Wireless measurement. Greater installation flexibility.

SILENTVAR supports wireless measurement of electrical parameters, reducing the need for additional measurement wiring. This provides greater flexibility when choosing the compensator’s installation location within the available space and existing technical constraints.

The solution is particularly useful where modifying the installation is difficult, costly or undesirable, including heritage buildings.

The system also supports wired measurement using a conventional current transformer or a split-core current transformer with a 5 A secondary output.

Silence is part of the technology

SILENTVAR operates without fans or the characteristic sounds of compensation step switching.

Quiet operation is particularly valuable in urban infrastructure, commercial facilities, offices and other locations where noise from technical equipment is undesirable

One enclosure. Two sizes. Up to 43 regulation steps.

In models M and L, the controller and main reactor are integrated into a single enclosure. Two device sizes are available:

• Model M: 190 × 190 × 160 mm.
• Model L: 190 × 260 × 160 mm.

The integrated design simplifies installation in control and lighting cabinets. Vertical or horizontal installation and DIN rail mounting make it easier to position the device within the available space.

In selected configurations, the system works with additional external reactors to extend the available compensation output and number of regulation steps.

Automatic. Precise. Without ongoing user intervention.

SILENTVAR monitors installation parameters and continuously adjusts the compensation level as the load changes.

The system includes:

• automatic reactive power compensation,
• SMART operating mode,
• reactor self-calibration,
• single-step compensation tuning,
• adjustment of the tan φ factor,
• time hysteresis between regulation step changes,
• overcurrent protection,
• automatic thermal protection,
• reactor temperature and compensation status alarms.

During normal operation, the device requires no ongoing user intervention.

Ready for integration

SILENTVAR supports remote parameter reading, setting changes and integration with external automation and monitoring systems.

Available communication options include:

• Wi-Fi,
• Ethernet,
• Modbus,
• REST API.

A built-in display provides local access to network and compensation parameters.

The device can work with the ASTgsm LTE control and monitoring system from AST System, enabling reactive power compensation to be integrated with lighting infrastructure monitoring.

Benefits

The SILENTVAR M / L system helps to:

• reduce reactive energy charges,
• automatically adjust compensation to the current load,
• reduce the need for manual adjustment,
• simplify installation through the integrated controller and main reactor design,
• reduce additional measurement wiring,
• simplify upgrades to existing cabinets,
• provide quiet, fanless operation,
• remotely monitor parameters and change settings,
• expand the system with additional reactors,
• integrate compensation with infrastructure management systems.

Key features

• Operation in single-phase and three-phase installations, depending on the configuration.
• Automatic reactive power compensation.
• SMART operating mode.
• Wireless parameter measurement as standard.
• Wired measurement using a current transformer with a 5 A secondary output.
• Up to 43 regulation steps, depending on the configuration.
• Compensation adjustment range of 12–100%.
• Reactor self-calibration.
• Single-step compensation tuning.
• Adjustment of the tan φ factor.
• Time hysteresis between regulation step changes.
• Support for additional external reactors.
• Direct control of an additional reactor with soft start — up to 2000 var.
• Indirect control of an additional reactor via a contactor — up to 4000 var.
• Display of network and compensation parameters.
• Remote parameter reading and setting changes.
• Wi-Fi, Ethernet and Modbus communication.
• REST API.
• Overcurrent and thermal protection.
• Reactor temperature and compensation status alarms.
• Quiet, fanless operation.
• Vertical or horizontal installation and DIN rail mounting.
• Compatibility with the ASTgsm LTE control and monitoring system from AST System, enabling reactive power compensation to be integrated with lighting infrastructure monitoring.

Technical specifications

Power supply

• Supply voltage: 230 V AC
• Voltage tolerance: −10% / +15%

Compensation and control

• Installation type: single-phase or three-phase, depending on the configuration
• System compensation output range: 35–7600 var, depending on the configuration and reactors used
• Number of regulation steps: up to 10, 21 or 43
• Compensation adjustment range: 12–100%
• SMART operating mode
• Adjustment of the tan φ factor
• Reactor self-calibration
• Single-step compensation tuning
• Time hysteresis between regulation step changes

Additional reactor control

• Direct control with soft start: up to 2000 var
• Indirect control via a contactor: up to 4000 var
• Maximum total system compensation output: 7600 var, with an appropriate configuration

Measurement

• Wireless parameter measurement as standard
• Wired measurement option
• Support for conventional or split-core current transformers with a 5 A secondary output
• Local parameter readings on the display

Communication

• Wi-Fi
• Ethernet
• Modbus
• REST API
• Remote parameter reading and setting changes
• Compatibility with the ASTgsm LTE system from AST System

Protection and alarms

• Overcurrent protection
• Automatic thermal protection
• Reactor temperature alarm
• Compensation status alarm

Mechanical specifications

• Design: controller and main reactor integrated into a single enclosure
• Protection rating: IP20
• Model M dimensions: 190 × 190 × 160 mm
• Model L dimensions: 190 × 260 × 160 mm
• Additional space for external reactors required in selected versions

Installation

• In control and lighting cabinets
• DIN rail mounting
• Vertical or horizontal orientation

Operating conditions

• Operating temperature: −20°C to +60°C

Seven versions. One system.

SILENTVAR M / L is available in seven configurations with different compensation outputs and numbers of regulation steps.

Versions 1520/21, 3600/21, 1470/43 and the final 43-step version use additional external reactors. The stated outputs cover the complete configuration, including these reactors. The dimensions shown in the table refer to the enclosure containing the integrated controller and main reactor.

Custom versions with individually selected reactor designs, compensation outputs and numbers of regulation steps are also available.

Applications

• Street lighting control cabinets — reactive power compensation in new and existing lighting installations.
• Switchboard upgrades — an integrated design and wireless measurement make it easier to fit the device into the available space.
• Commercial facilities and public buildings — automatic reduction of reactive energy charges in installations with suitable load characteristics.
• Heritage buildings — reduced need for additional measurement wiring.
• Infrastructure requiring remote supervision — integration of compensation parameters with monitoring and automation systems.

Select the right compensator for your installation

The output and configuration of the SILENTVAR system should be selected based on an analysis of the installation’s electrical parameters, load characteristics and reactive energy billing arrangements.

COREVOLT provides technical support in selecting the appropriate solution, taking into account installation conditions, the required compensation range and integration options with existing infrastructure.