30kW PV Inverter IPV-30kW-480

30kW PV Inverter
IPV-30kW-480
IDEAL POWER’S PV Inverter uses its patented Power Packet Switching Architecture™
(PPSA) indirect power conversion technology. PPSA delivers electrical isolation
without requiring a transformer, reducing installation costs, while improving energy
harvest, reliability and safety for commercial PV systems.
Lower Installation Costs
• S upports grounded arrays without a transformer
• >80% weight reduction compared to other 30kW
480V AC PV inverters that support grounded arrays
• Ships UPS/FedEx ground — no freight charges
• Simple 2 technician wall-mount installation — no
forklifts or concrete pads
• Flexible indoor or outdoor mounting options
Improved Energy Harvesting
• 96.5% CEC-weighted efficiency
• Wide DC Operating Voltage Range — minimizes low
voltage drop out
High Reliability Design Lowers O&M Costs
•
•
•
•
•
•
36.5 x 15 x 10.75 inches
97 lbs, wall-mount
Full Power operation at 50°C
NEMA-3R (rain rated) enclosure
o electrolytic capacitors
N
100% soft switching reduces component stress
Environmentally controlled electronics compartment
High overvoltage line transient withstand capability
Simple 60-minute installation/replacement processs
0–100% relative humidity operation
Improved Safety
• E liminates blindspot in fire safety with fault detection
on grounded conductors and <0.5A GFDI sensitivity
96.5% CEC-weighted Efficiency
97.0
96.0
Efficiency %
95.0
94.0
93.0
600 V dc
92.0
800 V dc
900 V dc
91.0
Developed and
manufactured in the U.S.A.
90.0
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
% of Rated Output Power
Single Stage
AC–ACtoConverter
for Wind
Turbines
Preliminary
— Subject
Change without
Notice
www.IdealPower.com
May
July 2011
2014
Inverter Installation
Recommendations
Basic Installation
A basic inverter installation single line drawing is shown in Figure
1.This design is desirable for single inverter installations or distributed installations with multiple inverters such as solar carports.
The inverter is typically located near the combiners with integrated DC disconnects, so additional DC disconnects are generally not required.
ics. During the startup process, and before closing the neutral
contactors, the inverter first checks the voltage on both positive
and negative arrays. If either, or both, array voltages exceed 500
volts, the inverter will not close the neutral contactors, and will
not commence its start procedure, protecting the inverter from
excess array voltage. If the voltages on both arrays are less than
500 volts, the neutral contactors are closed, and the inverter initiates its five-minute countdown sequence. Once that countdown
is complete, the inverter initiates Maximum Power Point Tracking,
reaching full available power within approximately 60 seconds.
Array Configuration
Positive Array (negative ground)
+
-
30kW PV inverter
IPV-30kW-480
+
+
+
+
-
Positive
Combiner
w/ DC
disconnect
AC
disconnect
+
-
utility
meter
+
+
+
+
-
Negative
Combiner
w/ DC
disconnect
DC conduit (1 for each combiner)
2 current carrying conductors
1 earth ground
(600VDC rated wire)
+
+
-
Negative Array (positive ground)
Figure 1. Single Line Drawing for basic single inverter
Maximum String Voltage
IDEAL POWER recommends designing positive and negative
grounded arrays for +/-600Voc max. The inverter includes additional protection so the inverter will not see voltages above +/500V even if the array provides over +/-500Voc. The inverter will
not be damaged if the array voltage reach over +/-500V and this
will not void the warranty, which is a major concern for system designers. Maximum inverter protection is guaranteed to +/-700Vdc.
On an unusually cold clear winter morning the inverter may not
start immediately with array voltages over +/-500Vdc, but protects
the system from damage. This allows the system to be designed
for higher average operating voltages and improved DC wiring
efficiency without the fear of inverter damage on very cold days.
The Ideal Power inverter includes DC relays on neutrals from
both positive and negative grounded arrays. When the inverter
is off, these DC neutral contactors are open, ensuring that the
full array voltage is not seen by the inverter’s power electronPreliminary — Subject to Change without Notice
The inverter is wired using two
sub-arrays: a positive sub-array
with negative grounding and a
negative sub-array with positive grounding. Both sub-arrays
should use the same type of
PV modules, and be mounted
in a co-planar and unshaded
location, ensuring that all PV
modules have similar power
generation characteristics. The
positive and negative subarrays are connected in series
through the inverter, so they
are required to have the same
current and number of strings.
Unlike other bipolar inverters,
the voltages from the negative
and positive sub-arrays do not
installation
need to be balanced.There is no
efficiency reduction for slightly
unbalanced voltages, which provides the system designer more freedom to maximize the number
of modules in a limited space. For example, in a space-constrained
location, the negative sub-array may have 12 PV modules/string
and the positive sub-array may have only 11 PV modules/string.
Inverter Field Wiring
A photo of the Ideal Power inverter compartment is shown in
Figure 2. DC and AC power conduits should be routed to the
bottom of the aluminium enclosure: side entry of conduits is not
recommended.
