MKC-04-U69 - Uncategorized ENTES - Free user manual and instructions

Product Type	Power Factor Controller
Model	MKC-04-U69
Brand	ENTES
Measurement Input	3-phase voltage and current (up to 690V)
Power Supply	100-240V AC/DC, 50/60Hz
Display	Backlit LCD, 4 lines
Output Relays	4 relay outputs for capacitor bank switching
Communication	RS485 Modbus RTU
Protection Class	IP54 (front panel)
Operating Temperature	-10°C to +55°C
Dimensions (WxHxD)	144 x 144 x 80 mm
Weight	0.5 kg
Enclosure Material	ABS plastic, self-extinguishing
Standards	IEC 61000-6-2, IEC 61000-6-4
Installation Type	Panel mount, cutout 138x138 mm
Wiring	Screw terminals, 2.5 mm² max
Harmonic Analysis	Up to 31st harmonic
Target Power Factor	Adjustable from 0.8 inductive to 0.8 capacitive
Switching Delay	Adjustable from 1 to 999 seconds
Memory for Settings	EEPROM, retains data on power loss

Frequently Asked Questions - MKC-04-U69 ENTES

How do I install the ENTES MKC-04-U69 power factor controller?

Mount the device in a panel cutout of 138x138 mm. Connect the power supply (100-240V AC/DC) to terminals L and N. Connect voltage measurement inputs (L1, L2, L3) via fuses. Connect current transformers (CTs) to the appropriate terminals. Wire the relay outputs to the capacitor contactors. Refer to the wiring diagram in the manual for precise connections.

What is the default setting for the target power factor?

The default target power factor is 1.0 (unity). It can be adjusted in the settings menu between 0.8 inductive and 0.8 capacitive.

Can I use this controller with a single-phase system?

No, the MKC-04-U69 is designed for three-phase systems only. It requires all three phases for proper measurement and control.

How do I reset the device to factory settings?

Press and hold the 'Reset' button (located behind the front panel) for 5 seconds using a small screwdriver. Alternatively, go to the 'System' menu and select 'Factory Reset'. Confirm the action.

What does the 'Alarm' LED indicate?

The Alarm LED lights up when a fault condition is detected, such as over-voltage, under-voltage, over-current, or harmonic distortion exceeding set thresholds. Check the alarm log on the display for details.

How do I set the CT ratio?

Navigate to 'Setup' > 'CT Ratio'. Enter the primary current of your current transformer (e.g., 1000A for 1000/5A CT). The secondary is typically 5A or 1A depending on your CT. Ensure the ratio matches your installation.

Is it possible to view real-time power factor on the display?

Yes, the main screen shows the real-time power factor, along with voltage, current, and active/reactive power. Press the 'Up' or 'Down' keys to scroll through additional parameters.

What maintenance is required for the MKC-04-U69?

Regularly inspect the front panel for dust or moisture. Clean with a dry cloth. Check terminal connections yearly for tightness. No internal maintenance is required; the device is sealed.

Can I connect the controller to a PC via RS485?

Yes, use a USB-to-RS485 converter with appropriate software (e.g., Modbus Poll). The default baud rate is 9600, parity none. Refer to the Modbus map in the manual for register addresses.

How do I replace a blown fuse?

Disconnect all power sources. Open the front panel by releasing the clips. Locate the fuse holder on the power supply board. Replace with the same type: 2A, 250V, 5x20 mm fast-blow fuse. Close the panel and restore power.

USER MANUAL MKC-04-U69 ENTES

PHASE FAILURE RELAYS

MKC-04-U69/06-U69

Prc.	Asn.	On	Out	Meanings of the Device LEDs
○	○	●	●	Voltage(s) is(are) within limits
○	●	●	○	Voltage(s) is(are) out of limits
●	○	●	○	Phase Sequence Fault Warning
●	●	●	○	Phase Fault Warning
○	○	●	○	Unsufficient Supply Warning

●:LED ON

Q:LED OFF

①:Flashing

General

One of the common faults encountered in industrial plants is the overheating and the resulting damaging of the 3-phase motors due to the phase failure. Thermal-magnetic relay, which is an essential element in motor protection is generally too slow to assure demurrage without tripping due to both

its electromechanical structure and the use of high current setting range. MKC-06-U69 Motor Protection Relays which are designed to protect the desired equipment against phase failure for 690 V phase-phase voltages, asymmetry and phase sequence failure on 3 phase systems are manufactured to serve the following purposes.

Utilisation and Working Principle

By using the asymmetry adjustment knob(%asm.) on the front panel, the upper asymmetry limit of the system which will be protected is determined. If the unbalance on the system(asymmetry) exceeds the adjusted value, the device waits as long as the Delay-OFF time(Delay) and if the unbalance is still over the adjusted value, the relay of the device breaks contact(OUT LED turns off and Asm. LED turns on). If the unbalance on the system(asymmetry) falls under the adjusted value, the device waits as long as the Delay-ON time(Reset Delay) and if the unbalance is still under the adjusted value, the relay of the device makes contact(OUT LED turns on and Asm. LED turns off).

PROTECTION FEATURES :

1- Voltage Unbalance

(MKC-06-U69 - Can be Adjusted or Disabled)(MKC-04-U69 - Fixed %10)

Unbalanced voltage(asymmetry) may occur when;

The mains are loaded with unbalanced distribution,

One of the 3 phases of the motor has lost. In this case, some amount of voltage which is produced by other phases will be induced on the lost phase. Amount of this voltage depends on both the motor type and amount of load.

