CHNTDDSU666 - Uncategorized Deye - Free user manual and instructions

Product Type	Three-phase electronic energy meter (DIN-rail)
Models	DTSU666 (three-phase four-wire), DSSU666 (three-phase three-wire)
Dimensions	100 × 72 × 65 mm (4 modules)
Mounting	DIN35 mm rail
Voltage (rated)	3×230/400 V (DTSU666) or 3×400 V (DSSU666)
Current (direct)	5(80) A
Current (transformer)	1.5(6) A
Accuracy class (active)	Class 0.5S (1.5(6)A) or Class 1 (5(80)A)
Accuracy class (reactive)	Class 2
Impulse constant	6400 imp/kWh (1.5(6)A) or 400 imp/kWh (5(80)A)
Power consumption (voltage)	≤1.5 W and 6 VA
Power consumption (current)	≤0.2 VA (Ib<10A) or ≤0.4 VA (Ib≥10A)
Communication	RS485, protocols DL/T645-2007 or ModBus-RTU
Display	LCD, 7-digit energy display, backlit
Working temperature	-10°C to +45°C (extended -25°C to +75°C)
Relative humidity	≤75% (annual average)
Data retention	≥10 years after power interruption
Warranty	18 months from delivery

Frequently Asked Questions - CHNTDDSU666 Deye

What is the difference between DTSU666 and DSSU666?

The DTSU666 is a three-phase four-wire meter (voltage 3×230/400 V), while the DSSU666 is a three-phase three-wire meter (voltage 3×400 V). Both share similar dimensions and mounting.

Can this meter be used with current transformers?

Yes, the 1.5(6)A version is designed for connection through current transformers. The 5(80)A version is for direct connection. Set the current transformer ratio (Ct) in the programming menu.

How do I set the communication parameters?

Press the SET button to enter programming, input the code (default 701), then navigate to the desired parameter (e.g., bAud for baud rate, Addr for address). Use the arrow buttons to change values. Refer to the manual for full details.

What communication protocols are supported?

The meter supports both DL/T645-2007 and ModBus-RTU protocols. Factory default is DL/T645-2007. Protocol can be changed via the Prot parameter.

Why is there no display when powered?

Check wiring: ensure correct voltage connection (L1, L2, L3, N) and that the voltage is within range. If wiring is correct, contact supplier.

How to interpret the display symbols?

The LCD shows energy values (e.g., combined active energy), voltage, current, power, and communication address. Symbols like 'Imp' indicate import energy, 'Exp' export. Refer to the display interface table in the manual.

What is the maximum cable size for current terminals?

For current terminals, the conductor cross-sectional area should be ≤16 mm². For RS485 terminals, use 0.25-1 mm² wire.

How do I clear the energy data?

In programming, set the CLrE parameter to 1 to clear all energy data (this cannot be undone). After clearing, the value resets to zero.

What is the recommended storage environment?

Store in a dry, ventilated place, temperature -40°C to +70°C, relative humidity ≤85%. Avoid corrosive gases.

Does the meter have a warranty?

Yes, the manufacturer provides free repair or replacement within 18 months of delivery, provided the user follows the instructions and the seal remains intact.

USER MANUAL CHNTDDSU666 Deye

DTSU666 series three phase four wire electronic energy meter (Din-rail) DSSU666 series three phase three wire electronic energy meter (Din-rail)

Manual

ZTY0.464.1002

Zhejiang Chint Instrument & Meter Co., Ltd. June, 2019

Catalog

1. Brief Introduction .... 1
2. Working Principle.... 2
3. Main Technical Performance & Parameters.... 3
4. Main function....6
5. Outline and installation size.... 12
6. Installation and operation manual.... 13
7. Diagnosis, analysis and elimination for common faults.... 16
8. Transportation & Storage.... 17
9. Maintenance & Service.... 17

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 1, Total 18

1. Brief Introduction

1.1. Main application & applicable range

DTSU666 series three phase four wire and DSSU666 series three phase three wire electronic energy meter (din-rail) (hereinafter referred to as the “instrument”) is designed based on power monitoring and energy metering demands for electric power system, communication industry, construction industry, etc. as a new generation of intelligent instrument combining measurement and communication function, mainly applied into the measurement and display for the electric parameters in the electric circuit including three voltage, three current, active power, reactive power, frequency, positive& negative energy, four-quadrant energy, etc. Adopting the standard DIN35mm din rail mounting and modular design, it is characterized with small volume, easy installation and easy networking, widely applied into the internal energy monitoring and assessment for industrial and mining enterprises, hotels, schools, large public buildings.

