ABB SPAD 346 C Stabilised Differential Protection Relay

ABB SPAD 346 C Stabilised Differential Protection Relay Supplier and Exporter in India

ABB SPAD 346 C Replacement – REX615 Retrofit

ABB SPAD 346 C is a legacy transformer differential protection relay. ABB lists the model as not active since 2012, so most current requirements are for replacement of an installed relay, shutdown spares, maintenance stock or modernisation of an existing transformer protection panel.

ABB officially includes SPAD 346 C in its SPACOM-to-REX615 Relay Retrofit Program. The retrofit package includes a REX615 relay with a retrofit connector kit and documentation. ABB states that the program is intended to reduce major new wiring and shorten shutdown time during replacement.

For an ABB SPAD 346 C replacement or REX615 retrofit enquiry, please send:

• Complete ABB SPAD 346 C order code
• Clear photograph of the existing relay nameplate
• Required quantity
• Destination country
• Required delivery schedule

For a retrofit requirement, transformer rating, CT ratios and existing relay settings can also be shared if available.

ARP IMPEX handles enquiries for ABB SPAD 346 C replacement relays, discontinued ABB SPACOM transformer relays and SPAD 346 C to REX615 retrofit requirements for international buyers.

Description

ARP IMPEX supplies and exports ABB SPAD 346 C stabilised differential protection relays for existing substations, transformer panels, power plants and industrial maintenance requirements.

SPAD 346 C was developed mainly for the protection of two-winding power transformers and generator-transformer units. It combines transformer differential protection, overcurrent protection and earth-fault protection in one relay.

The relay is used to detect faults such as transformer winding short circuits, interturn faults and earth faults. It can also be applied to certain three-winding transformers where the system arrangement meets ABB’s application conditions.

For today’s buyer, however, the main issue is usually not selecting SPAD 346 C for a new project. Most enquiries come from plants where the relay is already installed, and an exact replacement, standby spare or modern retrofit is required.

If you are looking for an ABB SPAD 346 C supplier in India, SPAD 346 C price, discontinued SPAD 346 C availability, transformer differential relay spare or SPAD 346 C replacement with REX615, send us the existing relay part code or nameplate.

Request a Quote for ABB SPAD 346 C

For a quick commercial offer, please send:

• ABB SPAD 346 C complete order code
• Clear nameplate photograph
• Required quantity
• Destination country
• Required delivery date

For an exact legacy spare, these details are normally enough for the initial availability check.

For a REX615 retrofit, the following may also be required later:

• Transformer MVA rating
• HV and LV voltage
• Transformer vector group
• HV-side CT ratio
• LV-side CT ratio
• CT secondary – 1 A or 5 A
• Existing relay settings

International buyers can send an RFQ, BOQ or clear photograph of the installed relay.

Why Buy ABB SPAD 346 C from ARP IMPEX?

ARP IMPEX supports requirements for ABB protection relays used in existing industrial and utility installations.

We can assist with:

• SPAD 346 C part-code checking
• Nameplate matching
• Discontinued ABB relay enquiries
• Exact legacy spare requirements
• Single-unit and project quantity quotations
• Plant shutdown spares
• Transformer protection relay requirements
• SPAD 346 C to REX615 retrofit enquiries
• Technical datasheets with quotation
• Export packing and international shipping support

We handle enquiries from power utilities, EPC companies, panel builders, maintenance contractors, industrial plants and electrical traders.

ABB SPAD 346 C Product Status

SPAD 346 C is a specific ABB relay model, not a large family of different SPAD 346 models.

• Brand: ABB
• Series: SPACOM / SPAD
• Model: SPAD 346 C
• Product type: Stabilised differential protection relay
• Product status: Not active since 2012
• Main application: Transformer and generator-transformer protection
• Official ABB retrofit: REX615

The relay contains separate protection modules for differential, earth-fault and overcurrent protection rather than separate SPAD 346 C1/C2/C3 product variants.

Main Protection Modules in SPAD 346 C

ABB documentation identifies the main internal modules as:

• SPCD 3D53 – three-phase stabilised differential protection
• SPCD 2D55 – earth-fault protection
• SPCJ 4D28 – overcurrent and earth-fault protection

For buyers looking for an exact spare, the complete SPAD 346 C relay order code should normally be supplied rather than attempting to match the relay only from individual internal module numbers.

Technical Specifications

The following specifications are the useful points for a B2B product page:

• Brand: ABB
• Series: SPACOM / SPAD
• Model: SPAD 346 C
• Relay type: Stabilised transformer differential relay
• Rated current inputs: 1 A or 5 A
• Rated frequency: 50 Hz or 60 Hz
• Main protection: Three-phase differential protection
• Additional protection: Overcurrent and earth-fault protection
• Transformer inrush restraint: Second harmonic
• Transformer overexcitation restraint: Fifth harmonic
• CT ratio correction: Digitally adjustable
• Circuit-breaker failure protection: Available
• Heavy-duty trip outputs: Four
• Signalling outputs: Five
• Programmable external control inputs: Five
• Communication: Fibre-optic serial bus
• Communication speed: 4800 or 9600 baud
• Wide auxiliary supply: 80–265 V AC/DC
• Low-voltage auxiliary supply: 18–80 V DC
• Operating temperature: -10°C to +55°C
• Panel-mounted protection: IP54
• Approximate weight: 6 kg

For replacement enquiries, the 1 A/5 A current input, auxiliary supply and complete order code should be checked from the existing relay nameplate.

