Heyuan Intelligence DZ81-MS3UI7C User manual

DZ81-MS3UI7C
Three Phase Power Meter
User Manual
Heyuan Intelligence Technology Co., Ltd

IMPORTANT DECLARATIONS
Copyright © 2018 Heyuan Intelligence Technology Co., Ltd All Rights Reserved
This manual may not be reproduced, copied, transmitted or transcribed in whole or in part by any
means without the expressed written permission of Heyuan. Any shall be investigated for legal
responsibility in violation of copyright or other intellectual property rights of the Company. We check
the user manual’s contents regularly and will make necessary amendments in next version. Welcome
to give advice for some unexpected errors. The rights of upgrading without notice are reserved.
Please read this manual carefully before the product is operated. And once you start operating the
meter, you’ll be considered to have read this manual and accept all our terms. Heyuan shall not be
responsible or liable for any damages or injuries caused by improper meter installation and/or
operation.
Attention: the following symbols in this manual refer to meanings as follows
Electric Shock Symbol: Carries information about procedures which must be followed
to reduce the risk of electric shock and danger to personal health
Safety Alert Symbol: Carries information about circumstances which if not considered
may result in injury or death
The meter must be installed and operated by one who has experience with high-voltage devices or
has qualifications. Please connect the meter to correct voltage before operating the meter. Please
install and use the meter according to the user manual. Heyuan shall not be responsible or liable for
any damages or injuries caused without following the instructions in the user manual.

Contents
Chapter 1 Meter Overview ………………………………………………………………………………...1
Chapter 2 Specifications ………………………………………………………………………………….1
2.1 Input Voltage …………………………………………………….........................................1
2.2 Input Current ………………………………………………………………………………….1
2.3 Frequency Measurement …………………………………………………………………….1
2.4 Measuring Accuracy ………………………………………………………………………….1
2.5 Communication ……………………………………………………………………………….1
2.6 Power Supply………………………………………………………………………………….1
2.7 Pulse Output …………………………………………………………………………………..2
2.8 Working Condition ……………………………………………………………………………2
2.9 Input Voltage…………………………………………………………………………………...2
2.10 Input Current …………………………………………………………………………………2
Chapter 3 Dimension & Installation ……………………………………………………….……………2
3.1 External Dimension……………………………………………………………..…………….2
3.2 Cut-out Size …………………………………………………………………………..............2
3.3 Installation Method .………………………………………………………………................2
Chapter 4 Terminals ………………………………………………………………………………………..3
Chapter 5 Typical Wiring ………………………………………………………………………………….3
5.1 Wiring Instruction Voltage and Current Wiring Instruction………………………….…….3
5.2 Energy Pulse Output ……………………………………………………………….………..4
5.3 RS485 Interface……………………………………………………………………….……....4
5.4 Power Wiring……………………………………………………………………….………….4
Chapter 6 Meter Display and Operation ……………………………………………………………….4
6.1 Parameters Display ……………………………..……………………………………………4
6.2 System Parameter Setting …………………………………………………..………………5
6.3 Process of setting parameters ………………………………………………………………6
6.4 Parameters Setting Steps ……………………………………………………………………6
Chapter 7 After-sales Service …………………………………………………..……………………….9
Chapter 8 Contact Us ……………………………………………………………..……....………………9

1
Chapter 1 Meter Overview
DZ81-MS3UI7C is an advanced smart power meter. It is widely used in power distribution sites,
energy management systems and intelligent monitoring systems of different industries. It measures
electric parameters i.e. three-phase/line voltage, three-phase current, active power, reactive power,
power factor, frequency, active energy, reactive energy etc. Equipped 1-channel 485 communication
interface and 2-channel of pulse output, it supports standard Modbus RTU communication protocol.
Display: LCD Display
Chapter 2 Specifications
2.1 Input Voltage
Reference Voltage: 3×220V/380V Voltage Range: 0~1.2Un
2.2 Input Current
Secondary Current of CT: 1(5)A Current Range: 0~1.2In
2.3 Frequency Measurement
Frequency Measuring Range: 45~65Hz
2.4 Measuring Accuracy
Voltage/Current Accuracy Class: 0.2%
Energy Accuracy Class: Class 0.2S
Power Factor: 0.1%
Frequency: ±0.01Hz
2.5 Communication
RS485/Modbus-RTU Communication Protocol Baud Rate: 1200~9600bps (programmable)
Remark: DZ81-MS3UI7C adopts RS485 interfaces and Modbus RTU communication protocol to communicate. The
terminals are 485A and 485B. The RS485 transmission medium is shielded twisted pair. In addition, the RS485 interfaces
can also be used for device maintenance and upgrading. The communication default values are as follows.
Communication Default Value
Address
Baud Rate
Data Bits
Stop Bits
Parity
01
9600bps
8
1
No
2.6 Power Supply
Power Supply: AC85~265V(45～55HZ)/ DC85～300V Power Consumption: <3VA
Power-line Connection Terminals: L/+ and N/-
Remark: Terminals for the power supply are (L/+, N/-). If the quality of power is poor or there is an EMI problem, it’s
recommended to equip an EMC filter in the auxiliary power supply loop to increase resistance to interference.

