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Ground Resistance Signaling Module

With the new ground resistance signaling module, in the grounded operating mode, WAGO offers not only detection of 0 V grounding, but also fully automatic detection of resistance values below a non-adjustable, unbalanced insulation resistance between ground and +24 V or 0 V of the supply voltage.
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Properties

Properties

1

Clear Signaling

Clear Signaling

Signaling occurs via LEDs and a potential-free contact when the value falls below a specified limit.

2

Operating Mode Selection

Operating Mode Selection

Switch between grounded and ungrounded operation via S1 slide switch

3

Convenient Connection Technology

Convenient Connection Technology

Easy connection via Push-in CAGE CLAMP® and a push-button for all conductor types

4

Automated Evaluation

Automated Evaluation

Check the insulation resistance between the +24 V/0 V terminals and ground in grounded control circuits (every 10 seconds) and ungrounded control circuits (every second)

The Evolution of the Ground Resistance Signaling Module

Single Wire

  • Immediate fuse tripping in the event of a ground fault
  • Immediate system shutdown
  • No pre-warning

Ground Conductor Disconnect Terminal Block – Manual Insulation Resistance Test

  • Immediate fuse tripping in the event of a ground fault
  • Immediate system shutdown
  • Detection of potential ground faults through routine manual maintenance
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Ground Resistance Signaling Module – Automatic Insulation Resistance Testing

The ground resistance signaling module offers the industry’s best cost–benefit ratio and is easy to use. Replacement of the previous ground conductor disconnect terminal block is straightforward. Only two additional wires have to be connected to the PLC to make the potential-free contact ready for evaluation.

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Advantages of the Ground Resistance Signaling Module over the Mechanical Ground Conductor Disconnect Terminal Block – in Practice

  • Manual testing for emerging ground faults replaced by fully automated monitoring
  • Reduction of the inspection interval from approx. 3 months to 10 seconds
  • Immediate further signaling by potential-free contact for signaling to PLC

Example Applications

Starting point and result

Upgrading from a ground conductor disconnect terminal block to a ground resistance signaling module

Wherever a ground conductor disconnect terminal is currently in use, a ground resistance signaling module can easily be retrofitted for fully automated monitoring.

Two 24 VDC power supplies require only one ground resistance signaling module

Even with two or more power supply units connected in parallel, one ground resistance signaling module suffices for ground-fault monitoring.