START PAC 3328 Special 28V DC Power Supply/Battery Pack
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This START PAC ground power unit (GPU) is designed primarily to perform battery-starting functions. When connected to AC power, depleted batteries can be charged in four hours with the built-in power supply/battery charger.
This turbine starting unit is designed to provide superior starting for large turbine engines including the TPE 331.
Batteries
- 78 Amp Hours at a 10-Hour Rate
- 28.5V DC to 30.5 Volts At Rest
- Sealed Cells (Non-Hazardous)
- Valve-Regulated High-Amperage Output Lead Acid
- 2,800 Peak Amps
Power Supply/Charger
- 15 Amps DC Continuous Output at 28.5V
- Battery Recharge Time: 4 Hours
- AC Input: 110V or 220V
Limitations
- 250 Amps Maximum Continuous DC Load
This GPU is rated at 2,800 peak starting amps and is a full 28V battery pack (28.5 volts, to be exact). Due to the extra starting power provided by the 28.5V batteries, turbine engines will experience faster, cooler starts and extended turbine life. This model is primarily designed for superior starts on large turbine engines and the Garrett TPE 331.
This airplane starting unit is more economical than the 3328 as it does not incorporate the high-output DC power supply. Also, this unit can be configured for 110 Volt or 220 Volt AC input. This unit weighs 185 lbs. (83.9 kg).
Always recharge the GPU until the green light appears. Once charged, it is not necessary to leave the unit plugged in. If the heater is installed, turn the unit off but leave it plugged in. Avoid discharging the batteries completely, as damage to the cells can result. Always recharge batteries soon after use.
Battery Disconnect: When operating the continuous power supply at 105 amps and below, activate the battery disconnect. Since the 28.5V batteries actually read 30.5V at rest, leaving the battery disconnected will deplete the batteries nearly 50% before their voltage reaches 28.5V. In this situation, only half of the battery capacity will be available for engine starting. By keeping the batteries separated from the continuous power supply, you will have full battery capacity for engine starts. If you need more than 105 continuous amps, use the battery disconnect – the batteries will make up any amperage needed.
There are approximately thirty 110V and thirty 220V NEMA plugs in use. Also, customers have various receptacles at their hangars and MRO facilities and may require specific AC cord lengths to meet their requirements. Due to these facts, we do not automatically provide AC power cords. If you provide the NEMA plug number and specify the AC power cord length you require we will build a cord to be shipped with your unit for a small fee.
NOTE: Please use a #12 or larger AC extension cord.
| General Information | |
|---|---|
| Part # | 3328-Special |
| Manufacturer | Start Pac |
| Warranty | |
|---|---|
| Details | 1 Year Limited Warranty - View Details |
| Shipping Information | |
|---|---|
| Schedule B | 8507200090 |
| ECCN | EAR99 |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* |
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QUESTIONS & ANSWERS
The 3328 Special unit is equipped with dry lead-acid batteries that are free from thermal runaways. Therefore, the power supply/battery pack is not considered HAZMAT.
Some of the newer Beechcraft King Air and King Air conversions are voltage-sensitive. When our 28V units are fully charged, they will read about 30.5V. As long as there are no voltage sensitivities, the 3328 Special would be the best option. However, if there is a voltage sensitivity, then you would need to order the 3326 Special from Start Pac.
