This solutions guide illustrates the use of two Shelly Pro 3EM energy meters paired with Shelly Switch Add-on modules and 63 amp contactors. This solution enables users to meter and control two 240v appliances. The enclosure can be installed on the panel, or either inline or at the appliances if located together.

The Shelly Pro 3EM

The Shelly Pro 3EM is a three-phase energy meter and din rail form factor that has been factory calibrated for Class B accuracy.

• The Pro 3EM is a passive measurement device.

• A 500-watt minimum load is required per channel for accurate measurement.

• If the total load for the device is under 30va, the meter will not accumulate updated data until the load is increased.

• The Shelly Pro 3EM is available in 120-amp or 400-amp CT configurations.

The Shelly Pro 3EM Switch Add-On

The Shelly Pro 3EM Switch Add-on module allows the 3EM to trigger contactor coils rated up to 2 amps.

Notes

• 10 AWG gauge wire is used for the contactors. The terminal blocks selected support up to 6 AWG. A larger wire gauge requires larger terminal blocks and enclosure.

• DSS10N-03P is preferred in this setup to jumper incoming DK10N-BK terminals.

Critical

• The Shelly Pro 3EM is powered via a line connection to terminal C and should be used for single phase. Use A and C with split single phase or two phase. Use A, B, and C for three phases.

• The Shelly Pro 3EM is powered via a line connection to terminal C and should be used for single phase. Use A and C with split single phase or two phase. Use A, B, and C for three phases.

• You must leave enough slack in the wires feeding the contactors to allow CTs to fit and position them prior to anchoring wires to the enclosure.

Specification Pages

Please review product specifications to ensure that your circuit’s characteristics are supported by Pro 3EM.

Shelly Pro 3EM

https://kb.shelly.cloud/knowledge-base/shelly-pro-3em

https://kb.shelly.cloud/knowledge-base/shelly-pro-3em-400

Shelly Pro 3EM Switch Add-on
https://kb.shelly.cloud/knowledge-base/shelly-pro-3em-switch-add-on

Materials

1. Integra Enclosures, H12104HLL, qty 1

2. Integra Enclosures, DIN10, qty 1

3. Dinkle SS2N, qty 8

4. Dinkle DK10N-PE, qty 2

5. Dinkle DK10NC-PE, qty 2

6. Dinkle DK10N, qty 4 -

7. Dinkle DK10N-C, qty 2

8. Dinkle DK10N-BK, qty 8

9. Dinkle DK10N-RD, qty 6

10. Dinkle DSS10N-03P, qty 2

11. Dinkle DSS10N-02P, qty 4

12. Phoenix Contact 3200548, qty 16 (10 AWG Ferrule)

13. Phoenix Contact 3200580, qty 24 (14 AWG Ferrule)

14. Heyco Products M4848, qty 4 (1 inch strain relief)

Assembly

1. Drill and mount four 1-inch strain relief/cable glands.

2. Mount two 35mm din rails, 10 inches.

3. Mate two Pro 3EM meters with Pro 3EM Switch Add-on units prior to mounting.

4. On the top row, mount contactors, Pro 3EM meters, and Pro 3EM Switch Add-on modules, as pictured.

5. Mount SS2N spacer blocks on the top row, establishing 10mm of spacing between components and securing them in place.

6. Mount terminal blocks as pictured, with SS2N spacer blocks on the top row, securing terminal blocks in place.

7. Using DSS10N-02P, jumper two Dinkle DK10N terminal blocks, circuit 1

8. Using DSS10N-02P, jumper two Dinkle DK10N-RD terminal blocks, circuit 1

9. Using DSS10N-03P, jumper three Dinkle DK10N-BK terminal blocks, circuit 1

10. Using DSS10N-02P, jumper two Dinkle DK10N terminal blocks, circuit 2

11. Using DSS10N-02P, jumper two Dinkle DK10N-RD terminal blocks, circuit 2

12. Using DSS10N-03P, jumper three Dinkle DK10N terminal blocks, circuit 2

Connections

1. Identify the paired meter, contactor, and terminal blocks for circuits 1 and 2.

2. Bridge the two din rail bars using green jacketed wire connecting the two DK10NC-PE blocks.

3. Using a 14 AWG wire, connect the A2 terminal on the contactor for circuit 1 to neutral via one of the DK10N terminal blocks for circuit 1.

4. Connect the N terminal on the Shelly Pro 3EM for circuit 1 to the other DK10N terminal blocks for circuit 1.

5. Connect the R3 terminal on the contactor for circuit 1 to incoming phase B via one of the DK10N-RD terminal blocks for circuit 1.

6. Connect the A terminal on the Shelly Pro 3EM for circuit 1 to the other incoming phase B DK10N-RD terminal block for circuit 1.

7. Connect the R2 terminal on the contactor for circuit 1 to outgoing phase B via the DK10N-RD terminal block for circuit 1.

8. Connect the R1 terminal on the contactor for circuit 1 to incoming phase A via one of the DK10N-BK terminal blocks for circuit 1.

9. Connect the C terminal on the Shelly Pro 3EM for circuit 1 to the second incoming phase A DK10N-BK terminal blocks for circuit 1.

10. Connect the R4 terminal on the contactor for circuit 1 to outgoing phase A via the DK10N-BK terminal block for circuit 1.

11. Connect the I terminal on the Shelly Pro 3EM Switch Add-On for circuit 1 to the remaining incoming phase A DK10N-BK terminal blocks for circuit 1.

12. Connect the N terminal on the Shelly Pro 3EM for circuit 2 to the other DK10N terminal blocks for circuit 2.

13. Connect the R3 terminal on the contactor for circuit 2 to incoming phase B via one of the DK10N-RD terminal blocks for circuit 1.

14. Connect the A terminal on the Shelly Pro 3EM for circuit 2 to the other incoming phase B DK10N-RD terminal blocks for circuit 2.

15. Connect the R2 terminal on the contactor for circuit 2 to outgoing phase B via the DK10N-RD terminal block for circuit 2.

16. Connect the R1 terminal on the contactor for circuit 2 to incoming phase A via one of the DK10N-BK terminal blocks for circuit 2.

17. Connect the C terminal on the Shelly Pro 3EM for circuit 2 to the second incoming phase A DK10N-BK terminal blocks for circuit 2.

18. Connect the R4 terminal on the contactor for circuit 2 to outgoing phase A via the DK10N-BK terminal block for circuit 2. 

19. Connect the I terminal on the Shelly Pro 3EM Switch Add-On for circuit 2 to the remaining incoming phase A DK10N-BK terminal blocks for circuit 2.