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.
- 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.
|Size||Credit or Debit||Purchase Order|
All prices subject to change without notice. Quantity discounts available, contact UST for details.
|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|
|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|
|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|
|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)|