Excitation (aka Wake up or Minimum Pickup) Current for the PM800 Series

Issue
Excitation (aka Wake up or Minimum Pickup) Current for the PM800 Series.

Product Line
PM800 Series (PM810, PM820, PM850, PM870)

Environment
PM800 series meters during initial current detection and metering operation.

Resolution
The PM800 series meets IEC 62053-8 standards, which dictate that the minimum pickup current is 5 mA.

There must be a minimum of 5 milliamps of current on the CT secondaries for the meter to begin metering current:

• For a 5 A secondary, this corresponds to 0.1% load.
• For a 1 A secondary, this corresponds to 0.5% load.

Once this minimum current is present, the meter will wake up and start measuring current accurately.