# Phase Failure and Asymmetry Relay FF CZF-310 10A 1P 4s 55V

**URL:** https://aio.lv/en/product--ff-czf-310--12115885
**Data updated:** 2026-03-20 17:55 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CZF-310
**EAN:** 5908312593126
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-czf-310--12115885

## 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-310 is a phase failure and asymmetry relay designed for single-pole protection of electrical installations. Rated for 10 A load and 55 V operating voltage, it features a 4-second delay for response to phase loss or imbalance. The device monitors phase presence and symmetry to protect motors and three-phase equipment from damage due to phase loss, reversal, or voltage asymmetry.

## Long description

FF CZF-310 is a phase failure and asymmetry relay designed for single-pole protection of electrical installations. Rated for a 10 A load and intended for operation at 55 V, the relay monitors phase presence and voltage symmetry with a built-in 4-second response delay. It detects phase loss, phase reversal and voltage imbalance to help prevent damage to motors and three-phase equipment by initiating a protective response when irregularities persist beyond the set delay.
Advantages
The device provides reliable single-pole monitoring with a clearly specified 10 A switching capacity and a 4 s delay to avoid nuisance trips caused by short transients. Its compact design supports straightforward integration into control circuits and its voltage monitoring at 55 V makes it suitable for lower-voltage three-phase systems. The relay offers clear functional protection against phase loss, reversal and asymmetry while requiring minimal adjustment during installation.
Suitable for
Protection of small motors and pump drives in three-phase systems
Monitoring and safeguarding distribution panels in industrial and commercial installations
Control circuits where detection of phase loss, reversal or imbalance is required
Applications with a 55 V control or monitoring voltage and up to 10 A switching load
Key specifications
Function: Phase failure and asymmetry detection
Configuration: Single-pole switching
Rated switching current: 10 A
Operating/control voltage: 55 V
Response delay: 4 seconds
Monitored conditions: Phase presence, phase reversal, voltage asymmetry
How to use
Install the relay within the control panel following standard electrical safety practices and the manufacturer's wiring diagram. Connect the monitored phase inputs and the single-pole switching output according to the system layout and ensure the control voltage is 55 V. Set up any required upstream protection (fuses or circuit breakers) sized for the 10 A switching capability. After wiring, perform functional tests by simulating phase loss and asymmetry while observing that the relay delays tripping for approximately 4 seconds before changing state.
Usage recommendations
To ensure reliable operation, use the relay in environments protected from excessive vibration, moisture and dust, and verify compatibility with the control-voltage source. Periodically test the device under controlled conditions and confirm that upstream protection devices match the relay's rated switching current. For installations with higher currents or different system voltages, select a relay sized appropriately for the electrical parameters of the equipment.

## FAQ

### How much does the Phase Failure Relay FF CZF-310 10A 1P cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 578 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

https://aio.lv/img/cache/product/12115885/67651042_large.webp