NIC12KVA48V- 120 12KVA and NIC6KVA48V-60 Inverter/Charger for

Solar/Generator and Grid Assisted Power Feeds.

Description

The Netshield NIC12KVA48V-120 and (NIC6KVA48V-60) is an inverter and battery charger combination product designed to form the core of a reliable power

feed of 12kVA (6kVA) continuously and up to 36kVA (18kVA) instant power with a battery charging capability of up to 120Amp (60Amp). The unit can source power from either;

a back-up power utility feed, or from a back-up generator, or from Photo Voltaic solar arrays.

The unit creates a flexible power sourcing solution with a scalable battery bank acting as a power source when no power is available from any of the power sources.

Features

Grid assisted application mode Generator assisted application mode Offline UPS application mode Over Load Protection Over Voltage Protection Under Voltage Protection Short Circuit Protection Over Temperature Protection Zero Spark Connection Forced Cooling Battery Level Indication Load AC Output Grid and Generator AC Input Connection Generator Start Relay Output Comprehensive LED Display Keypad and LCD Display

Systems application illustration

NIC12KVA48V-120

SpecificationInverter

Nominal Battery Voltage : 48 Vdc

Input Voltage Range : 30 – 75 Vdc

Operating Voltage Range : 40 – 66 Vdc

Output Voltage : 220 – 230 Vac Settable, 50 Hz

Waveform : Pure Sine Wave

Total Harmonic Distortion : < 3%

Continuous Power @25°C : 12000 VA (6000 VA)

Maximum Output Power : 36 kVA (18kVA) for 5 s

Efficiency : >92%

Power Consumption – idle : 78W (39W)

ChargerInput Voltage : 180Vac – 270Vac

Input Frequency : 45Hz – 55Hz

Input Current : 35 Amps ac (17.5Amps ac)

Charging Current : 120 Amps (60 Amps)

Charging type : 3 Stage

GeneralEnclosure : Powder coated mild steel

Dimensions (w x h x d) : 760mm x 360mm x 460mm(630mm x 320mm x 350mm)

Feet : Rubber

Weight : 105 kg (55kg)

NIC12KVA48V-120

Application

The Netshield NIC12KVA48V-120 and NIC6KVA48V-60 can function in three application modes:

Generator Assisted Inverter The Generator assisted mode is used when there is no grid connection, commonly known as an off grid solution, the batteries are charged from Photo voltaic Solar Panels and/or wind generators, the load requirements are permanently serviced from the Inverter. In the event where the renewable resource power and/or the battery soured power is insufficient to service the actual required load the addition of an appropriately sized back-up generator will be required to service this load. The unit will automatically start the generator and automatically transfer the actual load to the generator and use the additional generator capacity to recharge the systems batteries, on reaching the pre-selected State of charge of the batteries, the load will automatically switch back to the Inverter, this switching happens automatically and the changeover is seamless while the generator is allowed to run for a pre-selected cool down cycle, with no load connected, before the shutdown commanded is signalled to the generator.

Offline UPSThe Offline UPS mode is used when there is an unstable grid connection or where the utility power supplier implements load shedding, the Inverter/Charger is used as a backup power source. While the grid is available, the Charger will keep the batteries (not included) fully charged and the load will run from the grid. When the grid power feed fails, the Inverter will automatically supply the load by switching into online mode within 12 milliseconds. The backup time is scaled depending on the sizing of the connected battery bank and the actual load requirements.

Grid Assisted InverterThe grid assisted inverter mode is used when there is a grid connection with the requirement to add additional renewable energy resources, like Photo Voltaic Solar Panels, you will run your load permanently from the Inverter, which runs from the battery and renewable resource. In the event that the alternative resources and batteries can supply sufficient power the Inverter/Charger will automatically switch the load over to the grid and recharge the batteries to the pre-selected state of charge of the batteries. When this state of charge is reached the required load will be switched automatically and seamlessly back to the Inverter.