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CKF-318 TRMS

Phase loss and phase 

sequence sensor 

The CKF-318 phase loss and phase sequence microprocessor 

sensor without neutral wire is designed to protect electric motor 

powered from the three-phase network in following cases:

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voltage loss in at least one phase;

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voltage drop in at least one phase below 320 V;

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voltage increase in at least one phase above 480 V;

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voltage asymmetry between phases above the set value;

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incorrect phase sequence.

The sensor correctly measures the true rms value of the 

voltage (TrueRMS), even when the power supply voltage 

is (disturbed) distorted.

Purpose

F&F Filipowski sp. j.

Konstantynowska 79/81, 95-200 Pabianice, POLAND

phone/fax (+48 42) 215 23 83 / (+48 42) 227 09 71

www.fif.com.pl; e-mail: [email protected]

Do not dispose of this device in the trash along with other waste! 

According to the Law on Waste, electro coming from households free of charge and can 

give any amount to up to that end point of collec� on, as well as to store the occasion of 

the purchase of new equipment (in accordance with the principle of old-for-new, regard-

less of brand). Electro thrown in the trash or abandoned in nature, pose a threat to the 

environment and human health.

Summary of Contents for CKF-318 TRMS

Page 1: ...true rms value of the voltage TrueRMS even when the power supply voltage is disturbed distorted Purpose F F Filipowski sp j Konstantynowska 79 81 95 200 Pabianice POLAND phone fax 48 42 215 23 83 48...

Page 2: ...ental shutdowns in case of temporary interferences in the power supply network If the voltage drops below 320 V or rises above 480 V the discon nection is carried out after 1 sec The countdown to shut...

Page 3: ...3 Front panel...

Page 4: ...current state of the output Asymmetry or exceeding of the voltage threshold Relay switched off voltage value of any of the phases below 150 V or above 280 V or asymmetry above the set value Incorrect...

Page 5: ...5 Voltage waveforms Legend T1 1 10 sec T2 1 60 sec...

Page 6: ...erminals of the device the relay will be switched off immediately The red LED will be on to indicate a phase sequence error When the correct phase sequence returns the relay will be switched on with a...

Page 7: ...1 Swap the 2 phases for example L2 with L3 12 Switch on the power supply the motor can be started 13 In any other case than those described in points 8 and 9 see the signaling table page 4 Wiring diag...

Page 8: ...t separated 2 NO NC maximum load current AC 1 2 6 A power supply control 2 LED minimum phase voltage 320 V maximum phase voltage 480 V voltage asymmetry of activation 20 80 V voltage hysteresis 5 V sw...

Page 9: ...nly with proof of purchase Contact your dealer or directly with us F F Filipowski sp j declares that the device is in conformity with the essential requirements of The Low Voltage Directive LVD 2014 3...

Page 10: ...ltage circuit breakers Before connecting the power supply make sure that all cables are connected correctly It is essential to observe the operating conditions of the sensor supply voltage humidity te...

Page 11: ......

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