Liquid cooled rectifiers

Liquid-cooled rectifiers from Littelfuse

Liquid-cooled rectifiers utilize a cooling system that involves circulating a liquid coolant, such as water or oil, to dissipate heat generated during the rectification process. The rectifier components, such as diodes and transformers, are typically immersed or in direct contact with the coolant. The coolant absorbs the heat and carries it away from the rectifier, maintaining a suitable operating temperature.

Liquid cooled rectifier

Liquid cooling is commonly applied in high-power rectifier systems where the heat dissipation requirements are significant. The high thermal conductivity of liquids enables efficient heat transfer, allowing the rectifier to handle large power loads. Liquid cooling is often found in industrial applications.

Isolated and liquid-cooled rectifiers for maritime applications

To rectify the AC generated power that supplies your DC bus, Astrolkwx offers specially designed liquid-cooled three-phase rectifiers.

Since tap water is normally used to cool all power electronic equipment on board, these rectifiers have highly efficient isolated (aluminium nitride) water coolers and can supply up to 3500 A DC with 3×690 Vac input voltage. These rectifiers are very compact, easy to integrate and protected by snubbers and temperature sensors.

Some properties of the liquid-cooled rectifier

Electrical properties

• Maximum rms value of input line voltage – Each bridge : 690 (±10%) VRMS
• Rated input line current: 2781 A
• Rated output DC current: 3421 A
• Maximum water inlet temperature: 40 °C
• Water Type: Tap water
• Maximum system pressure: 10 Bar
• Ambient temperature range: -25 °C till +40 °C
• Approx. weight: 28 Kg

Download the datasheet

Download the datasheet for more product specifications and electrical properties.

Device ratings

• Diode Type: W3708MC300
• I2t = 4.5 x 106 A2s
• Device peak non-repetitive surge IFSM = 30000A

Snubber details

Aluminium Housed Axial Panel Mount Resistor, 15R ±5% 100W Capacitor type: 1μF, 2800Vdc, 1700Vac

Heatsink

Aluminium Nitride cooler type: XW127EN15A

Assembly Test Protocol

Pressure test at 8 bar for 1 hour, isolation test @ 6KV @pressure Light load test 690v ac 930v dc

Why use Littelfuse’s liquid-cooled rectifiers?

• Voltage and current range: 1.5 kV – 3.5 kA
• Compact design 429 x 290 x 253 mm (l x w x h)
• Tap water cooled
• Easy integration – Industry -standard housing for easy integration.
• Customized products – Littlefuse offers various customized products based on customer-specific and application-specific requirements.

Download our enquiry form

Download the enquiry form and send the fully completed form to info@astrolkwx.com