# FF phase failure and phase asymmetry relay CKF-316 10A 1P 4s 55V

**URL:** https://aio.lv/en/product--ff-ckf-316--12115786
**Data updated:** 2026-03-20 10:08 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-316
**EAN:** 5908312593164
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 25.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 21.48 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-316--12115786

## 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 CKF-316 is a single-pole (1P) phase failure and phase asymmetry protective relay rated for 10 A and a control voltage of 55 V. It monitors phase presence and symmetry, trips on phase loss or imbalance, and provides a 4-second delay before activation. Suitable for motor and three-phase equipment protection in industrial and commercial electrical installations.

## Long description

FF CKF-316 is a single-pole phase failure and phase asymmetry relay designed to protect motors and three-phase equipment in industrial and commercial electrical installations. Rated for 10 A with a control voltage of 55 V, the relay continuously monitors phase presence and balance, detecting phase loss and unacceptable phase asymmetry. A built-in 4-second delay prevents nuisance tripping during brief disturbances, allowing stable operation while still providing reliable protection against sustained faults.
Advantages
The relay combines phase failure detection and phase asymmetry monitoring in a compact single-pole unit, offering straightforward installation and integration into control circuits. Its 10 A current rating suits direct control of many contactors or signaling devices, while the 4-second operating delay reduces false trips caused by transient voltage fluctuations. The 55 V control voltage allows compatibility with control systems that use low-voltage DC or specialized AC supplies.
Suitable for
Protection of three-phase motors against phase loss and imbalance
Monitoring of supply symmetry in industrial machinery and HVAC systems
Integration with contactors and motor starters in control panels
Commercial electrical installations where phase monitoring is required
Key specifications
Protection functions: phase failure detection and phase asymmetry monitoring
Poles: single-pole (1P)
Current rating: 10 A
Control voltage: 55 V
Response delay: 4 seconds
Application: designed for monitoring three-phase supply and protecting motors/equipment
How to use
Install the relay in the control panel following standard wiring practices for protective relays, ensuring correct connection to the three-phase supply and to the control circuit at 55 V. Configure the relay as part of the motor starter or protection chain so that it can interrupt the control circuit or send a trip signal when phase loss or asymmetry is detected. The built-in 4-second delay is automatic; no external timing adjustments are required. Verify wiring and functionality by performing an acceptance test that simulates phase loss and verifies the relay trips after the specified delay.
Usage recommendations
Use the relay together with appropriately rated contactors or breakers and ensure control wiring matches the relay's 55 V requirement. Periodically inspect electrical connections and test the phase monitoring function during maintenance intervals to ensure reliable operation. Avoid exposure to harmful environmental conditions beyond the relay's intended installation environment.

## FAQ

### How much does the FF CKF-316 phase failure/asymmetry relay 10A 1P cost, and is it available for purchase?

The price is 25.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 752 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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