Schaefer IT Series Inverter, 0.2 to 15 kVA Industrial DC/AC
The Schaefer IT Series Inverter converts DC battery or bus voltage into a stable 1-phase AC supply for industrial and critical infrastructure equipment. Ratings run from 0.2 kVA to 15 kVA, with 115Vac or 230Vac output and DC input bands from 20Vdc up to 800Vdc, so a single series covers everything from a 24V control system to a high-voltage DC b...
Read MoreThe Schaefer IT Series Inverter converts DC battery or bus voltage into a stable 1-phase AC supply for industrial and critical infrastructure equipment. Ratings run from 0.2 kVA to 15 kVA, with 115Vac or 230Vac output and DC input bands from 20Vdc up to 800Vdc, so a single series covers everything from a 24V control system to a high-voltage DC bus.
Every model has an integrated transformer for isolation and voltage transformation. Standard output frequencies are 50Hz, 60Hz, 400Hz and 800Hz, and output can be programmed anywhere from 40Hz to 400Hz. The same IT platform is also available as an AC/AC frequency converter with 1-phase or 3-phase input.
DC input options are 20 to 32Vdc, 40 to 64Vdc, 50 to 80Vdc, 80 to 160Vdc and 160 to 320Vdc, plus high-voltage versions at 340 to 400Vdc (Z), 340 to 640Vdc (G) and 450 to 800Vdc (K). Matching the input band to your nominal battery or bus voltage is the first step in model selection.
Units are built as wall-mount enclosures or as Euro-Cassette modules for a 6U subrack, with optional standalone output transformers. Cooling is either natural convection or fan-assisted.
For uninterrupted supply, the Schaefer IT Series Inverter can be combined with a Schaefer Static Switch (SS) or UPS Module to form an industrial UPS system. Compare models in the selection table below, browse our wider range of industrial DC/AC inverters, or talk to Powerbox Australia for engineering support with sizing and system integration.
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Features
- Power ratings from 0.2 kVA to 15 kVA for DC/AC inverters and AC/AC frequency converters.
- 1-phase outputs of 115Vac or 230Vac, with frequencies of 50Hz, 60Hz, 400Hz, 800Hz, and programmable 40-400Hz options.
- DC input voltages range from 20Vdc to 800Vdc; AC input supports 1-phase and 3-phase configurations.
- Flexible mounting options: wall-mount or Euro-Cassette for 6U subrack integration, with standalone output transformers.
- Cooling options: natural convection or fan-assisted designs for varied environments.
- Can be used in conjunction with Schaefer Static Switch (SS) or UPS Module for use within Industrial UPS system.
Specifications
| INPUT | |
|---|---|
| Input voltage |
20-800Vdc or |
| No-load input power | 10 - 30W model (series dependent) |
| Inrush current | for AC input and DC input >160V: limited by thermistor |
| Hold-up time | AC input: 10 ms typical |
| Input Options |
i: Inrush current limiting |
| OUTPUT | |
|---|---|
| Output voltage | 1ph: 115Vac, 230Vac 3ph: 3x200Vac3x400Vac, 3x480Vac See selection table |
| Output power | 200VA up to 45KVA See selection table |
| Line regulation | 2% (±10%) |
| Load regulation | 1% typical, 3% max, load step 10-90% |
| Turn on rise time | soft-start, 100ms typical |
| Waveform | sine wave or any wave shape programmable by external signal |
| Frequency | 40 – 800 Hz: adjustable or programmable or any fixed frequency (crystal stabilized) |
| Distortion | 3 % typical 5 % @ 400 Hz 7 % @ 40 – 400 Hz, 800Hz |
| Surge power | 2 x nominal power for 1 s |
| Crest factor | approx. 3 |
| Power factor | cos 0.7 inductive / capacitive |
| Efficiency | 80 – 92 % |
| Output Options | red: Inverter parallel operation: for IT5xxx h1: Inhibit by external closing contact, signal referred to input h2: Inhibit by voltage signal, signal referred to output h3: Inhibit by closing contact, signal referred to output See selection table for further details |
