Industrial-grade automatic voltage regulation featuring a non-full-power semiconductor design.
The MiniEVR continuously monitors output voltage and quickly switches transformer taps when voltage falls outside regulation range. The MiniEVR™ automatic voltage regulator continuously conditions power with no operator or programming required. In the event of a malfunction, the automatic bypass actuates to isolate power electronics and controls while maintaining power to the load.
Industrial-grade means our MiniEVR is compatible with all load types and load-power factors and provides a minimum 1,000% fault-clearing capability. Unlike computer-grade products, the MiniEVR is designed for frequent high-inrush current and low-power factor loads without the need to oversize the product or sacrifice reliability.
MiniEVR Features
- Highest overload capacity available for compatibility with all load types
- Highest fault-clearing capacity available for reliable operation of protective devices
- 99% efficiency for all but the lowest end of the load range
- Continuous load current – no load current interruption on tap switching
- Quickly corrects under/over voltage, sags, and swells
- Automatic failsafe electronic bypass eliminates load current interruption in the event of a malfunction
- Zero moving parts and fan-free design for increased reliability and no scheduled maintenance
- Surge suppression and input circuit breaker are standard
- Natural convection cooling
MiniEVR installation is simple. The unit arrives completely assembled and requires no programming, testing, measuring, setting of switches, or internal wiring. It installs much like a dry-type transformer: simply place the unit and make the input and output wiring connections.
| Application | |
|---|---|
| Size (kVA) - Single Phase | 5, 7.5, 10 (for larger sizes see UST SureVolt™) |
| Input / Output Voltages | 1Ø/60Hz: 120, 208, 240, 480 1Ø/50Hz: 110, 220, 380, 400 Non-standard voltages available upon request. |
| Regulation / Operating Characteristics | |
|---|---|
| Regulation | Nominal input voltage +10%/-22%, Nominal output voltage ±3 (other options available) |
| Regulation Variation | None – regulation constant for 0 to 100% load and any load power factor |
| Overload/Inrush Capability | 1000% - 1 second, 500% - 5 seconds, 200% - 1 min. ; 1000% fault clearing |
| Minimum Load | No limitations, compatible with all load types |
| Load / Power Factor | No minimum or part load or power factor limitations, compatible with all load types |
| Tap Switching | No load current interruption or waveform distortion on switching at any load or power factor |
| Zero Crossing Sensitivity | None, tap switching not dependent on determining load current zero crossing |
| Harmonic Distortion | No distortion added at any load or load power factor |
| Response Time | 1 cycle typical, regardless of load or load power factor |
| Efficiency | 99% typical |
| Operating Frequency | ± 3% of nominal frequency |
| Protection / Bypass | |
|---|---|
| Surge Suppression | Included, complies with ANSI/IEEE C62.41, UL 1449 |
| Failsafe Electronic Bypass | Auto-actuation on high temperature, over-current, or component failure with no loss of load |
| Construction | |
|---|---|
| Technology | Electronically controlled tap-switching series transformer design |
| Switching Semiconductors | Non-full power semiconductors. Individual SCRs are not required to carry full unit current |
| Controls | No controls or programming required, no user-adjustable controls |
| Cooling | Natural convection, no cooling fans used |
| Transformer | Dry-type auto-transformer, copper wound |
| Enclosure | NEMA-1, ANSI 61 grey, other enclosure types & colors available (consult factory for specific requirements) |
| Monitoring | Contacts for remote indication of unit and surge suppression status are included |
| Audible Sound Level | Less than 65 dB @ 1 meter |
| Environmental Requirements | |
|---|---|
| Temperature - Humidity | Ambient 32° to 104°F (0 to 40°C) – Relative humidity 0-95% non-condensing |
| Operating Altitude | 0 to 3,300 ft (1000m) |