Nissi Engineering Solution Pvt. Ltd.

Ambattur, Chennai, Tamil Nadu

NISSI specialize in the testing and commissioning of switchgear and switchyard equipment.

We specialize in the testing and commissioning of GIS up to 400kV and AIS up to 765kV voltage levels. Our expertise extends to both High Tension (HT) and Low Tension (LT) equipment, ensuring optimal performance and compliance with industry standards.

The process begins with precondition checks, including a thorough visual inspection to ensure the electrical installation is correctly executed. We also verify the system design to confirm compliance with specifications.

Once verification is complete, we proceed with equipment testing as per approved protocols. This includes:

Functional testing to validate the operational characteristics of electrical equipment.

Operational checks to ensure the system functions as intended.

Following individual equipment testing, we conduct integration testing to confirm interoperability and seamless coordination within the system.

During the commissioning phase, we perform final inspections to verify that all equipment meets the required specifications.

Comprehensive documentation is prepared, including test reports, certifications, and manuals for future reference.

Scope of Testing & Commissioning:

Switchgear & Substation Equipment:

Isolators, disconnectors 

Circuit Breakers

Current Transformers (CT),  

Capacitor Voltage Transformers (CVT)

Power Transformers

Busbar Systems

Surge arrester

Reactors 

Auxiliary & Protection Systems:

DC Systems

Earthing Systems

We specialize in the testing of Numerical Main Protection relays , Auxiliary relays and Control & Relay Panels (CRP) to ensure seamless functionality and integration within electrical systems. The process begins with functional testing of relays, verifying their response under various fault conditions.

This is followed by functional and scheme verification of panels, ensuring all components are properly integrated. We also carry out pre-commissioning and commissioning of panels to validate system readiness.

i)Retrofit & Revamping Solutions

We offer specialized retrofit solutions for substations, focusing on upgrading outdated systems with modern technology.

Replacement of old panels and relays with advanced systems.

Expertise in reverse engineering, enabling the creation of new retrofit schemes even when old conventional systems lack documented schemes.

Implementation of new retrofit schemes based on existing ferrules and connections.

As-built drawing modifications to reflect the updated system.

ii)Testing Activities:

BOM verification and panel scheme checking

Configuration & testing of numerical relays

Functional checks for panel pre-commissioning

Final commissioning of panels

iii)Retrofit Solutions:

Upgrading protection schemes for the proposed device

Dismantling of existing devices/panels and mounting new equipment with required accessories

 Retrofit scheme verification and device configuration

 Testing & commissioning of retrofitted devices

iv)Retrofit Devices:

Control & Relay Panels

 Numerical Relays, Bay Control Units (BCU) & BCPU

Disturbance Recorders

Event Loggers

LV Breakers

v)Following OEM make relays have been configured, Tested and commissioned

M/s GE make Relays 

Micom Family-P141, P142, P143, P145, P14D, P14N, P241, P242, P243, P342, P343, P345, P346, P441, P442, P443, P444, P445, P446, P44T, P543, P545, P546, P642, P643, P645, P741, P742, P743, P746, P747, P841, P941, P942, P943

Multilin Family-B90, L90, D60, T60, M60, G60, F60, C60, G30, B30, D30, L30, P14D, P14N, P94V, 850, 889, 859, 845, F650, C650

M/s Siemens make Relays – 

Siprotec 4 Series & Siprotec 5 series Relays : 7SJ63, 7SJ64, 7SJ66, 7SJ68, 7SJ80, 7SJ81, 7RW60, 7RW80, 6MD63, 6MD66, 7SA51, 7SA52, 7SA61, 7SA63, 7SA64, 7SD51, 7SD52, 7SD53, 7SD60, 7SD61, 7SK52, 7SK80, 7SK81, 7UT51, 7UT61, 7UT63, 7SK80, 7SK81, 7UM51, 7UM61, 7UM62, 7SS52, 7VK51, 7VK61, 6MD61, 6MD63, 6MD66, 6MU80, 7VE61, 7VE63, 7SJ81, 7SJ82, 7SJ85, 7SJ86, 7SA82, 7SA86, 7SA87, 7SD82, 7SD86, 7SD87, 7SL82, 7SL86, 7SL87, 6MD85, 6MD86, 7VK87, 7UT82, 7UT85, 7UT86, 7UT87, 7UM85, 7SK82, 7SK85, 7SS85, 6MU85, 7KE85, 7VE85, 7SR10, 7SR11, 7SR12, 7SR21, 7SR22, 7SR45, 7SR46, 7SR51, 7SR18, 7SR24, 7SR54, 7SR23, 7SR15

