Visual Indicator Protective Relays and Monitoring Relays
Description
Visual Indicator Protective Relays and Monitoring Relays are devices designed to monitor electrical circuits and provide visual feedback on the status of the system. These relays are equipped with visual indicators such as LEDs or screens that display various conditions of the system, allowing for easy identification of issues. They are used to detect changes in electrical parameters like voltage, current, and frequency, and can trigger actions such as opening or closing electrical contacts to protect the system from faults.
Working Principle
These relays operate by continuously measuring electrical parameters and comparing them to pre-set thresholds. When a parameter deviates from its normal range, the relay activates its protective function, which may include tripping a circuit breaker or sending an alarm signal. The visual indicators provide real-time feedback on the system's status, making it easier for operators to diagnose and address issues. The integration of digital technology in these relays enhances their functionality, allowing for programmable settings and automatic resets, which improve their reliability and ease of use.
Applications
Visual Indicator Protective Relays and Monitoring Relays are used in various applications where real-time monitoring and protection of electrical systems are critical. For example, they are employed in power distribution systems to monitor voltage levels and ensure synchronization between different power sources. They are also used in industrial settings to protect motors from phase imbalances or overloads, preventing potential damage and downtime.
Advantages over other Protective Relays and Monitoring Relays
One of the key advantages of these relays is their visual indication feature, which provides immediate feedback on the system's status, reducing the time needed for troubleshooting. Additionally, the integration of digital technology allows for more precise monitoring and control, offering features like programmable time delays and automatic resets that are not typically available in traditional electromechanical relays. This makes them more versatile and user-friendly in complex electrical systems.
Limitations
Despite their advantages, Visual Indicator Protective Relays and Monitoring Relays have limitations. They may require a higher initial investment compared to simpler relay types due to their advanced features and digital components. Additionally, their reliance on electronic components can make them more susceptible to issues related to electromagnetic interference or power surges, which can affect their performance and reliability.
Considerations
When selecting these relays, it is important to consider factors such as initial costs, operating expenses, and maintenance requirements. While they may have higher upfront costs, their advanced features can lead to long-term savings by reducing downtime and maintenance needs. Durability and accuracy are also critical considerations, as these factors will impact the relay's performance and lifespan. Regular maintenance and calibration may be necessary to ensure optimal operation and to extend the life of the device.
from Time Mark Corporation
The Model 2500 3-Phase Monitor is designed to continuously monitor 3-phase power lines for abnormal conditions. This device features solid-state voltage and phase-angle sensing circuits, which drive a SPDT electromechanical output relay. When the correct voltage and phase sequence is applied to a... [See More]
- Features: Automatic Reset; Programmable Time Delay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal; Unbalance
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay; Synchronous Check (Paralleling)
from Perfect Switch, LLC
Programmable Autonomous Relays have an integrated factory programmable microcontroller with options like timing features, delays, voltage sensing turn-on or turn-off, and logic feedback for easy system integration. Commonly used as a traditional Low Voltage Disconnect, the POWER-GATE Autonomous... [See More]
- Features: Programmable Time Delay; Sealed Relay; Visual Indicator; Programmable
- Current Sensitive Relay: Over-Current Protection; Undercurrent
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay
from GE Grid Solutions
Multilin 889. Comprehensive Protection and Management for Small to Large Sized Generators. The Multilin 889 relay, a member of the Multilin 8 Series protective relay platform, has been designed for the protection, control, monitoring and management generators and in-zone transformers used in both... [See More]
- Features: Visual Indicator
- Current Sensitive Relay: Current Differential
- Voltage Sensitive Relay: Differential Voltage
from Solcon Solutions LLC
Low Voltage Medium Voltage - up to 15kV with an additional resistor box Rated Supply Voltage110V - 230VThe MIP-6 monitors the level of deterioration in the insulation of low -and/or medium-voltage motors. It measures the motor's insulation resistance and displays the actual and average highs and... [See More]
- Features: Visual Indicator
- Operating Temp: 32 to 140
- Supply Voltage Range: 110 to 230
from Macromatic Industrial Controls, Inc.
