Protection cathodique

Measurement shunts

Name: Measurement shunts
Brand: IPSI Solutions
SKU: DIP-050

Réf. DIP-050

Measurement shunts from 1 to 6000 A for monitoring cathodic protection DC current. Default voltage 100 mV (50 or 200 mV on request), class 0.5 or 1.

Measurement shunts: overview

IPSI Solutions offers a complete range of shunts from 1 A to 6000 A for monitoring cathodic protection direct current. The voltage is 100 mV by default (50 or 200 mV on request) and the accuracy class 0.5 or 1.

The shunts must be installed horizontally, with the resistance blades placed vertically to allow natural air convection; the clamping bolts must be tightened to minimise contact resistances. At nominal operation, the temperature rise is about 120 °C; after one hour at full load, the blade temperature must not exceed 150 °C to maintain an accuracy better than 0.5%.

What a shunt is for

Measuring a protection current directly means opening the circuit and inserting an ammeter. The shunt avoids this: permanently installed in the circuit, it produces a small voltage proportional to the current, read with a simple voltmeter. This is how the output of a rectifier or an anode circuit is checked at every visit.

How to size it

The rating is chosen from the circuit's maximum current, with a margin so that it does not run permanently at full load. The installation instructions above are not a detail: a shunt that overheats or is poorly tightened loses accuracy, and the protection current reading becomes wrong.

Measurement shunts: technical specifications

Current range	1 to 6000 A
Voltage	100 mV by default (50 or 200 mV on request)
Accuracy class	0.5 or 1
Installation	Horizontal, vertical blades (natural convection)
Nominal temperature rise	≈ 120 °C (max 150 °C to maintain ±0.5%)
Use	Monitoring of cathodic protection DC current