Lift ARD-Automatic Rescue Device 

Microcontroller PFC Based Charger 

Switching Element

MOSFET

Control Type

DSP

Type of Charger 

PFC

Efficiency

95%

Battery Charging Stages 

5(Health Maintain Check for 7AH)

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Power Factor

0.8

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Battery

Low Cut Off

10V (Per Battery) +/- 2%

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Low Cut Off Recovery 

12V (Per Battery) +/- 2%

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Low Buzzer

10.2V (Per Battery) +/- 2%

High Cut Off

15.5V (Per Battery) +/- 2%

High Cut Off Recovery 

15V (Per Battery) +/- 2%

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Charging current by Grid

1 +/-2%

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Output

Output @ No Load

440V+/2%

Output Frequency

50V+/2%

Output @ Full Batt to Low Batt

440V+/-10%

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Output Low Cut 

300

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Output High Cut 

520V

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Output Low Retry

1Time

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Output Short Circuit 

1Time

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ARD Backup Time

3 Minutes 

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No Load Battery Current

2%

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Overload

3.6/KVA

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Mains

No. of Phase

3Phase-4Wire P,N

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Voltage range

120V-280V +/-2%

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Mains Low recovery range 

10V

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Mains High recovery range 

5V

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Frequency range 

50Hz +/-3%

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Battery Charging Stages 

5

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Inverter

Switching Element

MOSFET

Control 

PWM

Output Voltage  

220V+/2%

Phase

2Phase-2Wire P,N

Output Waveform

Sine Wave

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Frequency

50Hz

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Changeover UPS to Mains

<10ms

Changeover Mains to UPS

=12ms

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Output Power factor 

0.8 Pf

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Switch 

ARD ON/OFF

Indication

Inverter On, Battery Low / High, Overload, Mains Charging On, Mains On

Alarm

Battery Low, Overload, Charger On, Inverter On 

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Protection 

overload, Short Circuit Protection, Over Voltage, Mains Surge and Transient Protection (MOV Varistors), Reverse Polarity of Battery, Over temperature Protection, Under voltage and over voltage Protection 

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Operating Temp 

0-50C

Operating Humidity 

<95

Protection Class

IP20

NOTE: Due to continuous improvement in the product and design. These specification may deviate a bit from the actual product, but only in a better way.