TPM-CT-E-EU - Uncategorized Growatt - Free user manual and instructions

Product Type	Three-phase DIN rail energy meter (SDM630MCT V2)
Dimensions (L x W x H)	94.5 x 72 x 65 mm
Weight	Approximately 0.3 kg
Rated Voltage	3 x 230/400 VAC (L-N/L-L)
Frequency	50/60 Hz
Auxiliary Power Supply	85-275 VAC or 120-380 VDC
Input Current Range	1A or 5A (via external CT)
Accuracy (Active/Reactive Power)	0.5% of range maximum
Communication Interface	RS485 Modbus RTU (max 38400 bps, default 9600)
Measured Parameters	Voltage, current, power, energy, frequency, harmonics, power factor, demand
Display Type	Touch-sensitive buttons (ESC, UP, DOWN, ENTER)
Protection Level	IP51 (indoor)
Installation Category	CAT III
Mounting	DIN rail 35 mm
Included Accessories	3x current transformers (CT), 15m RS485 cable, quick guide
CT Ratios Supported	250/5A, 600/5A, 1200/5A
Operating Temperature	-25°C to +55°C (regulated), -40°C to +70°C (limited)
Humidity	≤90% annual average
Maintenance	Keep dry, clean with dry cloth; disconnect power before cleaning
Safety	Disconnect all power before installation; secure wiring; use proper CT orientation
Spare Parts Availability	CTs, RS485 cable (up to 100m), connectors
Reparability	Contact local supplier; no user-serviceable parts inside

Frequently Asked Questions - TPM-CT-E-EU Growatt

What is the default communication address of the meter?

The default communication address is 02 for Modbus RTU. It can be changed via the settings menu.

How do I set the current transformer (CT) ratio?

Long press E to enter settings, enter password 1000, navigate to SET CT2 S, then use M and P buttons to adjust the ratio (e.g., 250/5A, 600/5A, 1200/5A). Long press E to confirm.

How to wire the meter for a 3-phase 4-wire system (3P4W)?

Connect L1 voltage to Pin 4, L2 to Pin 3, L3 to Pin 2, and N to Pin 1. Current transformers: L1 CT S1 to Pin 16, S2 to Pin 15; L2 CT S1 to Pin 18, S2 to Pin 17; L3 CT S1 to Pin 20, S2 to Pin 19.

The inverter shows error 401 (RS485 communication error). What should I check?

Check that the RS485 cable is correctly connected (485A to Pin 14, 485B to Pin 13), not reversed, and not damaged. Verify the meter's address and baud rate match the inverter settings (default: address 02, baud 9600).

Can the meter measure harmonics?

Yes, it measures voltage harmonics and current harmonics displayed by short pressing the ESC button.

How do I change the grid system type from 3P3W to 3P4W?

Long press E to enter settings, enter password 1000, navigate to SY5 3P4 using M and P, then long press E to confirm. Options include 3P4W, 3P3W, and 1P2W.

What is the maximum length of the RS485 cable?

The standard cable length is 15m, but a longer cable up to 100m can be used (recommended less than 25m for reliability).

How to read total active energy?

Short press the ENTER (→) button to cycle through energy values. Total active electric energy is displayed first.

What does the meter display when power is first applied?

It enters measure display mode showing real-time parameters such as voltage, current, power, etc., depending on the previous button selection.

How to reset the meter to factory defaults?

There is no dedicated reset function. To restore defaults, manually set parameters (address, CT ratio, baud rate, grid type) to their default values via the settings menu.

USER MANUAL TPM-CT-E-EU Growatt

SDM630MCT V2 is a multi-functional din-rail meter designed for accurate measurement and display of parameters in 3P3W/3P4W power grid systems, such as voltage, current, power, frequency, active power, reactive power, positive energy, reverse energy, total harmonics, etc. It is an ideal choice for real-time power monitoring, featuring a wide range of functions and applications with high stability over extended service life. The meter works with an external current transformer and can be applied in both high and low voltage power grid. It comes with an RS485 communication interface, which supports a maximum baud rate of 38400 bps and enables remote communication.

1. Technical Parameters

General Specifications
Rated voltage	3×230/400Vac
Rated frequency	50/60Hz
L-N voltage range	100 ~ 276Vac
L-L voltage range	173 ~ 480Vac
Auxiliary power voltage range	85 ~ 275Vac or 120 ~ 380Vdc
AC withstand voltage	4KV for 1min
Input current range	1A or 5A
Short-term overcurrent	20*IMAX for 0.5s
Max. Reading	9999999.9kWh/kVArh
Accuracy
Active power	0.5% of range maximum
Reactive power	0.5% of range maximum
Environment
Regulated working temperature range	-25°C~+55°C
Limited working temperature range	-40°C~+70°C
Relative humidity annual average	≤90%
Installation category	CAT III
Degree of pollution	RoHS compliant
Communication
Communication	RS485 output for Modbus RTU
Baud rate	9600bps(default)
Pulse	3200imp/kWh
Mechanics
Outline dimensions	94.5x72x65mm(LxWxH )
Din rail dimensions	DIN rail 35mm
Protection level	IP51 (indoor)

