<![CDATA[DLMS/COSEM Limiter Object (Class 71) for Demand Limiting & Overload Tripping]]>

<![CDATA[DLMS/COSEM Limiter Object (Class 71) for Demand Limiting & Overload Tripping]]>Class 71 (Limiter) Configuration Guide

Class 71 provides autonomous on-meter monitoring to protect distribution transformers from local consumer overloads.

Architecture

Monitored Value (Attribute 2): References Class 3/4 register, e.g. Active Power (+P) 1.0.1.7.0.255.
Threshold Normal (Attribute 3): e.g. 10000 W (10 kW).
Threshold Emergency (Attribute 4): e.g. 15000 W (15 kW during grid emergencies).
Min Over Threshold Duration (Attribute 5): e.g. 30 seconds (avoids tripping on motor inrush current).
Action Over Threshold (Attribute 7): Calls script to open contactor (Class 70).
Action Under Threshold (Attribute : Calls script to reconnect or signal availability.

Configuring the debounce duration properly is critical to prevent nuisance tripping during air-conditioner startup spikes.

]]>https://dlms.sharur.org/topic/33/dlms-cosem-limiter-object-class-71-for-demand-limiting-overload-trippingRSS for NodeFri, 16 Oct 2026 19:48:59 GMTSat, 22 Aug 2026 12:36:29 GMT60<![CDATA[Reply to DLMS/COSEM Limiter Object (Class 71) for Demand Limiting & Overload Tripping on Sat, 22 Aug 2026 12:36:32 GMT]]>We set min_over_threshold_duration to 45 seconds in our residential prepaid deployments. It successfully allows heat pump startup surges while cutting off sustained illicit overloads.

]]>https://dlms.sharur.org/post/77https://dlms.sharur.org/post/77Sat, 22 Aug 2026 12:36:32 GMT