Product Description
Description: Phase Monitor Relays • Operating Voltage: 190-480 VAC • Frequency: 50/60Hz • Type of Measurement : RMS • Auto Ranges : Yes • Under Voltage Trip : Trip 185-480VAC
Reset Trip setting +3% • Over Voltage Trip : Trip 208-528VAC
Reset Trip setting 3% • Voltage Unbalance (conforms to NEMA): Trip 6%, Fixed
Reset 5% Fixed • Trip Delay Time: Over, Under, & Unbalanced 1-30 sec., adjustable
Single-Phasing Faults 1 sec., fixed
Unbalance > 15% 1 sec., fixed • Output Contacts : SPDT 10A at 240VAC resistive • Mounting : DIN Rail or Surface Mount
| Product Information | Resources |
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| Specifications |
| Product Attribute | Attribute Value |
| Operating Voltage | 190-480 VAC |
| Frequency | 50/60Hz |
| Type of Measurement | RMS |
| Auto Ranges | Yes |
| Under Voltage Trip | Trip 185-480VAC Reset Trip setting +3% |
| Over Voltage Trip | Trip 208-528VAC Reset Trip setting 3% |
| Voltage Unbalance (conforms to NEMA) | Trip 6%, Fixed Reset 5% Fixed |
| Trip Delay Time | Over, Under, & Unbalanced 1-30 sec., adjustable Single-Phasing Faults 1 sec., fixed Unbalance > 15% 1 sec., fixed |
| Restart Delay | 1-500 sec., adjustable |
| Reset | Automatic |
| Output Contacts | SPDT 10A at 240VAC resistive |
| Power Consumption | 3W |
| Operating Temp | - 20o to +140o F |
| Humidity Tolerance | 0-97% w/o condensation |
| Terminal Torque | 3.5 in. lbs. maximum |
| Wire Type | Stranded or solid 14-26 AWG, 1/terminal |
| Enclosure | NORYL plastic |
| Mounting | DIN Rail or Surface Mount |
| Weight | 11 oz. |
| Low Current Options | Models ordered with suffix /SG have silver with gold flash contacts |
| Agency Approval | UL Recognized (U.S. and Canada) (For use in a Pollution Degree 2 Environment) |
| Series Features |
| MODEL 20VB 3-Phase Monitor with Adjustable Trip & Restart Delays |
| Series Description: A microcontroller-based universal 3-phase voltage band monitor for protecting 3-phase motors of any size from abnormal power conditions. The Model 20VB can detect under voltage, over voltage, voltage unbalance, reverse phase, and single-phasing even when regenerated voltage is present. Status of the 3-phase system is indicated by LEDs. The Model 20VB is UL Recognized in the U.S. and Canada. Relay operation is fail-safe, i.e. the SPDT output contacts drop out when a fault condition or loss of power occurs. Under and over voltage trip points are both adjustable. The under voltage adjustment has two scales, 185-240VAC and 370-480VAC. The over voltage adjustment also has two scales, 208-264VAC and 416-528VAC. The Model 20VB will auto-range to the appropriate scale. A trip delay adjustment for preventing nuisance tripping during power fluctuations and a restart delay adjustment for preventing short cycling in compressor applications have also been provided. Voltage unbalance trip point is fixed at 6%. The Model 20VB does not require a neutral connection and can be used on either Wye or Delta systems. Operating power for the Model 20VB is drawn from phases A and B. |
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