# FF phase loss and asymmetry relay CZF-B 10A 1NO 4s 55V

**URL:** https://aio.lv/en/product--ff-czf-b--12115886
**Data updated:** 2026-03-20 17:55 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CZF-B
**EAN:** 5908312593041
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 20.24 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-czf-b--12115886

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

FF CZF-B is a phase loss and phase asymmetry protection relay designed for monitoring three-phase supplies. It features a single normally open contact (1NO), rated switching current 10 A, operating delay 4 seconds and a nominal voltage parameter 55 V. Suitable for protecting motors and equipment from phase loss, phase reversal or imbalance in industrial and building electrical installations.

## Long description

FF CZF-B is a phase loss and phase asymmetry protection relay designed to monitor three-phase electrical supplies. It detects phase loss, phase reversal and phase imbalance to prevent damage to motors and other three-phase equipment. The device provides a single normally open contact with a rated switching current suitable for control circuits and protection applications. The relay is intended for installation in industrial control panels and building electrical installations where reliable phase supervision is required.
Advantages
The relay offers continuous monitoring of three-phase supplies with a clear, simple contact output that integrates with existing control systems. Its 10 A rated switching current supports common auxiliary and control loads, while the fixed operating delay helps avoid nuisance trips caused by short disturbances. The compact design and straightforward wiring make the unit practical for retrofit and new installations.
Suitable for
Protection of three-phase motors against phase loss and imbalance
Supervision of supply integrity in HVAC, pumps and compressors
Integration into motor starters and control panels
Building electrical distribution where phase monitoring is required
Key specifications
Protection functions: phase loss, phase asymmetry, phase reversal detection
Contact configuration: 1 normally open (1NO)
Rated switching current: 10 A
Operating delay: 4 seconds
Nominal operating voltage: 55 V
Intended supply type: three-phase systems
Mounting: panel/rail suitable for control enclosures
How to use
Install the relay in the control panel according to local electrical codes and the wiring diagram provided by the manufacturer. Connect the three-phase supply lines to the appropriate input terminals and wire the single normally open contact into the control circuit that will stop or isolate the protected equipment in the event of a fault. Verify that the nominal voltage and system type match the relay specifications before commissioning. After power-up, test the function by simulating phase loss or imbalance and confirm that the relay operates after the specified operating delay.
Usage recommendations
Use the relay as part of a coordinated protection scheme: combine it with appropriate overcurrent, thermal and short-circuit protection devices and follow manufacturer guidelines for wiring, grounding and environmental conditions. Regularly inspect connections and test the relay operation during maintenance to ensure reliable protection of motors and three-phase equipment.

## FAQ

### How much does the FF CZF-B phase loss and asymmetry relay cost, and is it available for purchase?

The price is 24.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 153 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. More information about warranty service: https://aio.lv/en/warranty

## Image

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