MIKRO MK1000A (01) PDF MANUAL

MIKRO MK1000A (01) PDF SUMMARY:

What do the LED indicators display?

The LED indicators display the status of the system.

---

What does “1 0 0 X X” mean on the LED indicator?

“1 0 0 X X” indicates a normal condition with no tripping.

---

What does “1 1 0 X X” mean on the LED indicator?

“1 1 0 X X” indicates that the low-set has been triggered, and the time delay countdown has started.

---

What does “1 0 1 X X” mean on the LED indicator?

“1 0 1 X X” indicates that the high-set has been triggered, and the time delay countdown has started.

---

What does “1 B 0 B B” mean on the LED indicator?

“1 B 0 B B” indicates that the low-set has tripped, the Function LED indicates the tripping source, and the Data LED shows the tripped value.

---

What does “1 0 B B B” mean on the LED indicator?

“1 0 B B B” indicates that the high-set has tripped, the Function LED indicates the tripping source, and the Data LED shows the tripped value.

---

What does “1 X X B 1” mean on the LED indicator?

“1 X X B 1” indicates the relay is in programming mode.

---

What does the “0 off” Function LED indicate?

“0 off” indicates Earth-fault current.

---

What does the “1 off” Function LED indicate?

“1 off” indicates L1 load current.

---

What does the “2 off” Function LED indicate?

“2 off” indicates L2 load current.

---

What does the “3 off” Function LED indicate?

“3 off” indicates L3 load current.

---

What does the “0 blink” Function LED indicate?

“0 blink” indicates previous earth-fault tripped current.

---

What does the “1 blink” Function LED indicate?

“1 blink” indicates previous L1 tripped current.

---

What does the “2 blink” Function LED indicate?

“2 blink” indicates previous L2 tripped current.

---

What does the “3 blink” Function LED indicate?

“3 blink” indicates previous L3 tripped current.

---

What does the “4 off” Function LED indicate?

“4 off” indicates overcurrent low-set current setting.

---

What does the “5 off” Function LED indicate?

“5 off” indicates overcurrent time multiplier/ delay setting.

---

What does the “6 off” Function LED indicate?

“6 off” indicates overcurrent high-set current setting.

---

What does the “7 off” Function LED indicate?

“7 off” indicates overcurrent high-set delay time setting.

---

What does the “8 off” Function LED indicate?

“8 off” indicates earth-fault low-set current setting.

---

What does the “9 off” Function LED indicate?

“9 off” indicates earth-fault time multiplier/ delay setting.

---

What does the “A off” Function LED indicate?

“A off” indicates earth-fault high-set current setting.

---

What does the “b off” Function LED indicate?

“b off” indicates earth-fault high-set delay time setting.

---

What does the “c off” Function LED indicate?

“c off” indicates soft switch setting.

---

How does the 4-digit display behave under normal operating conditions?

Under normal operating conditions, the 4-digit display is off.

---

How do you activate the 4-digit display?

Press the “RESET” key to light up the 4-digit display.

---

How long will the display stay on if no key is pressed?

The display will switch off automatically after 6 minutes if no further key is pressed.

---

How do you simulate a trip condition?

Press the “TEST” button to simulate a trip condition.

---

How do you reset the relay after it has tripped?

Press the “RESET” button to reset the relay when tripped.

---

How do you view the various functions?

When the relay is not under tripped condition, pressing the “RESET” button will scroll through the various functions.

---

What is the scroll sequence for viewing functions?

The scroll sequence is: ILn, I>, kt>, I>>, t>>, Soft SW1, IL1, IL2, IL3, ILn Record, IL1 Record, IL2 Record, IL3 Record, Io>, kto>, Io>>, to>>, Soft SW2, Soft SW3, Soft SW4, and Soft SW5.

---

How do you program the settings for I>, kt>, I>>, t>>, Io>, kto>, Io>>, to>>, soft SW1, soft SW2, soft SW3, soft SW4 and soft SW5?

• Step 1: Press the “RESET” key until the Function LED shows the required function.
• Step 2: Press the “UP” and “DOWN” keys simultaneously to enter programming mode. The Function LED blinks to indicate the relay is in programming mode.
• Step 3: Use the “UP” or “DOWN” key to select the desired value.
• Step 4: To save the selected value, press the “UP” and “DOWN” keys simultaneously again. It will exit the programming mode with the Data LED displaying the newly set value.

---

How do you exit programming mode without saving the selected setting?

Press the “RESET” key once to exit programming mode without saving the selected setting.

---

How do you set the overcurrent low-set setting from 5A(100%) to 6A(120%)?

• (i) Press “Reset” key until overcurrent low-set setting function. i.e. Function LED shows “4”. The Data LED shows the default setting is 5.00A.
• (ii) Press “Up” & “Down” keys simultaneously. The Function LED blinks to indicate the relay is in programming mode.
• (iii) Press “Up” key to alter the setting until the desired value is displayed. i.e. 6.00. The Data LED shows the set value increasing until it shows “6.00”.
• (iv) Press “Up” & "Down keys simultaneously to save the new value and exit programming mode. The Function LED stops blinking, and the DATA LED displays the new setting, i.e., 6.00.

---

How can the output contacts be programmed?

The output contacts can be programmed to be: linked to overcurrent trip signal, linked to earth-fault trip signal, or manual reset or auto reset type.

---

What is the behavior of auto reset contacts?

For auto reset type, the contact remains activated until the fault current is removed.

---

What is the behavior of manual reset contacts?

For manual reset type, the contact remains activated even with the removal of fault current. This contact can only be reset by pressing the “RESET” key.

---

How do you access the soft switch setting mode?

When the Function LED shows “c”, the relay is in “soft switch setting” mode.

---

How do you change contact R1 from auto reset to manual reset, when R1 is linked to overcurrent and earth-fault?

• (i) Press “Reset” key until soft switch 1 setting function. The Function LED shows “c”. The Switch number (SW) shows “1” and the Switch value (SVL) shows “03”.
• (ii) Press “Up” & “Down” keys simultaneously. The Function LED blinks, indicating the relay is in programming mode.
• (iii) Press “Up” key to alter the setting until the desired value is displayed. The Switch value (SVL) changed to “13”.
• (iv) Press “Up” & "Down keys simultaneously to save new value and exit programming mode. The Function LED stops blinking, and the Switch value(SVL) shows the new setting, i.e. “13”.

---

How do you change the overcurrent low-set IDMT characteristic from normal inverse 3/10 curve to long time inverse curve?

• (i) Press “Reset” key until soft switch 4 setting function. The Function LED shows “c”. The Switch number (SW) shows “4” and the Switch value (SVL) shows “00”.
• (ii) Press “Up” & “Down” keys simultaneously. The Function LED blinks, indicating the relay is in programming mode.
• (iii) Press “Up” key to alter the setting until desired value display. The Switch value (SVL) is changed to “02”.
• (iv) Press “Up” & "Down keys simultaneously to save new value and exit programming mode. The Function LED stops blinking, and the Switch value(SVL) shows the new setting, i.e. “02”.