PMC-220/230 FAQ’s
PMC-220 & PMC-230 Single-Phase Energy Meters
Reliable, Direct-Connect Metering for Residential, Commercial and Light-Industrial Applications
The CET PMC-220 and PMC-230 are compact, direct-connect single-phase energy meters designed for accurate consumption monitoring up to 63 A, offering dependable performance, Modbus communications, and essential features that make them ideal for sub-metering, tenant billing, and BMS integration.
PMC-220/230 FAQs
Can you help specify the size of HRC fuses required for your PMC-220/230?
PMC-220 and PMC-230 meters are direct connect/whole current meters rated at 63Amps and therefore should be installed with a 50Amp HRC fuse.
Can you confirm what the PMC-220 LED pulse output is?
The LED pulse is 1000 imp/kWh. This measures the kWH total i.e. the total consumed solar and grid energy.
Can the PMC-220 pulse output rate be adjusted?
No, the PMC-220 also uses the Energy Pulse Outputs for internal accuracy testing, where the pulse constant is 1000 imp/kWh (1 pulse per Wh) and pulse width is fixed at 80ms±20ms.
What is the short-time overcurrent rating of the PMC-220/230 models?
Specifications for maximum withstand current rating; test reports for the PMC-220/230 state that they meet IEC 62053-21: 2003 requirement for short-time overcurrent without damage, which is 30 x Imax for 10ms.
30 x Imax for PMC-220/230 = 1,890A
At what energy count does the PMC-230 CET meters rollover occur?
The PMC-230 provides Energy measurements for kWh, kvarh Import/Export and kVAh at a resolution of 0.01 kxh and a maximum value of 1,000,000.00 kxh. When the actual energy data reaches 1,000,000.00 kxh, the register value reaches 100,000,000 kxh. This the traditional design of register rollover value for CET meters.
Does the PMC-220 or PMC-230 have an option for external CT’s?
There is no CT option available for these meters. They are direct connect up to 63Amps.
Can you tell me what the watt loss is for the CET PMC-220/230?
These meters draw about 20mA to power themselves, which at 240VAC is <5W. The thermal losses would be equivalent to 10cm of the max supply cable size (25mm2) at the current flow being considered at ambient temperature.
Will I still have power if the meter fails?
The power would continue to flow as normal, however, there would be no meter readings in this case.