DATAKOM AVR-8A Voltage Regulator

AED416.00

DATAKOM AVR-8A is (Original) and made in Turkey. It is an advanced Automatic Voltage Regulator designed to maintain the output voltage of synchronous alternators at a stable level by controlling the excitation current. This model is commonly used in diesel or gas generator sets and is suited for various industrial, commercial, and residential applications.

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Description

DATAKOM AVR-8A is an advanced Automatic Voltage Regulator designed to maintain the output voltage of synchronous alternators at a stable level by controlling the excitation current. This model is commonly used in diesel or gas generator sets and is suited for various industrial, commercial, and residential applications.

Features:

High Voltage Handling:

  • Senses input voltage from 170-277 VAC for single-phase alternators.
  • Designed for brushless alternators.

Wide Frequency Range:

  • Operates in both 50 Hz and 60 Hz systems with auto-sensing or manual adjustment.

High Excitation Capacity:

  • Output voltage: Up to 125 VDC (depending on alternator specifications).
  • Maximum excitation current: Typically up to 8 Amps.

Control Adjustments:

  • Voltage Adjustment: Built-in potentiometer for fine voltage control.
  • Stability Adjustment: To prevent oscillation under dynamic load conditions.
  • Under-Frequency Roll-Off (UFRO): Excitation is reduced at lower speeds, preventing over-excitation and generator damage.

Protection Features:

  • Over-voltage protection (OVP) for excitation windings.
  • Short-circuit protection for the excitation circuit.
  • Under-frequency protection (UFP) to stabilize voltage output at low generator speeds.

Durable Design:

  • Built to handle harsh environmental conditions.
  • Compact and rugged, designed for easy integration into generator control panels.

Specifications:

Input Voltage:

    • 170-277 VAC (single-phase, typically derived from the generator’s output).

Output Voltage and Current:

    • Voltage: Up to 125 VDC.
    • Current: Maximum of 8 Amps.

Frequency:

    • Operates with both 50 Hz and 60 Hz alternators.

Environmental Limits:

  • Operating Temperature: -40°C to +70°C.
  • Humidity: Up to 95% (non-condensing).

Mounting:

  • Can be installed inside the generator housing or on a control panel.

Control Functions:

Voltage Regulation:

  • Maintains output voltage under varying load conditions.
  • Adjustable via built-in or external potentiometers.

Stability and Response:

  • Damping adjustment ensures smooth voltage recovery after load changes.

Under-Frequency Roll-Off (UFRO):

  • Automatically reduces excitation when the generator’s frequency drops below a set threshold (e.g., during starting or overload).

Protection Mechanisms:

  • Prevents damage to both the AVR and the generator under fault conditions like over-voltage, over-current, or low-speed operation.

Applications:

  • Diesel and gas generator sets for:
  1. Industrial plants.
  2. Commercial buildings.
  3. Residential power backup.
  4. Marine generators.
  • Voltage stabilization for sensitive electrical systems and machinery.

Installation:

Wiring:

  • Input terminals: Connect to alternator output (for voltage sensing).
  • Output terminals: Connect to the excitation winding of the alternator.

Polarity:

  • Ensure correct polarity for excitation terminals (positive and negative).

Potentiometer Setup:

  • Adjust voltage and stability settings using the built-in controls for optimal performance.

Grounding:

  • Proper grounding is essential for noise suppression and safety.

Troubleshooting:

No Output Voltage:

  • Verify the input voltage to the AVR is within the rated range.
  • Inspect wiring to the excitation windings for continuity.

Voltage Instability:

  • Adjust the stability potentiometer to reduce fluctuations.
  • Check for loose or faulty connections.

Over-Voltage Condition:

  • Ensure the voltage adjustment setting is correct.
  • Inspect the alternator’s excitation system for faults.

Low Voltage Output:

  • Adjust the voltage potentiometer to increase output.
  • Verify alternator speed and ensure it is operating within the nominal range.