1 INTRODUCTION
1, GPAD351M27-5A is a high-duty power supply with AC/DC multi-outputs. Thanks for the latest circuit design, it is compact and of reliable performance. It has the wide range of input voltage and has many functions including short-circuit protection, over-current protection and lightningproof function, accumulator charge. The cooling way is natural conductive. The power supply is designed strictly in accordance with the safety regulations, which conforms to the safety standards and requirements of information technology.
2, When the AC power is off, it can switch over and supply power by the main battery automatically(six outputs). If the main battery discharge when being insufficient to get voltage, it can automatic protection and stop discharging. And then it switch over and supply power by the lithium ionic battery, and now it has tri-outputs(+5V, +12V), If the lithium ionic battery discharge when being insufficient to get voltage , it can automatic stop discharging.
2 SPECIFICATION REQUIREMENTS
2.1 Environmental Requirements
2.1.1 Operating temperature:-40ºC~+55ºC
2.1.2 Storage temperature:-45ºC~+85ºC
2.1.3 Relative humidity:10%~95%
2.1.4 Absolute altitude:≤3000m
2.1.5 Atmospheric pressure:70~106KPa
2.1.6 Cooling:natural conductive
2.2 Input Requirements
2.3 Output Requirements
2.3.1 Basic output requirements
Remark: Measured within the rated voltage input and load, with 0.1UF filmy capacitor and 10UF/63V high frequency electrolytic capacitor output, bandwidth of oscillograph set at 20MHz.
2.3.2,accumulator management
2.3.3,Other requirements
2.4 Protection
2.5 SAFETY
Remark: remove the discharge tube at the time of testing.
2.6 EMC
2.7 Other requirements
1, GPAD351M27-5A is a high-duty power supply with AC/DC multi-outputs. Thanks for the latest circuit design, it is compact and of reliable performance. It has the wide range of input voltage and has many functions including short-circuit protection, over-current protection and lightningproof function, accumulator charge. The cooling way is natural conductive. The power supply is designed strictly in accordance with the safety regulations, which conforms to the safety standards and requirements of information technology.
2, When the AC power is off, it can switch over and supply power by the main battery automatically(six outputs). If the main battery discharge when being insufficient to get voltage, it can automatic protection and stop discharging. And then it switch over and supply power by the lithium ionic battery, and now it has tri-outputs(+5V, +12V), If the lithium ionic battery discharge when being insufficient to get voltage , it can automatic stop discharging.
2 SPECIFICATION REQUIREMENTS
2.1 Environmental Requirements
2.1.1 Operating temperature:-40ºC~+55ºC
2.1.2 Storage temperature:-45ºC~+85ºC
2.1.3 Relative humidity:10%~95%
2.1.4 Absolute altitude:≤3000m
2.1.5 Atmospheric pressure:70~106KPa
2.1.6 Cooling:natural conductive
2.2 Input Requirements
| Item | Unit | Min | Typical | Max | Testing Conditions |
| Input voltage range | Vac | 145 | 220 | 290 |
2.3.1 Basic output requirements
| Output voltage | Output voltage range | Output current range | Regulator precession | Load regulation | Voltage regulation | Ripple |
| +27V | 26.8V~27.4V | 0A~10A | ≤±2% | ≤±2% | ≤±1% | ≤50mV |
| +12V | 11.88V~12.2V | 0A~6A | ≤±2% | ≤±2% | ≤±1% | ≤30mV |
| +5V | 4.95V~5.15V | 0A~1A | ≤±2% | ≤±2% | ≤±1% | ≤30mV |
| MODEM | 11.8V~12.25V | 0A~1.2A | ≤±2% | ≤±2% | ≤±1% | ≤30mV |
2.3.2,accumulator management
| Item | Unit | Technology requirement | Remark |
| Charge voltage | V | 24V plumbic acid battery BAT1, 26.5V~27.5V | VIN=145V~290Vac,all load conditions |
