- EMAIL: SALES@CRESSALL.COM
- • TEL: +44 (0) 116 273 3633
RECIRCULATING BRAKING RESISTORS
The closed air/closed water (CACW) system can be used within a braking resistor to limit the braking resistor energy absorbed by the resistor being transmitted into the surrounding machinery room where an increase in ambient temperature could have detrimental heating effects on other installed equipment.
Using CACW can ensure up to 95% of the braking resistor energy is removed from the air and transmitted into the cooling water supply of the ships system over a period of 30 minutes after energy application.
For large vessels, where many Mega Joules are involved, preventing this energy going into the ambient air can limit the air changes per hour required in the machinery room, keeping the room as close to its normal temperature level as possible.
FORCED CONVECTION FAN COOLING
These units are suitable for both protected area and deck mounting and would include anti-vibration mounts to prevent vibration transmission to the floor, with enclosures and all fittings and fan in 316 grade stainless steel:
- Total continuous power: 200kW – 1500kW
- Maximum number of electrically separate sections: 14
- Voltage rating: 800V DC or 690V 3 phase AC
- Elements: Mineral insulated with Alloy 825 sheath, test voltage 2.5kV
- Cable box: IP56 complete with automatic anti-condensation heater and terminals for one termination of capillary thermostat and PT100 temperature sensor for air temperature sensing.
FAN COOLED BRAKE RESISTORS, POWER RATINGS AND DIMENSIONS
| LENGTH | BASE | TOTAL | HEIGHT | FAN MOTOR | FAN DIA. | |
| mm | width mm | width mm | mm | kW | mm | |
| 300 | 1888 | 722 | 1098 | 1181 | 3.6 | 710 |
| 600 | 2203 | 1016 | 1341 | 1840 | 7.5 | 710 |
| 1000 | 2950 | 1016 | 1341 | 1840 | 18 | 800 |
| 1500 | 3656 | 1216 | 1541 | 1840 | 18 | 900 |
NATURAL CONVECTION COOLING
For small inverter drives we can offer our standard ES range, intended for indoor use only within protected areas and would usually be incorporated within or on the roof of the inverter drive system control panels. The standard ES range enclosures are in galvanized sheet steel but for marine and offshore these would be either optionally 304 or 316 grade stainless.
For small inverter drives we can offer our standard ES range, intended for indoor use only within protected areas and would usually be incorporated within or on the roof of the inverter drive system control panels. The standard ES range enclosures are in galvanized sheet steel but for marine and offshore these would be either 304 or 316 grade stainless.
For higher powers and voltages we can design have custom-built designs resistors for on deck mounting, optionally as described below with air-to-water heat exchangers
- Total continuous power: 1kW – 150kW
- Maximum number of electrically separate sections: TBA
- Voltage rating: 800V DC or 690V 3 phase AC
- Elements: Mineral insulated with Alloy 825 sheath, test voltage 2.5kV.
- Cable box: IP56 complete with automatic anti-condensation heater and terminals for termination of capillary thermostats and PT100 temperature sensor for air temperature sensing.