ABB SPAU 331 C Undervoltage and Residual Overvoltage Relay

ABB SPAU 331 C Undervoltage and Residual Overvoltage Relay Supplier and Exporter in India

ABB SPAU 331 C Replacement – REX615 Retrofit

ABB SPAU 331 C is a legacy SPACOM voltage protection relay used in older substations and industrial power distribution systems. ABB lists SPAU 331 C as not active since 2009, so present-day requirements are mainly for replacement of an installed relay, maintenance spares, shutdown requirements or modernisation of an existing protection panel.

ABB currently includes SPAU 331 C in its SPACOM-to-REX615 Relay Retrofit Program. The ABB retrofit program uses a REX615 relay with a retrofit connector kit and documentation, with the aim of reducing major new wiring and shortening the work required during replacement.

For an ABB SPAU 331 C replacement or REX615 retrofit enquiry, please send:

• Complete ABB SPAU 331 C order code
• Exact model – SPAU 331 C1 or SPAU 331 C5
• Clear photograph of the existing relay nameplate
• 100 V or 110 V rated voltage
• 50 Hz or 60 Hz frequency
• Auxiliary supply voltage
• Existing protection settings, if available
• Required quantity
• Destination country

ARP IMPEX supplies and exports legacy ABB relay requirements and handles enquiries for ABB SPAU 331 C replacement relays, SPAU 331 C1 spares, SPAU 331 C5 spares and SPAU 331 C to REX615 retrofit requirements.

Description

ARP IMPEX is a supplier and exporter of ABB SPAU 331 C undervoltage and residual overvoltage relays for replacement, maintenance and existing switchgear requirements.

SPAU 331 C belongs to ABB’s older SPACOM voltage relay range. It was mainly used for supervision of busbar voltages in distribution substations. The relay measures phase-to-phase voltages as well as residual voltage and provides three-phase undervoltage protection and residual overvoltage protection.

It is also suitable for applications where undervoltage protection and residual voltage supervision are needed together. ABB specifically mentions protection of large motors as another application for SPAU 331 C.

Today, buyers searching for SPAU 331 C are often looking for:

• Replacement of a failed SPAU 331 C
• SPAU 331 C1 matching spare
• SPAU 331 C5 replacement
• Legacy ABB SPACOM relay availability
• Spare relay for a plant shutdown
• Existing busbar protection panel maintenance
• Large motor protection relay replacement
• SPAU 331 C to REX615 retrofit

If you are looking for an ABB SPAU 331 C supplier in India, SPAU 331 C price, discontinued SPAU 331 C availability or SPAU 331 C replacement relay, send us the complete order code or relay nameplate for checking.

Request a Quote for ABB SPAU 331 C

For price and availability, please share:

• Complete ABB order code
• Exact model – C1 or C5
• Required quantity
• Destination country
• Required delivery schedule

For replacement of an existing relay, please also send a clear nameplate photograph.

If the complete code is unavailable, mention:

• 100 V or 110 V
• 50 Hz or 60 Hz
• Auxiliary supply voltage
• Whether residual overvoltage protection is required
• Original SPAU 331 C or REX615 retrofit requirement

Why Buy ABB SPAU 331 C from ARP IMPEX?

• Support for discontinued and legacy ABB relay enquiries
• SPAU 331 C part-code checking
• SPAU 331 C1 and C5 identification
• Nameplate matching for existing relay replacement
• Single-piece and project quantity quotations
• Support for plant shutdown and maintenance spare requirements
• SPAU 331 C to REX615 retrofit enquiries
• Technical datasheets with quotations
• Export packing and international shipping support
• Supply support for utilities, EPC contractors and industrial buyers

ABB SPAU 331 C Models

ABB’s product guide identifies two main SPAU 331 C variants: SPAU 331 C1 and SPAU 331 C5. The difference is important when quoting a replacement because the two versions do not have the same protection-module combination.

ABB SPAU 331 C1

SPAU 331 C1 includes:

• SPCU 1C6 residual overvoltage module
• SPCU 3C15 three-phase undervoltage module

This version therefore provides both residual overvoltage protection and three-phase undervoltage protection.

Typical order-number groups documented by ABB include:

• RS 613 031-AA
• RS 613 031-CA
• RS 613 031-DA
• RS 613 031-FA

ABB also documented versions supplied with an RTXP18 test adapter under the RS 613 231 order-number group.

ABB SPAU 331 C5

SPAU 331 C5 includes:

• SPCU 3C15 three-phase undervoltage module

It does not include the SPCU 1C6 residual overvoltage module listed for SPAU 331 C1. This is why the exact C1/C5 designation should be confirmed before supplying a replacement.

Typical order-number groups include:

• RS 613 035-AA
• RS 613 035-CA
• RS 613 035-DA
• RS 613 035-FA

Versions with the RTXP18 test adapter were also documented under the RS 613 235 order-number group.

Order Code Suffixes

ABB documentation identifies the final order-code letters as follows:

• AA: 50 Hz, auxiliary supply 80–265 V AC/DC
• CA: 50 Hz, auxiliary supply 18–80 V DC
• DA: 60 Hz, auxiliary supply 80–265 V AC/DC
• FA: 60 Hz, auxiliary supply 18–80 V DC

For replacement enquiries, buyers should therefore provide the complete RS order number, not only “SPAU 331 C”.

