GROWATT TPM-CT-E Three Phase Smart Meter
Overview
SDM630MCT-MA is a multi-function rail meter, it can accurately measure and display various power parameters in 1P2W/3P3W/3P4W: voltage, current, power, frequency, active power, reactive power, forward power, reverse power, total harmonics, etc. The meter is suitable for real-time power monitoring system, with multi-function, multi-purpose, high stability and long life characteristics. The meter is connected with an external current transformer and is suitable for various high and low voltage power grids. The meter has RS485 communication interface, supports the highest communication rate of 38400bps, can realize remote communication.
Technical Parameters
| General Specifications | |
| Rated voltage | 3×230/400Vac |
| Rated frequency | 50/60Hz |
| L-N voltage range | 100 ~ 289Vac |
| L-L voltage range | 173 ~ 480Vac |
| Auxiliary power voltage range | 85 ~ 275Vac or 120 ~ 380Vdc |
| AC withstand voltage | 4KV for 1min |
| Input current range | ＜40mA |
| Short-term overcurrent | 20*IMAX for 0.5s |
| Max. Reading | 9999999.9kWh/kVArh |
| Accuracy | |
| Active power | 0.5% of range maximum |
| Reactive power | 1% of range maximum |
| Environment | |
| Rated temperature | -25℃～+55℃ |
| Limit temperature | -40℃～+70℃ |
| Relative humidity(average annual) | ≤90％ |
| Installation category | CAT III |
| Degree of pollution | Conform to RoHS |
| Communication | |
| Communication | RS485 output for Modbus RTU |
| Baud rate | 9600bps(default) |
| Pulse | 3200imp/kWh |
| Mechanics | |
| Mounting dimensions | 94.5x72x65mm(LxWxH ) |
| Din rail dimensions | DIN rail 35mm |
| Protection level | IP51 (indoor) |
Unpacking
| Item | Quantity | Description |
| A | 1 | Three-phase meter |
| B | 1 | User Manual |
| C | 1 | RS485 cable (standard length 15m) |
| D | 3 | Current Transformer |
Dimension (Unit:mm)
Installation
Note:
We describe Growatt Grid-tied inverter as “PV inverter”and Growatt Hybrid/AC Coupled Inverter as “Hybrid Inverter”as below.
a. Voltage sampling and power supply wiring
Wiring of the L1 voltage sampling line: corresponding to meter Pin 4
Wiring of the L2 voltage sampling line: corresponding to meter Pin 3
Wiring of the L3 voltage sampling line: corresponding to meter Pin 2
Wiring of the N voltage sampling line: corresponding to meter Pin 1
Current transformer wiring
- The wiring should be executed according to the picture as shown on left. On the right side is the grid, current flows from K to L(grid to load).
- Wiring of the L1 CT: White Line corresponding to meter Pin 20, Black Line corresponding to meter Pin 19
- Wiring of the L2 CT: White Line corresponding to meter Pin 18, Black Line corresponding to meter Pin 17
- Wiring of the L3 CT: White Line corresponding to meter Pin 16, Black Line corresponding to meter Pin 15
RS485 wiring
Connect the Rs485 A to Pin 14 and Rs485 B to Pin 13 (There are corresponding line marks on the network cable in the attachment: 485A, 485B; If you use your own network cable, please choose 568B standard network cable, white orange cable is 485B and white blue cable is 485A)
When you are installing a PV Inverter, first cut off the RJ45 modular plug, then find two cables and crimp the accessory terminals, finally, put them into the correspond interface of the inverter’s 8 Pin signal connector as below.
The standard RS485 cable length is 15m. If need longer RS485 cable, please use an ethernet coupler to extend and make sure RS485 cable less than 100m (the recommended length is less than 25m).
There are four touch buttons on the panel, from top to bottom are “ESC(←)V/A”, “↑(Alt)MD/PH/HZ”, “↓(Shift)P”, “ENTER (→)E”. There are two types of key operation: long press(Press for more than two seconds) and short press(Pressing time is less than one second).
| NO. | Button | Features | Viewable content (short press) |
| 1 |  | Short press: display voltage and current, ← Long press: ESC | Phase voltage, Line voltage, Phase current, Neutral current, Voltage harmonics, Current harmonics |
| 2 |  | Short press: display power factor and frequency, ↑ Long press: Alt | Phase(Total) frequency, Total power factor, Phase(Total) maximum current demand |
| 3 |  | Short press: display power, ↓ Long press: Shift | Phase(Total) active power, Phase(Total) reactive power, Phase(Total) apparent power |
| 4 |  | Short press: display electric energy, → Long press: Enter | Total active electric energy, Total reactive electric energy, Forward active electric energy, Reverse active electric energy, Forward reactive electric energy, Reverse reactive electric energy |
Trouble Shooting
| Fault phenomenon | Reason analysis | Solution |
| Big deviation between electric energy measurement and actual value. | 1. Wiring error, voltage and current corresponding phase sequence is wrong. 2. If the output line of the current transformers is reversed. 3. The transformer ratio is not set, the meter displays the secondary data. | 1. Refer to the wiring diagram to check the wiring. 2. If the transformer ratio setting is wrong, please set the voltage ratio and current ratio correctly. 3. If the issue still exists,please contact your local supplier. |
| RS485 communication error (Inverter error 401) | 1. RS485 cable is open circuit,short circuit or resersely. 2. The address, baud rate and data parity of the meter do not match the SPH. | 1. If there is a problem with the communication cable, please replace the communication cable. 2. Set the correct address, baud rate, and data bit check digit of the meter by the button. 3. If the issue still exists,please contact your local supplier. |
The complete system wiring diagram is as follows, if the meter is not operating normally, you can refer to it to check the wiring.EPS port is only available in hybrid inverter.
Service and contact
Shenzhen Growatt New Energy Co., Ltd
4-13/F, Building A, Sino-German (Europe) Industrial Park, Hangcheng Ave, Bao’an District, Shenzhen, China
+86 0755 2747 1942
E service@ginverter.com
W www.ginverter.com
Download Manual
Documents / Resources
 | GROWATT TPM-CT-E Three Phase Smart Meter [pdf] User Guide TPM-CT-E, TPM-CT-E Three Phase Smart Meter, Three Phase Smart Meter, Smart Meter, Meter |