Complied standards:

IEC 61010-1:2010《Safety requirements for electrical equipment for measurement, control and laboratory use Part1:General requirements》

IEC 61326-1:2013 《Electrical equipment for measurement, control and laboratory use –EMC requirements Part1:General requirements》

1.2. Product Features

1) Characterized with positive and reverse active power, combined active power, combined reactive power, four quadrant reactive power metering and storage function with combination mode character can be set.

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 2, Total 18

2) RS485 communication interface, easy to exchange data with outside;
3) Adopting the standard DIN35mm din rail mounting and modular design, it is characterized with small volume, easy installation and easy networking.

1.3. Product Model

Table 1 product model and specification

Model	voltage (V)	Current (A)	Impulse constant		Accuracy class
			imp/kWh	imp/kvarh
DTSU666	3×230/400	1.5(6)A	6400	6400	Active Class 0.5S, Reactive Class 2
		5(80)A	400	400	Active Class 1, Reactive Class 2
DSSU666	3×400	1.5(6)A	6400	6400	Active Class 0.5S, Reactive Class 2
		5(80)A	400	400	Active Class 1, Reactive Class 2

Note: 1.5(6)A is Connection through current transformers, 5(80)A is direct access.

1.4. Temperature range

Regulated working temperature range: -10^ +45^ ;

Limited working temperature range: -25^ +75^ ;

Relative humidity(Annually average):≤75%;

Atmospheric pressure: 63.0kPa\~106.0kPa( altitude 4km and below), excepting the requirements for special orders.

2. Working Principle

2.1. Working Principle

The instrument are composed of high accurately integrated circuit specially for measurement (ASIC) and managing MCU, memory chip, RS485 communication module, etc.

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 3, Total 18

graph TD
    A["current sampling"] --> B["I"]
    C["voltage sampling"] --> D["U"]
    B --> E["metering"]
    D --> E
    E --> F["MCU"]
    F --> G["LCD display"]
    F --> H["memory"]
    F --> I["keystroke"]
    F --> J["RS485 communication interface"]
    D --> K["Uo"]
    D --> L["Ub"]
    D --> M["Uc"]
    K --> N["real-time clock"]
    L --> N
    M --> O["impulse output"]
    N --> P["relay"]
    O --> P
    P --> Q["power management"]
    Q --> R["power supply"]
    R --> D

Figure 1 Working principle block diagram Figure 1

2.2. Principle for the main function module

The special metering integrated circuit (ASIC) integrated six load two order - type of A/D conversion, please take the digital signal processing measured by the voltage circuit as well as all the power, energy, effective values, power factor and frequency. This metering chip can measure the active power, reactive power, apparent power, active energy, reactive power, apparent energy of each phase and combined phase, and at the same time measuring current, voltage effective values, power factor, phase angle, frequency and other parameters, entirely satisfying the needs of power meter. The chip provides an SPI interface, convenient for metering parameters as well as parameter calibration between the management MCU.

3. Main Technical Performance & Parameters

3.1. limit of error caused by the current augment

Table 2 The limit value of the active percentage error of meters on balanced load

Meters for	Value of current	Power factor	Percentage error limitsfor meters of class
			0.5S	Class 1	Class 2
Connection throughcurrent transformers	0.01I_n ≤ I < 0.05I_n	1	±1.0	±1.5	±2.0
	0.05I_n ≤ I ≤ I_max	1	±0.5	±1.0	±1.2
	0.02I_n ≤ I < 0.1I_n	0.5L、0.8C	±1.0	±1.5	±2.0
	0.1I_n ≤ I ≤ I_max	0.5L、0.8C	±1.0	±1.0	±1.2

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 4, Total 18

Direct connection	0.05I_b ≤ I < 0.1I_b	1	-	±1.5	±2.0
	0.1I_b ≤ I ≤ I_max	1	-	±1.0	±1.2
	0.01I_b ≤ I < 0.2I_b	0.5L、0.8C	-	±1.5	±2.0
	0.2I_b ≤ I ≤ I_max	0.5L、0.8C	-	±1.0	±1.2
Note	In: secondary rated current of the current transformer; Ib: calibrated current of the meter;L:inductive; C: capacitive;

Table 3 The limit value of the reactive percentage error of meters on balanced load

