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Transparent octal-base phase monitor relay, 8 pins, 1.7 by 2.4 by 2.9 inches

Macromatic

Macromatic PMPU Phase Monitor Relay 190-250V Low

SKU CH-SWTM-6NYTF

Monitors three-phase voltage from 190 to 500 V AC with automatic or manual restart delay up to 300 seconds

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Monitors phase loss, reversal, unbalance, overvoltage and undervoltage for three-phase protection
  • Auto or manual restart with 1 to 300 second delay reduces nuisance tripping
  • SPDT contacts rated 10 A at 277 V AC and 7 A at 30 V DC handle control loads
  • Plug-in octal base fits standard 8-pin sockets for quick installation
  • Compact 2.9 in deep, 2.4 in high, 1.7 in wide body saves panel space

Phase monitor relay for 190–250 V AC systems

The Macromatic PMPU is a plug-in phase monitor relay designed for three-phase circuits operating between 190 and 500 V AC. It monitors overvoltage, undervoltage, phase loss, phase reversal and phase unbalance. An SPDT contact rated at 10 A @ 277 V AC or 7 A @ 30 V DC switches the load. Auto or manual restart with a 1 to 300 second delay is selectable.

Suits panels needing basic three-phase protection

This unit fits installers who need a compact octal-base relay to guard motors or equipment against common three-phase faults. It does not suit applications that require communication interfaces, data logging or per-phase current monitoring. Buyers who need more than SPDT switching or a different voltage window should look at other models.

Octal socket mount frees DIN-rail space

The relay plugs into a standard 8-pin octal socket measuring 1.7 in wide, 2.4 in high and 2.9 in deep. Plug-in mounting allows quick replacement without rewiring and leaves DIN-rail room for other modules. Electrical operating durability is rated at 100,000 cycles. Ensure the control circuit can supply the required coil voltage for the chosen restart mode.

Highlights

  • Monitors phase loss, reversal, unbalance, overvoltage and undervoltage for three-phase protection
  • Auto or manual restart with 1 to 300 second delay reduces nuisance tripping
  • SPDT contacts rated 10 A at 277 V AC and 7 A at 30 V DC handle control loads
  • Plug-in octal base fits standard 8-pin sockets for quick installation
  • Compact 2.9 in deep, 2.4 in high, 1.7 in wide body saves panel space

Specifications

BrandMACROMATIC
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

What supply voltage must my panel provide for this relay to operate?

The relay accepts an input voltage range of 190 to 500 V AC, so your panel must deliver within that window.

Can the 8-pin octal base plug into the socket I already have on my DIN-rail?

Yes, the relay uses an 8-pin octal plug-in base; match that socket pattern on your rail for a direct fit.

How do I verify the relay is protecting my motor after installation?

Apply power and confirm the LED sequence shows normal rotation; the auto restart will engage after the 1 to 300 sec delay if a fault clears.

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