ABB TVOC-2-240 1SFA664001R1001

Description

Introduction to the ABB TVOC-2-240 1SFA664001R1001

Product Description

The ABB TVOC-2-240 1SFA664001R1001 is a specific model of a voltage monitoring relay, also known as an undervoltage and overvoltage release, from ABB’s extensive range of circuit protection and control components. This device is designed to continuously monitor the three-phase supply voltage in industrial and commercial electrical installations. The ABB TVOC-2-240 series protects equipment by automatically disconnecting the load via an auxiliary contactor or circuit breaker if the voltage falls below (undervoltage) or rises above (overvoltage) preset thresholds for a defined time delay. This specific article number, 1SFA664001R1001, denotes a precise variant calibrated for a 240VAC system with particular setpoints and timing characteristics. It is a crucial component for safeguarding motors, generators, and sensitive electronic equipment from damage caused by irregular or faulty mains supply conditions.

Product Parameters

• Product Series: ABB TVOC (Three-Phase Voltage Monitoring Relay)

• Model: TVOC-2-240

• Article Number: 1SFA664001R1001

• Device Type: Three-Phase Undervoltage & Overvoltage Release / Monitoring Relay

• Rated Operational Voltage (Ue): 240 VAC, 50/60 Hz (as indicated by -240 suffix).

• Monitoring Functions: Undervoltage (U<) and Overvoltage (U>) protection.

• Setting Ranges: Adjustable setpoints for voltage thresholds and time delays (trip delay on fault, restart delay).

• Output Contacts: Typically features at least one changeover (SPDT) relay contact rated for control circuit currents.

• Power Supply: Self-powered from the monitored three-phase lines.

• Mounting: DIN-rail mounting (typically 35mm).

• Status Indication: LED indicators for power and fault conditions.

Advantages and Features

The primary advantage of the ABB TVOC-2-240 1SFA664001R1001 is its simplicity and effectiveness in preventing equipment damage and operational issues due to poor power quality. It offers reliable protection against phase loss, asymmetry, and incorrect phase sequence in addition to under/over voltage conditions. The device features adjustable thresholds and time delays, allowing it to be tuned to the specific requirements of the connected load, avoiding nuisance tripping during short-term grid fluctuations. Its compact, DIN-rail design allows for easy integration into control panels and motor starter assemblies. As a genuine ABB component, it assures high quality, durability, and compatibility with other ABB control gear.

Application Cases in Industry

This voltage monitor is used in any three-phase application where stable voltage is critical. In industrial motor control, it protects pumps, fans, and compressors from damage due to low voltage (which can cause overheating) or overvoltage. In HVAC systems, the ABB TVOC-2-240 1SFA664001R1001 safeguards chiller and air handler motors. It is essential in generator and UPS (Uninterruptible Power Supply) systems to monitor output voltage quality. It is also widely used in commercial buildings, water treatment plants, and renewable energy installations to protect sensitive control panels and machinery from supply anomalies.

Comparison with Competing Products

Competing products include three-phase voltage monitors from Siemens (3RN1), Schneider Electric (RM35U), and Eaton. The ABB TVOC-2-240 1SFA664001R1001 competes through ABB’s strong global distribution and reputation in electrical components. Its performance and features are comparable to other top-tier brands, often differing in specific adjustment ranges, time delay characteristics, or the physical form factor. The selection often comes down to brand preference, panel standardization, availability, and the specific voltage and timing curves required by the application. The ABB variant is known for its robust construction and clear setting dials.

Selection Suggestions and Precautions

Selecting the ABB TVOC-2-240 1SFA664001R1001 requires matching its voltage rating (240VAC) precisely to the nominal system voltage. The adjustable thresholds must be set appropriately: the undervoltage setpoint should be above the minimum tolerable voltage for the load, and the overvoltage setpoint below the maximum. Time delays must be set to allow for normal system transients (like motor starting) while still providing timely protection. Ensure the output contact rating is sufficient to control the coil of the associated contactor or breaker.

Precautions:

• Installation and wiring must be performed by a qualified electrician in accordance with local electrical codes and regulations.

• The device must be connected to the correct phase sequence (L1, L2, L3) as per the terminal designations.

• Before applying power, verify that all voltage and time delay settings are correctly adjusted for the specific application.

• The monitoring relay protects against voltage anomalies but does not provide short-circuit or overload protection; it must be used in conjunction with fuses or circuit breakers.

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