DCPSE: Power meter for 12/24/48 V distribution

DCPSE converters are devices that measure the power consumption of the connected equipment. The function of the device is similar to an electricity meter, but the device is not equipped with a display. Using the data connection (RS-485), the total consumption (Wh), instantaneous consumption (W), voltage and current of the loads can be read from the device.

The instruments are capable of measuring in both positive and negative branches of the distribution system, in both voltage polarities. The device can be configured so that the reverse brake is applied (i.e. when the polarity of the current is reversed – when the load acts as a source, e.g. for batteries – this energy is not added to the total consumption).

A four-quadrant version of the instrument is available at an additional cost, which stores the total consumption in each polarity (direction) of current and voltage in separate counters.

The instruments are normally manufactured without a display, equipped with a galvanically isolated RS-485 communication interface. The communication protocol is either ASCII line protocol or SPINEL binary protocol according to Papouch specification (SPINEL by default, please specify ASCII in the order). MODBUS communication is also available at an additional cost.

Another interface of the instrument is the standard S0 galvanically isolated pulse output.

In case it is appropriate to equip the device with a counter (e.g. if only one unit is installed or if there is no central control system), we also supply separate counters for mounting in the panel of the switchboard or on a DIN rail. These counters are connected to the S0 output of the instrument.

The devices are manufactured in DIN rail version, 35 mm wide (2 circuit breakers). Further technical details and a description of the SPINEL communication protocol are given in the download section at the bottom of the page.

Ranges

The standard current ranges in which the device can be ordered are:

• 1 A
• 5 A
• 10 A
• 20 A
• 50 A
• for connection of an external shunt (can be used for currents up to 1000 A, must be set for the range at the factory)

The standard voltage ranges in which the instrument can be ordered are:

• 12 V nominal (9 – 18 V)
• 24 V nominal (18 – 36 V)
• 48 V nominal (36 – 72 V)
• on request with external power supply 5/12/24/48 V – the instrument then measures from 0 to 72 V
• for higher voltages use STELM meters

The devices can be supplied with Wago clamps or screw terminals for connecting wires with a cross section of up to 16 ^mm2.

The price of the device depends on the selected current range and the choice of communication interfaces.

The price of the device with S0 output and RS-485 communication (SPINEL or ASCII according to the order) and in any of the specified voltage ranges is:

• For connecting an external shunt (can be used for currents up to 1000 A) … 3207 CZK/pc (note: we can supply shunts, depending on the required current, expect the price of the shunt in the range of 1 – 3 thousand CZK/pc). CZK).

Surcharges and discounts

Accessories

• All prices are exclusive of VAT. The delivery time is 3-6 weeks (we can speed up the delivery upon agreement – it is a custom production).
• The devices are developed and manufactured in Brno, Czech Republic.
• Instruments must be ordered by e-mail, fax or letter – they are not yet introduced to the e-shop.

If you need to measure with high precision (corresponding to TP 0.5 for AC meters – there is still no suitable standard for DC meters) and/or in circuits with higher voltages than 72 V, or if you need a meter with an integrated counter, calibratable by CMI, we offer STELM DC meters, primarily developed for photovoltaic applications up to 1 MW.

• Instructions for DCPSE (variant SPINEL, 48V, 50A) (pdf, 334 kB)
• Communication protocol – SPINEL – for DCPSE (variant SPINEL, 48V, 50A) (pdf, 266 kB)