Technical Specifications

• Brand: ABB
• Series: SPACOM / SPAU
• Product family: SPAU 331 C
• Product type: Undervoltage and residual overvoltage relay
• Product status: Legacy / not active since 2009
• Main variants: SPAU 331 C1 and SPAU 331 C5
• Main application: Busbar voltage supervision in distribution substations
• Voltage measurement: Three-phase-to-phase voltages
• Residual voltage measurement: Available on SPAU 331 C1
• Rated voltage: 100 V or 110 V
• Rated frequency: 50 Hz or 60 Hz
• Rated voltage burden: Less than 0.5 VA
• Continuous voltage withstand: 2 × rated voltage
• Residual overvoltage module: SPCU 1C6 on C1
• Undervoltage module: SPCU 3C15
• Low-set residual overvoltage stage U0>: 2–100% of Un
• High-set residual overvoltage stage U0>>: 2–80% of Un
• Low-set undervoltage stage U<: 0.4–1.2 × Un
• High-set three-phase undervoltage stage 3U<<: 0.1–1.2 × Un
• Undervoltage timing: Definite-time; inverse-time option for U< stage
• External blocking: Available
• Output relays: For tripping, control and signalling
• Output contact rated voltage: Up to 250 V AC/DC
• Communication: Fibre-optic SPA serial bus
• Auxiliary supply option 1: 80–265 V AC/DC
• Auxiliary supply option 2: 18–80 V DC
• Self-supervision: Built-in internal supervision
• Panel protection: IP54 when panel mounted
• Operating temperature: -10°C to +55°C
• Approximate weight: 5.5 kg

The exact version, rated frequency and auxiliary supply should always be confirmed from the ABB order number or existing relay nameplate.

Features

Depending on the model, SPAU 331 C provides:

• Three-phase undervoltage protection
• Residual overvoltage protection on SPAU 331 C1
• Two-stage undervoltage protection
• Two-stage residual overvoltage protection on C1
• Phase-to-phase voltage measurement
• Residual voltage measurement on C1
• Definite-time protection
• Inverse-time option for the low-set undervoltage stage
• External blocking of protection stages
• Automatic blocking of the low-set undervoltage stage if energising voltage is lost
• Trip and signalling outputs
• Digital display of settings and measured values
• Recorded fault and event information
• SPA serial communication
• Fibre-optic connection to substation systems
• Built-in self-supervision
• 100 V and 110 V versions
• 50 Hz and 60 Hz versions
• Different auxiliary supply options

For a B2B replacement enquiry, the most important points are normally the C1/C5 variant, order number, rated voltage, auxiliary supply and existing settings.

Applications

ABB SPAU 331 C is commonly associated with:

• Distribution substation busbar voltage supervision
• Three-phase undervoltage protection
• Residual overvoltage protection
• Residual voltage supervision
• Busbar protection panels
• Medium-voltage switchgear
• Industrial substations
• Large motor undervoltage protection
• Large motor residual voltage supervision
• Incoming power distribution panels
• Existing ABB SPACOM installations
• Legacy relay replacement
• Plant shutdown spare requirements
• Maintenance stock for older substations
• Protection-panel modernization
• SPAU 331 C to REX615 retrofit projects

ABB identifies distribution-network busbars and large motors as key SPAU 331 C applications.

ABB SPAU 331 C Replacement

Because ABB has classified SPAU 331 C as inactive since 2009, most enquiries today relate to installed equipment rather than new projects.

Buyers may require:

• Original ABB SPAU 331 C spare
• ABB SPAU 331 C1 replacement
• ABB SPAU 331 C5 replacement
• Matching relay for existing switchgear
• Replacement for a failed SPAU relay
• Shutdown spare
• Maintenance stock
• Modern retrofit for an older SPACOM installation

For an exact legacy replacement, send:

• Complete RS order number
• SPAU 331 C1 or C5 designation
• Nameplate photograph
• Required quantity
• Destination country

The complete order code is useful because it also identifies the rated frequency and auxiliary supply version.

ABB SPAU 331 C Replacement with REX615

ABB officially lists SPAU 331 C among the SPACOM relay types supported by its current REX615 Relay Retrofit Program.

ABB’s retrofit program includes:

• REX615 relay
• Retrofit connector kit
• Documentation

Configuration support, installation tools and other services are also available within the ABB retrofit program. ABB states that the approach is intended to minimise major new wiring and reduce shutdown time during modernisation.

A SPAU 331 C to REX615 retrofit may be considered when:

• The original SPAU 331 C is difficult to source
• An installed relay has failed
• Long-term support is required
• Existing switchgear is being modernised
• New communication requirements are being introduced
• Additional protection or monitoring functions are needed

Before finalising the replacement, check:

• SPAU 331 C1 or C5
• Complete order number
• 100 V or 110 V voltage inputs
• 50 Hz or 60 Hz
• Auxiliary supply
• Residual voltage input, where applicable
• Trip contacts
• Alarm contacts
• Blocking signals
• Existing protection settings
• Existing panel wiring

The REX615 should therefore be treated as a retrofit solution, not simply as a drop-in relay chosen only from the SPAU 331 C model name.

Information Required for ABB SPAU 331 C Quotation

For most enquiries, please send:

• Complete ABB SPAU 331 C order code
• SPAU 331 C1 or SPAU 331 C5
• Clear nameplate photograph
• Required quantity
• Destination country
• Required delivery schedule

If the full order number is unavailable:

• 100 V or 110 V rated voltage
• 50 Hz or 60 Hz
• Auxiliary supply voltage
• Residual overvoltage protection required or not
• Original SPAU 331 C replacement or REX615 retrofit

ARP IMPEX accepts enquiries against an ABB relay order code, nameplate photograph, BOQ or existing protection-panel details.

Contact ARP IMPEX for ABB SPAU 331 C price, SPAU 331 C1 replacement relay, SPAU 331 C5 spare, discontinued ABB SPAU 331 C availability, ABB voltage relay supplier in India, legacy SPACOM relay supply or SPAU 331 C to REX615 retrofit quotation from India.