RESET TIMERS

Three-Phase Monitor Relays continuously monitor and detect voltage faults to protect equipment in three-phase systems. These relays retain indication and continue monitoring even with a lost phase. True RMS voltage measurement ensures more accurate sensing across more applications.

Accurate Timing For Critical Applications

An onboard potentiometer makes setting the time delay easy. Termination is convenient with 0.25 inch quick connect terminals. Select from eleven time ranges. An LED indicates timing and relay status.

Surface Mounting

The compact 2” x 2” enclosure installs with a single bolt or screw through the center mounting hole. Models are available with or without memory of timing sequence.

Function:

Function
  • Voltage band relay (10)
  • Over / undervoltage relay w/ fixed time delay on drop-out (8)
  • Over/Undervoltage Relay w/ adjustable time delay on drop-out (5)
  • Over/ Under-voltage Relay w/ adjustable time delay on drop-out (2)

Output:

Output
  • 10A DPDT (16)
  • 10A SPDT (5)
  • 15A SPDT (3)
  • 5A DPDT (1)

Control Voltage:

Timing Range:

TF_Monitored_Voltage
  • 190 - 500V AC (9)
  • 460 - 600V AC (5)
  • 102 - 138V AC (1)
  • 190 - 600V AC (1)
  • 208 - 480V AC (1)
  • 208V AC (1)
  • 240V AC (1)
  • 400V AC (1)
  • 480V AC (1)

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Need a custom engineered product? We offer engineering assistance and quick turnarounds on prototypes.

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RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.1-10 MIN

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.02-2 HOUR

$116.04

RT

Series

Function: 

Memory Enabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.02-2 HOUR

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.6-60 MIN

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.3-30 MIN

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

1.2-120 SEC

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.6-60 SEC

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.3-30 SEC

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.1-10 SEC

$116.04

RT

Series

Function: 

Memory Disabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.2-5 SEC

$116.04

RT

Series

Function: 

Memory Enabled

Control Voltage:

120V AC

Output:

10A SPDT

Timing Range:

0.1-10 MIN

$116.04

RT

Series

Function: 

Memory Enabled

Control Voltage:

240V AC

Output:

10A SPDT

Timing Range:

0.6-60 MIN

$116.04

Frequently Asked Questions About Reset Timers

Macromatic RT series Reset Timers are electronic and microprocessor based. This design approach offers highly reliable, repeatable and accurate timing cycles. The RT series is available with or without memory. For applications that require memory, the standard RT Series retains timing cycle status when power is lost. When power is restored the timer continues timing without resetting the timing cycle. For applications that do not require memory, Macromatic offers the product without memory as well. The non-memory version resets the timing cycle to zero when power is removed. When power is reapplied, the timing cycle always starts at the beginning.

Reset Timers Download

Reset Timer

Knowledge Base Articles

Technical reports to answer your questions

Understanding A2L: There Are Code Changes That Need Consideration

Rapid Cycling of Control Switch Damages Large Pumps or Compressor Motors

Issue: How do I prevent a Bouncing Control Switch Due to Splashing Water from Rapidly Energizing One Load and Then the Other?   Solution/Resolution:  In Figure A, a single Control Switch could be susceptible to splashing water which would cause rapid opening & closing of the Control Switch.  Each time this

Interactive Competitive Cross-Reference

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Troubleshooting for a Phase Reversal (Phase Sequence) Problem

Issue: I have purchased one of your three phase monitor relays and have connected it per the diagram on the unit. However, I cannot get the unit to operate–it just won’t turn on. What’s wrong? Solution/Resolution: Most problems when first installing and applying a three-phase monitor relay are due to

Need Answers? Look Here.

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