• Home
• About Us
  • Our Products
  • Our Promise
  • Our Company
  • Our Locations
  • Our History
    • Early Years
    • Expansion
    • Recent Years
    • Present
  • Careers
• Products
  • MARKON
    • NAC
    • BL 105
    • SL 105 | TL 105
    • WL 105
  • STAMFORD
    • P0/P1 Range
      • 2 Pole Industrial
      • 4 Pole Industrial
      • 4 Pole Marine
      • Accessories
    • UC Range
      • UC22
      • UC27
    • HC Range
      • HC4
      • HC5
      • HC6 4 Pole
      • HC6 6 Pole
    • P7 Range
      • P7 4 Pole
      • P7 6 Pole
    • P80 Range
      • P80 Low Voltage
      • P80 Medium Voltage
      • P80 High Voltage
    • Variable Speed Generators
      • Permanent Magnet Alternator
      • Power Electronics
    • Control Systems
      • Self-Excited AVR's
      • PMG-Excited AVR's
      • STAMFORD AVR Selection
      • Accessories
  • AvK
    • DSG Generators
    • DIG Generators
    • Voltage Regulators
• Applications
  • MARKON
  • STAMFORD
  • AvK
• Customer Support
  • Aftermarket Parts
  • Customer Service
  • Technical Bulletins
  • Global Customer Support Directory
• Download
  • Data Sheets
  • Drawings
  • Manuals
  • AVR Manuals
  • Ratings Book
  • Fault Finding
• Contact Us

Expand All | Collapse All

STAMFORD AVR Selection

Automatic Voltage Regulator (AVR) & Accessory Selection Tables. The table below will indicate which AVR accessory is available for, or incorporated into each product range.
MX321 MX341 AS440 SX460 AS480 DM110 P0/P1 N N N S S O UC22 O O O S N O UC27 O O O S N O HC4 O O S N N O HC5 O O S N N O HC6 S N N N N O P7 O S N N N O MV7 S N N N N O P80 N N N N N S S = Standard | O = Option | N = Not available
AVR features   MX 321 MX 341 AS 440 SX 460 Transformer Controlled Comments/ Restrictions   Voltage Regulation 0.5% 1% 1% 1% 5% With 4% engine governing CSA Aproval Yes Yes Yes Yes Yes AVR Feature  Three Phase Sensing Yes No No No No AVR Feature
Sensing Excitation Limiting No No No No No AVR Feature Short Circuit Current Limiting Yes No No No No Additional CT Required  Under Frequency Protection Yes Yes Yes Yes No AVR Feature Load Acceptance Feature UFRO Yes Yes Yes Yes No AVR Feature
Add on accessories   MX 321 MX 341 SX 421 SX 440 SA 465 SX 460 Comments/Restrictions  Excitation circuit breaker Yes No Yes No No No For isolation of the excitation system, standard on the SX421 RFI suppressor kit Yes Yes Yes Yes Yes Yes   Seperate voltage trimmer Yes Yes Yes Yes Yes Yes For remote mounting Quadrature droop kit (3 phase) Yes Yes Yes Yes Yes No   Power factor controller - PFC3 Yes Yes Yes Yes Yes No Supplied loose on BC184 & SA465 Remote control interface Yes Yes Yes Yes Yes Yes For use with power factor controller Excitation loss module Yes Yes Yes Yes No Yes Select 12 V or 24 V Diode failure detector Yes Yes Yes Yes No No   Alternator protection module Yes Yes Yes No No No Select 380 V or 220 V Frequency detection module Yes Yes Yes No No No Select 12 V or 24 V Dual AVR (manual change over) Yes No Yes No No No Hard wired spare AVR Manual voltage regulator Yes Yes No No No No   Line drop compensation Yes Yes Yes Yes No Yes Counters line drop on long transmission lines * The excitation circuit breaker supports the overvoltage protection on the MX321 & MA327. Both functions are facilitated by the excitation circuit breaker on the SX421.