1. Unpacking
   

Item	Quantity	Description
A	1	Three-phase meter
B	1	Quick Installation Guide
C	1	RS485 cable (standard length: 15m)
D	3	Current Transformer

1. Dimensions (Unit: mm)
   

5. Installation

Note:

1. The Growatt Storage Inverter and the Hybrid Inverter are hereinafter referred to as "the Storage/Hybrid Inverter".
2. The grid is on the right side and the current flows from P1 to P2 (from the grid to the load).
3. The Growatt Storage Inverter and the Hybrid Inverter are hereinafter referred to as "the Storage/Hybrid Inverter".
4. The grid is on the right side and the current flows from P1 to P2 (from the grid to the load).

graph TD
    A["Storage/Hybrid Inverter"] -->|RS485-A| B["RS485-B"]
    B --> C["Current inputs"]
    C --> D["PE"]
    D --> E["P2"]
    E --> F["P1"]
    G["Grid"] --> H["L1"]
    G --> I["L2"]
    G --> J["L3"]
    G --> K["N"]
    L["Voltage inputs"] --> M["3P3W"]
    N["L"] --> O["6"]
    P["N"] --> Q["7"]
    R["1"] --> S["2"]
    T["2"] --> U["3"]
    V["4"] --> W["5"]
    X["6"] --> Y["7"]
    Z["8"] --> AA["9"]

graph TD
    A["Storage/Hybrid Inverter"] -->|RS485-B| B["Current Inputs"]
    A -->|RS485-A| C["Current Inputs"]
    B --> D["PE"]
    C --> D
    D --> E["L1 Grid"]
    D --> F["L2 Grid"]
    D --> G["L3 Grid"]
    H["Voltage inputs"] --> I["3P4W"]
    J["N"] --> I
    K["S1 S2 S3"] --> I
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#cfc,stroke:#333
    style E fill:#fcc,stroke:#333
    style F fill:#fcc,stroke:#333
    style G fill:#fcc,stroke:#333
    style H fill:#fff,stroke:#333
    style I fill:#fff,stroke:#333

A. Voltage sampling and power supply wiring3P3W: Wiring of the L1 voltage sampling line: corresponding to meter Pin 4 Wiring of the L2 voltage sampling line: corresponding to meter Pin 1 Wiring of the L3 voltage sampling line: corresponding to meter Pin 2	3P4W: 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
B. Current transformer wiringPlease refer to the diagram above. The grid is on the right and the current flows from K to T (from the grid to the load). Wiring of the L1 CT: S1 Line corresponding to meter Pin 16, S2 Line corresponding to meter Pin 15 Wiring of the L3 CT: S1 Line corresponding to meter Pin 20, S2 Line corresponding to meter Pin 19	Wiring of the L1 CT: S1 Line corresponding to meter Pin 16, S2 Line corresponding to meter Pin 15 Wiring of the L2 CT: S1 Line corresponding to meter Pin 18, S2 Line corresponding to meter Pin 17 Wiring of the L3 CT: S1 Line corresponding to meter Pin 20, S2 Line corresponding to meter Pin 19
C.RS485 cable wiringConnect the RS485A to Pin 14 and RS485B to Pin 13 (The network cables delivered with the inverter are labeled as 485-A and 485-B; if you are using the cables purchased yourself, make sure to differentiate between 485-A and 485-B.)
D. Connecting the meter to the Growatt Three-phaseStorage/Hybrid Inverter	E. When connecting the smart meter to the inverter, connect one end of the cable to Terminal 13 (485B) and Terminal 14 (485A) of the smart meter and the other end to Pin 6 (485A) and Pin 7 (485B) of the COM1 port.Note: In most cases, the red cable is used for 485A and the black cable for 485B.
F. Dismantle the 16-pin connector delivered with the inverter and set aside the water-proof plug. Route the cables through each part sequentially, then connect them to Pin 6 and Pin 7. Finally, connect the connector to the COM1 port of the inverter.	G. The standard RS485 cable length is 15m. If a longer RS485 cable is required, please use an intact cable and make sure the RS485 cable is less than 100m (the recommended length is less than 25m).

6. Button Description and Display

There are four touch buttons on the panel, arranged from top to bottom as follows: “ESC(←)V/A”, “↑(Alt)MD/PH/HZ”, “↓(Shift)P”, “ENTER(→)E”. These buttons can be operated in two ways: long press (pressing for more than two seconds) and short press (pressing for 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, Positive active electric energy, Reverse active electric energy, Positive reactive electric energy, Reverse reactive electric energy

The default communication address for the meter and the Growatt Three-phase Storage/Hybrid Inverter is 02, the default baud rate is 9600 and the current ratios are 250A/5A, 600A/5A, 1200A/5A, which are determined by the CT that is connected. If the communication between the meter and the inverter is not established, please check if the communication address and the baud rate are correctly set.