The CM Series is used to detect either an overcurrent or undercurrent condition. The pick-up current setting is user-adjustable within one of three ranges as shown in the Product Selection Table below. An external current transformer can be used to extend the range beyond 10 amperes. Choose between... [See More]
- Features: Automatic Reset; Visual Indicator
- Protective Functions: Time Delay
- Current Sensitive Relay: Over-Current Protection; Undercurrent
- Current Sensing Range: 0.1000 to 1
from SOCOMEC
ATyS C30/C40 are modular control relays. They ensure the automatic control of remotely controlled transfer switches, ATyS, ATyS S and ATys M, as well as contactors, circuit breakers or other motorised switches. Advantages Auxiliary power supply. Two versions of the ATyS C30 are available. One... [See More]
- Features: Visual Indicator
- Supply Voltage Range: 9 to 30
- Voltage Sensing Range: 100 to 400
from CARLO GAVAZZI Automation Components
The DEA71 is a modular residual current relay which, in conjunction with the MCB and the CT, provides the protection of people against electrocution, or protection of properties against fire, by interrupting the mains on faulty loads or lines. The setpoint of the leakage current is factory set to... [See More]
- Features: Visual Indicator
- Protective Functions: Time Delay
- Power (Phase) Sensing: Ground (Earth) Fault
- Current Sensing Range: 0.0300 to 0.3000
from Time Mark Corporation
The Model 2501 3-Phase Monitor is designed to continuously monitor 3-phase power lines for abnormal conditions. This device features solid-state voltage and phase-angle sensing circuits, which drive a SPDT electromechanical output relay. When the correct voltage and phase sequence is applied to a... [See More]
- Features: Automatic Reset; Programmable Time Delay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal; Unbalance
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay; Synchronous Check (Paralleling)
from Solcon Solutions LLC
Medium Voltage Control supply voltage:110V - 230V - 110-230V AC/DC Separate AUX19-60 VDC The MPS-3000 delivers a complete motor protection and control package. Monitoring 3-phase currents and voltage together with 10 RTD/Thermistor temperature inputs makes it an ideal solution for Medium and large... [See More]
- Features: Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Sequence
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Current Sensitive Relay: Over-Current Protection; Undercurrent
from Macromatic Industrial Controls, Inc.
The CO Series is used to detect an overcurrent condition. The pick-up current setting is user-adjustable within one of three ranges as shown in the Product Selection Table below. An external current transformer can be used to extend the range beyond 10 amperes. Choose between a fixed drop-out... [See More]
- Features: Automatic Reset; Programmable Time Delay; Visual Indicator
- Protective Functions: Time Delay
- Current Sensitive Relay: Over-Current Protection
- Current Sensing Range: 0.1000 to 1
from SOCOMEC
RESYS M40 earth leakage relays associated with a remote trip breaking device (automatic power breaking), provide the following functions: - protection against indirect contact,. - limitation of leakage currents. They also preventively monitor electrical installations via their (configurable)... [See More]
- Features: Sealed Relay; Visual Indicator
- Power (Phase) Sensing: Ground (Earth) Fault
- Voltage Sensitive Relay: Differential Voltage
- Protective Functions: Time Delay
from CARLO GAVAZZI Automation Components
The DUB72 features two independent set levels and outputs, which allow the use of one as a pre-alarm and the second one as an alarm. With a high powered electromechanical 20 amp relay, the second threshold / relay can be used to directly disconnect a battery or load. Its low-profile DIN housing can... [See More]
- Features: Visual Indicator
- Voltage Sensing Range: 15 to 30
- Voltage Sensitive Relay: Undervoltage
- Supply Voltage Range: 15 to 30
from Time Mark Corporation
The Model 2581 3-Phase Monitor is designed to continuously monitor 3-phase power lines for phase loss, low voltage and phase reversal. The Model 2581 Monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and... [See More]
- Features: Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Solcon Solutions LLC
Medium Voltage For Protection of Motors and Systems Against Overheating The TPR-6 protects electric motors, transformers, and other systems from overheating. The TPR-6 has up to 14 temperature inputs that can be programmed to measure thermistors (PTC or NTC) and RTDs (Pt100). [See More]
- Features: Visual Indicator
- Supply Voltage Range: 100 to 230
from Macromatic Industrial Controls, Inc.
