131B7749
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The 131B7749 is a three-phase HVAC drive with a power rating of 11 kW and an enclosure rating of IP55/Type 12. Manufactured by Danfoss as part of the VLT FC 102 HVAC Drives series, it features a graphical local control panel. The drive weighs 22.4 kg and includes a mains disconnect for added safety.
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Product Description:
The 131B7749 HVAC Drive demonstrates dependable mechanical strength and offers a nominal shaft delivery of 11 kilowatts. This Danfoss drive continues to supply the same output even when briefly pushed 10% beyond its rated threshold. It has an impressive thermal efficiency as it loses only 278 watts of energy as heat at peak loading.
The 131B7749 HVAC drive casing around is designed to resist dust infiltration and is shielded against jet of water. It can provide a current of 26.4 amperes on the motor side when pushed beyond normal demand for short bursts. It requires 22 amps from the power supply while operating steadily under standard circumstances. Its apparent power rating is 16.6 kilovolt amperes which reflects the combined real power and reactive power it is able to handle. When the main disconnect device is in place it has a short circuit rating of 65 kiloamps which describes the amount of fault current it can withstand safely. It is able to convert 98% of incoming electrical energy into usable output with only 2 percent being lost which shows its excellent energy savings and lower operating costs. Its built in radio frequency filter reduces electrical noise emitted back into the mains.
The 131B7749 HVAC drive can deliver mechanical strength of 15 horsepower when connected at 460 volts. The presence of a user friendly graphical interface enables the configuration, monitoring and adjustment very easily. It can supply 24 amps to the motor terminals for ongoing operation in the specified voltage range (3x380–439 V). It includes an integrated main disconnect switch which allows it to be safely isolated from its power source when needed for maintenance or emergencies.
Frequently Asked Questions about 131B7749:
Q: How does the 131B7749 HVAC Drive handle electrical faults?
A: It includes a high short-circuit rating, meaning it can safely tolerate significant fault currents without catastrophic failure. This provides confidence when installed in large electrical networks.
Q: Can the 131B7749 HVAC Drive sustain overload conditions?
A: It is designed to briefly manage higher-than-rated loads without tripping. This allows motors to handle sudden surges in demand, such as fan startup or damper changes.
Q: What role does the integrated RFI filter play?
A: It suppresses electrical noise from being transmitted back into the mains. This is crucial in buildings with sensitive electronics or communication systems.
Q: How does the 131B7749 drive’s apparent power rating impact system design?
A: The kVA rating helps determine transformer and breaker sizing. Designers use it to ensure upstream components can reliably supply the drive under all operating conditions.
Q: How does intermittent input current capability benefit HVAC applications?
A: It allows the drive to handle temporary spikes in demand, such as compressor cycling or fan speed ramping. This ensures smooth performance without oversizing equipment.