Long press E ▶ to access the settings menu (the password is 1000 by default, then use M ▲ and P ▼ to navigate to the desired page. If the page flashes, it indicates that you can configure the parameter using the M ▲ and P ▼ buttons; if not, press E ▶ to

enter the selection routine. Then long press

onfirm your setting and press

graph TD
    A["Power on"] --> B["Measure display"]
    B --> C{Long Press}
    C --> D["PASS 0000"]
    D --> E{Short Press}
    E --> F{PASS 1000}
    F --> G["SET Addr 001"]
    G --> H{Short Press}
    H --> I["SET CT2 S"]
    I --> J{To adjust the value}
    J --> K["Press M and P to confirm the settings"]
    K --> L["Then Long Press"]
    L --> M["The value can be adjusted to 250, 600 or 1200 according to the CT range"]
    M --> N["When the transformation ratio is set to 100 and the secondary current is 5A, the primary current would be 5Ax100=500A"]
    N --> O["Short Press U/I ISC"]

Note: The meter can be connected to the Growatt Three-phase Storage/Hybrid Inverter in two ways and can be set as 3P3W or 3P4W before operating.

graph TD
    A["Power on"] --> B["Measure display"]
    B --> C["Long Press"]
    C --> D["PASS 0000"]
    D --> E["Short Press"]
    E --> F["PASS 1000"]
    F --> G["Default password is 1000"]
    G --> H["SET Addr 001"]
    H --> I["Short Press"]
    I --> J["The current page displays 3P3W"]
    J --> K["Press M and P to adjust the value"]
    K --> L["Then Long Press to confirm the settings"]
    L --> M["It can be 3P4W, 3P3W, or 1P2W"]
    M --> N["Short Press U/I SSC"]
    N --> B

1. Troubleshooting

Fault phenomenon	Reason analysis	Solution
Metering inaccuracy	1. Wiring error, check whether the corresponding phase sequence of voltage and current is correct.2. Check if the output line of the current transformer is reversely connected.3. The transformer ratio is not set, and 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. The RS485 communication cable is disconnected, short circuit or reversely connected.2. The address, baud rate, data bit and parity bit of the meter are not in accordance with the inverter .	1. If there is a problem with the communication cable, please replace the communication cable.2. Set the address, baud rate, data bit and parity bit of the meter through buttons.3. If the issue still exists, please contact your local supplier.

The complete system wiring diagram is shown as follows. In case that the meter is not operating normally, you can refer to it to check the wiring. Connect the meter to the RS485 port of the inverter. The following takes the WIT as an example.

graph TD
    A["Primary load"] --> B["Load Breaker"]
    B --> C["Load-T"]
    B --> D["Load-S"]
    B --> E["Load-R"]
    C --> F["EARTH"]
    D --> G["Load-PE"]
    E --> H["Load-PE"]
    F --> I["GRID"]
    G --> J["GRID-PE"]
    H --> K["GRID"]
    L["Storage/Hybrid Inverter"] --> M["COM1"]
    M --> N["AC Breaker"]
    N --> O["Secondary load"]
    O --> P["P1:Grid side"]
    P --> Q["P2:PCS side"]
    Q --> R["S1 S2"]
    R --> S["S1 S2"]
    S --> T["RS485-B"]
    T --> U["METER RS485-A"]
    U --> V["N line needs to be connected to N line of the power grid"]
    V --> W["Main Breaker"]
    W --> X["Grid-R"]
    W --> Y["Grid-S"]
    W --> Z["Grid-T"]
    X --> AA["Power cable"]
    Y --> AB["sample cable"]
    Z --> AC["communication cable"]

graph TD
    A["Primary load"] --> B["Load Breaker"]
    B --> C["Load-N"]
    B --> D["Load-T"]
    B --> E["Load-S"]
    B --> F["Load-R"]
    C --> G["EARTH"]
    D --> H["Load-PE"]
    E --> I["Load-PE"]
    F --> J["Load-PE"]
    G --> K["GRID"]
    H --> L["GRID"]
    I --> M["GRID"]
    K --> N["COM1"]
    L --> O["GRID-N"]
    M --> P["GRID-T"]
    N --> Q["Grid-S"]
    O --> R["Grid-R"]
    P --> S["Secondary load"]
    Q --> T["Secondary load"]
    R --> U["AC Breaker"]
    S --> V["P1:Grid side"]
    T --> W["P2:PCS side"]
    U --> X["S1 S2"]
    V --> Y["S1 S2"]
    W --> Z["S1 S2"]
    X --> AA["S0 RS485-B ETE"]
    Y --> AB["S0 RS485-B ETE"]
    Z --> AC["S0 RS485-B ETE"]

8. 56 Communication module installation Service and contact

Shenzhen Growatt New Energy Co., Ltd.

4-13/F, Building A, Sino-German (Europe) Industrial Park, Hangcheng Blvd, Bao'an District, Shenzhen, China

T [phone]

E [e-mail]

W www.ginverter.com

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Growatt New Energy