| 24V lithium battery BAT2, 24V~24.6V | |||
| Charge current | A | 24V plumbic acid battery BAT1, 0A~1.5A | VIN=145V~290Vac, all load conditions |
| 24V lithium battery BAT2, 0A~0.3A | |||
| The point of under-voltage protection | V | 24V plumbic acid battery BAT1, 21.5V~22.5V | +27V with 1A,others without load |
| 24V lithium battery BAT2, 17V~17.5V | +5 with 1A,others without load |
2.3.3,Other requirements
| Item | Unit | Min | Typical | Max | Testing Conditions |
| Output Power | W | - | 400 | ||
| Output Efficiency | % | 80 | - | Rated input/output | |
| Temperature coefficient | /ºC | ±0.02% |
| Item | Unit | Min | Typical | Max | Recovery characteristics |
| Input over-voltage protection | V | 290 | 305 | +27V with 4A,others without load. | |
| The recovery point of input over-voltage protection | V | 280 | 290 | ||
| Input under-voltage protection | V | 135 | 145 | +27V with 4A,others without load. | |
| The recovery point of input under-voltage protection | V | 150 | 165 | ||
| +27V output over-voltage protection | V | 29 | 31 | ||
| +27V output limited current protection | A | 14 | 18 | Rated load, output the accumulator BAT1, limit the current below 24V, other outputs with min. load. | |
| +9V output limited current protection | A | 6 | 9 | Rated load, outputs with min. load, every output limit current by each. | |
| +5V output limited current protection | A | 2 | 5 | ||
| MODEM output limited current protection | A | 2 | 5 | ||
| Over-heating protection | ºC | 95 | 105 | Auto recovery | |
| The current of short-circuit protection(+27V) | A | 10 | Rated input, every output is short circuit. | ||
| The current of short-circuit protection (+9V) | A | 10 | |||
| The current of short-circuit protection (+5V) | A | 5 | |||
| The current of short-circuit protection (MODEM) | A | 5 |
2.5 SAFETY
| Item | Level | Standards(or testing conditions) |
| Insulation voltage ( output to ground) | 500Vdc | 500Vdc /1Min / Leakage Current≤10mA |
| Insulation voltage ( input to ground) | 2000Vac | 2000Vac /1Min / Leakage Current≤10mA |
| Insulation voltage ( input to output) | 3000Vac | 3000Vac /1Min / Leakage Current≤10mA |
| Insulation resistance | 2MΩ | Under normal atmospheric pressure, and when the relative humidity is 90%, and the testing voltage is DC 500v, for the power supply, the insulation resistance of input to output, input to ground, and output to ground is no less than 2MΩ. |
| grounding resistance | 0.1Ω | The grounding resistance of each power supply is less than 0.1Ω |
| Tangent current | 1.5mA | The tangent current of each power supply is less than 1.5mA |
2.6 EMC
| Item | Index requirements | Standards |
| CE | CLASS A | EN55022 |
| RE | CLASS A | EN55022 |
| ESD | There is no influence on the operation of power supply when charge on the case after power supply is encased Tangent discharge:±8KV Air discharge:±4KV/±15KV | EN61000-4-2 |
| SURGE | LEVEL 3:Line-line 2KV Line-ground 4KV | EN61000-4-5 |
| Item | Index requirements | Performance |
| Noise | The noise of power supply should be less than 55dB(A), the condition is in the range of input voltage and output voltage and current, the distance is 1 meter from front , back, right and left, and 1.5 meter from upper and underside. | Pass |
| MTBF | 100,000H | |
| Vibration | >Frequency : 5 to 9 Hz >Amplitude : 3.5mm,9~200Hz >Direction : 3 directions >Sweep time : 50minutes(50minute per one way) > acceleration:10m/s2, > there is no influence on power supply. | Pass |
| Shock | Half-sine wave,acceleration: 20G,Amplitude 11ms,Direction : 3 directions(X,Y,Z) 3 times per one direction | Pass |
| Dustproof | Has some function of dustproof | Pass |
| Odor | No peculiar smell and deleterious gas | Pass |