มิเตอร์วัดพลังงาน มิเตอร์วัดกำลังไฟฟ้า 4P 10(100)A three phase Din rail KWH Watt hour din-rail energy meter LCD 3*230/400V 50Hz

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1.General Description

DTS238-4-M static three phase four wire energy meter for active energy adopt advanced large-scale integrated circuit IC and SMT manufacturing technology. They have following features: bi-directional or unidirectional energy measurement , wide voltage , anti-tamper , high accuracy and reliability , large overload , low self-consumption , small volume , light weight !The meter can also display three phase R.M.S current , voltage ,active power , reactive power ,power factory , frequency ,and interval active energy .

The meter should be installed in suitable environment with ambient temperature range between -25+55,the relative humidity less than 75% and temperature limits between and-40+70,   .

The meter is manufactured complying with international standard IEC62052-11 on “Electricity metering equipment (AC) General requirements tests and test conditions” and IEC62053-21 on “Static meters for active energy (classes 1 and 2)”.

2.Specification and Technical Parameters

2.1 Specification

• Meter type: DTS238-4-M
• Rate frequency: 50 or 60 Hz
• Rated current: 10(100)A
• Rate voltage: 3X230/400V
• Normal voltage range: 90%Un110%Un
• Limits voltage range: 70%Un120%Un
• Accuracy: Class 1
• Pulse constant: See meter

2.2 Technical Parameters

• 2.2.1 Basic tolerance

• 2.2.2 Self-consumption
  • Current circuit is less than 1.5VA
  • Voltage circuit is less than 2W/10VA
• 2.2.3 Starting current

       Under the rated voltage , rated frequency and COSΦ=1 , the meter shall start and continue to register on application of 0.2% In (if CT is used) or 0.4% Ib .

• 2.2.4 Anti-creeping

       The meter has anti-creeping logical circuit. When 115%Un is connected to the meter and current circuit is cut , the meter shall not create more than one pulse in a stipulated time

• 2.2.5 Average-life

       The meter can be used for at least 10 years in normal operation specified in this manual

• 2.2.6 LCD: 6+1 (999999.9kWh)

3.Basic Features

• 3.1 Measuring positive & negative active energy with negative energy accumulated into positive energy .
• 3.2 With three LED to show the on/off state of the power on three phases.
• 3.3 Measuring active energy without calibration under long term operation
• 3.4 Internal connection of current and voltage
• 3.5 High reliability due to adopting high quality components

4.Working principles

Three phase voltage and current are sampled from respective sampling circuit and transformed into suitable signal, which is carried into integrated circuit , then the meter output pulse signal in positive appropriation to measured power to drive step-motor counter or LCD counter to realize energy measurement. The meter has energy pulse output for testing with pulse width of 80+20ms

Diagram for Working Principles

5. Structure

The meter consists of meter base , meter cover , terminal base , terminal cover . there are lead seal on meter cover  and terminal cover . A special screw is used to fix the terminal cover on which a lead seal can be installed

6. Usage

You can use the button for display step by step , it will reset interval energy to zero if you push the button last 10s .

6.1 Connection diagram

• Wiring for 3*230/400V 50Hz

(current wire bottom in and up output)

Transformer input type connection diagram

Noting: for CT input type connection , the power consumed display in register is not fact power consumed. The fact power= the power display in register of meter X CT rate. For example , the power display in the register is 0.5 kWh and the CT is 800/5A , the fact power consumed=0.5 kWh X 160=80kWh

(current wire bottom in and up output)

Direct input type connection diagram

• L1  A phase wire
• L2  B phase wire
• L3  C phase wire
• N   Neutral wire
• 12  and 13   Test pulse output

6.2 Installation

• The meter can be installed on a 35 mm DIN rail
• 6.2.1 The meter can not installed and used until it is checked goods and sealed before delivery
• 6.2.2 The meter should be install in the water proof box indoor or outdoor . the meter’s box should be fixed on strong and flame-resistant wall with a recommended height of about 1.8 m , where there is no corrosive gas around .
• 6.2.3 The meter should be install fully in accordance with connection diagram on the terminal cover, it is better to use copper as the leading wire for connection. All screws should be tightened.
• 6.2.4 Diagram for installation dimension

7. Transportation and Storage

• 7.1 Heavy impact should be burdened to the products while transportation and unpacking.
• 7.2 The products should be stored in the original package and kept in place with temperature between -40+70,the relative humidity less than 75% and no corrosive gas around .
• 7.3 In storehouse , the meter should be placed on the shelf when kept in stock , there should not be more than 7 cartons piled up in vertical. Single-packed meters can not be piled up with more than 5 meters in vertical.

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