| Signal Options | pr: Input voltage supervision (power ok) incl. relay contacts ac: AC ok for inverter including relay contacts See selection table for further details |
| PROTECTION | |
|---|---|
| Overload protection | current limited to approx. 1.05 x nominal current (steady state) |
| Short circuit protection | electronically limited to 3 x nominal current, unit switches off after 1s |
| MTBF | 120Khrs at 40°C acc. to MIL-HDBK-217E (notice 1) |
| ENVIRONMENTAL | |
|---|---|
| Operating temperature | -20°C to +75°C (optional -40 to 75C) |
| Load derating | Derate 2.5% per °C, from +55°C to 75°C |
| Storage temperature | -40°C to +85°C |
| Cooling | H: Heatsink - natural convection TF: Temperature controlled Fan included See selection table |
| Humidity | Up to 95% RH, non-condensing |
| Environment Options | t: Tropical protection c: Extended temperature range ms: Increased mechanical strength See selection table for further details |
| STANDARDS | |
|---|---|
| Immunity | acc. to EN 61000-6-2 |
| Safety / Construction | acc. to EN60950-1 / EN50178 |
| Protection category | IP20 acc. to EN60529 NEMA or others on request |
| EMI standards | acc. to EN61000-6-4 class A, optionally class B |
| MECHANICAL | |
|---|---|
| Mounting | Rack Mount and Wall Mounting See technical illustrations |
| Dimensions and weight | See Technical illustration |
Selection Table
| INPUT 20 - 32 VDC | OUTPUT KVA | SIZE | INPUT 40 - 64 VDC | INPUT 50 - 80 VDC | OUTPUT KVA | SIZE | INPUT 80 - 160 VDC | OUTPUT KVA | SIZE | COOLING | OUTPUT VAC |
|---|---|---|---|---|---|---|---|---|---|---|---|
| IT1626 | 0.2 | A | IT1636 | IT1646 | 0.4 | A | IT1656 | 0.5 | A | H | 115 |
| IT3636 | IT3646 | 0.5 | B | IT3656 | 1 | B | H | 115 | |||
| IT3856 | 1.2 | C | H | 115 | |||||||
| IT4836 | IT4846 | 1.2 | D | IT4856 | 2 | D | H | 115 | |||
| IT5636 | IT5646 | 2 | E | IT5656 | 3 | E | TF | 115 | |||
| IT5736 | IT5746 | 3 | E | IT5756 | 5 | F+T1 | TF | 115 | |||
| IT1628 | 0.2 | A | IT1638 | IT1648 | 0.4 | A | IT1658 | 0.5 | A | H | 230 |
| IT3638 | IT3648 | 0.5 | B | IT3658 | 1 | B | H | 230 | |||
| IT3858 | 1.2 | C | H | 230 | |||||||
| IT4838 | IT4848 | 1.2 | D | IT4858 | 2 | D | H | 230 | |||
| IT5638 | IT5648 | 2 | E | IT5658 | 3 | E | TF | 230 | |||
| IT5738 | IT5748 | 3 | E | IT5758 | 5 | F+T1 | TF | 230 | |||
| Cooling | |||||||||||
| H: Heatsink - natural convection | |||||||||||
| TF: Temperature controlled Fan included | |||||||||||
| Input Voltages | |||||||||||
| For Input Voltages 160 - 800VDC, Contact Powerbox | |||||||||||
| Size | |||||||||||
| For Sizes A to L, see Technical Illustrations | |||||||||||
| Model designation options: | Add the designation of options to the model number, eg. C3660-dd-dr-cs Options for Input, Output, Environmental and Mechanical follow. | ||||||||||
| 19" Rack Mounting Options | Subrack Height 3U, 5U, 6U Wiring, Front Panels Accessories: Fuses, MCBs, Mains on/off switch Contact Powerbox for rack configuration |
| INPUT OPTIONS | |
|---|---|
| Option “i” | (inrush current limiting): A thermistor is connected in series with the input lines which changes its resistance from high to low when it gets hot. It does not reduce the current surge if the input power is interrupted for a short period of time not allowing the thermistor to cool down. Thermistors are fitted as standard to all mains input models except for 1-phase input of models > 2.5kW. Thermistors are available up to 45A. For higher input current an electronic inrush current limitation can be offered. |
| Option “ie” | electronic inrush current limiting An electronic circuit limits the inrush current. |
| Option “sd” | (series diode): A series diode protects the module against input voltage of wrong polarity (additional power losses). |
