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Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer

Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer

  • Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer
Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer
Product Details:
Place of Origin: China
Brand Name: Chuangyin
Certification: KEMA/type test report
Model Number: OMF-17.5,OMF-24 JLSZY2-17.5(24)
Payment & Shipping Terms:
Minimum Order Quantity: 1 pc
Price: Negotiable
Packaging Details: Polywood
Delivery Time: 5-10 workdays
Payment Terms: L/C, T/T
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Detailed Product Description
Highest Voltage For Equipment Um (r.m.s.): 17.5kV / 24kV Rated Frequency: 50, 60 Or 50/60
Number Of CTs And VTs: 3VT+3CT Rated Primary Current: 5A Up To 1200A
Rated Secondary Current: 5Aor1A Standard: IEC 61869-1:2007、 IEC 61869-2:2012 IEC 61869-3:2011、IEC 61869-4:2013
High Light:

Primary Cable Metering Unit


Arrester Seat Metering Unit


24kV Pole Mounted Metering Box

Overhead pole mounted primary metering unit


This type metering box for outdoor dry-type three-phase primary metering unit, combined by three single phase transformers medium voltage measuring transformer assembly, each combination of single-phase combined CT&VT contains 1 set of CT coil and 1 set of VT coil, adopting alicyclic epoxy resin (CEP) vacuum pouring solid encapsulation, Cyclic epoxy resin (CEP) vacuum casting solid encapsulation, with excellent insulation performance and hydrophobicity, the surface is resistant to acid and alkali corrosion, pollution, and UV. It’s suitable for outdoor overhead line is connected to the public power system installation. The meter box is equipped with a meter box under the installation base of the metering box. The high and low voltage integrated anti-theft design is fast and easy to install. It is suitable for electrical energy metering, current and voltage measurement in urban and rural power distribution network lines with a maximum voltage of 24kV and below.


1.General parameters:

No. item units specification
OMF-17.5 OMF-24

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


kV 17.5 24
2 rated frequency (fR) Hz 50, 60 or 50/60

Rated lightning impulse
withstand voltage (peak)


kV 95,110 125,150

Rated power-frequency
withstand voltage on primary


kV 38 50

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
Rated primary current 5A up to 1200A
Rated secondary current 5Aor1A
Rated Continuous Thermal Current 120%,125%,150%,200%,etc.
Rated Short time current (Ith) (thermal 1 second) 80xIpr,100xIpr
Rated Dynamic Current (Idyn) 2.5xIth
Rated Output(VA) 5,10,12.5,15,20
Accuracy Class 0.2S,0.2,0.5S,0.5,1 Metering
Instrument Security Factor (FS) 5,10,20
Applicable Standard IEC: 61869-1&2

Voltage transformer specifications


No Item characteristic
OMF-17.5 OMF-24
Rated primary voltage(V) 13200/√3,13800/√3, 15000/√3,7200,8400,etc. 20000/√3,22000/√3, 14400, etc.
Rated secondary voltage(V) 100/√3,110/√3, 115/√3, 120/√3, 110,115,120
Rated Voltage Factor




Standard connection Y-Y connection
Rated Output(VA) 15,20,25,30,50,75
Accuracy Class 0.2,0.5,1,3 Metering
Thermal burden(VA) 500
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.

Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer 0


Primary Cable Arrester Seat 24kV Metering Unit Combined Transformer 1




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



Contact Details
Shenzhen Chuangyin Co., Ltd.

Contact Person: Mr. Dieky Lin

Tel: +86 138 2379 0397

Fax: 86-0755-8600-0614

Send your inquiry directly to us (0 / 3000)

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