About Us

Rafflesia Technology is an Employee-Owned Company and we strive to create value for our clients and employees alike.

Uniqueness of this plant symbolize our business.

One that merge innovative solution, quality, economy, environment stewardess and joy of realizing tomorrow's dream today for our business partners.

Business Segments

At the heart of these business sectors are our in-depth multi-discipline system modelling, simulation, studies and multi sector design and engineering capabilities.

Innovative Solutions in Power Systems

Railway System Modeling, Simulation, Design & Engineering for Power Systems (AD and DC)

OCS

TPS

Traction Power System (AC & DC)

Over Head Catenary System

• Traction System Modelling and Simulation for normal / degraded and emergency modes of operation. (Load flow, short-circuit, voltage and temperature profile, regenerative recuperation and etc.)

• Power quality study (power factor, harmonics, voltage unbalance, voltage sag, transients, flicker and etc.)

• Wind and solar irradiance study for OCS

• Dynamic analysis of pantograph-OCS system

• Dynamic studies for OCS structures design on bridges.

• Sizing of traction power system (AC/DC)

• Cable sizing and cable & cable containment design

• Protection coordination study

• Lightning and surge protection

• Earthing and bonding, induce voltage, step and touch voltage

• EMI/EMC

• Detail design of AC/DC traction power systems and OCS

• Selection, sizing and positioning of regenerative recuperation technology (AARU, TERS, TESS)

The highest OPEX for railway operators is energy cost. An efficient traction power system design is paramount to ensure overall efficiency.

We undertake design for Metro and Mainline

We carry out in-depth system modelling and simulation for the design of traction power and overhead catenary system with safety, reliability, maintainability, ease of operation and energy efficiency in mind.

Energy Efficiency in Railway Sector

Railway System Energy Optimization

2050

> 70%

Passenger lines electrified

Railway Sector to decarbonize

Railway sector consume significant amount of energy due to its high traffic volume and frequency. Energy efficiency in this sector is paramount and contributes towards faster decarbonization goal.

We assist existing fleets and new projects in carrying out energy optimization studies and solutions.

The true "green energy" is the energy that is saved

Efficient Constructions Management is key to Success

In the environment of fast-track projects and with strict regulatory requirements, efficient project and construction management is key to the project success

Testing and Commissioning

Expertise in overseeing projects from inception to completion, ensuring timely and efficient delivery. We assist clients in planning, preparation of testing and commissioning procedures for PAT, SAT, IFT, SIT, Reliability Run and Trail Run.

We provide training for operation and maintenance crew and supports in formulating a comprehensive operation and maintenance documentation.

Construction Management

We assist clients in risk identification, management and mitigation throughout the lifecycle of the project. We support the client in effective change management that often derail smooth execution of the project

Our construction planning is based on in-depth 5S planning method that ensures all pre-requisite for construction and other requirements are in place prior to the constructability gate review and start of construction.

Backed by many years of experience in managing and constructing various type of system projects for railway sector, we are poised to be your ideal partner.

Expert Engineering Solutions for Power Generation

Combine extensive experiences of our pool of engineers in deployment of power plant instrumentation, control and automation system for thermal, combine cycle, WtE and hydro plants.

Electrical Systems

Deployment of generator excitation, protection and synchronizing systems. We provide design and sourcing support for plant electrical balance of plant and interconnecting facility

Performance Improvement

Energy efficiency and plant optimization is in the heart of our solutions. We provide plant optimization solution and operator training simulator.

Control System and Turbine Governors

We undertaken instrumentation and automation projects for greenfield and brownfield for thermal, combine cycle, biomass, hydro and waste to energy plants.

Electrical Grid is changing with emergence of Microgrids

The landscape of traditional power system structure where power is generated remotely and transmitted over the long-distance interconnected transmission grid to the consumers is changing.

System modelling, design and engineering

We conduct technical and economical feasibility of microgrid deployments. (Technical and financial). We carry out design and engineering of the full spectrum of microgrid ( process, electrical and automation)

Distribution network is being rapidly transformed into a self-sustaining microgrid capable of supplying its own load with utility as standby

AIRPORT

SEAPORT

RAILWAYS

CAMPUS

INDISTRIAL COMPLEX

SMART CITIES

MIX DEVELOPMET

We pride in being able to carry out in-depth design to cater for every situation depending of the drives

The Team

• Backed by a team with 20 - 30 year of experience in power systems planning and design in MNC and Local Organization.

• Area of expertise includes railway electrification (Mainline and metro) and power generation instrumentation, control and automation.

• Field of expertise includes project management, multi-discipline system modelling and simulation, design and engineering, testing and commissioning and operation and maintenance.

• Passionate in formulation of high technology and innovation solution with the goal that every solution is a “master-piece”.

The Directors

Backed by extensive domain knowledge the directors provide oversight to the management team

is a seasoned electrical engineer who graduated from the University of Malaya in 1994 and earned a master’s in Engineering from the University of Bath in grid system stability. He spent 20 years at ABB in various international roles—from design and commissioning to senior management—ultimately serving as Vice President of ABB Malaysia for Power Systems and Products. In 2014, he became CEO of PESTECH International, leading rail electrification and power generation until retirement in February 2025. He is also an active member of IEEE, IEM, and BEM, serves on the Industrial Advisory Panel at the University of Malaya, and is a founding member of the Malaysian Rail Industry Consortium.

Paismanathan Govindasamy

Ooi Ban Juan

earned a First-Class degree in Electrical and Electronics Engineering from the University of Malaya in 2012 and later an MBA from KEDGE. He began his career at ABB as an instrumentation, control, and automation engineer for various power plants, then joined PESTECH Technology Sdn Bhd, where he advanced from Lead Engineer to Principal Engineer and built a renowned team in power system modelling, simulation, and traction design—leading multiple complex projects until his retirement in March 2025. He holds several professional memberships (PEng, PTech, MIEM, CPEng, A.C.P.E., CEng) and serves as the alternate on the Industrial Advisory Panel for the University of Malaya’s Electrical & Electronics Engineering Department.