Numerical Protection Relays

 

Numerical Protection Relays for Substations & Industrial Power Systems

Numerical protection relays are widely used in substations, MV switchgear and industrial power systems for feeder, transformer, motor, generator, line and busbar protection.

Many of these relays do much more than basic fault protection. Depending on the model, they may also handle breaker control, measurements, event recording and communication with SCADA or substation automation systems.

ARP IMPEX supplies numerical protection relays for new projects, switchgear panels, retrofit work and replacement of older installed relays.

If you already have the relay model, send us the complete ordering code, quantity and delivery country. That is usually the quickest way to get an accurate quotation.

Buyers looking for a numerical protection relay supplier in India, an MV protection relay supplier, or a source for ABB, Siemens and Schneider Electric protection relays can send us the complete model and ordering code for quotation.

Why the Full Ordering Code Matters for Numerical Relays

For numerical relays, the basic family name is often not enough.

Two relays with the same family name can have different auxiliary supplies, inputs, outputs, communication ports or hardware options.

For example, a request for only “REF615” or “7SJ82” may still leave several possible configurations.

For a faster quotation, send, Brand + complete model + full ordering code + quantity + destination country

If the relay is already installed, a clear nameplate photograph is very useful.

For project enquiries, you can also send the BOM, approved make list or consultant specification.

ABB Numerical Protection Relays

ABB’s Relion range is widely used for feeder, transformer, motor, generator, voltage, line and other protection applications.

Common ABB numerical relay requirements include:

• REF series for feeder protection
• REM series for motor protection
• RET series for transformer protection
• RED series for line differential protection
• REU series for voltage protection
• REG series for generator protection
• REX series for multifunction protection and control

We regularly receive enquiries for models such as REF615, REF620, REM615, RET615, RED615, REU615, REX615 and REX640.

If you are looking for an ABB Relion relay supplier in India, ABB numerical protection relay exporter, or replacement for an existing REF, REM, RET or RED relay, send us the full ABB ordering code.

For older ABB relays, the existing nameplate is often the best starting point.

Siemens SIPROTEC Numerical Protection Relays

Siemens SIPROTEC is another major protection relay range used in substations, utilities and industrial switchgear.

Typical enquiries include:

• 7SJ82 / 7SJ85 for feeder and overcurrent protection
• 7SK82 / 7SK85 for motor protection
• 7UT82 / 7UT85 / 7UT86 / 7UT87 for transformer and differential protection
• 7SX82 / 7SX85 for multifunction protection
• Other SIPROTEC models depending on the application

We supply Siemens SIPROTEC relays for new switchgear projects as well as replacement of older units already installed in substations and industrial panels.

If you need a Siemens SIPROTEC relay supplier in India, send the complete Siemens article number rather than only the model family.

Schneider Electric Numerical Protection Relays

Schneider Electric numerical protection requirements may involve PowerLogic, MiCOM or older installed protection ranges.

PowerLogic P3 and P5 are commonly used in medium-voltage protection applications, while many plants and substations still have MiCOM relays in service.

Typical enquiries may include:

• PowerLogic P3 protection relays
• PowerLogic P5 protection relays
• MiCOM feeder protection relays
• MiCOM motor protection relays
• MiCOM transformer protection relays
• Replacement of older Schneider or legacy protection relays

If you are looking for a Schneider Electric numerical protection relay supplier, PowerLogic relay quotation, or MiCOM replacement relay, send the full model/reference number and quantity.

Replacing an Older Numerical Protection Relay?

Older numerical relays often remain in service for many years, especially in switchgear and substations. When one fails, the original model may no longer be current or may have been replaced by a newer relay family.

For an existing installation, the relay nameplate and full ordering code are the best starting points. If available, also share the auxiliary supply, CT/VT ratio, communication protocol and details of the protected feeder, motor or transformer.

We regularly receive replacement enquiries for older ABB Relion, Siemens SIPROTEC, Reyrolle, Schneider Electric MiCOM, Sepam and VAMP relays.

