SPTU 240 R2

What does this module do in a protection relay assembly?

This unit serves as the power supply and output relay module within compatible relay assemblies. It provides the internal operating voltages needed by the relay electronics and also handles output relay functions, including the trip path.

What auxiliary voltage range does this version accept?

This version is designed for an auxiliary supply range of 80 to 265 V AC/DC. That wide input range makes it suitable for many existing industrial and utility control panels.

Can it be used with both AC and DC auxiliary supplies?

Yes. The SPTU 240 R2 is intended for use with either AC or DC auxiliary voltage, provided the supply remains within the stated 80 to 265 V range.

What type of trip contact does this version provide?

This module is the normally open trip contact version. For applications that require a normally closed trip contact, the corresponding R3 version is typically used instead.

Is this a complete protection relay?

No. It is a plug-in module used inside compatible ABB relay assemblies rather than a complete protection relay on its own.

Which relay assemblies is this module commonly used with?

ABB documentation shows this module used in compatible assemblies such as the SPAM 150 C motor protection relay and the SPAJ 160 C capacitor protection relay, along with other relays built on the same modular platform.

Is this the low-voltage DC version?

No. This is the wide-range 240 version. The lower-voltage alternative is generally the 48 R2, which is intended for 18 to 80 V DC applications.

Is the module a plug-in type?

Yes. It is a withdrawable module fitted within the host relay assembly, which is useful when a like-for-like replacement is needed in compatible equipment.

What should be checked before selecting this module?

The key points to confirm are the auxiliary voltage range, the required trip contact arrangement, and the exact host relay assembly using the module. Matching the module version to the relay design is important, particularly where normally open versus normally closed trip operation matters.

Does this unit only provide power, or does it also handle relay outputs?

It does both. Alongside the power supply function, it includes the output relay section and the associated control circuitry used by the compatible relay assembly.

What internal voltages does the module create for the relay assembly?

In compatible assemblies, the module forms the DC secondary voltages required by the relay electronics, including +24 V, ±12 V and +8 V. The logic voltage used by the measuring module is then derived within the relay electronics.

Is a fuse fitted on the module?

Yes. The primary side includes a 1 A slow fuse according to the relay documentation for assemblies that use this module.