13/01/2026
Ohayou minna-san! 🤗
Shimatta! Bagong taon bagong alarm na naman! 😂
Situation:
ES1-1 WIRE BREAK Alarm.
Around new year's time, tumawag si 3E at ito daw ang alarm.
Preparatory for Troubleshooting:
Upon checking sa Electrical Diagrams, ang ES1 ay Emergency Stop Button to stop lahat ng Oil Pumps sa Engine Room.
At upon checking more on the Electrical Diagrams, si ES1-1 ay located sa Wheel House mas kilala natin as Bridge.
Chikushou!
Hindi pwedeng gawin habang tumatakbo ang barko. 😅
Troubleshooting No.1:
Ikemasu! 🏃♂️➡️
Chineck ko muna yung ES1-1 Button sa Bridge.
Kako baka maluwag lang yung EOL Resistor dahil ng higpitan ko nawala yung Alarm pero after 2 hours nanjan na uli siya.
Since darating ang Sabado kung saan kami ay maglelay-over pinaalam natin kay CE na itetest namin yung ES1-1 Button from Bridge on FWE Condition and with the Engineers present to reset the Shunt Tripped Circuit Breakers agad-agad to never cause black-out.
Dumating ang sabado at ginawa namin ito in actual at it triggered the shunt trips of all Oil Pumps in the Engine Room.
This confirms that there is no actual line break.
Kailangan dun naman sa pinuntahan ng ES1-1 Line na to ako pumunta.
Kaso nasaan siya?
Ang barkong nasakyan ko ay isang RO-RO Cargo Ship na nasa Forward Part ang Bridge at nasa Aft Part ang Engine Room.
The Diagram Says na nasa Emergency Switch Board itong connection pero pagpunta ko dun wala naman siya sa Emergency Generator Room where the ESB can be found.
Understanding the Electrical Diagram:
Sa mga conventional Electrical Diagrams, Emergency Stops are wired only with Normally Closed Push Buttons na pag pinindot nyo ay maka cut ang daloy ng electricity and you will never be able to run the circuit again unless i-reset mo ang Emergency Stop.
For safety reasons, iba ang wiring nito.
Ito yung madadaanan nyong topic nung nag-aaral pa lang tayo sa engineering na Protective Relaying.
Pero sa totoo lang wala talaga ako maalala dun sa topic na yun kundi yung topic lang.
Yamete kudasai! 😂
It is wired with a Normally open push button, locking type, paralleled with an End-of-Line Resistor.
Itong line na ito ay minomonitor ng isang relay na kung tawagin ay overvoltage or undervoltage relay.
Kapag nagbago ang status ng mga contacts ni overvoltage or undervoltage relay which is monitored by a Programable Logic Unit na may Discrete Input Circuit na ang output ay going to another PLC na may Discrete Output Circuit, itong si PLC na may DOC ang mag papailaw sa ES1-1 WIRE BREAK Alarm at magbabato sa Alarm Monitoring System sa ECR na may EMERGENCY STOP BREAKER ALARM at MSB COMMON FAILURE Alarm at magpapatrip sa mga Shunt Trip Releases ng CB ng mga Oil Pumps sa Engine Room.
Normally, kapag pinindot mo ang ES1-1 Button, doon lang siya dapat aalarma, pero sa pagkakataong ito ay hindi.
At umaalarma siya na hindi naman niya ipinapara ang mga Oil Pumps.
Upon delving more sa Electrical Diagrams, may relay for the Alarms, which is K217.2-A, at may iba pang Relay, which is K217.2, for Tripping The Shunt Releases to the CBs ng mga Oil Pumps.
Medyo maliwanag na si K217.2-A ang salarin.
Troubleshooting No. 2
Ikemasu! 🏃♂️➡️
Sa kakabukas ng lahat ng Panel, nahanap natin ang mga PLC na sinabi ko sa Main Switch Board Synchronization Panel.
At sa ilalim nito, which sa mga nasakyan ko na before na barko ay either blank or Bus Bars ang nakalagay, doon ko nakita ang lahat ng Alarm Relays connected in parallel.
Kapag may malaking load na gumagana maririnig mong biglang magkiclick si K217.2-A at aalarma na si ES1-1 WIRE BREAK.
Inadjust natin si Hysteresis Loop pataas dahil this will make the relay less sensitive to fluctuations pero kahit sinagad natin ay hindi umubra.
Chikushou! 😂
The Relay with problem is a Telemecanique RM4UA and it is not available onboard.
May mga katabi siyang Relays for alarms na napalitan na ng bagong model which is Schneider RM22UA22MR.
We checked the Data Sheet and it is a compatible replacement pala talaga.
I then checked the Inventory sa AMOS, which is our Electronic Preventive Maintenance System, at nakita ko na meron pa kaming 2 pieces nito.
At swerte naman meron nga spare physically. 😂
Double checked all connections at "yabai" talaga. 😱
If I will replace the problematic relay ay it will trigger all Wire Break Alarms, at kung sakaling maluwag ang connection niya kay K217.2, it could possibly send a signal to trip Oil Pumps.
So, ininform uli natin si CE at 2E na this coming Saturday, sa short lay-over namin ko titirahin.
Another Saturday came.
On Finished With Engine Condition, after nila magbunkering from first tanker barge, ini-adjust ko ang settings ng spare relay at ipinalit ko sa faulty relay.
It triggered all Wire Break Alarms, and Emergency Power Source Fail Alarm.
Luckily, The Emergency Power Source Fail Alarm was only an alarm at it did not trigger anything, except for another alarm in the AMS, pero the engineers are on alert naman if anything goes differently.😌
Pagkatapos palitan, the alarm never came back!
Sugoi deshou? 🤷♂️
Kimochi na naman si Senpai! ☺️
Ja Mata ash*ta ne! 🤗
Kiotsukete ne mga kouhai at senpais! 🙋♂️
