# Phase failure and phase asymmetry relay FF CKF-317 1P 10A 4 s 40–80 V

**URL:** https://aio.lv/en/product--ff-ckf-317--11263926
**Data updated:** 2026-03-20 09:48 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** CKF-317
**EAN:** 5908312593171
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 27.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 22.72 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-ckf-317--11263926

## 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-317 is a single-pole phase failure and phase asymmetry relay designed for supply protection and control. It monitors phase sequence, phase loss and voltage asymmetry within 40–80 V and trips a 10 A contact after a 4-second delay. Suited for motor and pump protection, control panels and industrial installations where phase monitoring prevents equipment damage and downtime.

## Long description

FF CKF-317 is a single-pole phase failure and phase asymmetry relay designed to monitor and protect low-voltage three-phase supplies within the 40–80 V range. The device detects incorrect phase sequence, phase loss and voltage asymmetry and, after a 4-second intentional delay, operates its 10 A output contact to disconnect the load. The compact relay is intended for installation in control panels and switchgear where automated phase monitoring reduces the risk of motor and equipment damage and helps avoid unplanned downtime.
Advantages
The relay provides reliable detection of phase sequence errors, single-phase failure and asymmetry in voltage between phases, with a defined response delay to avoid nuisance tripping during transient conditions. Its single-pole contact configuration and 10 A rating make it compatible with control circuits and direct switching of protection coils and relay inputs. The 40–80 V operating range is tailored to low-voltage systems, and the simple function set supports straightforward integration into existing control cabinets.
Suitable for
Protection of three-phase motors and pumps against phase loss and incorrect rotation
Control and monitoring circuits in industrial control panels and switchgear
Applications where low-voltage phase monitoring is required (40–80 V)
Systems needing automatic disconnection after a deliberate 4 s verification delay
Key specifications
Function: phase failure and phase asymmetry monitoring with phase sequence detection
Poles: single-pole (1P) switching contact
Contact rating: 10 A
Operating voltage range: 40–80 V
Response delay: 4 seconds (fixed)
Output: mechanical switching contact suitable for control circuits
How to use
Install the relay in the control panel according to local electrical codes and panel layout requirements, ensuring correct wiring of the three-phase inputs for phase sequence and voltage sensing. Connect the relay output to the control circuit or contactor coil that will be used to isolate the load. After applying supply voltage, the relay continuously monitors phase presence, sequence and asymmetry; if a fault condition persists beyond the 4 s delay, the relay will open its 10 A contact to disconnect the protected equipment.
Ieteikumi par lietošanu
Place the relay on a DIN rail or mounting location suitable for the panel, avoid locations with excessive vibration or moisture, and confirm that downstream devices are rated for interruption by a 10 A contact. For reliable protection, combine the relay with overload protection and proper motor starting controls where applicable.

## FAQ

### How much does the Phase relay FF CKF-317 1P 10A 4s cost, and is it available for purchase?

The price is 27.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 247 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/11263926/62186901_large.webp