22
The 3-Phase Monitor with adjustable trip and restart delays offers precise system protection for industrial applications. Its broad 190-480 VAC operating range and auto-ranging capability simplify integration into diverse electrical infrastructures. Users can configure trip delays from 1-30 seconds for voltage and unbalance faults, alongside adjustable restart delays from 1-500 seconds. This customization allows for tailored response to transient conditions, preventing unnecessary shutdowns while ensuring equipment safety. The monitor detects under and over voltage, voltage unbalance, and phase loss, safeguarding connected machinery. Dual SPDT output contacts provide flexible control options for alarms or contactor disengagement. Its robust design, with an operating temperature range of -20° to +140° F, ensures reliable operation in demanding environments, contributing to sustained operational uptime and equipment longevity.
A microcontroller-based universal 3-phase monitor for protecting 3-phase
motors from abnormal power conditions. It can detect under voltage, over
voltage, voltage unbalance, reverse phase, and single-phasing even when
regenerated voltage is present. The Model 22 includes adjustable trip
and restart delays to prevent nuisance tripping during power
fluctuations and short cycling in compressor applications. The LED
status indicators and adjustment pots for Voltage Adjustment, %
Unbalance, Restart Delay and Trip Delay are mounted on the front of the
unit for easy access along with 2 SPDT relay contacts. Automatic or
manual restart versions are available. The Model 22 does not require a
neutral connection and can be used on either Wye or Delta systems.
Out of stock
Specifications
| Reset Type | Auto Reset |
|---|---|
| Operating Voltage | 190-480 VAC |
| Power Consumption | 6W at 480V |
| Auto Ranges | Yes |
| Frequency | 50/60Hz |
| Type of Measurement | RMS |
| Under Voltage Trip | 90% ±1% (% of setpoint) |
| Under Voltage Reset | 93% ±1% (% of setpoint) |
| Over Voltage Trip | 110% ±1% (% of setpoint) |
| Over Voltage Reset | 107% ±1% (% of setpoint) |
| Voltage Unbalance Trip | 2-8%, adjustable (conforms to NEMA) |
| Voltage Unbalance Reset | Trip setting minus 0.7% |
| Trip Delay (Voltage/Unbalance Faults) | 1-30 sec., adjustable |
| Trip Delay (Single-Phasing Faults) | 1 sec., fixed |
| Trip Delay (Unbalance > 15%) | 1 sec., fixed |
| Restart Delay | 1-500 sec., adjustable |
| Manual Reset Input | 5V open circuit/500µA short circuit |
| Output Contacts | 2X SPDT 10A at 240VAC resistive |
| Operating Temperature | -20° to +140° F |
| Humidity Tolerance | 0-97% w/o condensation |
| Terminal Torque (Power and Relay) | 9 in lbs max |
| Terminal Torque (Manual Reset) | 5.3 in lbs max |
| Wire Type (Power and Relay) | 12-22 AWG |
| Wire Type (Manual Reset) | 12-30 AWG |
| Enclosure | Noryl plastic |
| Mounting | Surface Mount |
| Additional Options | /SG = Silver with Gold Flash Contacts |
| System Compatibility | Wye or Delta systems |
| Neutral Connection | Not required |
| Dimension Tolerance | ± 0.06 in |
| Mounting Hole Diameter | 0.25 in |
| Warranty | 5-year Unconditional Warranty |
