HUAWEI DTSU666-H Smart Power Sensor User Guide

: June 9, 2024
: Huawei

HUAWEI DTSU666-H Smart Power Sensor User Guide

Overview

Models

DTSU666-H: with three 100 A/40 mA CT
DTSU666-H 250 A/50 mA: with three 250 A/50 mA CT

Appearance

Differences between DTSU666-H and DTSU666-H 250 A/50 mA:

Parameters on the panel

DTSU666-H
Appearance

DTSU666-H 250 A/50 mA
Appearance

Nameplate

DTSU666-H
Appearance

DTSU666-H 250 A/50 mA
Appearance

Performance and Specification

Category	DTSU666-H	DTSU666-H 250 A/50 mA
Nominal voltage	230 V AC / 400 V AC	230 V AC / 400 V AC
Current Measurement range	0–100 A	0–250 A
Power grid system	3P4W	3P4W or 3P3W

Port Definition

Voltage Input: 3×230/400 V or 3×400 V
Current Transformer(CT): 100 A/40 mA or 250 A/50 mA;
Port Definition

Installing the DTSU666-H and DTSU666-H 250 A/50 mA

Install the smart power sensor on the standard din rail of DIN35mm
Install the Smart Power Sensor to the standard din rail from the top to the bottom, and then push the instrument to the din rail from the bottom to the front part.

Installing the Cable

Prepare cables

Cable| Port| Type| Conductor Cross-sectional Area Range| Outer Diameter| Source
---|---|---|---|---|---
AC power cable| Ua-3| Four-core outdoor copper cable| 4-6 mm2| 10-21 mm| Prepared by the customer
Ub-6
Uc-9
Un-10
CT cable| IA-13| /| /| /| Manufacturer
IA-14| /| /| /
IB-16| /| /| /
IB-17| /| /|
IC*-19| /| /| /
IC-21| /| /| /
Comm. cable| RS485A-24| S485B-25| Two-core outdoor shielded twisted pair| 0.25-1 mm2| 4-11 mm| Manufacturer

NOTE
A fuse and a thermistor are connected to each phase of Ua, Ub, and Uc inside the power meter to prevent damage caused by external short circuits. Ua, Ub, and Uc do not need to be protected by external fuses.
Prepare cables

Wiring Diagram–Three Phase Four Wire

Support model:

DTSU666-H
DTSU666-H 250 A/50 mA

Operating voltage: 0.7–1.3 Un

Three phase four wire: Connect the Ua, Ub, Uc, Un voltage lines to the 3, 6, 9 and 10 terminals of the collector. Connect current transformer outlets IA, IA, IB, IB, IC*, IC to terminals 13, 14, 16, 17, 19, 21 of the collector.
Connect RS485A and RS485B to the communication host.

NOTE
The CT direction must be consistent with the arrow direction as shown in the preceding figure.

Wiring Diagram–Three Phase Three Wire

Support model:

DTSU666-H 250 A/50 mA

Operating voltage: 0.7–1.3 Un

Three phase three wire: Connect the Ua, Uc, Ub voltage lines to the 3, 9 and 10 terminals of the collector. Connect current transformer outlets IA, IA, IB, IB, IC*, IC to terminals 13, 14, 16, 17, 19, 21 of the collector.
Connect RS485A and RS485B to the communication host.

NOTE
The CT direction must be consistent with the arrow direction as shown in the preceding figure

User Interface

Display (Auto loop)

If no button is pressed for 60 seconds, the backlight turns off. Auto loop Switch time = 5s.

No.

| Display interface| Description| No.| Display interface| Description
---|---|---|---|---|---
1| | Imp. activeenergy = 10000.0 kWh| 2| | Exp. active energy= 2345.67 kWh
3| | Active power= 3.291 kW| 4| | Phase A voltage= 220.0 V
5| | Phase B voltage= 220.1 V| 6| | Phase C voltage= 220.20 V
7| | Phase A current= 5.000 A| 8| | Phase B current= 5.001 A
9| | Phase C current= 5.002 A| 10| | Frequency freq = 50.00 Hz

Display (Change by key ” “)

No.| Display interface| Description| No.| Display interface| Description
---|---|---|---|---|---
1| | Comb. active energy= 7654.33 kWh| 2| | Imp. active energy= 10000.0 kWh
3| | Exp. active energy= 2345.67 kWh| 4| | None parity, 1 stop bit,Baud = 9600bps
5| | 001 represents address| 6| | Phase A voltage= 220.0 V
7| | Phase B voltage= 220.1 V| 8| | Phase C voltage= 220.20 V
9| | Phase A current= 5.000 A| 10| | Phase B current= 5.001 A
11| | Phase Ccurrent= 5.002 A| 12| | Phase activepower = 3.291 kW
13| | Phase A active power = 1.090kW| 14| | Phase B active power = 1.101kW
15| | Phase C active power= 1.100 kW| 16| | Power factor PFt = 0.500 L
17| | Phase A power factorPfa = 1.000 L| 18| | Phase B power factor PFb =0.500 L
19| | Phase C power factor PFc =0.500 C| 20| | Frequency freq= 50.00 Hz

Comb. active energy = Imp. active energy – Exp. active energy

Parameter

Parameter	Value range	Description
1: 645;	Settings for communication stop bit and Parity bits:
2: n.2;	1: Factory mode;
3: n.1;	2: None parity, 2 stop bits, n.2;
4: E.1;	3: None parity, 1 stop bit, n.1;
5: O.1;	4: Even parity, 1 stop bit, E.1;
5: Odd parity, 1 stop bit, O.1;
0: 4.800;1: 9.600;	Communication baud rate:0: 4800 bps;1: 9600 bps;
11–19	Communication address

(Optional) Parameter Setup

NOTE
Communications parameters have been configured for the power meter before delivery. If the communication is abnormal, check and set the parameters.

Button description: “SET” represents “confirm” or “cursor shift” (when entering digits), “ESC” represents “exit”, and “→” represents “add”. The password is 701 by default.
Parameter Setup

Troubleshooting

Fault phenomenon	Factor analysis	Elimination method
No display after the instrument being powered on

Incorrect wiring mode.
Abnormal voltage supplied for the instrument.

|

If the wiring mode is incorrect, please connect based on the correct wiring mode (see the
wiring diagram ).
If the supplied voltage is abnormal, please supply the voltage on the instrument specification.

Abnormal RS485 communication|

The RS485 communication cable is disconnected, short circuit or reversely connected.
The address, baud rate, data bit and parity bit of the instrument is not in accordance with the inverter.

|

If any problems for the communication cable, please change the cable.
Set the address, baud rate, data bit and parity bit of the instrument to be the same as the inverter through buttons and so as the “parameter setting”.

Power metering inaccuracy|

Wrong wiring, please check whether the corresponding phase sequence of voltage and current is correct.
Check whether the high and low ends of the current transformer inlet are reversely connected. Pa, Pb, and Pc are abnormal if the values are negative.

|

For wrong wiring, please connect based on the correct wiring mode (see the wiring diagram).
If a negative value is displayed, change the cable connection mode of the current transformer to ensure that the high and low ends are connected properly.

Verifying the Installation

Check that all mounting brackets are securely installed and all screws are tightened.
Check that all cables are reliably connected with correct polarity and no short circuit.