The CU Series is used to detect an undercurrent condition. The drop-out current setting is user-adjustable within one of three ranges as shown in the Product Selection Table below. An external current transformer can be used to extend the range beyond 10 amperes. The pick-up current setting is fixed... [See More]
- Features: Automatic Reset; Programmable Time Delay; Visual Indicator
- Protective Functions: Time Delay
- Current Sensitive Relay: Undercurrent
- Current Sensing Range: 0.1000 to 1
from SOCOMEC
RESYS P40 earth leakage relays associated with a remote trip breaking device (automatic power breaking), provide the following functions: - protection against indirect contact,. - limitation of leakage currents. They also preventively monitor electrical installations via their (configurable)... [See More]
- Features: Sealed Relay; Visual Indicator
- Protective Functions: Time Delay
- Power (Phase) Sensing: Ground (Earth) Fault
- Current Sensing Range: 0.0300 to 30
from Time Mark Corporation
The Model 246 3-Phase Monitor is designed to continuously monitor 3-phase power lines for abnormal conditions. This device features solid-state voltage and phase angle sensing circuits, which drive a SPDT electromechanical relay. A neutral is not required, allowing the Model 246 to be used with... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
The PAP Series Phase Monitor Relays provide protection against phase loss, phase reversal & undervoltage in a compact plug-in design. These devices are designed to be compatible with most Wye or Delta systems. Phase Monitor Relays protect against single phasing regardless of any regenerative... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Line Voltage Range: 90 to 120
from SOCOMEC
RESYS M40R earth leakage relays associated with a remote trip breaking device (automatic power breaking and reclosing), provide the following functions: - protection against indirect contact,. - limitation of leakage currents. - reclosing of trip breaking device after earth leakage detection and... [See More]
- Features: Sealed Relay; Visual Indicator
- Protective Functions: Time Delay
- Power (Phase) Sensing: Ground (Earth) Fault
- Current Sensing Range: 0.0300 to 30
from Time Mark Corporation
The Model 259 3-Phase Monitor is designed to protect individual 3-phase equipment and motors, or in conjunction with shunt trip breakers. When correct voltage and phase rotation is applied, an internal DPDT relay energizes. A fault condition (phase loss, phase reversal, or low voltage) drops out the... [See More]
- Features: Automatic Reset; Programmable Time Delay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Time Delay; Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
The PCP Series Phase Monitor Relays provide protection against phase reversal in a compact plug-in design. One version will work on any 3 phase system from 208V to 480V (a separate 120V-only version is also available). These devices are designed to be compatible with most Wye or Delta systems. The... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Line Voltage Range: 120
- Power (Phase) Sensing: Reversal
- Approvals: UL, RU
from Time Mark Corporation
The Model 2594 3-Phase Monitor is designed for use with applications which require high control voltage (up to 600VAC). The Model 2594 protects 3-phase equipment and motors from phase loss, phase reversal and low voltage. When the correct voltage and phase rotation is applied, an internal DPDT relay... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
The PLP Series Phase Monitor Relays provide protection against phase loss & phase reversal in a compact plug-in design. These devices are designed to be compatible with most Wye or Delta systems. Phase Monitor Relays protect against single phasing regardless of any regenerative voltages. The... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Line Voltage Range: 120
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Approvals: UL, RU
from Time Mark Corporation
The Model 263 continuously monitors 3-phase power systems for phase loss, low voltage and phase reversal. The monitor consists of a solid-state sensing circuit, driving an electromechanical relay. Applying correct voltage and phase rotation energizes the relay. When properly adjusted, a fault... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
The PMD Series Phase Monitor Relays utilize a microprocessor-based design to provide protection against phase loss, phase reversal, phase unbalance, undervoltage and overvoltage. The PMDU is a universal voltage product that works on any three-phase system voltage from 208-480V (separate 120V &... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal; Unbalance
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay
from Time Mark Corporation
The Model 264 3-Phase Monitor continuously monitors 3-phase Wye or Delta systems for abnormal conditions. The solid-state electronic sensing circuit drives two separate single pole relays, one normally open and the other normally closed. An adjustable trip delay reduces or eliminates nuisance... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
The PMP Series Phase Monitor Relays utilize a microprocessor-based design to provide protection against phase loss, phase reversal, phase unbalance, undervoltage and overvoltage. The PMPU is a universal voltage product that works on any three-phase system voltage from 208-480V (a separate 120V... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal; Unbalance
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay
from Time Mark Corporation
The Model 2642 protects electrical equipment by sensing phase loss, low voltage and reverse phase conditions. The monitor uses a combination of voltage and phase-angle sensing, and will detect a phase loss even when regenerated voltages are present. The Model 2642 is fail safe; the output contacts... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
Voltage Band Relays provide protection to equipment that is required to operate within an upper & lower voltage limit. As long as the operating voltage remains within an OVER & UNDER voltage range, the internal relay stays energized. If the operating voltage falls outside this range, the... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Protective Functions: Time Delay
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Voltage Sensing Range: 18 to 30
from Time Mark Corporation
The Model 2644 3-Phase Monitor continuously monitors 3-phase Wye or Delta systems for abnormal conditions. The solid-state electronic sensing circuitry drives an internal DPDT relay, allowing the Model 2644 to operate two motor control circuits, or a control circuit and an alarm circuit. An... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
Over/Under Voltage Relays provide protection to equipment where an over or under voltage condition is potentially damaging. They are designed to operate when the operating voltage reaches a preset value and drop-out when the operating voltage drops to a level below the preset value. The pick-up... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Protective Functions: Time Delay
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Voltage Sensing Range: 16 to 27
from Time Mark Corporation
The Model 265 3-Phase Monitor continuously monitors 3-phase Wye or Delta systems for phase loss, low voltage and phase reversal. When properly adjusted, the Model 265 Monitor will detect phase loss on a loaded motor even when regenerated voltage is present. The solid-state sensing circuit drives an... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Macromatic Industrial Controls, Inc.
