Digital Static Excitation System

Digital AVRStatic Excitation System for a Large Generator

Digital static excitation controller (model: YNEX11SD) for a generator having a large field current

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Product Features

In recent years, digital controllers have become the mainstream of demand, while demand for static excitation controllers is also increasing. We have already digitalized the exciting controller of a brushless excitation system, and have many delivery achievements. The digital static excitation controller (model:YNEX11SD) has been developed as a next generation model of the analog static excitation controller (model: YNEX97S series) while inheriting our techniques.

  • Implementation of multi functionality, high performance, and smaller size
  • Environmental consideration by using a RoHS supported product
  • Improvement of operability by a built-in large display
  • Improvement of maintainability by simplifying maintenance and enhancing the self diagnosis function

Applications and Solutions

 The above products are sold in conjunction with our generators and shall not be sold independently.


Item Specifications
Control power source Duplication of DC 110 V and AC 110 V
Operating temperature -10-60°C
Relative humidity 5%RH to 95%RH (no condensation)
Cooling system Natural air cooling
Applicable standards IEC61000-4-4,11, and 12, IEC68000-2-30, power regulation B402
External dimensions(control part) W225×H311×D175mm

List of functions

Item Specifications
Automatic voltage regulator(AVR) Control accuracy: within ±0.5%
Automatic field current regulation(AIFR) Control accuracy: within ±0.5%
Reactive power control(APFR/AQR) Control by a Q = A + BP method
Control accuracy (reactive power): within ±1%
Control accuracy (power factor): within ±2°
Voltage establishment control function Smooth starting method: time control to the rated voltage
Step starting method: field current limiter control
Selection of these two methods
V/F function Voltage droop method
Cutoff frequency: 60% fixed
Power stabilization function(PSS) Capable of selecting between 3 advance and delay / 4 advance and delay
Protection function Field overcurrent (51E)
Underexcitation current (37E)
Detection of abnormalities in phase control synchronous pulse
Detection of abnormalities in gate pulse
Detection of VT/CT failure
Failure trend control It is possible to confirm trends in failure occurrence by connecting a specialized maintenance tool.
Measurement signal: No. 8
Condition and failure signal: No. 32
Sampling period: 10 ms to 100 ms (variable)
Sampling points: 1,500 points before the failure, 500 points after the failure
Inquiries about this product
[PGPB Planning & Coordination Division]