MEAN WELL NTU-3200-212AU is a true sine wave DC-AC inverter with built-in UPS AC bypass, 3200 W continuous output, a 12 VDC nominal battery input and 230 VAC / 50 Hz factory output. This model has an Australian receptacle; apply the specified socket-current, input-voltage and temperature limits.
Product Datasheet
Download MEAN WELL NTU-3200 Datasheet (PDF)
The NTU-3200 section is on PDF pages 29, 30, 31, 32, 33, 34, 35, 36, 37, 38. Refer to the complete mechanical drawings and notes when planning installation.
Model and Output
Complete model
NTU-3200-212AU
Series
NTU-3200
Continuous output power
3200 W
Nominal DC input voltage
12 VDC
Default AC output voltage
230 VAC
Overrated output power, 3 minutes
3680 W
Peak output power, 10 seconds
4800 W
Surge output power, 30 cycles
6400 W
Selectable AC output voltage
200 / 220 / 230 / 240 VAC
Factory output frequency
50 ±0.1 Hz
Selectable output frequency
50 / 60 Hz
Output waveform
True sine wave; THD <3%
AC regulation
±3.0% at rated output voltage
Continuous, three-minute, ten-second and 30-cycle ratings are separate limits. Size the load for the selected output voltage and connection, and apply both input and thermal derating.
Battery Input and Consumption
Typical DC input range
10–16.5 VDC
Typical DC input current
320 A
Typical efficiency
90%
Battery types
Lead-acid or lithium-ion
Typical no-load power, saving mode
<15 W
Typical no-load power, non-saving mode
55 W
Off-mode current draw
≤2 mA
Internal pre-start setup time
8 s
Power saving is disabled by default. When enabled, automatic detection changes to saving mode at an AC output load of 10 W or less. The front-panel DIP switch selects saving or non-saving operation.
Efficiency, AC regulation and THD are specified using a 2400 W linear load at 12.5 VDC input. Unless otherwise stated, measurements use rated load, 25°C ambient and factory settings.
UPS AC Bypass
AC input voltage selections
200 / 220 / 230 / 240 VAC
AC input acceptance / recovery
±16% / ±13% of the selected AC output voltage
AC input frequency range
45–65 Hz
Typical transfer time
10 ms between inverter and AC bypass
Factory supply priority
Mains priority
With mains priority selected, an available AC input within the permitted voltage band directly supplies the loads through the bypass. If AC input is absent or outside the ±16% band, the inverter supplies the load from the battery. Battery priority can be selected by the dedicated DIP-switch sequence.
The bypass relays remain normally closed when the inverter is switched off. AC input can therefore still pass through to the loads; switching off the inverter is not isolation from the AC supply.
In inverter mode, AC output N, receptacle Earth and FG are internally connected. In bypass mode, receptacle Earth remains connected to FG, while output L and N depend on the AC mains connection. Receptacle Earth and FG are always electrically joined.
Protection
Low DC alarm
11 ±0.3 VDC
Low DC shutdown
10 ±0.3 VDC
Low DC restart
12.5 ±0.3 VDC
High DC alarm
15.5 ±0.3 VDC
High DC shutdown
16.5 ±0.3 VDC
High DC restart
15 ±0.3 VDC
Internal fuse arrangement
12 × 40 A
Circuit breaker
16 A
Reverse battery polarity opens the internal fuse. Typical overload limits are 105–115% load for 180 seconds and 115–150% load for 10 seconds. Overload, output short circuit and overtemperature shut down the output; re-power on to recover. The low-voltage disconnect protects against battery over-discharge.
Operating Conditions and Derating
Operating ambient temperature
−25 to +70°C, subject to derating
Working humidity
20–90% RH, non-condensing
Storage conditions
−30 to +70°C; 10–95% RH, non-condensing
Cooling
Temperature-controlled fans
Vibration
10–500 Hz, 3G; 10 minutes/cycle; 60 minutes each on X, Y and Z axes
For horizontal mounting, the temperature curve permits 100% load from −25°C through 40°C, then 80% at 50°C, 50% at 60°C and 25% at 70°C. The upper operating temperature does not mean full-power operation.
The DC input curve permits 80% load at 10 VDC, rising to 100% at 11 VDC and remaining at 100% up to 16.5 VDC. Apply the input and ambient-temperature limits together.
Output Wiring and Installation
Output connection
Australian receptacle
Ordering condition
UK and AU output configurations are supplied by request
Receptacle withstand current
10 A
AC terminal sequence
AC INPUT L, N; FG; AC OUTPUT L, N; FG
Dimensions, L × W × H
420 × 270 × 98 mm
Case and drawing tolerance
Case 289A; dimensions in mm, general tolerance ±1 mm
Reference mass per unit
8.6 kg / 8600 g; catalogue PACKING reference
The output terminal connection is inside the AC output panel. Whenever load current exceeds the fitted receptacle rating, use that terminal connection instead of drawing the current through the receptacle. Socket limits are US 15 A, EU 16 A, CN 10 A, UN 16 A, UK 13 A and AU 10 A; these limits also apply when selecting a lower AC output voltage.
The mechanical drawing shows chassis bonding, DC input polarity and outward airflow at the DC input-side fans. Keep the airflow path unobstructed and use the complete drawing for mounting-slot locations; its longitudinal callouts include 286, 266 and 246 mm, with 270 mm overall width and a 259 mm body-width callout.
The PACKING field lists 8.6 kg per unit and 1 unit / 10.4 kg / 1.39 CUFT for the package. The per-unit value is a catalogue reference, not a measured shipping weight.
