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PVT: Three Phase Voltage Relay (Microprocessor)

15 Amp Contacts

600V Contact (Available)

Dual Voltage Model

Removeable Terminal Blocks

Over & Undervoltage

Phase Loss

Phase Imbalance

Phase Rotation

Adj. Re-Start Timer


The PVT’s output contacts are energized when: 1. All phases are present, 2. Voltages are within differential %, 3. Phases are in the proper rotation, 4. Phases are balanced, and 5. Re-Start timer has timed out. The PVT uses a re-start timer to allow the three phase line to stablize after a fault and delays re-starting of pumps, compressors and other equipment. The PVT also has a switch selectable voltage option (Series 201) that provides both 208 to 240VAC and 420 to 480VAC, 3Ø in one unit. The installer to select the proper voltage.




Line Voltage: 

110VAC to 600VAC, 3Ø

Frequency: 49Hz to 63Hz

Line Voltage Ranges:

200 Series - 208VAC to 245VAC, 3Ø

300 Series - 380VAC to 415VAC, 3Ø

400 Series - 420VAC to 480VAC, 3Ø

600 Series - 575VAC to 600VAC, 3Ø

Maximum Overvoltage:
15% of highest nominal voltage

Over & Undervoltage:

7% to 15%, Adj. around set point

Phase Imbalance: 5% Typical

Phase Rotation: A - B - C

Phase Loss: <75% of set point

Time Delays:

Re-Start:  Adj. 1 Sec.  to 300 Sec


   •  5 Sec. fixed (Over & Under Voltage, Phase Imbalance,

      Phase Loss)

    • Instantaneous (Loss of all Phases)

LED Indicators:

Fault LED:  Red: Phase Reversal

Green: Phase Loss

Relay LED

Output Contacts:

Gen. Purpose: 15 Amps@250VAC*

Horse Power:    
1/2HP @ 120VAC

1HP @ 240VAC

V-A Rating:  720VA Max.

Rating Code:  A150, A300 & A600

1C: Single Pole Double Throw

2C: Double Pole Double Throw

HV: SPDT, 2 Amps @ 600VAC (6,000 cyc)



Mounting: Din Rail or Surface

Shock Rating: 17g@21 Milliseconds

Termination: Screw Terminals

Removable (Plug-In)

Packaging: Dust Cover

Weight: 8 Oz. Approx.


Ambient Temperatures

Operating: -40°C to 65°C

Storage:  -40°C to 85°C


* All circuits must have a common supply
to maintain a 15 Amp rating per contact. Otherwise total may not exceed 20 Amps.



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