Over/Under Voltage Relays provide protection to equipment where either an over or under voltage condition is potentially damaging. They are designed to operate when the operating voltage reaches a preset value and drop-out when the operating voltage drops to a level below the preset value. The... [See More]
- Features: Automatic Reset; Sealed Relay; Visual Indicator
- Protective Functions: Time Delay
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Voltage Sensing Range: 16 to 27
from Time Mark Corporation
The Model 2652 3-Phase Monitor is designed to protect motors, pumps, HVAC equipment, air compressors, etc. , by sensing phase loss, low voltage or phase reversal. With correct power applied, the DPDT output contacts transfer, and drop out when a fault condition or loss of power occurs. An adjustable... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 158 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 158 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Time Delay (optional feature); Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 252 3-Phase Monitor continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 252 will detect phase loss on a loaded motor even when regenerated voltage is present. The device consists of a solid-state voltage and phase-angle sensing circuit,... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 2522 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 2522 will detect phase loss on a loaded motor even when regenerated voltage is present. This unit consists of a solid-state voltage and phase-angle sensing circuit, driving an... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 257 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 257 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 258 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 258 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a solid-state voltage and phase-angle sensing circuit, driving an... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 2638 3-Phase Monitor combines a 3-phase monitor with a line voltage and phase sequence indicator. Like other Time Mark Monitors, the Model 2638 senses phase loss, phase reversal and low voltage. When power and phasing are correct, the internal relay energizes. LED indicators will show that... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
The Model 18 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 18 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a microcontroller with a voltage and phase-angle sensing circuit,... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Time Delay
from Time Mark Corporation
The Model 19 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 19 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. This device consists of a microcontroller with a voltage and phase-angle sensing circuit,... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Undervoltage
- Protective Functions: Time Delay
from Time Mark Corporation
The Model 2002Y 3-Phase Voltage Unbalance Monitor is designed to continuously monitor a three-phase line with a neutral connection for unbalanced voltage conditions. This device will only energize the relay if an unbalance exists. Zero volts on all three phases is considered a balanced condition. [See More]
- Features: Automatic Reset; Visual Indicator
- Protective Functions: Synchronous Check (Paralleling)
- Power (Phase) Sensing: Unbalance
- Voltage Sensing Range: 69 to 120
from Time Mark Corporation
The Model 200 3-Phase Voltage Unbalance Monitor is designed to continuously monitor a three-phase line for unbalanced voltage conditions. This device will only energize the relay if an unbalance exists. Zero volts on all three phases is considered a balanced condition. This allows the Model 200 to... [See More]
- Features: Automatic Reset; Visual Indicator
- Protective Functions: Synchronous Check (Paralleling)
- Power (Phase) Sensing: Unbalance
- Voltage Sensing Range: 102 to 138
from Time Mark Corporation
The Model 1732 AC Current Monitor is a single set-point current monitor. It can be used to detect either over current or under current, depending on whether the trip point is set above or below the input current. Dual LED indicators on the front or top of the unit give a clear visual reference for a... [See More]
- Features: Visual Indicator
- Current Sensing Range: 25 to 150
- Current Sensitive Relay: Over-Current Protection; Undercurrent
- Frequency Sensing Range: 50 to 400
from Time Mark Corporation
The Model 269 Over and Under 3-Phase Monitor continuously monitors 3-phase lines for high voltage, low voltage, phase loss or phase reversal. This device features a solid-state voltage and phase-angle sensing circuit, which drives a SPDT output relay. The Model 269 is independent of the system load,... [See More]
- Features: Automatic Reset; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Synchronous Check (Paralleling)
from Time Mark Corporation
Model 25 True RMS 3-Phase Monitor has a display that shows the voltage with an accuracy of +/- 0.5%. The display is updated every second and re-initialized every 30 seconds. Model 25 has a rotary encoder with switch on the unit. By pressing the encoder switch for more than 5 seconds, the unit will... [See More]
- Features: Programmable Time Delay; Visual Indicator
- Power (Phase) Sensing: Phase Failure (Loss); Reversal; Unbalance
- Voltage Sensitive Relay: Overvoltage Protection; Undervoltage
- Protective Functions: Time Delay