2
2.7 Pulse Output
Pulse Constant: 7200imp/kWh
2.8 Working Condition
Operating Temperature: -20℃～+65℃ Storage Temperature: -40℃～+85℃
Relative Humidity: 20%～90%(non-condensing)
2.9 Input Voltage
Input voltage should not be over rated input voltage. Otherwise, PT should be taken into account.
Please make sure input voltage be in accordance with input current, that is the phase number should
be same. Otherwise, value error will occur.
2.10 Input Current
The rated input current is 5A. If current is over 5A, external CTs should be used. When opening the
meter or changing current wiring, please make sure that the primary circuit is powered off.
Chapter 3 Dimension & Installation
3.1 External Dimension (unit: mm) 3.2 Cut-out Size (unit: mm)
Front View Side View Cut-out Size
Model No.
Dimension(mm)
Cut-out Size(mm)
DZ81-MS3UI7C
72mm*72mm*87.2mm
68mm*68mm
3.3 Installation Method
This meter DZ81-MS3UI7C should be installed in a dry and dust free environment, and avoid
exposing to excessive heat, radiation and high electrical noise source. The meters can be installed
into a standard panel of switch cabinet.
A. Remove the clips from the meter and insert the meter into the panel from the front side. Make
sure that the screen is at the front of the panel.
B. Install clips on the back side of the meter and fix tightly to ensure the meter is affixed to the panel.

3
Chapter 4 Terminals
QE-
QE+
PE-
PE+
NC
485B
485A
NC
N/-
L/+
1
2
3
4
5
6
7
8
9
10
Energy Pulse Output
RS485
Communication
Power Supply
Upper Row of Terminals
Ua
Ub
Uc
Un
Ia
Ia*
Ib
Ib*
Ic
Ic*
21
22
23
24
25
26
27
28
29
30
Voltage Input
Current Input
Lower Row of Terminals
Chapter 5 Typical Wiring
5.1 Voltage and Current Wiring Instruction
A. Three-phase Four-wire Wiring Mode (3LN, 3CT)
The star-like 3-Phase 4-Line wiring mode is commonly used in low-voltage electric distribution power
systems. The “UL” (voltage wiring mode) on the parameter setting interface should be set as “3Ln”;
“IL” (current wiring mode) should be set as “3C”.
B. Three-Phase Three-Line Wiring Mode (2LL, 2CT)

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Open delta wiring mode is often used in high-voltage systems. For this mode, the UL (voltage wiring
mode) should be set as “2Ln”, and the IL (current wiring mode) should be set as “2C” on the
parameter setting interface.
5.2 Energy Pulse Output 5.3 RS485 Interface 5.4 Power Wiring
3 4
PE- PE+
Vi
+
-
1 2
QE- QE+
Vi
+
-
Vi<30V
i<10mA
Vi<30V
i<10mA
6 7
485B 485A
910
L/+N/-
DZ81-MS3UI7C can be used for measuring three phase voltage in low-voltage and high-voltage
systems. According to different wiring modes, corresponding wiring mode should be set on the
“Voltage Wiring Mode Setting Interface”.
Chapter 6 Meter Display and Operation
There are four buttons on the front panel, labeled button “ ”, button “ ”, button “ ” and
button “ ” from left to right. It can be used for reading real-time data and setting parameters
though the four buttons.
6.1 Parameters Display
6.1.1 Press button “ ”, it will cyclically display the values of phase voltage, line voltage, current.
Phase Voltage Line Voltage Current
6.1.2 Press button “ ”, it will cyclically display the values of energy parameters, including active

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energy values and reactive energy values etc.
Import Active Energy Export Reactive Energy Net Active Energy Total Reactive Energy
6.1.3 Press button “ ”, it will cyclically display the values of active power, reactive power, power
factor and frequency.
Active Power Reactive Power Power Factor Frequency
6.2 System Parameter Setting
On real-time data display interface, press “ ” and “ ” simultaneously, it will enter the system
parameter setting interface.
At the setting mode:
The button “ ” is used for digital shift. Press button “ ” each time to shift one digit, which will
flash at the same time.
The button “ ” is used to plus 1. Press button “ ” each time and the flashing digit will plus 1. If
the flashing digit is 9, press button “ ” and the digit will become 0.
The button “ ” is used to minus 1. Press button “ ” each time and the flashing digit will minus 1.
If the flashing digit is 0, press button “ ” and the digit will become 9.

