EPS 500kVA Emergency Power Supply Linkage Fire-protection  Power backup Emergency light

NET brand EPS NT D500VA-500kVA safe-guards fire-protection device and backup emergency-light
System Advantage

Fits harsh condition

Rectifier/Charger

VRLA battery string

Inverter(with output isolation transformer)

NT D500VA-500kVA 3Ph emergency power supply systems are a team-work between us and German professionals. The system adopts well international integrated Inverter Module, latest IGBT inversion technology, and CPU control, digital circuit, high integrated component. Real high-tech, environment-friendly, and patent products. The system guarantees primary loads, especially mission-critical power-reliable equipment of fire-protection and emergency-light with secondary or third backup power.

Mains ac input supplies to loads via system’s intercast device when ac is normal, meanwhile, charger re-charge battery intelligently. When ac mains input voltage fluctuates/exceeds 25% or ac blackouts, ac detector will instruct inverter with a signal, inverter runs then intercast device transfers to inverter-mode, inverter feed pure sine wave power to loads with batteries discharged. When ac mains input recovers, system returns to ac mode again.

NT D0.5-500kVA works in 3Ph+N(GND), batteries fixed internal, autonomy exceeds 90 minutes normally. The system inbuilt with LCD display, power compensator, rectifier, charger, Net brand batteries of 500-1000 cycles and inverter, monitor and PDU. System design life exceeds 20 years.

Main Features

Rectifier/Charger

Battery charger adopts high-frequency Switch Mode charger module, recharge batteries in average and float stage intelligently, charger rating meets EPS demand.

■  Auto-transfer between average-charge and float-charge.

■ EPS runs independently with monitor unit removal.

■ Charge current limits

■ No over-charge

■ Protection: short-circuit, over-current, under-voltage and over-temperature etc.

■ Battery charge voltage with automatic temperature compensation.

Battery strings

■ Standard configured with 12V VRLA Maintenance-free batteries.

■ Float-charge cycles attains 15 years.

■ 80% deep discharge exceeds 300 cycles.

■ Battery easy storage, self-discharge <2%.

■ Battery works in -15℃～50℃ to meet EPS demand very well.

■ Battery adopts best conducting ability material for indirect lead board and terminals, anti-corrosion well.

■ Battery no deformation, no crank, no stain, correct pole, transparent mark on positive-pole and negative benefits battery connection.

■ Battery works in an isolated connection between blocks, may parallel to more strings, no circulation current..

Inverter

Inverter adopts latest IGBT thyristors of high quality best performance. Converting DC voltage from batteries discharge to 1ph/3ph sine wave ac voltage, inverter rated power meets EPS demands well.

■  Novel IGBT meets emergency light loads(sensitive, capacitive and non linear load), load power factor 0.95-1..

■ Inverter efficiency exceeds 95%..

■ Inverter limits THDi lower than 3% with 100% linear load, without any ac filter.

■ Inverter’s bridge-arm has no protection, therefore, we suggest vendor avoid any damage on bridge-arm’s solid state board by over-current.

■ No fuse or circuit breaker fixed with inverter output circuit. .

■ Fuse no hint of burnt benefits to trained technician’s maintenance job.

■ Inverter output no isolation transformer.

Fits harsh condition

TL10-80kVA ups PCB boards strictly storage in a complete closure after conformal procession, finest workmanship and excellent electrical performance meets harsh condition commissioning in power industry site, traffic channels, or Radio TV Station built in mountain-side.

EPS temperature-rising complies to IEC947-1 regulation, terminals to link external insulated cable less than 70K, cooper wired Bus line less than 50K, metal kits less 15K, insulation material less than 25K, metal surface of touchable cabinet wall and cover board less than 30K, insulation material surface less than 40K, cabinet IP-class exceeds IP-55.

Technical parameters

Model		NT-D-0.5～500KVA
		AC INPUT
Nominal ac		380Vac(220),400Vac(230),415Vac(240)
Voltage range		220V/380VAC±25%(option:Single or dual-inputs)
Frequency range		50Hz±10%
Nominal dc		48VDC	192VDC			360VDC
dual-inputs interaction		Option
STS		Option
		OUTPUT
Voltage precision		Normal：220V±1%			Emergency：380V±1%
Frequency stabilization		Auto-detect AC input frequency(normal/AC-mode), 50Hz±1%(Emergency)
Output path		4(addable)			6(addable)
Output path feature		Continuous, interruptible, linkage fire protection
Efficiency(rated-load)		>95%(Emergency), approximate 100%(Normal)
THDi		≤2%
Transfer time		10ms-20ms(default) or per clients' target.
Over-load		101%-120% runing normally, 150%: 10 minutes, 200%:1 second
Backup time/autonomy		60min/90min/120min(per clients' target)
Battery inspection		Pre-set periodic inspection(per year, per month), manual inspection.
Linkage control		Linkaging 24Vdc fire protection control signal slot.
Forced start		Battery EOD protection will off when forced start emergency mode manually.
Protection		Input under/over voltage, verload,short circuit, battery low, over-temperature
Display		LCD display, LED indicators
Remote monitor		Communication slot: RS232/RS485, Protocol: Modbus
Noise(1m)		Ac normal: quiet noiseless, AC blackout: <45dB or 50dB(75kVA above)
Cooling		Forced air cooling
Work temperature		-40℃～50℃
Relative humidity		0～95% (non condense)
Altitude		≤3000m, or 3000—5000m(intensifying ventilation device or derated operation)
Compliance		GB17945-2010
IP class		>IP55
Application		Emergency light or single phase		Emergency lights, capacitive, sensitive(motor)
Install type		Inserted, wall-mounted or tower		Tower
Cable-entry		As per clients' target.