HT Series 1-20k Rack Power-Frequency Inverter
A transformer-isolated rack inverter built for utility DC panels — double conversion, zero transfer and static bypass for RTU, carrier and SCADA loads.
Product image
- Brand
- HighIdea
- Type
- Power-frequency online double-conversion inverter (rack-mount)
- Typical applications
- Power plants, substations, distribution rooms, power-line carrier, RTU and SCADA systems
- Models in range
- 1 - 3 kVA, 5 - 10 kVA, 10 - 20 kVA
- Category
- Power & Telecom Inverters
The HT Series is a rack-mount power-frequency inverter developed for power generation, transmission and distribution. It uses double conversion with zero transfer, an input isolation transformer and a static bypass, and is intended for power telecontrol, RTU, power-line carrier and power monitoring equipment.
Design notes
Under normal conditions single-phase 220Vac (or three-phase 380Vac) mains is isolated, rectified and filtered, then rebuilt by an SPWM/IGBT inverter into a standard sine wave. The input transformer holds the rectifier DC output within 5 % even when mains varies by 25 % and the load changes across its full range. If mains fails, the station DC panel supplies the DC bus through a blocking diode without interruption; if the DC bus falls to its end-of-discharge voltage, the system alarms and the static switch transfers the load to bypass. An inverter overload or fault also triggers bypass with an alarm, and output returns automatically to inverter supply when mains recovers.
Configuration
Confirm the AC input phase and voltage, the station DC bus voltage, the load kVA/kW and the required bypass and alarm interfaces. For high-capacity wide-DC-input systems see the H 6-20k; for transformer-isolated AC-input UPS see Industrial UPS.
Key Features
- Double-conversion online topology with zero transfer time
- Input isolation transformer keeps rectifier DC stable within 5 % over a 25 % mains swing
- SPWM / IGBT inverter stage for low distortion and good dynamic response
- Station DC panel supplies the DC bus uninterrupted when mains fails
- Static switch transfers to bypass on inverter overload, fault or DC under-voltage
- Purpose-designed for power telecontrol, RTU, power-line carrier and power monitoring
- Alarm signalling on DC discharge, low DC voltage and bypass operation
Applications
Power plants & substations
Isolated AC for control, protection and auxiliary systems.
RTU, carrier & SCADA
Clean power for telecontrol and power-line carrier equipment.
Distribution rooms
Automatic changeover between mains, DC panel and bypass.
FAQ
How does the DC panel take over?
How stable is the output under a fluctuating grid?
Is this the same as a commercial rack UPS?
Related Models
H Series 6-20k
High-capacity online conversion from a wide 160-300VDC bus, with external isolation transformers and the surge withstand utility DC panels demand.
View detailsOnline DC-AC Inverters
Continuous inverter-fed output from a station or telecom DC bus — 0 ms transfer, full isolation and no noise fed back into the DC system.
View detailsIndustrial UPS
Transformer-isolated power-frequency UPS from 6 to 600kVA — built for hostile grids, inductive loads and sites where galvanic isolation is non-negotiable.
View detailsSpecification reference
| Rated capacity | 1 - 20 kVA |
|---|---|
| AC input | 220 Vac single-phase or 380 Vac three-phase, +/- 25 % |
| DC source | Station DC panel / battery bank |
| Output voltage | 220 Vac pure sine wave |
| Topology | Power-frequency online double conversion |
| Transfer time | 0 ms (double conversion) |
| Isolation | Input isolation transformer |
| Inverter stage | SPWM with IGBT modules |
| Bypass | Static switch on overload, fault or DC under-voltage |
| Mounting | 19-inch rack |
Specifications subject to the latest factory data. Final configuration is sized against the actual load, backup runtime and site power conditions — this table is for pre-selection only.