NB500k PV On-grid Inverter

Inverter:
1 Max.conversion efficiency of 98.6%;
2 Using an accurate MPPT technology;
3 Key parts are exported.
NB500K ON-grid Inverter

Features:
The control microprocessor built in NB500k inverter is the latest world famous brand 32-bit DSP chip, which is suitable for floating point arithmetic and has a better open and close loop control in the inverting process due to the advantages of lower self consumption, faster calculation and more accurate sampling. The IGBT selected is the latest Infineon product that will further improve the efficiency and stability because it is more stable and has lower switching loss. In control arithmetic, comprehensive applications of space vector PWM technology, optimal efficient data process method, fuzzy PI control theory and humanized design thought have ensured the product features of high quality, stability, reliability and affinity.
Advantages:

1 The power unit is well designed with heat flow simulation, which has a better thermo-stability than traditional one. The controlled air cooling and efficient air flue design has not only effectively reduced the energy loss but also decreased the self loss of inverter, therefore to extend the `lifetime of power unit.
2 The well proven voltage loop and current loop control technology, which is critical to high efficiency conversion, has maximally drawn energy from the polar PV module with the pre-transformer efficiency reaching 98.6%.
3 Thin-film capacitor, which has longer life time that electrolytic one and no leakage trouble, is designed in the system to inhibit flicker voltage and ripple current, so as to ensure a better reliability and stability of the system.
4 The driven signal of power module is transferred by optical-fiber, which will effectively reduce electromagnetic interference in the power conversion so as to increase system stability.
5 Perfect active and passive solution of “island detection” has been used, which is significant to protect the safety of maintenance people and equipment.
6 Perfect protection solution of circuit breaker and contactor designed at both AD and DC side for emergency case.
7 With optimally selected components, the system can work in different environment conditions. It has the ability of high altitude and low temperature start. The assistant heating function is optional.
8 It has a friendly human-machine interface and touch screen operation display. It built with different optional communication interfaces. With abundant statistic data, it is able to simultaneously remote measure and control several inverters equipped with the “plant monitoring” software.
9 Modular design, easy for daily maintenance and management.
No.
Technical Parameters
Indexes

Parameters for DC side

1
Max.DC voltage
900V
2
MPPT voltage range
450~820V
3
Max.DC power
550kWp
4
Max.input current
1250A
5
Max.input channels
16

Parameters for AC side

6
Rated output power
500kW
7
Rated grid voltage
400V(including transformer)/270V(no transformer)
8
Grid voltage
310~450Vac (including transformer) ()/210~300V( no transformer)
9
Rated grid frequency
50/60Hz
10
Grid frequency
47~51.5Hz/57~61.5Hz
11
Waveform distortion rate of total current
3%
12
Power factor
≥0.99

System

13
Max.efficiency
97.4%( including transformer)/98.6%( no transformer)
14
European efficiency
96.8%( including transformer)/98.4%( no transformer)
15
Protection grade
IP20
16
Power consumption at night
100W
17
Environment Temp.
-25 ~ +55°C
18
Cooling method
Controllable wind cooling
19
Relative humidity
0~95%,No condensing
20
Noise
Below 85 dB
21
Altitude height
Max. altitude height of 1000ms
22
DC separation system
Breaker
23
AC separation system
Breaker, contactor

Display and Communication

24
Display
LCD Touch screen
25
Standard communication method
RS485/CAN/Ethernet

Dimensions

26
W H D
2800 2200 850
27
Gross height
1650kg