internship day 21

8/20/2019 Internship Day 21

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De La Salle University – DasmariñasCollege of Engineering, Architecture & Technology

Electrical Engineering DepartmentDasmariñas DBB-B, Dasmariñas, Cavite, Philippines

DAILY ACTIVITY REPORT

Name of Student: Onofre E. Algara Jr.

Section: EEE41Name of Practicum

Coordinator:Engr. Anthony O. Lopos

Name of Company: National Grid Corporation of the

Philippines – Biñan Substation

Assigned to: Substation Operation and Maintenance

Control Number: 2014 – 943

Date: May 13, 2014

Location: Substation Control Room

Time IN: 8:00 AM

Time OUT: 5:00 PMSpent: 8 hours

Good evening Engr. Lopos:

Today was twenty – first day of my internship training at NGCP – Biñan Substation. I was

able to finish the 8 hours from 800AM - 500PM with a break of 1 hour. Today, the

substation was still on normal operation during my duty hours even though thecapacitor bank 2 was still shutted down because of the unbalanced phase current

making the circuit breaker connected to it to trip, this condition started last April 27 and

it was still under repair. Also, capacitor bank 1 has the same condition as to capacitor

bank 2, shutted down. Last Saturday, the switchyard circuit breaker tripped and its root

cause was still under observance that is why there is a re testing again of the both

capacitor banks a while ago. But then again, I was tasked to monitor different quantities

on each switchyard equipment so that the maintenance of the good harmony of

operation would be preserved.

At 1000 H, Engr. Oprecio instructed me to accomplished the Maintenance Tagging

Request, Work Permit and the Toolbox Meeting for the caution tags of the re – testing of

capacitor bank 1 and capacitor bank 2. After accomplising such work, I assissted the

team who will do the job. The photo documentation follows:





Maintenance Tagging Request for Re – Testing of Capacitor Bank 1 and Capacitor

Bank 2





Working Permit for Re – Testing of Capacitor Bank 1 and Capacitor Bank 2





Toolbox Meeting for Re – Testing of Capacitor Bank 1 and Capacitor Bank 2





Caution Tag for Checking of Re – Testing of Capacitor Bank 1

Caution Tag for Checking of Re – Testing of Capacitor Bank 2





Assistance on Capacitor Banks 1 & 2 Re – Testing





Capacitor Bank 1 (Above) & Capacitor Bank 2 (Below)





Transmission Assets Page 1





At 1400 H, I accompanied Engr. Kabamalan on the inventory of different switchyard

equipment and transmission assets such as post insulators, old kind differential relay,

transmission line, switchyard circuit breakers and switchyard lightning arresters and

different gun tri structures. We ere both instructed by the Principal Engineer of our

substation, Engr. Arnold Mendoza.

Every hour, I was assigned to read the following quantities:

a. Voltage, power and phase currents of:

1. 500 kVA T2 Station Service Transformer (NEW CNTRL)

2. 500 kVA T3 Station Service Transformer (SLOM)

b. Voltage and current of:

1. 125 Vdc Battery Charger (1 and 2)

2. 48 Vdc Battery Charger

c. Primary, Secondary and Tertiary Winding Temperature

1. 300 MVA Power Transformer No.1



d. Oil Temperature and Oil Level




e. Gas Circuit Breaker SF6 Pressure (every 1100 H and 1400 H)

1. 27 Switchyard Circuit Breakers

2. Capacitor Bank 1

3. Capacitor Bank 2

f. GCB counter and Lightning Arrester Counter (every 1100 H)

1.

Capacitor Bank 1

2. Capacitor Bank 2

That’s all for today. Good night Sir.

internship day 21

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