M/s Schneider electric make Relays 

Micom Family-P141, P142, P143, P145, P241, P242, P243, P342, P343, P345, P346, P441, P442, P443, P444, P445, P446, P543, P545, P546, P642, P643, P645, P741, P742, P743, P746, P841, P847, P941, P942, P943, P3U30, P3U20, P3U10, P3F30, P3L30, P3M30, P3M32, P3T32, P3G30, P3G32, P5U20, P5V20, P5F30, P5M30, P5T30, P5L30, P122, P123, P127, P139, P437, P633, P632 & Vamp family Relays series

M/sHitachi Energy / M/s ABB make Relays

REB670, REG670, REC670, REL670, RET670, RED670, RES670, REF650, REB650, REG650, REC650, REL650, RET650, RED650, REB500, REF630, REG630, REM630, RET630, REF620, REM620, RET620, REF615, REC615, RED615, REM615, REF615, REV615 

Our expertise ensures efficient testing, commissioning, and retrofitting to enhance system reliability and performance.

PLCC (Power Line Carrier Communication) and FOTE (Fiber Optic Transmission Equipment) testing are essential processes in ensuring the reliability and efficiency of communication systems in electrical networks.

PLCC testing involves evaluating the communication capabilities of power line carrier systems, which utilize existing power lines to transmit data. This testing ensures that the signals are transmitted without significant interference and that the system can effectively communicate operational data, such as protective relay information and control commands, across the power grid.

On the other hand, FOTE testing focuses on fiber optic transmission systems, which are critical for high-speed data transfer over long distances. This testing assesses the integrity and performance of fiber optic cables, connectors, and associated equipment. Key parameters such as signal loss, bandwidth, and latency are measured to ensure optimal performance and compliance with industry standards.

Both PLCC and FOTE testing are vital for maintaining robust communication links in power systems, facilitating real-time monitoring, control, and data exchange that enhance the overall reliability and efficiency of electrical networks.

Activities Involved:

Installation & Commissioning of PLCC equipment

Installation of FODB & LIU

FO splicing & OTDR testing

4-wire E&M and 2wire hotline - Transmitting the Voice

E1 configuration & integration

Data integration between RTU / Gateway & control center

Integrating tele protection signals

NMS commissioning

Equipment:

Wave trap Analog & Digital PLCC

PDH & SDH equipment's

EPABX Analog & Digital Protection Couplers

Electrical modern testing kits are essential tools for ensuring the safety, efficiency, and reliability of electrical systems. These kits are equipped with advanced technologies that allow for comprehensive testing and diagnostics of various electrical components, including circuit breakers, transformers, and wiring systems.

Features such as insulation resistance testing, power quality analysis, and circuit continuity checks enable technicians to identify potential issues before they escalate into serious problems. Many modern testing kits also include digital interfaces and data logging capabilities, facilitating real-time monitoring and analysis of electrical parameters.

This data can be crucial for maintenance planning and regulatory compliance. By utilizing these sophisticated testing tools, electrical professionals can enhance system performance, prolong equipment lifespan, and ensure compliance with safety standards, ultimately contributing to more reliable and efficient electrical infrastructure

Primary:

CPC 100 with Current Booster up to 2000A - OMICRON TAN Delta - OMICRON

CT Analyzer - OMICRON

TESTRANO 600 - OMICRON

DCRM (ULTIMA 6 CHANNEL) - SCOPE

DCRM (CBA 3000) - ISA

Sweep Frequency Response Analyser (SFRA)- ISA High potential Testing kit (HI pot)

Breaker Timer-CRM kit

Winding resistance kit Soil resistivity

Earth resistance meter

Secondary:

OMICRON CMC 356 - 3PH Secondary injection kit

MEGGER SMRT46 - 3PH Secondary injection kit

PONOVO PW636i - 3PH Secondary injection kit

SVERKER - 1PH secondary injection kit

LVS Equipment's:

ETU - Sentron 3WL ACB testkit

SIEMENS - TD-500 MCCB testkit

Data Centre Special Equipment's:

Power Quality Analyzer FLUKE 1775, DRANTEZ HDPQ VISA PLUS

Thermal Imaging Camera FLUKE-TIX480, FLIR-E76

Digital Sound Meter EXTECH-(407730-ND)

Vibration Meter EXTECH-(SDL-800-ND)

Lux Level Meter EXTECH-(HD450-ND)

Electrical Installation Tester(Loop Impedance) FLUKE 1664 FC