OMB-17.5F (JLSZXW3-17.5F)
1.General parameters
|
No.
|
item
|
units
|
specification
|
|
1
|
Highest voltage for
equipment Um (r.m.s.)
|
kV
|
17.5
|
|
2
|
Rated frequency (fR)
|
Hz
|
50, 60 or 50/60
|
|
3
|
Rated lightning impulse
withstand
voltage (peak)
|
kV
|
95 kV，110 kV
|
|
4
|
Rated power-frequency
withstand
voltage on primary
|
kV
|
38
|
|
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
IEEE (ANSI) C57.12-2016
|
2.Function and application
Overhead pole mounted primary metering unit complies with the latest
applicable industrial standards and local and or national electrical code (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 so as to reduce losses.
3.Main features
3.1The medium voltage transformer of the metering unit is composed of 3 single-phase combined transformers, which saves installation space and can be installed directly on the pole outdoors, which is convenient and quick;
3.2The junction box of the metering unit is installed with a test terminal block and the lead wire connected to the transformer, and the junction box door lock seal structure is with anti-electricity stealing design. The metering box can also be equipped with an electric meter box on the pole;
3.3The box is made of corrosion-resistant stainless steel or equivalent performance low-carbon steel with protective coating. The sealing design is weatherproof, acid and alkali corrosion resistant, and UV resistant;
3.4The medium voltage transformer is insulated with epoxy resin solid encapsulation and has excellent dielectric and mechanical performance. It is oil-free, gas-free and maintenance-free, meeting the requirements of safe operation and environmental protection.
3.5The CT of the medium voltage combined transformer can be configured according to double transformation ratios, and the VT is equipped with anti-short circuit and overload protection devices as required to avoid burning and explosion caused by VT short circuit and overload.
3.6The primary connection adopts copper contact bar and terminal clamp and can be equipped with terminal connectors with corresponding area as per user’s requirement. Lightning arrester can be selected as required.
4.Technical parameters
Current transformer
specifications
|
No
|
Item
|
Specification
|
|
1.
|
Rated primary current
|
5A up
to 800A
|
|
2.
|
Rated secondary current
|
5A or 1A
|
|
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
|
Specification
|
|
1.
|
Rated primary voltage（V)
|
13200/√3，13800/√3, 15000/√3,7200,8400
|
|
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
|
For required specifications that are out of the range above, please contact our company for further solution
5.Dimensions and wiring schematic diagram
Selective meter box 1 (IEC) can be manufactured as per required sizes
Selective meter box 2 (ANSI) can be manufactured as per required sizes
6. Special instructions
The company can design and manufacture product as per customized requirements by the customer.
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Chuangyin Activities 
Smart Distribution Solution 
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Welcome to call the hotline : 0755-86000713 