Value of current		(inductive or capacitive)	Percentage error limits for meters of class
Direct connection	Connection through current transformers		Class 2
0.05I_b ≤ I < 0.1I_b	0.02I_n ≤ I < 0.05I_n	1	±2.5
0.1I_b ≤ I ≤ I_max	0.05I_n ≤ I ≤ I_max	1	±2.0
0.1I_b ≤ I < 0.2I_b	0.05I_n ≤ I < 0.1I_n	0.5	±2.5
0.2I_b ≤ I ≤ I_max	0.1I_n ≤ I ≤ I_max	0.5	±2.0
0.2I_b ≤ I ≤ I_max	0.1I_n ≤ I ≤ I_max	0.25	±2.5

Table 4 The limit value of the reactive percentage error of meters on balanced load

Value of current		Power factor	Percentage error limits for meters of class
Direct connection	Connection through		0.5S	Class 1	Class 2
0.1 I_b ≤ I ≤ I_max	0.05I_n ≤ I ≤ I_max	1	±0.6	±2.0	±3.0
0.2I_b ≤ I ≤ I_max	0.1I_n ≤ I ≤ I_max	0.5L	±1.0	±2.0	±3.0

Table 5 The limit value of the reactive percentage error of meters on imbalanced load

Value of current		Power factor	Percentage error limits for meters of class
Direct connection	Direct connection		Class 2
0.1 I_b ≤ I ≤ I_max	0.05I_n ≤ I ≤ I_max	1	±3.0
0.2I_b ≤ I ≤ I_max	0.1I_n ≤ I ≤ I_max	0.5	±3.0

3.2. Starting and no-load condition

3.2.1. Starting

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 5, Total 18

Under the power factor of 1.0 and started current, the instrument can be started and continuously measure (for multiple phase instrument, it will bring balanced load). If the instrument is designed based on measurement for dual directional energy, then it is applicable for each direction of energy.

Table 6 start current

Meters for	Class of meter			Power factor
	0.5S	1	2
Direct connection	-	0.004I_b	0.005I_b	1
Connection through current transformers	0.001I_b	0.002I_b	0.003I_b	1

3.2.2. Test of no-load condition

When the voltage is applied with no current flowing in the current circuit, the test output of the meter shall not produce more than one pulse.

For this test, the current circuit shall be open-circuit and a voltage of 115 % of the reference voltage shall be applied to the voltage circuits.

The minimum test period t shall be

$$ \Delta t [ \min ] \frac {6 0 0 1 0 ^ {- 6}}{k m U I \cdot \quad \cdot_ {n} \quad \max} \quad \text { for meters of class 0.5S or 1 } $$

$$ \Delta t [ \min ] \frac {4 8 0 1 0 ^ {6}}{k \cdot m \cdot U _ {n} \cdot I _ {\max}} \quad \text { for meters of class 2 } $$

k is the number of pulses emitted by the output device of the meter per kilovarhour(imp/kvar·h); m is the number of measuring elements;

Un is the reference voltage in volts;

Imax is the maximum current in amperes.

3.3. Electrical parameters

Table 7 Electrical parameters

Regulated operating voltage range	0.9Un~1.1Un
Extended operating voltage range	0.8Un~1.15Un
Power consumption of voltage	≤1.5W 和 6VA
Power consumption of current	Ib<10A	≤0.2VA
	Ib≥10A	≤0.4VA
Data storage time after power interruption	≥10 years

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 6, Total 18

4. Main function

4.1. Displayed function

From the displayed interface, the electrical parameter and energy data are all primary side data (that is, the multiplied by current and voltage ratios). The energy measuring value will be displayed seven bits, with the displaying range from 0.00kWh to 9999999MWh.

Figure 2 display

Table 8 Display interface

No.	Display interface	Instruction	No.	Display interface	Instruction
1		Combined active energy =10000.00kWh	11		Phase B current =5.001A
2		Positive active energy =10000.00kWh	12		Phase C current =5.002A
3		Reserve active energy =2345.67kWh	13		Combined phase active power =3.291kW
4		Protocol: DT/L645-2007 address = 000000000001	14		Phase A active power =1.090kW
5			15		Phase B active power =1.101kW

