ZEM-65
Three-phase metering at Class 0.5S for the whole measurement, with the current sensors connected and calibrated before it ships. Rogowski coils connect directly, with no integrator, and readings travel over the Zigbee mesh to the Gateway.
From €625 ex VAT
Works with the Gateway
Most three-phase meters are sold on their own, and the accuracy class covers the meter alone. A ZEM’s current transformers are fitted and calibrated against that meter before it ships, so Class 0.5S describes the whole measurement. Nothing to size, match or calibrate on site.
Rated to IEC 62053-22 for the meter and its current sensors together, from 0.1 A to 3 kA, with frequency to ±0.01 Hz.
A Rogowski coil normally needs an integrator between it and the meter: another box to buy, power and wire. The ZEM takes the coil directly, on the same terminals as a split-core CT.
Readings travel over Zigbee, so nothing has to be run back to a panel or a gateway, and there is no serial bus to address, terminate or commission. Mount it, clip the CTs on, reference the voltage, and it reports.
IP67 and double-insulated, so it can go inside or outside an electrical panel, indoors or out, from −30 °C to 60 °C. Standard supplies: 110–480 V AC line to line, 3-wire or 4-wire, 50 or 60 Hz, rated CAT III at 480 V.
Turn each feed on or off individually to suit the site.
AES-128 on the mesh and TLS 1.2 or later from the Gateway onwards. No EpiSensor cloud service is required, and customer data never passes through our servers.
Readings reach the Gateway over a self-healing Zigbee mesh. Each mains-powered device adds about 1,000 m² of coverage, and one Gateway carries 250 devices.
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It reports over the Zigbee mesh to the Gateway, which runs Edge on site.
Class 0.5S is the active-energy accuracy class in IEC 62053-22. A meter is normally tested on its own, and the current transformers fitted on site add their own error. Each ZEM is calibrated with the current sensors it ships with, so the class describes the meter and its sensors together, from 0.1 A to 3 kA.
Size it to the per-phase current of the circuit and to the conductor it has to go around. The 120 A split-core CT has a 14 mm aperture. For larger cables and busbars the flexible Rogowski coils go around 70 mm (300 A) or 120 mm (1000 A and 3000 A) conductors.
Not with a ZEM. The coil lands on the same terminals as a split-core CT and the ZEM integrates the signal itself, so there is no separate integrator to buy, power or wire.
A qualified electrician, to local wiring rules. The ZEM is IP67 and double insulated, so it can go inside or outside a panel, indoors or out, from −30 °C to 60 °C. It needs a voltage reference and an auxiliary supply of 85 to 480 V AC.
Up to 50 m indoors and 300 m outdoors between devices. Every mains-powered EpiSensor device also relays for its neighbours, so coverage grows as the network grows: on average each one adds about 1,000 m² of commercial floor area.
No. Readings go to the ZGW-20 Gateway, where Edge stores and shows them and sends them to the platforms you choose. No customer data passes through EpiSensor servers.
