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Macromatic phase monitor relay, 12-pin DIN-rail module, grey enclosure

Macromatic

Macromatic Phase Monitor Relay 12 Pins 190-500VAC

SKU CH-3R4Q-X4RCP

Monitors three-phase power for overvoltage, undervoltage, phase loss, reversal and unbalance with a 12-pin DIN-rail relay rated 10 A at 277 V AC

  • TypeIndustrial Electrical Controls & Automation
  • Monitors overvoltage, phase loss, reversal, unbalance and undervoltage
  • 190-500 VAC input range covers wide industrial supplies
  • Auto and manual restart with 1-300 second delay
  • 10 A DPDT contacts rated for 277 VAC and 30 VDC
  • Compact 2.1 x 3.5 x 2.4 in DIN-rail mount design

What this phase monitor relay does

The Macromatic phase monitor relay protects three-phase equipment by detecting overvoltage, undervoltage, phase loss, phase reversal and phase unbalance across a 190 to 500V AC range. It switches a DPDT contact rated at 10 A for both 277V AC and 30V DC loads. The unit mounts on a DIN rail and operates at 50 or 60 Hz.

Installation notes and common pitfalls

The relay uses a 12-pin base that fits standard DIN-rail sockets, so wiring is straightforward for panel builders familiar with industrial control gear. A frequent issue is incorrect pin-to-function mapping during first installation; always verify the socket wiring against the manufacturer diagram before applying power. The restart delay is adjustable from 1 to 300 seconds and supports both automatic and manual restart modes.

Who should use this and who should not

This relay suits maintenance teams and OEM panels that need basic three-phase voltage supervision with automatic or manual restart flexibility. It is not intended for applications requiring single-phase monitoring, DC bus supervision, or communication protocols such as Modbus or Ethernet. Buyers who need integrated current sensing or programmable logic functions should look at a different class of device.

Highlights

  • Monitors overvoltage, phase loss, reversal, unbalance and undervoltage
  • 190-500 VAC input range covers wide industrial supplies
  • Auto and manual restart with 1-300 second delay
  • 10 A DPDT contacts rated for 277 VAC and 30 VDC
  • Compact 2.1 x 3.5 x 2.4 in DIN-rail mount design

Specifications

BrandMACROMATIC
TypeIndustrial Electrical Controls & Automation

Questions about this item

How do I confirm the relay is protecting the motor after wiring it to the 12-pin base?

Apply three-phase power between 190 and 500 VAC; the status LED should show normal and the DPDT contacts will close, allowing the load to run.

What comes in the box and what must I source separately?

The relay module itself is supplied; you must provide a compatible 12-pin socket, DIN rail, and wiring for the 10 A contact circuits.

Which restart mode should I select for a pump that needs a fixed delay after a phase-loss trip?

Set the restart selector to Manual and adjust the delay potentiometer within the 1 to 300 sec range to match the pump's recommended restart interval.

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