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 7, Total 18

NOTE: Combined active energy = Positive active energy - Reserve active energy。

4.2. Programming function

4.2.1. Programming function

Table 9 Programming Parameter

Parameter	Value range	Description
Ct	1~9999	Current ratio, used for setting the input loop current ratio:When the current is connected to the line via the transformer, Ct=the rated current of the primary loop / the rated current of the secondary circuit;When the current is directly connected to the line, Ct shall be set as 1.
Pt	0.1~999.9	Voltage ratio, used for setting the voltage ratio of the input loop;When the voltage is connected to the line via the transformer, Pt= the rated voltage of the primary loop / the rated voltage of the secondary circuit;When the voltage is directly connected to the line, Pt shall be set as 1.0.
Prot	1: 645;	Settings for communication stop bit and Parity bits:

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 8, Total 18

	2: n.2;3: n.1;4: E.1;5: O.1;	1: Factory mode;2: None parity, 2 stop bits, n.2;3: None parity, 1 stop bit, n.1;4: Even parity, 1 stop bit, E.1;5: Odd parity, 1 stop bit, O.1;
bRud	0: 1.200;1: 2.400;2: 4.800;3: 9.600;	Communication baud rate:0: 1.200 bps;1: 2.400 bps;2: 4.800 bps;3: 9.600 bps;
Addr	1~247	Communication address
nEt	0: n.34;1: n.33;	Option for wiring mode:0: n.34 represents three phase four wire;1: n.33 represents three phase three wire.
CLrE	0:no; 1:E	The setting is 1, representing the allowed instrument energy data clearance, which will be zero reset after clearing.
Plus	0:P; 1:Q;2:S;	Pulse output:0: active energy pulse; 1: reactive energy pulse; 2: Others.
dISP	0~30	Display in turns(second)0: Timely display; 1~30: Time interval of actual display.
bLcd	0~30	Backlight lighting time control (minutes)0: Normally light; 1~30: backlight lighting time without button operation

4.2.2. Programming operation

Button description: “SET” button represents “confirmation”, or “cursor shift” (when input digits), “ESC” button represents “exit”, “→” (“”) button represents “add”. The input code is (default 701).

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 9, Total 18

graph TD
    A["Power on"] --> B["Measure display"]
    B --> C["Code"]
    C --> D["60_"]
    D --> E["Shift"]
    E --> F["Character interface"]
    F --> G["70_"]
    G --> H["Password correct, enter into the setting interface"]
    H --> I["3.0"]
    I --> J["_.0"]
    J --> K["1.0"]
    K --> L["PT"]
    L --> M["twice ESC"]
    M --> N["9"]
    N --> O["twice ESC"]
    O --> P["60_"]
    P --> Q["Shift"]
    Q --> R["Character interface"]
    R --> S["twice SET"]
    S --> T["70_"]
    T --> U["Password correct, enter into the setting interface"]
    U --> V["twice ESC"]
    V --> W["3.0"]
    W --> X["_.0"]
    X --> Y["1.0"]
    Y --> Z["PT"]
    Z --> AA["twice SET"]
    AA --> AB["60_"]
    AB --> AC["Shift"]
    AC --> AD["Character interface"]
    AD --> AE["twice SET"]
    AE --> AF["70_"]
    AF --> AG["Password correct, enter into the setting interface"]
    AG --> AH["twice ESC"]
    AH --> AI["3.0"]
    AI --> AJ["_.0"]
    AJ --> AK["1.0"]
    AK --> AL["PT"]

