ABB 1SFL451024R8000 UA110-30-00RA-80 Capacitor Duty Contactor 220-230V 50Hz

The ABB 1SFL451024R8000 is a three-pole capacitor duty contactor from ABB’s UA
contactor family. Its extended product type is UA110-30-00RA-80. The contactor is
specifically designed for capacitor switching applications and is suitable for electrical systems
where capacitor banks are used for reactive power compensation and power factor correction.

The device operates with an AC control circuit rated at 220-230 V at 50 Hz and
230-240 V at 60 Hz. It provides three normally open main contacts and has no auxiliary contacts
mounted in the standard configuration. ABB identifies the product as a three-phase contactor
suitable for capacitor switching, with a permissible peak current that can reach up to 100 times
the nominal RMS current under the applicable capacitor switching conditions.

ABB 1SFL451024R8000 Product Overview

The ABB 1SFL451024R8000 is part of the UA110 range of contactors developed for capacitor switching.
Unlike a standard motor contactor, a capacitor duty contactor is designed around the particular
electrical conditions that occur when a capacitor bank is connected to an energized electrical
system.

Capacitors can produce a substantial transient current when they are energized. The magnitude of
this current can be considerably higher than the normal steady-state current of the capacitor.
For this reason, capacitor switching equipment requires a contactor specifically suited to these
conditions.

The UA110-30-00RA-80 configuration uses a three-pole main circuit and an AC-operated coil. Its
capacitor-duty design makes it suitable for automatic capacitor bank systems, reactive power
compensation equipment and power factor correction installations.

Technical Specifications

Capacitor Switching Function

The principal purpose of the ABB 1SFL451024R8000 is to control capacitor circuits in three-phase
electrical systems. Capacitor banks are commonly installed to compensate reactive power generated
by inductive electrical loads. When correctly applied, capacitor banks can improve the power factor
of an electrical installation and reduce unnecessary reactive power demand.

Switching a capacitor is different from switching a conventional resistive or motor load. When the
capacitor is connected, the initial current can rise sharply for a very short period. ABB’s UA110
capacitor contactor family is designed specifically for these switching conditions.

According to ABB product information, the UA110-30-00RA configuration is intended for capacitor
switching and can accommodate a maximum permissible peak current of up to 100 times the nominal RMS
current under the relevant operating conditions. This characteristic is important for installations
where capacitor stages are switched frequently.

Electrical Performance

The 1SFL451024R8000 uses a 220-230 V AC control supply at 50 Hz. For 60 Hz operation, the specified
control voltage is 230-240 V AC. The correct control voltage should always be verified against the
electrical control circuit before installation.

The main circuit provides three normally open poles, allowing the contactor to control a three-phase
capacitor circuit. No normally open or normally closed auxiliary contacts are mounted in the
standard UA110-30-00RA-80 configuration.

ABB specifies a rated reactive power of 70 kvar at 400 V and 50 Hz for this capacitor contactor
configuration. This rating is particularly relevant when selecting the contactor for a power factor
correction panel, because capacitor bank reactive power should be matched with the contactor’s
specified capacitor-switching capability.

Applications in Power Factor Correction

Power factor correction is one of the most important applications for the ABB 1SFL451024R8000.
Industrial facilities often operate motors, transformers and other inductive loads that create
reactive power demand. Capacitor banks can be switched into the electrical system to compensate for
part of this reactive demand.

Automatic power factor correction panels typically contain multiple capacitor stages. Each stage
can be connected or disconnected according to the measured electrical conditions. The capacitor
contactor provides the switching interface between the control system and the corresponding
capacitor stage.

The three-pole design of the UA110-30-00RA-80 makes it appropriate for three-phase capacitor bank
configurations. Its dedicated capacitor-duty construction also distinguishes it from general-purpose
contactors used for conventional motor applications.

Installation Considerations

The ABB 1SFL451024R8000 has published dimensions of approximately 170 mm in height, 90 mm in width
and 155.6 mm in depth. These dimensions should be considered when designing or modifying an electrical
cabinet.

Installation should also take into account the capacitor bank rating, system voltage, protection
equipment, conductor sizing, cabinet ventilation and ambient operating conditions. The contactor
should be selected as part of the complete capacitor switching system rather than considered as an
isolated component.

Particular attention should be paid to the control voltage. The product number
1SFL451024R8000 corresponds specifically to the 220-230 V AC 50 Hz control version.
Other UA110 versions have different voltage codes and therefore should not be assumed to be
electrically interchangeable without verification.

Typical Applications

• Automatic power factor correction panels
• Three-phase capacitor bank switching
• Reactive power compensation systems
• Industrial electrical distribution systems
• Capacitor switching control cabinets
• Power factor correction equipment
• Industrial power management systems
• Three-phase capacitor stage control

UA110-30-00RA-80 Product Identification

Correct identification is important when selecting the ABB 1SFL451024R8000 because the UA110 family
includes multiple versions with different control voltages and configurations. The complete
identification should therefore include both the ABB product number and the extended product type.

For this product, the ABB product number is 1SFL451024R8000 and the extended product
type is UA110-30-00RA-80. ABB’s product documentation and product listings associate
these two identifiers with the same 220-230 V AC 50 Hz capacitor switching contactor.

The UA110-30-00RA-80 should also be distinguished from the smaller UA95-30-00RA-80. The two models
share a similar three-pole capacitor switching concept and the same 220-230 V control voltage, but
the UA110 version has the higher electrical rating and a 70 kvar rated reactive power capability at
400 V and 50 Hz.

Conclusion

The ABB 1SFL451024R8000 is a UA110-30-00RA-80 three-pole capacitor duty contactor
designed for capacitor switching applications. With a 220-230 V AC 50 Hz control supply, three
normally open main contacts and a rated reactive power of 70 kvar at 400 V and 50 Hz, it is designed
for use in power factor correction and reactive power compensation systems.

Its dedicated capacitor-switching design addresses the high transient currents that can occur when
capacitor banks are connected to an energized electrical system. For engineering and replacement
applications, the complete ABB product number, extended product type, control voltage, system
voltage and capacitor bank rating should be verified before selecting the component.