ABB UA95-30-00 110V 50Hz Capacitor Switching Contactor 1SFL431022R8400

ABB UA95-30-00 Product Overview

The ABB UA95-30-00 belongs to the UA family of three-pole contactors intended for
switching capacitors. Capacitor circuits have electrical characteristics that differ
from conventional resistive and many inductive loads. When a capacitor is connected to
a power system, the resulting energization event can generate a substantial transient
current. A contactor designed for capacitor duty therefore needs to be selected according
to the characteristics of the capacitor installation.

ABB developed the UA series to address this type of switching requirement. The UA95
designation identifies a specific contactor size within the family, while the 30-00
configuration indicates the main contact arrangement and absence of integrated auxiliary
contacts. The complete reference 1SFL431022R8400 further identifies the 110 V 50 Hz
control-voltage version.

This distinction is important when selecting an ABB contactor because the UA95 family is
available with multiple control voltages. A product with the same basic contactor
designation may exist with 24 V, 48 V, 220–230 V, 230–240 V, 380–400 V, or other control
voltage configurations. The complete product number should therefore be used when
identifying the exact electrical configuration.

Capacitor Switching Application

Capacitor banks are widely used in electrical installations for reactive-power
management and power-factor correction. By connecting appropriate capacitor stages to
the electrical network, a system can compensate for reactive power associated with
inductive loads and improve overall power utilization.

Switching capacitor stages requires equipment capable of handling the electrical
conditions that occur during connection and disconnection. The ABB UA95-30-00 is
classified for capacitor switching and is associated with the AC-6b utilization category.
This makes it different from selecting a general-purpose contactor solely according to
a conventional current value.

ABB specifies a rated reactive power of 65 kvar at 400 V for the UA95-30-00. The same
product family information also identifies a maximum permissible peak current of
approximately 9.3 kA for the relevant capacitor-switching application. These values
provide important reference points when evaluating the contactor within a capacitor
bank or reactive-power compensation system.

110V 50Hz Control Circuit

The specific ABB UA95-30-00 configuration covered by product number 1SFL431022R8400
operates with a rated control supply voltage of 110 V AC at 50 Hz. For 60 Hz operation,
ABB specifies a control voltage range of 110–120 V.

The control circuit is electrically separate from the main power circuit in terms of
its function within the contactor. The control voltage energizes the operating mechanism,
causing the three main contacts to change state. This arrangement allows a control
system to command capacitor-stage switching without directly switching the main circuit
through the control wiring.

Correct control-voltage identification is essential when integrating the UA95-30-00 into
an electrical system. The 110 V 50 Hz specification should not be confused with the
voltage of the main circuit. The control voltage identifies the particular coil
configuration, while the main circuit has its own operating-voltage and capacitor-duty
characteristics.

Technical Specifications

Main Contact Arrangement

The UA95-30-00 uses three main normally open contacts. These contacts provide the
three-phase switching path for the connected capacitor circuit. When the contactor is
energized, the main contacts change from their normal open state to establish the
electrical connection required by the application.

Unlike the UA95-30-11 configuration, the UA95-30-00 does not include built-in auxiliary
contacts. ABB identifies this configuration with zero normally open and zero normally
closed auxiliary contacts. Additional auxiliary contact blocks can be considered when
the control architecture requires feedback, interlocking, sequencing, or status
indication.

This difference is particularly useful when comparing ABB UA95 models. The complete
suffix should be checked before selecting a contactor because the auxiliary-contact
arrangement can affect both the electrical design and the available control functions.

Electrical Performance

The UA95-30-00 is intended for capacitor switching conditions where transient current
behavior must be considered. ABB’s product documentation specifies the contactor for
capacitor applications with a maximum permissible peak current related to the nominal
RMS current. For the UA95-30-00, the listed maximum peak-current value is 9.3 kA.

The rated reactive power is 65 kvar at 400 V for the AC-6b application. The appropriate
capacitor-stage rating should always be evaluated together with the actual system
voltage, capacitor configuration, operating frequency, switching conditions, and
installation requirements.

The main circuit is rated for an operational voltage of up to 1000 V, while ABB
documentation specifies an impulse withstand voltage of 8 kV. These characteristics
provide important reference data when evaluating the contactor as part of a low-voltage
power distribution or power-factor correction system.

Mechanical Construction and Installation

ABB lists the UA95 contactor with a compact block construction suitable for industrial
electrical installations. The documented dimensions for the UA95 configuration are
approximately 148 mm in height, 90 mm in width, and 123.5 mm in depth.

Installation planning should account for the physical dimensions of the contactor,
conductor routing, terminal accessibility, cabinet layout, heat dissipation, and
required clearances. The surrounding installation should also be designed according to
the applicable electrical standards and the technical requirements of the complete
capacitor system.

The contactor’s mechanical arrangement is intended to support the repeated switching
requirements associated with capacitor applications. ABB documentation identifies an
electrical life of up to 100,000 switching cycles for the relevant UA capacitor
contactor application.

Typical Industrial Applications

ABB UA95-30-00 can be applied in electrical systems where capacitor stages are switched
as part of reactive-power management. Typical applications include capacitor banks,
automatic power-factor correction panels, reactive-power compensation systems, and
industrial power distribution equipment.

In an automatic power-factor correction installation, multiple capacitor stages may be
connected to the electrical network according to changing load conditions. A controller
can determine the required compensation level and operate the corresponding contactors.
The UA95-30-00 provides the three-phase switching interface for a compatible capacitor
stage.

The exact application rating should be determined from the capacitor bank design rather
than from the contactor model alone. System voltage, reactive power, frequency, transient
conditions, ambient temperature, and switching frequency all contribute to correct
equipment selection.

Product Identification

Accurate identification of the ABB UA95-30-00 110V 50Hz version is important because
the UA95 family includes multiple control-voltage configurations. The full product
reference for this version is 1SFL431022R8400, with extended product type
UA95-30-00-84.

The number 84 in the extended product designation identifies the relevant 110 V control
voltage configuration within the ABB ordering system. The 50 Hz control voltage is
110 V, while ABB specifies 110–120 V for 60 Hz operation.

When recording this contactor in engineering databases, equipment documentation, or
component lists, retaining both the UA95-30-00 designation and the complete ABB product
number helps prevent confusion with other variants.

Conclusion

ABB UA95-30-00 110V 50Hz is a three-phase capacitor switching contactor identified by
ABB product number 1SFL431022R8400 and extended product type UA95-30-00-84. It is part
of the ABB UA series and is designed for capacitor switching applications under the
AC-6b utilization category.

The contactor provides three main normally open contacts without built-in auxiliary
contacts. Its 110 V AC 50 Hz control circuit, 65 kvar rated reactive power at 400 V,
9.3 kA maximum peak-current value, and main circuit rating up to 1000 V define important
characteristics of this particular configuration.

With its dedicated capacitor-switching design, the ABB UA95-30-00 is suited to
compatible capacitor banks, power-factor correction systems, and reactive-power
compensation installations. Correct selection should always consider the complete
electrical system, including capacitor rating, operating voltage, control voltage,
frequency, transient current, installation conditions, and the required switching duty.