Remote Control and Communications
Built-in remote ON/OFF
Pins 1 and 2 open: normal operation; short: remote off
Remote connector and mating parts
JST B-XH connector; JST XHP mating housing; JST SXH-001T terminal, or equivalents
Serial interface
RS-232 via the RJ11 remote port
RS-232 receive connection
RJ11 pin 2 (Rx) to DB9 pin 3
RS-232 signal ground
RJ11 pin 3 (GND) to DB9 pin 5
RS-232 transmit connection
RJ11 pin 4 (Tx) to DB9 pin 2
The serial interface reads internal data from one NTU-3200. It is separate from the two-contact dry-contact remote ON/OFF input. Select the full JST housing reference to match the two-contact connector and wire assembly shown in the drawing.
Optional IRC1, IRC2 and IRC3 controllers monitor and control the inverter by decoding its RS-232 data. Available controller signals depend on the inverter model; display features do not establish additional functions in this inverter.
DIP-Switch Settings
SW1/SW2 OFF/OFF selects 200 VAC; OFF/ON selects 220 VAC; ON/OFF selects 230 VAC; ON/ON selects 240 VAC. SW3 ON selects 50 Hz and OFF selects 60 Hz. SW4 ON selects saving mode and OFF selects non-saving mode.
To select battery priority: with power not applied, set DIP switches 2 and 3 OFF and arrange battery operation with remote OFF asserted. Within 15 seconds after applying power, set switches 2 and 3 both ON, then both OFF. All LEDs except AC Input flash green three times to confirm. Switch the NTU off, release remote OFF, then switch it on to load battery priority.
To return to mains priority: begin with switches 2 and 3 ON and remote OFF asserted. Within 15 seconds after applying power, switch both OFF and then both ON. The same three green flashes confirm the setting. Switch the NTU off, release remote OFF, and switch it on again. This clears battery priority; it does not restore all factory settings. Follow the function-manual sequence before setting the required output voltage and frequency.
Status Indicators
Status LED: flashing green means system check; steady green means inverter OK; steady orange means remote OFF; flashing orange means saving mode; red indicates an abnormal state.
DC Input LED for the 12 V model: green from 12.5–15.5 VDC; orange from 11–12.5 VDC; red below 11 VDC or above 15.5 VDC.
Load indication is green below 40%, orange at 40–80%, and red above 80%. The load LEDs are steady in mains-priority status and flashing in battery-priority status. AC Input LED is steady green for mains OK, flashing green for mains error, and off when mains is disconnected.
With Status steady red: DC Input off and Load flashing red identifies overload or output short circuit; DC Input flashing red and Load off identifies abnormal DC voltage; both DC Input and Load flashing red identifies overtemperature or fan lock. Status flashing red with both DC Input and Load off identifies inverter failure.
Safety, EMC and Reliability
Certification scope for this socket
CB, E13, DEKRA, EAC, CE and UKCA, plus RCM for the Australian configuration.
Emission scope
BS EN/EN55032 (CISPR32) Class A, radiated and conducted, for the 212/224/248 output group.
DC input to AC input withstand
3.0 kVAC
DC input to AC output withstand
3.0 kVAC
AC output to FG withstand
1.5 kVAC
MTBF, Telcordia TR/SR-332
319.3 thousand hours minimum
MTBF, MIL-HDBK-217F
30.3 thousand hours minimum at 25°C
CB IEC62368-1 and DEKRA BS EN/EN62368-1 apply where CB/DEKRA are listed for the selected socket. UL458 is limited to 112/124/148 TB configurations. AS/NZS 62368.1 relates to the Australian configuration; EAC refers to TP TC 004. Use the model-specific marks above, not the complete family logo set.
Harmonic current: BS EN/EN61000-3-2 Class A; voltage flicker: BS EN/EN61000-3-3. Immunity references are BS EN/EN55024 and BS EN/EN55035: ESD EN61000-4-2 at 8 kV air, Level 3, and 4 kV contact, Level 2; radiated EN61000-4-3 Level 2; EFT/burst EN61000-4-4 Level 2 at 1 kV; surge EN61000-4-5 Level 3 at 1 kV line-to-line and 2 kV line-to-earth; conducted EN61000-4-6 Level 2; magnetic field EN61000-4-8 Level 1.
EN61000-4-11 tests list >95% dip for 0.5 periods, 30% dip for 25 periods and >95% interruptions for 250 periods. The final equipment must be checked for compliance after integrating this inverter.
Included Parts and Optional Accessories
Standard terminal protectors
One red cover, one black cover and four M3 screws
Terminal-protector drawing dimensions
52 × 40.8 × 39.8 mm
Optional communication cable
RJ11-RS232; one cable, ordered separately
Optional remote controllers
IRC1, IRC2 or IRC3; ordered separately
Optional handle kit
Carry Handle; one handle, four foot pads and two screws; ordered separately
The handle drawing shows 180 × 27 × 10 mm; its installation illustration uses two M4 screws. Terminal protectors are the standard supplied accessory; the communication cable, remote controller and Carry Handle are separate purchases.
The inverter has MCU digital control and conformal coating. The manufacturer datasheet lists a three-year warranty; terms depend on the applicable supply arrangement.
Applications include home and office appliances, power tools, portable equipment, vehicles, yachts and off-grid battery systems. The application diagrams show separate battery banks and external PB/NPB/NPP chargers; these system components are not integrated charging functions of the NTU inverter. Refer to the manufacturer installation manual for final wiring and setup.
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