Output relay is making contact when a phase has been lost or an unbalanced Phase-Phase voltage value, which is occurred for any reason, is smaller than the user defined asymmetrical value. If this unbalanced voltage value exceeds the adjusted asymmetrical value(5-15%); output relay will break contact and switch off the motor at the end of adjusted time delay(0.1-20 sec.); relays LED on the front panel is turned off. Asymmetry error LED is turned ON. If the fault disappears within the delay time, the output relay will not break contact and will not switch off the motor.

In applications; a proper asymmetrical value should be adjusted considering the induced voltage value in two-phase which are remained after the other one has lost.

Example: On a 3 x 380 V network, switching value in case of 10% asymmetry

$$ \frac {(3 8 0 - \min)}{(\min + 3 8 0 + \min) / 3} \times 1 0 0 = \% 1 0 \quad \Rightarrow \quad \frac {3 8 0 - \min}{(3 8 0 + 2 ^ {*} \min)} = \frac {1}{3 0} \quad \Rightarrow \quad \min = 3 4 4. 3 V $$

Phase Sequence Fault Function Diagram

2- Phase Sequence Protection When the phase sequence is incorrect (L1, L2, L3 not in clockwise direction) the motor is not activated. If the sequence is changed by any reason, the output relay switches OFF immediately. Relay LED turns OFF, Phase Sequence error LED turns ON.

3-Lost Phase Fault

If the value for any of the phases drop down the lost phase limit value (160 V), Phs.Seq. - Asm. LEDs turn on simultaneously and the relay breaks contact without delay.

4- Insufficient Supply Voltage

If the average of Phase-Phase voltages falls below 160V, device creates insufficient supply voltage error (Asm. and Phs. Seq. LEDs start to blink one after the other) and the relay releases without any delay.

Precautions For Installation and Safe Use

Failure to follow those instructions will result in death or serious injury.

- Disconnect all power before working on equipment.

- When the device is connected to the network, do not remove the front panel.

- Do not try to clean the device with solvent or the like. Only clean the device with a dried cloth.

- Verify correct terminal connections before operation.

- Mount device to the panel.

- Electrical equipment should be serviced only by your compedent seller.

Connect a start /stop button as shown in the connection diagram.

A switch or circuit breaker can be used on the supply of the equipment.

Connection Diagrams

Dimensions (mm)

TECHNICAL PROPERTIES

Measurement and Supply Circuit
Supply Voltage (Un)	160-690 V AC
Supply Frequency	50/60 Hz.
Power Consumption (max.)	30 VA / 2 W (50 Hz.)
Measurement Method	True RMS
Settings
Asymmetry (asm. %)	MKC-06-U69 (5%...15% Can be disabled), MKC-04-U69 (10%)
Hysteresis	30% of the adjusted asymmetry value
Delay-Off(Delay)	0.1 ... 20 sec.
Delay-On(Reset Delay)	0.1 ... 20 sec.
Repetition Accuracy(Voltage)	± 0.5%
Repetition Accuracy(Time)	± 0.5%
Output
Output Type	1 Change-over(CO) Contact, 8A, 250V, 2000VA (Cosφ=1)
Electrical Life	10^5
Mechanical Life	10^7
Connection
Cable Cross-sections for Terminals	4 mm^2( 12AWG) stranded rigid cable 6 mm^2( 10AWG) solid conductor cable
Screw-On Force	0.5 Nm (4.5in.lbs)
Body
Installation	Inside the panel vertically or on to the rail
Material Type	Plastic Compliant with UL 94 VO
Protection Class	IP 20 (Terminals), IP 40 (Front Panel)
Dimensions	Type PK 28
Weight	100 gr.
Followed Standards
Impulse voltage resistance / rated value	6kV
Recorded real power	2W
Protection class IP	IP20
Electromagnetic compatibility	IEC 60947-1 / IEC 61000-6-2 / IEC 61000-6-4
Resistance against vibration / according to IEC 60068-2-6	1 ... 6 Hz: 15 mm, 6 ... 500 Hz: 2g
Resistance against shock / according to IEC 60068-2-27	sinusoidal half-wave 15g / 11 ms
Installation altitude / at a height over sea level / maximum	2000 m
Conductor-bound parasitic coupling BURST / according to IEC 61000-4-4	4 kV
Conductor-bound parasitic coupling conductor-earth SURGE / according to IEC 61000-4-5	4 kV
Electrostatic discharge / according to IEC 61000-4-2 Field-bound parasitic coupling /	6 kV contact discharge / 8 kV air discharge
according to IEC 61000-4-3 Insulation voltage / for overvoltage	10 V/m
category III according to IEC 60664 / with degree of pollution 3 / rated value	690V
Degree of pollution	2
Ambiant Conditions
Degree of pollution Ambient temperature	during operating °C -25 ... +60 during storage °C -40 ... +85 during transport °C -40 ... +85 <%90 (without condensation)
Relative Humidity Galvanic isolation	between entrance and outlet Yes between the outputs Yes between the voltage supply and other circuits Yes

No responsibility is assured by the manufacturer or any of its subsidiaries for any consequences arising out of the use of this material.

Note: The contact resistance at ohmic load (eg: Incandescent bulb, Resistance devices) is 8A. It is recommended to use a contactor if the inductive load eg: AC motor, fluorescent, etc.) or capacitive load (eg : Led Drivers, UPS, Fluorescent (Electronic Ballast), etc.) switch. Otherwise adhesion may occur in relay contacts.

MOTOR (FAZ) KORUMA RÖLESİ MKC-04-U69/06-U69