Figure 3 Setting examples for current and potential transformer ratio

graph TD
    A["Power on"] --> B["Measure display"]
    B --> C["Code"]
    C --> D["60_"]
    D --> E["Add"]
    E --> F["6_1"]
    F --> G["Shift"]
    G --> H["0_1"]
    H --> I["Add"]
    I --> J["Communication address modify"]
    J --> K["9"]
    K --> L["Address"]
    L --> M["3t"]
    M --> N["70_1"]
    N --> O["Password correct, enter into the setting interface"]
    O --> P["Baud rate"]
    P --> Q["4.800"]
    Q --> R["Three"]
    R --> S["9.600"]
    S --> T["Baud rate"]
    T --> U["9.600"]
    U --> V["Three"]
    V --> W["once SET"]
    W --> X["Baud rate"]
    X --> Y["Esc"]
    Y --> Z["Esc"]
    Z --> AA["Esc"]
    AA --> AB["Esc"]
    AB --> AC["Esc"]
    AC --> AD["Esc"]
    AD --> AE["Esc"]
    AE --> AF["Esc"]
    AF --> AG["Esc"]
    AG --> AH["Esc"]
    AH --> AI["Esc"]
    AI --> AJ["Esc"]
    AJ --> AK["Esc"]
    AK --> AL["Esc"]
    AL --> AM["Esc"]
    AM --> AN["Esc"]
    AN --> AO["Esc"]
    AO --> AP["Esc"]
    AP --> AQ["Esc"]
    AQ --> AR["Esc"]
    AR --> AS["Esc"]
    AS --> AT["Esc"]
    AT --> AU["Esc"]
    AU --> AV["Esc"]
    AV --> AW["Esc"]
    AW --> AX["Esc"]
    AX --> AY["Esc"]
    AY --> AZ["Esc"]
    AZ --> BA["Esc"]
    BA --> BB["Esc"]
    BB --> BC["Esc"]
    BC --> BD["Esc"]
    BD --> BE["Esc"]
    BE --> BF["Esc"]
    BF --> BG["Esc"]
    BG --> BH["Esc"]
    BH --> BI["Esc"]
    BI --> BJ["Esc"]
    BJ --> BK["Esc"]
    BK --> BL["Esc"]
    BL --> BM["Esc"]
    BM --> BN["Esc"]
    BN --> BO["Esc"]
    BO --> BP["Esc"]
    BP --> BQ["Esc"]
    BQ --> BR["Esc"]
    BR --> BS["Esc"]
    BS --> BT["Esc"]
    BT --> BU["Esc"]
    BU --> BV["Esc"]
    BV --> BW["Esc"]
    BW --> BX["Esc"]
    BX --> BY["Esc"]
    BY --> BZ["Esc"]

Figure 4 Setting examples for communication address and Baud Rate

When input digits, “” can be used as cursor “” motion button; “” is “add” button, “” is Exit the programming operation interface or switch to the character interface from digit modification interface, add from the beginning after setting the digit to the maximum value.

4.3. Communication function

Characterized with a RS485 communication interface, the baud rate can be changed between 1200bps, 2400bps, 4800bps and 9600bps. It conforms to DL/T645-2007 or ModBus-RTU protocol requirements.

Factory default communication parameters is DL/T 645-2007 protocol, the default baud rate is 2400bps, with the calibration bit and stop bit to be E.1 and instrument address (please see instrument factory number or crystal display screen).

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 10, Total 18

Customized communication parameter is ModBus-RTU protocol, the baud rate is 9600bps, with the calibration bit and stop bit to be n.1, and the instrument address to be 1. The following table is the common ModBus protocol address table, can be asked for specified communication protocol by calling. ModBus_RTU protocol read command is 03H, write command is 10H.

Table 10 ModBus protocol address table

Parameter address	Parameter code	Instructions of parameters	Data type	Data length Word	Read Write
Keyboard parameters (specific parameters see the instructions of programming parameters, the actual value with (*) parameter= communication parameter value × 0.1)
0000H	REV.	Version No.	16 bit with Signed char	1	R/W
0001H	UCode	Programming code codE(1~9999)	16 bit with	1	R/W
0002H	ClrE	Power reset CLr.E(1:energy clear)	Signed char	1	R/W
0003H	net	Network selection (0:three phase four wire,1:three phase three wire)	16 bit with	1	R/W
0006H	I r A t	Current transformer rate IrAt(1~9999)	Signed char	1	R/W
0007H	Ur A t	Voltage transformer rate UrAt (*) (1~9999 represents voltage ratio 0.1~999.9)	16 bit with	1	R/W
000AH	Disp	Rotating display time (s)	Signed char	1	R/W
000BH	B.LCD	Backlight time control (s)	16 bit with	1	R/W
000CH	Endian	Single-precision floating point size end mode (0:ABCD;1:CDAB;2:BADC;3:DCBA;)	Signed char	1	R/W
002CH	Protocol	Protocol switching (1:DL/T645-2007;2:n.2;5:n.1;6:E.1;7:o.1)	16 bit with	1	R/W
002DH	bRud	Communication baud rate bAud (0:1200;1:2400;2:4800;3:9600;4:19200)	Signed char	1	R/W
002EH	Addr	Communication address Addr(1~247)	16 bit with	1	R/W
Electricity data on the secondary side
2000H	Uab	Three phase line voltage data, Unit V(×0.1V)	float	2	R
2002H	Ubc		float	2	R
2004H	Uca		float	2	R
2006H	Ua	Three phase phase voltage data, Unit V V(×0.1V) (Invalid for three phase three phase)	float	2	R
2008H	Ub		float	2	R

