GR91

Forced Air Power Static Converter GR91


The GR91 converters are forced air cooling static converters, designed to meet the needs of customers who use these bridges for applications such as:

  • Three-phase diode bridges
  • Semi-controlled DC Bus power supplies
  • Three-phase thyristor bridges
  • Three-phase static switches
  • Single-phase unidirectional bridges
  • Single-phase static switches

These are bridges created for low power low voltage applications. The current range is ranging between 60A and 700A depending on the circuit type.
Dimensions and performances are strictly connected to the application and to the circuit configuration type.
Eaton Bussmann High-Speed fuses are generally connected to the bridge input, in order to protect the semiconductors.
Each converter is equipped with a thermal protection suitably designed to ensure its thermal and electrical characteristics.

Technical data
Ambient condition
Altitude 1000 m. a.s.l.
Climate Temperate
Min./Max. operating temperature 0 ÷ 40°C
Storage temperature -40 ÷ +55°C
Relative humidity 10 ÷ 90% (from 0 to 40°C)
Main general data
Converter type Three-phase diode bridges
Semi-controlled DC bus power supplies
Three-phase thyristor bridges
Three-phase static switches
Single-phase unidirectional bridges
Single-phase static switches
Bidirectional thyristor bridges
Main supply voltage 380 ÷ 480V 500 ÷ 690V
Other voltages on request
Tolerance ± 10% power supply
Rated current 60A ÷ 700A
Rated frequency 50 and 60 Hz; ± 2%
Insulation voltage 2.5 ÷ 4 kV
Protection degree IP00
Diode/thyristor protections RC snubber; fuses
Converter protectionOvertemperature; ventilation failure
Cooling system Forced air
Installation type Open frame module
Dimensions Different for current size and type
Weight Different for current size and type

Request a quote on your project. Click here