ABB SPAG 331 C Generator Protection Relay

ABB SPAG 331 C Generator Protection Relay Supplier and Exporter in India

ABB SPAG 331 C Replacement and Legacy Spare Availability

Replacement: ABB SPAG 331 C is discontinued. For an existing installation, the correct replacement should be checked against the complete ABB order code and relay nameplate to match the installed legacy unit.

ARP IMPEX supplies and exports ABB SPAG 331 C generator protection relays for replacement, plant maintenance and existing generator protection panels.

SPAG 331 C belongs to ABB’s older SPACOM generator protection range. It was mainly used for small and medium-sized generators and their prime movers in hydro power plants, thermal power stations and other generating plants. ABB also approved the relay for marine and offshore use.

The relay combines overcurrent, short-circuit, reverse power, overvoltage and residual overvoltage protection. It is particularly relevant to generator installations where residual voltage is used for earth-fault supervision. SPAG 331 C was also commonly applied to generators connected to the network through a generator transformer.

Since the relay has been discontinued, most buyers looking for SPAG 331 C today already have it installed. The requirement may be for a failed relay replacement, an additional maintenance spare or stock needed before a planned shutdown.

If you need an ABB SPAG 331 C replacement relay, send the complete ABB order number or a clear photograph of the existing relay nameplate. We can check the correct legacy version against the quantity and destination country.

Technical Specifications

• Brand: ABB
• Series: SPACOM / SPAG
• Model: SPAG 331 C
• Product type: Generator protection relay
• Product status: Legacy / discontinued
• Main application: Small and medium generator protection
• Current input: 1 A or 5 A
• Voltage input: 100 V or 110 V
• Rated frequency: 50 Hz or 60 Hz, depending on version
• Overcurrent protection: Two-stage
• Short-circuit protection: Available
• Reverse power protection: Available
• Overvoltage protection: Two-stage
• Residual overvoltage protection: Two-stage
• Communication: SPA serial communication
• Auxiliary supply: 80–265 V AC/DC or 18–80 V DC, depending on version
• Self-supervision: Built-in
• Enclosure protection: IP54

For an exact replacement, the complete order code should be checked because the frequency and auxiliary supply differ between versions.

Features

• Three-phase overcurrent protection
• Short-circuit protection
• Reverse power protection
• Two-stage overvoltage protection
• Two-stage residual overvoltage protection
• Generator earth-fault supervision through residual voltage
• Protection against generator motoring
• Local fault and operating indication
• SPA serial communication
• Connection to higher-level monitoring systems
• Internal hardware and software self-supervision
• Suitable for land-based, marine and offshore generator installations

For a B2B replacement enquiry, the important details are normally the complete order code, relay nameplate, quantity and destination rather than detailed relay setting calculations.

Applications

SPAG 331 C is commonly used for:

• Small generator protection
• Medium-sized generator protection
• Generator-transformer installations
• Generator reverse power protection
• Generator overvoltage protection
• Generator earth-fault supervision
• Small hydro power plants
• Thermal power stations
• Captive power plants
• Industrial generating stations
• Generator protection panels
• Marine generator systems
• Shipboard electrical systems
• Offshore installations
• Existing ABB SPACOM panels
• Plant shutdown spares

ABB specifically identifies small and medium power generators, hydro and thermal power stations, marine and offshore installations, and generators connected through generator transformers as SPAG 331 applications.

ABB SPAG 331 Models

The SPAG 331 range was supplied in two main versions:

ABB SPAG 331 B

SPAG 331 B is the version without serial communication capability.

ABB SPAG 331 C

SPAG 331 C includes a serial communication interface. It can communicate with higher-level systems through the ABB SPA bus using suitable SPA-ZC communication modules.

The protection functions of SPAG 331 B and C are closely related, but the communication arrangement is different. For an existing panel replacement, the exact model should therefore be checked from the nameplate.

ABB SPAG 331 C Replacement

ABB lists SPAG 331 C as not active since 2007. For installations where the relay is still in service, buyers may need:

• Replacement for a failed SPAG 331 C
• Matching legacy spare
• Spare for an existing generator panel
• Plant shutdown stock
• Maintenance inventory
• Marine generator spare
• Offshore equipment spare

For an exact replacement, please send:

• Complete ABB order code
• Clear relay nameplate photograph
• Required quantity
• Destination country
• Required delivery schedule

ABB’s current SPACOM-to-REX615 retrofit program does not list SPAG 331 C among the supported relay types. For this reason, we do not describe another ABB relay as a direct retrofit replacement for SPAG 331 C.

For an existing installation, the correct starting point is the original SPAG 331 C order code and nameplate.

Why Buy ABB SPAG 331 C from ARP IMPEX?

ARP IMPEX supports international buyers looking for ABB legacy relays for existing plants and maintenance needs.

We can assist with:

• ABB SPAG 331 C part-code checking
• Relay nameplate matching
• Legacy spare availability
• Replacement for failed relays
• Single-unit and multiple-quantity quotations
• Plant maintenance and shutdown spares
• Marine and offshore spare requirements
• ABB technical datasheets
• Export packing
• International shipping support

We handle RFQs from power plants, EPC contractors, industrial companies, marine operators, maintenance companies and electrical traders.

Request a Quote for ABB SPAG 331 C

For price and availability, please send:

• Complete ABB SPAG 331 C order number
• Clear relay nameplate photograph
• Required quantity
• Destination country
• Required delivery date

If the complete part number is not available, send the nameplate photograph, and we can start checking from there.

Send your ABB SPAG 331 C part code, quantity and destination country to ARP IMPEX for price, availability and export quotation.

ARP IMPEX supplies ABB SPAG 331 C replacement relays and legacy ABB SPACOM generator protection spares for international buyers.