Three-phase monitoring/protection relay for phase/asymmetry/voltage failure control

Barcode: FKT-06F

Regular price: €30,36 €25,09 excl. VAT
Regular price
Sale price: €30,36 €25,09 excl. VAT
Unit price: per

Low stock: 10 left

All items are in stock and shipped from the Czech Republic. Delivery takes 3–8 days.

Luge track: Yes Yes No

Product variants

Description
Payment methods
Warranty

Phase protection relay without neutral conductor - with asymmetry control and phase sequence control

The phase protection relay is designed to protect three-phase motors and other devices sensitive to voltage changes. It ensures safe operation even in an unstable network, monitoring phase asymmetry, controlling phase asymmetry, phase failure control, and in some models - correct phase sequence control.

The device operates without a neutral conductor, which allows it to be easily installed in industrial distribution systems.
Phase voltage control range: 240-500 V AC.

Application and operating principle

Connect the relay according to the attached diagram.
Set:
- Permissible asymmetry value (%)
- Fault delay (DT)
- Reset time (RT)
If the voltage is within the normal range and the asymmetry does not exceed the set limit, the relay switches on and the RELAY indicator lights up.
For versions with phase sequence control, the L1-L2-L3 sequence must also be correct.
If the voltage of any phase exceeds the asymmetry limit, the ASYM. (asymmetry) indicator lights up, and after the DT delay, the relay trips.
When the voltage returns to normal, the RT reset time counts down. The fault is then cleared and the relay reactivated.

Asymmetry calculation

The following formula is used to detect asymmetry:

Asymmetry = ((Max. voltage - Min. voltage) / Max. voltage) × 100 %.

Example:
((245 V - 200 V) / 245 V) × 100 = 18.3 %.

This value should be adjusted depending on the type of connected load.

Technical specifications

Parameter	Value
Operating voltage	3×380 V AC, 50/60 Hz
Nominal auxiliary voltage (FKM-05 / 05F model)	220 V AC, 50/60 Hz
Asymmetry range	5-25 %
Fault delay (DT) setting	0.1-20 s
Reset setting (RT)	0.1-20 s
Power consumption	< 6 VA
Operating temperature	-20 to +55 °C
Signalling	4× LED indication
Installation	DIN rail
Output contact	5 A / 250 VAC (resistive load)
Maximum altitude	< 2000 m
Maximum wire diameter	2.5 mm²
Weight	0.210 kg

Online payment by bank card – after placing the order, you will be redirected to the payment portal. You will receive payment confirmation in your email.

Cash payment upon delivery – you will pay the amount specified in the payment notice to the courier upon delivery.

Payment by bank transfer – a prepayment invoice (proforma) will be sent to your email address no later than the next business day, indicating the bank account number to which the payment should be made.

Payment by invoice – this option is available to cooperation partners who have a cooperation agreement with our company.

If you wish to use one of the last two payment methods, please contact our customer service specialist, who will provide instructions on receiving an invoice with or without VAT.

The electrical equipment we supply meets high-quality standards, comes with a 24-month warranty, and fully complies with all European Union requirements.

We also offer free delivery for orders over 100 EUR, as well as a flexible discount and promotion system. Our employees' technical knowledge and experience allow us to provide professional consultations and, if necessary, offer alternative electrical product solutions.