| Option “ad” | (anti-parallel diode): To avoid the power losses of a series diode a diode is provided with opposite polarity in parallel to the input blowing an internal or external fuse if the module is connected to a supply with wrong polarity. |
| Option “au” | (auto-ranging) For standard dual AC input models the range of 115/230Vac is to be selected by connecting the input line to different pins on the connector. With auto-ranging the unit senses the input voltage and provides automatically the correct connection. |
| Option “p” | (power fail): A signal (logic or relay) is given if the input voltage (AC or DC) drops below the specified limit. In AC input units we sense the rectified input voltage so that a power fail alarm will not be triggered if at light loads mains power returns before the input capacitors are substantially discharged. |
| Option “r” | (relay): A relay instead of a logic signal is provided for failure indication. |
| output options | |
|---|---|
| Option “dd” | (decoupling diode): For redundant operation the outputs of two or more units are paralleled behind de-coupling diodes so that an internal fault of one module does not affect the operation of the others. These diodes cause power losses. |
| Option “cs” | (active current sharing): An additional control circuit provides active current sharing via an interconnecting wire between converters that operate in parallel. Active current sharing should be used for multi-output units operating inparallel. |
| Option “csi” | (current sharing interrupt): Option "csi" will effect the removal of the "cs" signal. Should there be an instance where a unit is not supplying the load, then the effect of its "cs" signal is removed, and the load voltage is unaffected by this condition. |
| Option “h1” | (inhibit): A terminal connected to the negative input line also shuts off the converter. This can also be used in conjunction with a thermal trip which shuts the unit down. |
| Option “h2” | (inhibit): Operation of the unit is inhibited if a voltage signal (5V/10mA) is applied in reference to the negative line of the (main) output. |
| Option “rco” | (reducing current limiting at over temperature) A circuit reduces the current limiting level at higher temperature (to be specified). |
| Option “d” | (DC-ok, one output): A logic signal is given if the output voltage (main output in multi-output systems) is below the specified limit. |
| Option “m” | (DC-ok, all outputs): In multi-output systems a logic signal is provided if the voltage of any output is below the specified limit. |
| Option “ac” | (AC ok) A logic signal connected to relay contacts is given if the output voltage of an inverter is below the specified limit. |
| Option "y" | (sys-reset): This logic signal is a combination of power fail and DC-ok as specified for VME systems. |
| Option "r" | (relay): A relay instead of a logic signal is provided for failure indication. |
| environment options | |
|---|---|
| Option "t" | (tropical protection):The unit is given additional protection by a heavy coat of varnish on the printed circuit board(s) and components. |
| Option "c" | (extended temperature range):The circuit is designed and tested for operation at an ambient temperature as low as –40 °C. |
| Option "ms" | (increased mechanical strength): Screws are secured by Locktite and heavy components are fastened by ties and/or glue. Modules with the "ms" option meet the standard EN61373 regarding shock and vibration. |
| mechanical options | |
|---|---|
| Standard mounting | "Eurocassette" pluggable module for 19" sub-racks |
| Option "w" | (wall mounting): Module is screwed against a mounting plate for installation in a cabinet. The load connections are typically a terminal block. |
Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.