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 11, Total 18

200AH	Uc		float	2	R
200CH	Ia	Three phase current data, Unit A(×0.001A)	float	2	R
200EH	Ib		float	2	R
2010H	Ic		float	2	R
2012H	Pt	Combined active power, Unit W(×0.1W)	float	2	R
2014H	Pa	A phase active power, Unit W(×0.1W)	float	2	R
2016H	Pb	B phase active power, Unit W(×0.1W)(Invalid for three phase three phase)	float	2	R
2018H	Pc	C phase active power, Unit W(×0.1W)	float	2	R
201AH	Qt	Combined reactive power, Unit var(×0.1var)	float	2	R
201CH	Qa	A phase reactive power, Unit var(×0.1var)	float	2	R
201EH	Qb	B phase reactive power, Unit var(×0.1var)(Invalid for three phase three phase)	float	2	R
2020H	Qc	C phase reactive power, Unit var(×0.1var)	float	2	R
202AH	PFt	Combined power factor(positive number:inductive, negative number: capacitive) (×0.001)	float	2	R
202CH	PFa	A phase power factor(positive number: inductive,negative number: capacitive)(Invalid for three phase three phase) (×0.001)	float	2	R
202EH	PFb	B phase power factor(positive number: inductive,negative number: capacitive)(Invalid for three phase three phase) (×0.001)	float	2	R
2030H	PFc	C phase power factor(positive number: inductive,negative number: capacitive)(Invalid for three phase three phase) (×0.001)	float	2	R
2044H	Freq	Frequency, Unit Hz(×0.01Hz)	float	2	R
Power secondary side data
101EH	ImpEp	(current) positive total active energy	float	2	R
1028H	ExpEp	(current) negative total active energy	float	2	R
1032H	Q1Eq	(current) Total reactive energy of the first quadrant	float	2	R
103CH	Q2Eq	(current) Total reactive energy of the second quadrant	float	2	R
1046H	Q3Eq	(current) Total reactive energy of the third quadrant	float	2	R

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 12, Total 18

1050H

Q4Eq

(current) Total reactive energy of the fourthquadarant

float

2

R

Note 1: When the ratio of the voltage transformer is 1, the data of read voltage transformer ratio register UrAt is 10. When the ratio of voltage transformer is 1, ignore the above table(UrAt×0.1).

Note : Single-precision floating point adopts standard IEEE754 format, total 32 bit(4 word). The single-precision floating point mode is assumed to be 0, ABCD(high type in the front, low byte behind).

4.4. Energy measurement function

The horizontal axis of the measurement plane represents the current vector I (fixed on the horizontal axis), and the instantaneous voltage vector is used to represent the current power transmission. Compared with the current vector I, it has phase angle . The counter-clockwise direction angle is positive.

Figure 11 Measurement schematic diagram for energy four quadrants

5. Outline and installation size

able 12 Installation size

Model	modulus	Outline size(length× width× height) mm	Installation size(din rail)
DTSU666	4	100× 72× 65	DIN35 din rail
DSSU666	4
DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 13, Total 18

Figure 5 Outline size diagram

Figure 6 current cable terminal (Conductor Cross-sectional Area Range ≤ 16mm^2 )

Figure 7 RS485 cable terminal (Conductor Cross-sectional Area Range 0.25-1mm2)

1. Installation and operation manual

6.1. Inspection Tips

When unpacking the carton, if the shell has obvious signs caused by severe impact or falling, please contact with the supplier as soon as possible.

After the instrument being removed from the packing box, it should be placed on a flat and safe plane, facing up, not overlaying for more than five layers. If not installed or used in a short time, the electric meter shall be packed and placed to the original packing box for storage.

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 14, Total 18

6.2. Installation and tips

6.2.1. Installation and Inspection

If the model No or configuration in the original packing box is not in accordance with the requirement, please contact with the supplier. While, if the inner package or shell has been damaged after removing the instrument from the packing box, please do not install, power on the instrument, please contact with the supplier as soon as possible, instead.

6.2.2. Installation

It requires experienced electrician or professional personnel to install it and you must read this operation manual. During the installation, if the shell has obvious damage or marks caused by violent impact or falling, please do not install it or power on and contact with the supplier as soon as possible.

