ups power, modular ups manufacturer

EA850 UPS for electric power industry is designed by EAST to meet the needs for the development of Chinese electric power industry. The EA850 series electric power ups is specially designed for electric power plant, transformer substation, and power distribution substation. This dependable system has true double-conversion online technology and zero transfer function. This system is suitable to be used in electric power remote control, RTU, electric power carrier wave, electric power surveillance, etc. When the commercial power is in regular conditions, single phase or three phases input will go through inverter after isolation, rectification and wave filtering to provide power for the load. When the commercial power is in irregular conditions or there is a power-off, the backup DC screen in the power system will provide power through the inverted diode and inverter. When the voltage of DC screen becomes too low or there is a power-off, the static switch will turn to the bypass to provide power supply. When the commercial power resumes regular conditions, the UPS system will switch to commercial power supply and provide power for the load through UPS inverter. When the inverter works overload or there is a failure of the UPS, the electric power ups will switch to the bypass to provide power for the load, and this electric power ups will give out alert signal at the same time.  
 
Features & Benefits
 
1. Electric power standard cabinet
2. DSP digital control
3. Intelligent self-test and surveillance
4. Digital controlled static switch zero switchover
5. Inverter driven by high speed IGBT
6. Non-powered connection points and RS232/485 surveillance ports
7. Absolute input and output isolation
8. Absolute DC screen and power network isolation
9. Multi-protection towards over-voltage, under-voltage, over-current, short circuit, etc.
10. Big LCD control panel
11. Easy to read mechanical parameter display
 
Rectifier
Single phase/three phase AC power input to rectifier through isolated transformer, when the fluctuation of commercial power voltage is within 10%, and the change of system load is within 0 to 100%, the fluctuation of DC output voltage of the rectifier will be within 1%.  
Inverter
With high frequency carrier wave sine wave pulse width modulation technology, the inverter with IGBT modules inside can transform DC input to standard sine wave AC output, and at the same time the distortion will decrease to the greatest extent, the rectifier becomes smaller.
DC Screen
When the AC power supply network is under-voltage or there is a power failure, the DC screen connected to the DC terminals will continuously provide power. The DC screen will give out signal when discharging. When the DC screen reaches its discharge limit voltage, the UPS system will switch to its backup battery to work. When backup battery set reaches end discharging voltage, the UPS system will give out alarm signal.
Commercial power/Backup power
When using machines with dual AC input (commercial power as main source, the other as backup source), the UPS will switch to backup power source when the main commercial power goes irregular or there is a failure. When both AC power sources go wrong, the DC screen begins to work.
Static Switch
The static switch can switch between bypass mode and inverter mode without interruption, and the switchover can be realized automatically or manually.
Intelligent Surveillance
With RS232/RS485 port, non-powered connection points, the electric signal transmitting system will send the ongoing condition and data to D.C.S system, thus achieving intelligent surveillance. 
 
Technical Specifications

Model	EA8510	EA8515	EA8520	EA8530	EA8540	EA8550	EA8560	EA8580
Capacity	10KVA	15KVA	20KVA	30KVA	40KVA	50KVA	60KVA	80KVA
Working mode and principle	On-line power supply with static bypass switch, zero transfer time, dual conversion, absolute input output isolation of power source
AC input
Number of phases	Single-phase/three-phase +N+G
Voltage	220V/380V±25%
Frequency	50Hz/60Hz±5%
Input PF	≥0.92(with input filter)
Soft switch-on	0%-100% 5sec
Bypass input
Number of phases	Single phase/three phase
Voltage	220V±20%/380V±20%
Frequency	50Hz/60Hz±5%
Inverter/bypass transfer time	0ms
DC system
DC voltage	220V
Cut-off voltage	185V
Maximum discharging current（A）	36	55	73	110	145	181	218	291
AC output
Number of phases	Single phase/three phase
Phase voltage	220V±1%（stable load), 220V±3%（fluctuant load）
Frequency	50Hz/60Hz±0.05(battery)
Output PF	≥0.8
Output wave form	Sine wave
THD	﹤2%(linear load), ﹤4%(nonlinear load)
Voltage transient from dynamic load（0-100%）	﹤5%
Instant recovery time	﹤10ms
Overload capacity	10min (125% of designed capacity 10min)，150% 1min (150% of designed capacity 10min)
system
Full load capacity	91%	91%	92%	92%	92%	93%	93%	95%
Communication port	Non-powered connection point/RS232（option for remote surveillance）
Operation temperature	0℃-40℃
Relative moisture	30%-90%（no congelation）
Altitude height	﹤2000m, a 1% decrease against 100 meters' rise of altitude, altitude limit 4000m
Cooling-down method	Compulsive ventilation（with temperature control）
Noise level	48dB-55dB		53dB-65dB			55dB-65dB
Exterior condition
Cabinet color	Grey white ( as required)
Dimension (W×D×H)mm	600×600×2200/800×600×2200/800×800×2200					100×800×2200/1200×800×2200
Weight (Kg)	258	350	400	480	580	650	900	950
Options	RS485/network adaptor（SNMP）/harmonic compensation cabinet/input output power distribution cabinet/input output isolation cabinet/lightning proof/bypass stabilizer cabinet/customizable cabinet size