kWh measurement device - DIN rail consumption meters

kWh measurement device for monitoring and registration

KWh meters measure the actual electrical energy consumption of an electrical installation. There are kWh meters for direct connection and meters that are connected by means of current transformers. With this measurement values up to 6000A can be measured.

Measured value converter

As a measured value converter, the effective pulses on a control system can be switched via pulse outputs with, for example, GLT, SPS, SCADA or with ProData® data logger, including GridVis® network visualization software.

Communication protocols

The M-Bus and Modbus protocols are available via the integrated communication interface. These interfaces can visualize additional values in addition to active and reactive energy, such as voltage, current, power and power factor / cos phi. The kWh meters can be used for collecting consumption data, in combination with the Janitza measuring devices UMG 96RM-E, UMG 604, UMG 605, UMG 508, UMG 509, UMG 511 and UMG 512 via Modbus RTU for partial measurements. Read more about this measuring equipment.

The measurement is designed for 1 phase and 3 phase systems with a voltage of L-N 230 VAC ± 20%. The current inputs are designed for either direct connection (Janitza B21 / B23) or measurement via a current transformer (Janitza B24). Active and reactive energy are available in one tariff or two rates and in four quadrants. The accuracy of the meter is class 1 for active energy and class 2 for reactive energy. All meters store the meter readings as permanent memory.

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The Janitza B21 series is a 1 phase kWh meter (1 + N) with direct measurement of up to 65 Amps. The energy meters use a double rate and have a width of 36 mm, the size of 2 DIN modules. The Janitza B21 kWh meter is MID and IEC approved. The kWh meters use M-bus and Modbus (RTU and ASCII) communication protocols and have two pulse outputs. The Janitza B21 has an S0 interface (potential-free pulse output) according to DIN 43864 for connection to an energy management system.

Features Janitza B21 kWh meter:

• Temperature: -40 ° C to +70 ° C
• Nominal voltage: 230 VAC
• Transitional current: 0.5A
• MID and IEC approved
• Direct measurement up to 65 Amps
• Accuracy class 1 / B (maximum 1% deviation)
• S0 interface (potential-free pulse output)
• Reference current Iref: 5A
• 2-core connection / 1 measuring unit

View Janitza MID B21 kWh meters in the Product Portal

The Janitza B24 series kWh meters are 3 phase meters for indirect measurement (5A) with the use of current transformers. The B24 kWh meter has a configurable current ratio (CT) 9999 / 1-6 with a pulse frequency of 5000 imp / kWh.

Features Janitza B24 kWh meter:

• Temperature: -40 ° C to +70 ° C
• Transformer ratio freely set to 9999 / 1-6
• Nominal voltage: 3x 230 VAC
• Voltage range: 3x 220-240VAC
• For connection with 3 and 4 conductors
• Reference current Iref: 1A
• Transitional current: 0.05A
• MID and IEC approved
• Accuracy class 1 / B (maximum 1% deviation)
• S0 interface (potential-free pulse output)

View Janitza B24 kWh meters in the Product Portal