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The button “ ” is used to confirm the setting and switch to the next setting interface. When
switching to last interface, press button “ ” again, it will exit the system parameter setting mode
and switch back to the real-time data display interface.
At any setting interface, press button “ ” and “” simultaneously, it will exit the setting interface
and switch back to the real-time data display interface.
6.3 Process of Setting Parameters
Password Inquiry Meter Address Baud Rate Voltage Wiring Mode
Current Wiring Mode PT Ratio CT Ratio
6.4 Parameters Setting Steps
6.4.1 “PS” Interface, i.e. Password Inquiry Interface
Press buttons “ ” and “ ” simultaneously, it will enter password inquiry interface. Enter meter
password, whose default is “0000”. After setting, press button “ ” to confirm and enter “ID”
interface. If the password is not correct, it won’t enter “ID” interface
6.4.2 “ID” Interface, i.e. Meter Address Interface
This interface displays the present meter address, whose value ranges from 1 to 247. Enter meter
address, whose default is “001”. After setting, press button “ ” to confirm and enter “BT” interface.

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6.4.3 “BT” Interface, i.e. RS485 Communication Baud Rate Setting Interface
This interface displays the present communication baud rate, whose default is “9600” and can be
set as 9600, 4800, 2400, 1200. After setting, press button “ ” to confirm and enter “UL” interface.
6.4.4 “UL” Interface, i.e. Voltage Wiring Mode Setting Interface
There are 2 options for the voltage wiring modes, i.e. “3Ln” referring to 3-phase 4-wire wiring mode;
and “2LL” referring to 3-phase 3-wire wiring mode. After setting, press button “ ” to confirm and
enter “IL” interface.
6.4.5 “IL” Interface, i.e. Current Wiring Mode Setting Interface
There are 2 options for the current wiring modes, i.e. “3C” referring to 3 CTs used for current wiring;
“2C” referring to 2 CTs used for current wiring to calculate phase B current in three-phase balanced
environment (some model numbers don’t support this option). After setting, press button “ ” to
confirm and enter “F5” interface.
6.4.6 “PT” Interface, i.e. PT Ratio Setting Interface
This interface displays the present PT ratio, whose value ranges from 1 to 2000. After setting, press
button “ ” to confirm and enter CT ratio setting interface.
For example, if the PT ratio is 10KV/400V, the PT ratio will be 25, that is to divide 10,000 by 400.
Setting examples:
If the PT ratio is 10kV/400V, the PT ratio will be 25, that is to divide 10,000 by 400.
Remark: The product of PT ratio and CT ratio is not more than 300,000.
6.4.7 “CT” Interface, i.e. CT Ratio Setting Interface
This interface displays the present CT ratio, whose value ranges from 1 to 1000. The setting methods
are as follows. After setting, press button “ ” to confirm and enter RE1 interface, the relay interface
(some model numbers don’t support this option).
6.4.8 Press button “ ” and “ ” simultaneously at any setting interface, it will exit the setting
interface and switch back to the parameter display interface.
6.4.9 Press button “ ” , button “ ” and “ ” simultaneously to enter password inquiry interface.
Enter meter password, whose default is “0000”. After setting, press button “ ” to confirm and enter
“ST” interface. If the password is not correct, it won’t enter “ID” interface

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6.4.10 “ST” Interface, i.e. Password Setting Interface
This interface displays the present meter password, whose value ranges from 0000 to 9999. After
setting, press button “ ” to confirm and enter E0 interface.
Password Setting Interface
6.4.11 “E0” Interface, i.e. Energy Ratio Switch Setting Interface
This interface displays the present energy ratio switch, whose value ranges from “0” to “1”. “0”
referring to closed state of the energy ratio switch, which means the energy value on the energy
interface is the secondary energy value through CTs. “1” referring to open state of the energy ratio
switch, which means the energy value on the energy interface is the real primary energy value. After
setting, press button “ ” to confirm and enter F20 interface.
6.4.12 “F20” Interface, i.e. Meter Software Version No. Interface
This interface displays the meter software version number, which is read-only number. Press button
“ ” to enter F21 interface.
6.4.13 “F21” Interface, i.e. Meter Hardware Version No. Interface
This interface displays the meter hardware version number, which is read-only number. Press button
“ ” to exit system parameter setting and switch back to parameter display interface.
Software Version No. Hardware Version No.

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Chapter 7 After-sales Service
Product Warranty
1. The product warranty period is one year.
2. The company is responsible for free maintenance or exchange within one-year warranty period.
3. The cost of the components and freight shall be charged for improper meter installation and/or
operation.
4. Over the warranty period, part of the maintenance cost according to actual situation will be
charged.
Service Guarantee
1. Product technical consulting and quality complaints will be replied within 12 hours.
2. Solutions for quality complaints will be provided within 24 hours.
3. Except statutory holidays and force majeure.
Chapter 8 Contact Us
Headquarter Add.: 7F No.1 Aosheng Building, 1166 Xinluo Street, High-tech Development Zone,
Jinan, P.R. China 250101
Factory Add.: 2F Innovation Factory, Feiyue Road, High-tech Development Zone, Jinan, P.R. China
250101
Tel: [phone] 863
E-mail: [e-mail]
Website: www.heyuanintel.com