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          PRODUCTS
          Locatin : Products > > PRODUCTS > METERING UNITS
          15.5-36.5kV medium voltage overhead column mounted metering box and JLSZXW7-15/25/36 type combined transformer

          This type of metering box is an outdoor dry three-phase primary metering unit. The medium voltage metering transformer is assembled by up to 3 single-phase current transformers and 3 single-phase voltage transformers. The transformer adopts cycloaliphatic epoxy resin (CEP) vacuum casting solid encapsulation, which 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 can be equipped with a metering meter box. All the secondary leads of the transformer can be connected and collected in the meter box. It is also equipped with a test terminal block and a meter installation space. The meter can be configured according to the requirements or the user can configure the meter. After connecting it, it can be used for electric energy measurement, current and voltage measurement in urban and rural power distribution network lines with the highest voltage of 15.5/25.5/36.5kV and below.

          DESCRIPTION

          OMS-15,OMS-25,OMS-36

          Overhead pole mounted primary metering unit

           

          1  Basic parameters:

          No.

          Item

          Units

          Specification

          1. 

          Maximum system
          voltage (kV, rms)

          kV

          15.5

          25.5

          36.5

          2. 

          rated frequency (fR)

          Hz

          50, 60 or 50/60

          3. 

          Rated lightning impulse
          withstand voltage (peak)

           

          kV

          95kV,110 kV

          125 kV,150 kV

          200 kV

          4. 

          Rated power-frequency
          withstand voltage on primary

          kV

          34

          50

          70

          5. 

          Rated power-frequency
          withstand voltage on secondary

           

          kV

          2.5

          6. 

          Number of CTs and VTs

          pcs

          3VT+3CT ,3VT+2CT,2VT+2CT

          7. 

          Standard

          /

          IEEE(ANSI) C57.13-2006

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

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

           

          2. Product function and use:

          Overhead pole mounted primary metering unit need to be complied with the latest applicable industry standards and local and/or national electrical regulations (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 of the product:

          1. The medium voltage transformer of the metering unit can be assembled by up to 6 single transformers, which can be flexibly disassembled and assembled as required when shipped. It can be installed directly on the pole outdoors, which is convenient and quick;

          2. The metering unit can be equipped with a meter box as required and connected to the transformer connection. The meter installation space is reserved in the box, and the door lock seal structure is designed to prevent electricity theft.

          3. The meter box body is made of corrosion-resistant stainless steel or low-carbon steel of the same performance and the sealing design is weather-proof. The surface is coated with an anti-corrosion paint powder layer, which is resistant to acid and alkali corrosion and UV;

          4. The medium voltage combined transformer is insulated with epoxy resin solid encapsulation,. The surface is dirt-resistant and UV-resistant which has excellent dielectric and mechanical properties. It is oil-free, gas-free and maintenance-free that can meet the requirements of safe operation and environmental protection;

          5. The CT of the medium voltage combined transformer can be configured with dual ratios. The VT is equipped with anti-short circuit and overload protection design to avoid burning and explosion caused by VT short circuit and overload.

          6. The one-time connection adopts NEMA contact bar and wiring clamp connection. The wiring terminals of the corresponding area can be configured according to user requirements. Lightning arresters can be selected as required.

           

          4Product Specifications:

          Current transformer specifications

          No

          Item

          規格參數

          1. 

          Rated primary current

          5A up to 800A

          2. 

          Rated secondary current

          5A1A

          3. 

          Rated Continuous Thermal Current

          150%,200%,300% etc.

          4. 

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

          80xIpr

          5. 

          Rated Dynamic Current (Idyn)

          2.5xIth

          6. 

          Rated burden

          B-0.1,B-0.2,B-0.5,B-0.9

          7. 

          Accuracy Class

          0.15S,0.15,0.3,0.6,1.2 Metering

          8. 

          Applicable Standard

          IEEE C57.13-2006

          Voltage transformer specifications

          No

          Item

          Spec.

          1. 

          Rated primary voltageV)

          7200,

          77620,

          8400, etc.

          12000,

          13200, 

          14400, etc.

          34500/√3,

          20125, etc.

          2. 

          Rated secondary voltage(V)

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

          3. 

          Rated Voltage Factor

          1.1/Continuous

          1.25/8h,1.4/1min.,1.5/1min.,1.73/1min.

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

          4. 

          Standard connection

          Y-Y connection for 3CT+3VT

          5. 

          Rated burden

          W,X,M,Y,Z

          6. 

          Accuracy Class

          0.15,0.3,0.6,1.2 Metering

          7. 

          Thermal burden(VA)

          500,750,1000,1200,1500,etc.

          8. 

          Applicable Standard

          IEEE C57.13-2006

          Note: If the parameters required by the user exceed the range of the above table, it can be determined after consultation with our company.

           

          5. Product dimensions and wiring schematic diagram:

                                                                                                                                            OMS-15 Appearance dimension drawing     


                                                                                                                                   OMS-25 Appearance dimension drawing 



                                                                                                                                      OMS-36 Appearance dimension drawing 

            


                                             Optional meter box 1 (ANSI) size can be made as required

          Optional meter box 2 (IEC) size can be made as required


                                                                                                                                                                                                               

          Wiring diagram

           

          6. Special requirements

          Other specifications are available as per clients’ requests.


          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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