1) Internal CPU control
2) Advanced PWM technology for inverter output
3) AVR function
4) Low current switch control technology to extend the life of the switch
5) Thermal battery change technology, convenient for the user's to change battery (DH-500A/B, DH-500CA/CB)
6) Inner equipped charger of constant current and voltage, advanced battery management and low voltage protection system
7) RJ45/11 for telephone, fax and modem circuit protection
8) Smart RS232 interface for automatic file saving and power-off functions at your computer
9) Advanced battery management system with automatic re-charging function
10) Special protection against AC/DC overload and short-circuit protection against inversion state with high reliability
11) Display by LCD
Specifications:
1) Models: DH-500A, DH-500B, DH-500CA, DH-500CB, DH-1000CA, DH-1000CB, DH-1000A, DH-1000B
2) Max capacity: 500VA(300W), 425VA(250W), 1000VA(600W), 1200VA(720W)
3) Rated capacity: 315VA(200W), 315VA(200W), 800VA(480W), 1000VA (600W)
4) Input commercial power range: 145VAC-280VAC
5) AVR range: 155VAC-275VAC
6) Frequency: 45-65Hz automatic self-check
7) Commercial power: Sine-wave
8) Output inversion: Simulated sine-wave
9) Frequency: Commercial power supply: Shared frequency with the commercial inversion state: 50Hz+-0. 5
10) AVR: 220VAC+-10% (auto-sensing)
11) Transfer time: Typical: 10ms (including detection time)
12) Spike protection: 320 joules, 2ms
13) Filter: 10dB at 0. 15MHz, 50dB at30Hz
14) Overload: UPS automatic shutdown if overload exceeds 110% of normal value for 30 seconds and 130% for 3 seconds
15) Tel/Fax/Modem: RJ45/11jack (compatible with DH-500B/CB, DH1000B/CB)
16) Short circuit: UPS output is cut off immediately or input circuit breaker protection
17) Alarm:
A) Battery back-up: Beeping sound every 4 seconds under input disconnect
B) Battery low voltage: Beeping sound every 1 second when battery runs out
18) Battery type: Sealed maintenance-free lead acid
19) Capacity: (12V, 7Ah) *1, (12V, 5. 5Ah) *2, (12V, 5. 5Ah) *1, (12V, 7Ah) * 2
20) Recharge time: 8 hours to 90% of full capacity
21) Battery protection: Automatic self-test, discharge protection and battery replace indicator
22) Back-up time: Typical 10min (half)