Where the original model is no longer available, the requirement can be checked against the present relay range while keeping the existing protection application and panel arrangement in mind.

Numerical Protection Relays for New Panels & Retrofit Projects

Numerical relay requirements often come at two very different stages: during the design of new MV panels, or later when an older switchboard is being upgraded.

For new projects, the relay may already be specified by the consultant, EPC contractor or switchgear manufacturer. In that case, we can quote directly against the BOM, approved make list or complete relay reference.

Typical requirements include feeder, transformer, motor and generator protection panels, utility and industrial substations, MV switchgear, OEM switchboards and plant expansion projects.

Retrofit enquiries are usually different. The existing panel may be moving from electromechanical or older numerical relays to a newer digital protection platform, while the basic protection scheme remains in service.

For project quotations, a complete relay reference is always preferable to a broad description such as “numerical feeder relay”, especially where communication, I/O and auxiliary supply options are involved.

We handle numerical relay requirements for:

• Feeder protection panels
• Transformer protection panels
• Motor protection panels
• Generator protection
• MV switchgear
• Utility substations
• Industrial substations
• Retrofit projects
• EPC projects
• OEM switchgear requirements
• Plant maintenance and shutdown work

Numerical Protection Relay Supplier & Exporter from India

ARP IMPEX supplies numerical protection relays from India for switchgear companies, EPC contractors, utilities, industrial plants, electrical traders and maintenance teams.

We receive model-specific enquiries from the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Egypt, Israel, Jordan and Lebanon for substations, MV switchgear and industrial power systems.

Requirements also come from Kenya, Nigeria, Ghana, Tanzania, Senegal, Uganda, Zambia, South Africa, Morocco, Tunisia, Mauritius, Rwanda, Botswana, Namibia, Eswatini and Lesotho.

For European buyers, we quote exact ABB, Siemens and Schneider Electric relay models for Germany, the United Kingdom, France, Italy, the Netherlands, Spain, Belgium, Poland, the Czech Republic, Sweden, Denmark, Finland, Portugal, Hungary, Slovakia, Slovenia, Romania and Austria.

Asian and international enquiries are also handled for Singapore, Malaysia, Vietnam, Indonesia, Thailand, the Philippines, Bangladesh, Sri Lanka, Nepal, Japan, South Korea, the United States, Canada, Mexico, Brazil, Chile, Colombia, Peru, Panama, Australia and New Zealand.

For export enquiries, send us the complete relay model, quantity and delivery country.

Send Us Your Numerical Protection Relay Requirement

If the relay is already specified, share the complete model or ordering code, quantity and delivery country and we can quote against that reference.

For an existing installation, a clear nameplate photograph is often the best starting point. Auxiliary supply, CT/VT details and communication requirements can also help where the original relay configuration needs to be checked.

For new switchgear, EPC or retrofit projects, you can send the BOM, datasheet, approved make list or consultant specification along with the required quantities.

REQUEST A NUMERICAL PROTECTION RELAY QUOTE

 

Numerical Protection Relay FAQs

Which numerical protection relay brands do you supply?

We handle ABB Relion, Siemens SIPROTEC, Schneider Electric PowerLogic, MiCOM and other model-specific protection relay requirements.

Can you supply ABB REX615 and REX640?

Yes. We handle model-specific enquiries for ABB REX615, REX640 and other Relion protection relays.

Can you supply Siemens SIPROTEC relays?

Yes. We supply Siemens SIPROTEC requirements including feeder, motor, transformer and multifunction protection models.

Do you supply Schneider Electric PowerLogic and MiCOM relays?

Yes. We handle PowerLogic P3, P5 and model-specific MiCOM protection relay requirements for new projects and replacement jobs.

Can you help with an obsolete numerical relay?

Yes. Send the existing relay model, ordering code and a clear nameplate photo. If available, also share the auxiliary supply, CT/VT details and communication information.

Can I send a project BOM for quotation?

Yes. For switchgear, EPC and project requirements, you can send the BOM or approved relay list with quantities and delivery destination.