The positive and negative sub-arrays are tied together through
DC contactors and connected to ground through a 1A GFDI
fuse. The current through the GFDI fuse is monitored with mA
accuracy, using a 500mA programmable trip point. The DC contactors also provide the ability to sense for ground faults on the
grounded conductors. This capability is unique to Ideal Power
wiring schema: eliminating the ground fault detection blind-spot,
www.IdealPower.com
5
Figure 2. Inverter Wiring
Compartment
6
12
12
13
1
2
3
4
7
8
9
10
11
1. AC L1 (50A fuse)
2. AC L2 (50A fuse)
3. AC L3 (50A fuse)
4. AC ground
5. RS-485 (for monitoring)
6. RS-485 (for monitoring)
7. DC ground
8. Neg Array DC- (70A fuse)
9. Neg Array DC+
10. Pos Array DC11. Pos Array DC+ (70A fuse)
12. DC Contactor (2x)
13. GFDI fuse (1A fuse)
which was the well documented root cause of PV rooftop fires
in Bakersfield, California and North Carolina.
fer improved fireman safety, when compared to conventional
transformer-less PV Inverters.
The center wiring compartment supports system monitoring via
the RS-485/MODBUS interface. The inverter includes two RJ45
connectors for daisy chaining of multiple inverters to a thirdparty monitoring system.
The larger installation uses multiple disconnecting combiners,
each located at the array, and each featuring a 24Vdc disconnect
control voltage. When the 24Vdc control voltage is removed, as
a result of grid failure, building AC shutdown, or disabled by a
fire safety system, the high voltage in all DC homerun conduits
are immediately de-energized. The disconnecting combiner ensures that DC homerun conduits pose no safety threat to fire
personnel. Only the short string wiring underneath the modules to the combiner at the edge of the array will support live
DC voltages, and these are easily identified. The use of remotely controlled disconnecting combiners may also eliminate the
need for dedicated DC disconnects at each inverter.
Multi-Inverter Installations
A multiple inverter installation is shown in Figure 3, utilizing
sub-array and string design considerations identical to a single inverter installation. Utilizing disconnecting DC combiners
as described below, combined with the grounded-conductor
blind-spot, as described above, Ideal Power’s PV Inverters ofDC conduit—600Vdc rated wire
2 current carrying conductors
1 earth ground
Positive
Combiner
w/auto DC
disconnect
Negative
Combiner
w/auto DC
disconnect
AC conduit
480Vac 3 phase (delta)
3 wire & ground
AC
Subpanel
with
breakers
Revenue
Grade
AC Meter
Building
Panel
with AC
disconnect
Positive
Combiner
w/auto DC
disconnect
480Vac
to
24Vdc
Supply
Negative
Combiner
w/auto DC
disconnect
Positive
Combiner
w/auto DC
disconnect
Negative
Combiner
w/auto DC
disconnect
24Vdc
Inverter
and AC
Revenue
Monitoring
RS-485/MODBUS physical I/F
SunSpec Alliance commands
Figure 3. Multiple Inverter Installation with auto disconnects & monitoring
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The multiple inverter installation
typically uses a 480Vac 3-Phase
AC subpanel located near the
inverters, generally eliminating
the need for dedicated AC disconnects at each inverter. For
safety purposes, it is also recommended that this dedicated
AC subpanel also power the
24V combiner control voltage
described above: once the subpanel is powered down, DC
power is also disconnected automatically at each combiner.
The larger installation also
shows a third party monitoring solution for a revenue grade
AC power monitoring and individual inverter monitoring, via
the IPV's SunSpec compliant
MODBUS interface. .
July 2014
30kW PV Inverter
IPV-30kW-480
SPECIFICATIONS
PV Array
Bipolar
PV Array DC Input
Absolute Maximum Voltage
± 600 (1200Vdc)
Operating Voltage
± 100 to ± 500
Full Power Range
± 250 to ± 500
GFDI on all conductors
included
Maximum GFDI Current
1 Amp fuse, programmable trip from 200 to 500 mA
Maximum DC Current
60 Amps
AC Grid Output
Maximum Output Power
30 kW continuous
AC Voltage; Tolerance
480V AC 3-phase line-to-line; +5% to -10%
Maximum AC Current
39 A per phase
AC Grid Frequency; Tolerance
Power Factor
60 Hz; 59.3 to 60.5 Hz
>0.97 at rated output power
Efficiency
96.5% CEC-weighted
Tare Losses
10W
Total Harmonic Distortion
<4%
Transient Protection
IEEE C62.41 Class B
Protection
Transformer-less with circuit isolation
AC over / under voltage
AC / DC over current
AC over / under frequency
DC ground fault (GFDI) on all conductors
Environmental
Ambient Operating Temperature
Ambient Storage Temperature
-25 to 50°C full power, >50°C reduced power
-40 to 85°C (non-operating)
Humidity
0–100% relative humidity
Cooling
Forced convection using redundant variable speed fans
Enclosure Rating
Certifications
NEMA 3R
UL1741 / IEEE 1547—ETL Listed
Elevation Limit without Derating
Acoustic Sound Pressure Level
6560 ft/2000 m
<59 dBA at 2.5m (typical full power 25°C ambient)
General
Enclosure Size (H x W x D)
Communications
System Requirements
97 lbs / 43 kg
36.5 x 15 x 10.75 inches / 97.2 x 38.1 x 27.3 cm
RS-485 / MODBUS, SunSpec certified
External DC and AC disconnects required
Warranty
Single
Stage —
AC–AC
Converter
forwithout
Wind Turbines
Preliminary
Subject
to Change
Notice
10 year standard warranty
www.IdealPower.com
920-0DATA-0001
Weight
May July
20112014

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