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          PRODUCTS
          Locatin : Products > > PRODUCTS > METERING UNITS
          17.5(24)kV Overhead Pole Mounted Metering Box with Primary Cable and Arrester Seat,JLSZY2-17.5(24) Combined Transformer
          This type of metering box is an outdoor dry three-phase primary metering unit. The medium voltage metering transformer is assembled by 3 single-phase combined transformers, each single-phase combined transformer includes 1 set of CT coil, 1 set of VT coil and lightning arrester connection The seat is made of alicyclic epoxy resin (CEP) vacuum casting solid encapsulation. It has excellent insulation performance and hydrophobicity. The surface is resistant to acid and alkali corrosion, pollution, and UV. It is suitable for outdoor overhead line installation and connection to public power systems. The metering box is equipped with a meter box under the installation base, high and low voltage integrated anti-theft design, fast installation, suitable for electrical energy metering, current and voltage measurement in urban and rural power distribution network lines of equipment with a maximum voltage of 24kV and below.
          DESCRIPTION

          OMD-17.5,OMD-24

          1.General parameters:


          No.

          item

          units

          specification

          OMD-17.5

          OMD-24

          1.    

          Highest voltage for
          equipment Um (r.m.s.)

          kV

          17.5

          24

          2.    

          rated frequency (fR)

          Hz

          50, 60 or 50/60

          3.    

          Rated lightning impulse
          withstand voltage (peak)

          kV

          95,110

          125,150

          4.    

          Rated power-frequency
          withstand voltage on primary

          kV

          38

          50

          5.    

          Rated power-frequency
          withstand voltage on secondary

          kV

          3

          6.    

          Number of CTs and VTs

          pcs

          3VT+3CT

          7.    

          Standard

          /

          IEC 61869-1:2007、 IEC 61869-2:2012

          IEC 61869-3:2011、IEC 61869-4:2013

          2.Function and application.

          Overhead pole mounted primary metering unit Comply with the latest applicable industry standards and local and/or national electrical regulations (such as IEC, IEEE (ANSI), CAN, GOST, CEF). It is used for three-phase overhead power grid energy measurement management and distribution network automation management system. The primary side measurement is more accurate, and the power loss of the line can be effectively measured to reduce losses.


          3.Main features

          3.1.The medium voltage transformer of the metering unit is composed of 3 single-phase combined transformers, which saves installation space. There is a meter box under the installation base. The high and low voltage integrated anti-stealing design can be installed directly and convenientlyon the pole outdoors.


          3.2.The metering unit is equipped with a meter box and connected to the transformer connection. The meter and communication module installation space are reserved in the box, and the meter box door switch, proximity sensor, data debugging port, conversion switch, and door lock seal structure are reserved. To prevent electricity theft.


          3.3.The meter box body is made of corrosion-resistant alloy aluminum or low-carbon steel with the same performance and hot-dip galvanized, and the sealing design is weatherproof, acid and alkali corrosion resistant, and UV resistant; 


          3.4.The medium voltage combined transformer is insulated with epoxy resin solid encapsulation, the surface is dirt-resistant, UV-resistant, has excellent dielectric and mechanical properties, no oil, no gas, and maintenance free, meeting the requirements of safe operation and environmental protection. 


          3.5.The CT of the medium voltage combined transformer can be configured double transformation ratios, and it is convenient to set the conversion switch to change the transformation ratio. The VT is equipped with anti-short circuit and overload protection design to avoid burning and explosion caused by VT short circuit and overload. 


          3.6 The cable for the overhead line has been connected to the primary end, and the cable of the corresponding area and length can be configured according to user requirements.


          4.Technical parameters.


          Current transformer specifications


          No

          Item

          characteristic

          1.    

          Rated primary current

          5A up to 1200A

          2.    

          Rated secondary current

          5Aor1A

          3.    

          Rated Continuous Thermal Current

          120%,125%,150%,200%,etc.

          4.    

          Rated Short time current (Ith) (thermal 1 second)

          80xIpr,100xIpr

          5.    

          Rated Dynamic Current (Idyn)

          2.5xIth

          6.    

          Rated Output(VA)

          5,10,12.5,15,20

          7.    

          Accuracy Class

          0.2S,0.2,0.5S,0.5,1 Metering

          8.    

          Instrument Security Factor (FS)

          5,10,20

          9.    

          Applicable Standard

          IEC: 61869-1&2


          Voltage transformer specifications


          No

          Item

          characteristic

          OMD-17.5

          OMD-24

          1.    

          Rated primary voltageV)

          13200/√3,13800/√3, 15000/√3,7200,8400,etc.

          20000/√3,22000/√3, 14400, etc.

          2.    

          Rated secondary voltage(V)

          100/√3,110/√3, 115/√3, 120/√3, 110,115,120

          3.    

          Rated Voltage Factor

          1.2/Continuous

          1.5/30s,1.9/30s,1.9/8h

          1.5/30s,1.9/30s,1.9/8h

          4.    

          Standard connection

          Y-Y connection

          5.    

          Rated Output(VA)

          15,20,25,30,50,75

          6.    

          Accuracy Class

          0.2,0.5,1,3 Metering

          7.    

          Thermal burden(VA)

          500

          8.    

          Applicable Standard

          IEC: 61869-1&3

          If the parameter requested exceeds the range of the above table, it can be determined after negotiation with our company.




          5.Dimensions and wiring schematic diagram.







          6.Special instructions.

          The company can design and manufacture specially according to the special requirements of customers.




          Contact Us

          Email: international2@chuangy.com

          Address: 1F and 4F block B,Jiada R&D Bldg, High-tech Park,Nanshan,Shenzhen,China

          Post code :518057

          Tel. 0086-755-86000713


          Copyright © 2019. Shenzhen Chuangyin   Co., Ltd. All rights reserved. 粵ICP備11018302號
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