Figure 8

6.3. Typical wiring

Figure 9 Three phase four wire: direct connect

Figure 10 Three phase three wire: direct connect

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 15, Total 18

Figure 11 Three phase four wire: Connection throughcurrent transformers

Figure 12 Three phase three wire: Connection through current transformers

Figure 13 RS485

Figure 14 Pulse output

◆ Voltage signal (only for connection via current transformer)

2----UA (Phase A voltage input terminal)

5 ----UB (Phase B voltage input terminal)

8----UC (Phase C voltage input terminal)

10----UN (Phase N voltage input terminal)

◆ Current signal:

1----IA*(Phase A current input terminal)

3----IA (Phase A current output terminal)

4----IB*(Phase B current input terminal)

6----IB (Phase B current output terminal)

7----IC*(Phase C current input terminal)

9----IC(Phase C current output terminal)

◆ RS485 Communication wire

24----A (RS485 Terminal A)

25----B (RS485 Terminal B)

◆ Auxiliary function

19---- Active energy and reactive energy output high terminal

21---- Active energy and reactive energy output low terminal

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 16, Total 18

◆ Auxiliary function

19---- Active energy and reactive energy output high terminal

21---- Active energy and reactive energy output low terminal

1. Diagnosis, analysis and elimination for common faults

Fault phenomenon	Reason analysis	Elimination
No display when powered on	1、Incorrect wiring2、Abnormal voltage for the instrument	1. If it is wrongly connected, please reconnect based on the right wiring mode (see the wiring diagram).2. If the supplied voltage is abnormal, please choose the specified voltage.3. If not the above problems, please contact with the local supplier.
Abnormal RS485 communication	1. RS485 communication cable is opened, short circuit or reversely connected.2. Address, baud rate, data bit and check bit is not in accordance with the host computer.3. The end of RS485 communication cable has not been matched with resistance (when the distance over than 100 meters)4. Not matched with the communication protocol order of the host computer	1. If there is any problem with the communication cable, please change it.2. Set the address, baud rate, data bit and check bit through buttons and confirm it is the same with the host computer, then set the operation to be “parameter settings”.3. If the communication distance is over than 100 meters, and the communication parameter settings are the same as the host computer, but cannot be communicated, then please lower the baud rate or add a resistance of 120Ω at the start terminal and ending

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 17, Total 18

		terminal.
Abnormal data for the electrical parameter (voltage, current, power, etc.)	1. The transformer's ratio hasn't been set, and the instrument displays the secondary side data.2. Wrong wiring.	1. If setting the transformer ratio, please set the voltage ratio and current ratio based on “parameter setting”2. If wrongly connected, please connect the voltage and current of phase A, B and C to the wiring terminal of the instrument.
Abnormal data for the electrical parameter read by communication (voltage, current, power, etc.)	1. Data read by communication is secondary side data, without transformer ratio.2. Wrong analysis for data frame	1. Multiply the data read by communication with the voltage ratio and current ratio.2. Analyze the data frame based on the format of the communication protocol, please pay attention to the mode of the big and small end of data.

8. Transportation & Storage

When transporting and unpacking the products, please confirm they are not severely impacted, transporting and storing based on Transportation, basic environmental conditions and testing methods for instrument and meters of JB/T9329-1999.

The instrument and accessories shall be stored in the dry and ventilated places, to avoid humidity and corrosive gas erosion, with the limited environmental temperature for storage to be -40^ +70^ and relative humidity not exceeding 85%.

9. Maintenance & Service

We guarantee free reparation and change for the multi-meter if found any unconformity with the standard, under circumstance of that the users fully comply with this instructions and complete seal after delivery within 18 months.

DTSU666 series and DSSU666 series three phase electronic energy meter(DIN-Rail)	ZTY0.464.1002
Operation manual	Page 18, Total 18

Dear clients,

Please assist us: when the product life is end, to protect our environment, please recycle the product or components, while for the materials that cannot be recycled, please also deal with it in a proper way. Really appreciate your cooperation and support.

Name of Company: Zhejiang Chint Instrument & Meter Co., Ltd.

Address: Wenzhou Bridge Industrial Zone, Yueqing, Zhejiang, China.

Zip Code: 325603

Telephone: [phone]

Fax: [phone]

Service hotline: [phone]

Fake Complaint: 0577-62789987

Website: http://www.chint.com

Email: [e-mail]

Date of Issue: June, 2019

No.:ZTY0.464.1002V1