовать

Установите реле в подходящее место в щите управления и выполните подключение трехфазного питания и цепей управления в соответствии с электрической схемой производителя. При необходимости установите выдержку времени 4 с и подключите контакт реле к цепи управления контактором таким образом, чтобы при обнаружении пропадания фазы или асимметрии контакт размыкал или замыкал цепь управления. Проведите проверку работоспособности, моделируя пропадание фазы или несбалансированную нагрузку в безопасных условиях, прежде чем вводить систему в эксплуатацию.

Рекомендации по применению

Используйте реле в системах с соответствующим рабочим напряжением. Регулярно проверяйте и подтягивайте электрические соединения, а также тестируйте работу реле в рамках профилактического обслуживания. Избегайте воздействия влаги, сильных вибраций и температур вне допустимого диапазона для обеспечения надежной работы и точного обнаружения фазных нарушений.

FF CZF-2B ir relejs fāžu zuduma un fāžu asimetrijas uzraudzībai, paredzēts trīsfāzu barošanas uzraudzībai un kontaktora vadībai rūpnieciskās un komerciālās elektrosistēmās. Ierīce darbojas pie 55 V un nodrošina vienu normāli atvērtu kontaktu (1NO) ar pārslēgšanas strāvas jaudu 10 A. Relejs atklāj fāžu zudumu un asimetriju un reaģē ar 4 sekunžu laika iestatījumu, lai atslēgtu slodzi vai aktivizētu kontaktoru, tādējādi aizsargājot motorus un trīsfāzu iekārtas no bojājumiem, ko izraisa nepareizas fāžu attiecības.

Priekšrocības

Ierīce apvieno fāžu zuduma un asimetrijas detektēšanu ar kontaktora vadību kompakta moduļa formā, piemērota panelimontāžai. 10 A kontakts ļauj tieši pārslēgt vadības ķēdes, bet 4 s reakcijas laiks nodrošina nelielu aizkavi, lai izvairītos no nevēlamiem atslēgumiem pārejas traucējumu laikā. Darbības spriegums 55 V padara releju piemērotu zema sprieguma trīsfāzu sistēmām, kur nepieciešama uzraudzība un automātiska atslēgšana ierīču aizsardzībai.

Piemērots

  • Trīsfāzu motoru aizsardzībai pret fāžu zudumu un asimetriju
  • Kontaktorų uzraudzībai un vadībai sūkņu, ventilatoru un konveijeru sistēmās
  • Integrācijai vadības skapjos maziem rūpnieciskajiem mehānismiem un HVAC sistēmām

Galvenās specifikācijas

  • Funkcija: fāžu zuduma un fāžu asimetrijas noteikšana
  • Darbības spriegums: 55 V
  • Izvade: 1 normāli atvērts kontakts
  • Nominālā pārslēgšanas strāva: 10 A
  • Reakcijas/laika iestatījums: 4 sekundes
  • Montāža: paneļa vai DIN sliedes formāts (moduļa korpuss)

Kā lietot

Uzstādiet releju kontrolpaneļa piemērotā vietā un pieslēdziet trīsfāzu barošanu un vadības vadus saskaņā ar ražotāja shēmu. Ja nepieciešams, iestatiet 4 s aizkavi un pieslēdziet releja kontaktu kontaktora vadības ķēdei tā, lai fāžu zuduma vai asimetrijas gadījumā tiktu atslēgta vai aktivizēta vadības ķēde. Veiciet drošības pārbaudes, imitējot fāžu zudumu vai nelīdzsvarotību, lai pārliecinātos par pareizu darbību pirms pilnas ekspluatācijas uzsākšanas.

Lietošanas ieteikumi

Lietojiet releju sistēmās ar atbilstošu darba spriegumu. Regulāri pārbaudiet savienojumus un veiciet releja darbības testus profilaktiskās apkopes laikā. Neļaujiet ierīcei nonākt saskarē ar mitrumu, stiprām vibrācijām vai temperatūrām ārpus pieļaujamā diapazona, lai nodrošinātu uzticamu darbību un precīzu fāžu traucējumu noteikšanu.

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Customer questions

FAQ

How much does the Phase Loss Relay FF CZF-2B 10A 1NO 4s cost, and is it available for purchase?

The price is 31.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 57 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All FF products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized FF service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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