Features

• Three-phase transformer differential protection
• Transformer winding fault protection
• Interturn fault protection
• Earth-fault protection
• Three-stage overcurrent protection
• Backup earth-fault protection
• Protection for transformer inrush conditions
• Restraint during transformer overexcitation
• CT ratio correction through relay settings
• Circuit-breaker failure protection
• Trip and alarm outputs
• Programmable external inputs
• Fault and disturbance recording
• Phase-current and phase-angle indication
• Fibre-optic serial communication
• Continuous hardware and software self-supervision

These are the main functions a buyer needs to see. Detailed differential-setting calculations are better kept in the ABB manual rather than on the product page.

Applications

ABB SPAD 346 C is mainly used for:

• Two-winding power transformer protection
• Transformer differential protection
• Generator-transformer protection
• Generator-transformer units
• Transformer winding fault protection
• Transformer earth-fault protection
• Power plant transformer protection
• Substation transformer protection
• Unit transformer protection
• Industrial transformer protection
• Existing ABB SPACOM protection panels
• Legacy transformer relay replacement
• Plant shutdown spare requirements
• Transformer protection panel modernisation
• SPAD 346 C to REX615 retrofit projects

ABB also allows SPAD 346 C to be used with certain three-winding transformer applications where the required short-circuit power arrangement is met.

ABB SPAD 346 C Replacement

Since SPAD 346 C is no longer active, replacement is now one of the strongest commercial reasons for buyers to search for this model.

Typical requirements include:

• Original ABB SPAD 346 C spare
• Replacement for a failed SPAD 346 C
• Matching relay for an existing transformer panel
• Emergency shutdown spare
• Maintenance stock
• Discontinued ABB SPACOM relay
• Modern transformer protection retrofit

For an exact spare, send:

• Complete ABB order code
• Nameplate photograph
• Quantity
• Destination country

For international requirements, the destination country is useful so export packing and shipping can be considered with the quotation.

ABB SPAD 346 C Replacement with REX615

ABB officially supports SPAD 346 C replacement with REX615 through its current SPACOM retrofit program.

The standard ABB retrofit arrangement includes:

• REX615 protection and control relay
• Retrofit connector kit
• Documentation

ABB also offers configuration and installation support options as part of the retrofit program. The retrofit connector arrangement is intended to minimise major rewiring in the existing panel.

A SPAD 346 C to REX615 retrofit can be considered when:

• Existing SPAD 346 C has failed
• Original relay availability is difficult
• Long-term relay support is required
• Transformer protection panels are being modernised
• IEC 61850 communication is required
• Additional protection or monitoring functions are needed

The retrofit should still be checked against the actual transformer protection scheme. REX615 should not be selected only from the SPAD 346 C model name.

For retrofit review, useful information includes:

• Existing SPAD 346 C nameplate
• Transformer rating
• HV and LV voltages
• Vector group
• HV and LV CT ratios
• 1 A or 5 A CT secondary
• Auxiliary supply
• Existing relay settings

SPAD 346 C and Modern ABB Transformer Protection

ABB also points to RET615 Transformer Protection and Control as a related current product for SPAD 346 C applications.

For an existing SPAD 346 C panel, however, the REX615 retrofit program is particularly important because ABB specifically lists SPAD 346 C as a supported legacy relay.

For completely new transformer protection projects or broader panel redesigns, ABB’s current transformer protection range can be considered separately.

Information Required for ABB SPAD 346 C Quotation

For Legacy SPAD 346 C Supply

Please send:

• Complete ABB SPAD 346 C order code
• Clear nameplate photograph
• Required quantity
• Destination country
• Required delivery schedule

For SPAD 346 C to REX615 Retrofit

Please send the above information plus, where available:

• Transformer MVA rating
• HV voltage
• LV voltage
• Transformer vector group
• HV CT ratio
• LV CT ratio
• 1 A or 5 A CT secondary
• Auxiliary supply
• Existing SPAD 346 C settings

You do not need to provide all the technical information for the first enquiry. Part code + nameplate + quantity + destination country are normally enough to start.

Contact ARP IMPEX for ABB SPAD 346 C price, SPAD 346 C replacement relay, discontinued ABB SPAD 346 C availability, ABB transformer differential relay supplier and exporter in India, SPACOM relay spare, plant shutdown requirement or SPAD 346 C to REX615 retrofit quotation for international supply.