BITUO TECHNIK SPM02V3

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 24 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The SPM02 is a three-phase energy meter made by Shanghai Bituo Electric under the BITUO TECHNIK name. It measures voltage, current, power and energy on each phase of a 3P+N system. Each phase conductor passes through its own hole in the housing, up to 16 mm² cable, and three voltage leads plus a neutral connect to the supply. It needs no space on the DIN rail: one variant plugs into the terminals of the circuit breaker, the other hangs on the cables.¹

Power

Mains. Powered from the phase voltage leads it measures, 110 to 240 V AC phase to neutral. It draws 0.7 W in use.¹

System

3P+N, not for IT systems¹

Rated voltage

110 to 240 V AC phase to neutral, 208 to 415 V AC phase to phase, 50/60 Hz¹

Current

10 A basic, 63 A maximum per phase¹

Starting current

50 mA¹

Accuracy (IEC 61557-12)

Unverified for the SPM02V3 identifier; confirm -CL1 ordering suffix and Cl.1 housing mark⁵

Cable through the holes

Up to 16 mm²¹

Own consumption

0.7 W in use, 1.4 W in pairing mode¹

Operating temperature

-25 to 60 °C¹

Dimensions (H × W × D)

46.4 × 53.0 × 21.3 mm¹

Protection

IP20, overvoltage category III, pollution degree 3¹

Insulation

440 V rated insulation, 4 kV impulse withstand¹

Zigbee module

Tuya ZS2S (Silicon Labs EFR32MG21)¹

Standards

IEC 61557-12, IEC 61326-1, ETSI EN 300 328, ETSI EN 301 489-1 and -17¹

Reporting interval

5 to 3600 s, 30 s default⁴

Where it is used

• Three-phase sub-metering of shops, restaurants, offices and hotel floors, where the board has no free DIN rail space.

  Tenant submetering and cost allocation

• Commercial air conditioning and lighting circuits, measured per phase.

  HVAC energy monitoring for commercial buildings

• Import and export on a three-phase supply for EV charger load balancing and solar self-consumption.

  EV charging load management

Interface

Readings and settings, with units and ranges where BITUO TECHNIK publishes them. R readable, R·W readable and writable.

Energy flowing in the direction of the arrow on the housing counts as forward (consumed) energy; energy flowing against it counts as produced energy, per phase and in total.^1, 4

Voltage is reported in steps of 0.1 V, current in 0.001 A, energy in 0.01 kWh and frequency in 0.01 Hz. Power factor is a percentage.⁴

Setup

1. Isolate and wire the voltage leads

   With the supply off, connect brown (or red) to line X, black (or green) to line Y, grey (or yellow) to line Z and blue to neutral. On the breaker-mounted variants the terminal plates go into the breaker's terminals. Bituo says only qualified electricians should install it.¹

2. Pass each phase through its own hole

   Pass line X through hole X, Y through Y and Z through Z, so each current matches its voltage. Keep the arrow in the direction of normal flow, and never pass a line and the neutral through the same hole.¹

3. Put it into pairing mode

   Open pairing on the Gateway's Zigbee network in Edge, then press the reset button for 3 to 5 seconds. The LED flashes twice a second while the meter is in pairing mode.¹

4. Check each phase

   Compare each phase voltage and current with a clamp meter. If a consumption circuit shows produced energy on one phase, that conductor passes through its hole the wrong way.

Common questions

Does the SPM02 need a Tuya hub?

No. Bituo states that its Tuya Zigbee variants can be identified by universal Zigbee coordinators, so it joins the Zigbee radio on an EpiSensor Gateway directly.¹

How accurate is it?

Check the complete ordering code and housing, rather than the SPM02V3 Zigbee name. Bituo identifies its Class 1 hardware with a -CL1 suffix and a Cl.1 side marking. The manual states Class 1 for current, active power and forward energy, but we have not verified that every unit matching this Zigbee definition has that rating.^1, 5

Can it measure solar export?

Yes. It measures energy in both directions. Energy flowing with the arrow counts as consumed and energy flowing against it as produced, on each phase and in total.^1, 4

Where can it not be installed?

It is not suitable for IT systems. Bituo warns that it can be damaged downstream of a contactor, frequency converter or motor starter; the upstream (U) variants go on the supply side of those devices.¹