Zhejiang CHINT Instrument & Meter Co., Ltd. DTSU666 Series User Manual

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Page １／７
Quick operation manual of DTSU666-□series and DSSU666-□series
Digital Three-Phase Energy Meter
Thank you for using the products of Zhejiang CHINT Instrument & Meter Co., Ltd. In order to have a
safe and correct use of the instrument, please read this manual carefully and make sure to pay attention to
the following points in use:
 This instrument must be installed and maintained by the qualified professionals;
 The input signals and auxiliary power supply must be cut off before wiring of the instrument;
 Make sure every part of the instrument without voltage by continuously using appropriate
voltage detection device;
The following conditions will lead to the damage or abnormal operation of the device:
 Incorrect ratio setting of the instrument;
 Out of range of auxiliary power supply、voltage、current、frequency；
 Incorrect input polarity of current or voltage;
 The terminals are not connected according to the requirements;
1. Technical parameters
Table 1
Technical parameters Index
Input
signal
Measuring network
3 phase 3 wire(DSSU666□series)
3 phase 4 wire(DTSU666□series)
Voltage
Rated value
3 phase 3 wire AC 3×380V；AC 3×400V
3 phase 4 wire AC 3×220/380V；AC 3×230/400V
Operating
voltage
0.7Un—1.2Un
Consumption
≤8VA/1W(per phase)
Resistance
＞
500kΩ
Current
Rated value
3 phase 3 wire AC 5(80)A
3 phase 4 wire AC 1.5(6)A
Consumption ≤1VA(per phase)
Resistance
＜
20mΩ(per phase)
Frequency Input range 45Hz
～
65Hz
Output
Display
LCD display
DSSU666□and
DTSU666□series
Active energy Class1 resolving power 0.01kWh
Reactive energy Class 2 resolving power 0.01kvarh
Active energy
Class 0.5S
resolving power 0.01kWh
Reactive energy Class 2 resolving power 0.01kvarh
Energy
Energy
measurement
forward
、
reverse active energy,
four-quadrant reactive energy.
Pulse constant
AC 3×380V；
AC 3×400V
AC
1.5(6)A
6400imp/kWh(imp/kvarh)
AC 3×380V
；
AC 3×400V
AC
5(80)A
400imp/kWh(imp/kvarh)
AC 3×220/380V；
AC 3×230/400V
AC
1.5(6)A
6400imp/kWh(imp/kvarh)

Zhejiang CHINT Instrument & Meter Co., Ltd. DTSU666 Series Specifications

General

Brand	Zhejiang CHINT Instrument & Meter Co., Ltd.
Model	DTSU666 Series
Category	Measuring Instruments
Language	English

Summary

Technical Parameters

Input Signal Specifications

Covers measuring network type, voltage, current, frequency range, and display type.

Output Energy Measurement

Details active/reactive energy classes, resolving power, energy measurement types, and pulse constants.

Wiring Instructions

Wiring Diagrams and Connections

Illustrates connection terminals for DTSU666/DSSU666 series and details signal wire assignments.

Programming Parameters

Parameter Setting Guide

Guides on setting system parameters, transformer ratios, and communication settings via the interface.

Installation and Size

Physical Dimensions and Mounting

Provides shell size (width, length, depth) and DIN rail mounting details for the meter.

Communication Interface

Communication Protocols and Settings

Details supported communication protocols (DLT 645, ModBus_RTU) and factory settings.

Data Registers and Conversion

Lists data registers, parameter addresses, and conversion formulas for electrical quantities.