Product DescriptionJLSZV-35 series three-phase outdoor dry-type
high-voltage combined transformer (with meter is called power
metering box), respectively suitable for 50Hz or 60Hz
three-phase AC, rated voltage of 35kV power grid for energy
measurement, and installed in the power supply transformer On
the high-voltage side of the high-voltage line, the
instrument box is equipped with a three-phase active watt-hour
meter and a reactive watt-hour meter, or a combined active
and reactive power electronic meter, which is a metering
device used to directly measure active and reactive energy in
high-voltage lines. It plays an important role in preventing
electricity theft, saving energy and strengthening power
supply management. All indicators meet the requirements of national
GB20840.2-2014, 20840.1-2010, GB20840.3-2013 and enterprise
Q/YCD003-2003 standards. The products have passed the inspection of
the National Transformer Supervision and Inspection Center and are
approved by the State Economic and Trade Co mmission to be
included in the third batch Recommended products for national
urban and rural power grid construction and renovation. The
product can replace the oil-immersed power metering box.Model
DescriprtionTechinical parameters and structure dimensionsWiring
PrincipleProduct feature and scope of useJLSZV35 series three-phase
outdoor, dry-type, wide-load combined transformer (with metering
box), the unit components of the product are insulated by
outdoor epoxy resin casting, and the unit components are
assembled into one (or split) structure, so that the product
has It has the advantages of anti-ultraviolet, anti-aging,
anti-rain and so on. The product can be used for single,
double and triple current ratio, and the high precision of
0.2S ensures accurate measurement under wide load. Double and
triple current ratios adopt a second tap structure.Three-phase
two-element power metering box (combination transformer)The
three-phase three-wire combined transformer (two-element) consists
of two single-phase voltage transformers (PT) and two current
transformers (CT). Both PT and CT are electromagnetic, and
the two PT windings are connected by V/V. A three-phase measuring
device is formed, and the primary windings of the two CTs are
connected in series with phases A and C of the grid respectively.
There is a ground screw welded on the bottom mounting
bracket.Three-phase three-element power metering box (combination
transformer)Three-phase three-element power metering box (combined
transformer) Y/Y 0 connection metering box is a new generation
product improved on the basis of three-phase two-element VV
connection, because with the continuous development of
today's society, the power grid The load situation is also
constantly developing and changing, for example: single-phase
rectification of electrified railways, electric furnace smelting,
rectification and electrolysis, etc., as well as harmonics in
the power grid, and the imbalance of phase loads may cause
negative sequence or harmonics in the V/V connection. The
measurement is inaccurate because the wave has no channel
(according to the actual measurement, the Y/Y 0 connection
method can increase the income by 3%-15%), so our factory has
newly developed the Y/Y 0 connection method of the metering box to
adapt to the complex operating conditions. It can ensure
accurate measurement and cooperate with the current reform of
electric energy management. The metering box has the
characteristics of flexible measurement. For example, the
single-phase watt-hour meter can monitor the operation of each
phase load so as to find problems in time. If the load
changes greatly, please use the S-class (measurement range
from 1%-120% of the rated current) current transformer to be used
in In conjunction with the 1.5A-6A wide-load watt-hour meter,
so as to avoid the trouble of changing the ratio frequently.The
instrument box is connected with the secondary winding outlet of
the combined transformer. The instrument box is equipped with
a three-phase active watt-hour meter and a reactive watt-hour meter
each, or a three-phase active and reactive combined energy
meter, which can be clearly seen from the observation window
box. Read the numbers.(1) JLSZV-35 series combined transformers are
assembled from dry single components, and there is no oil
leakage problem, so oil-free is realized;(2) The voltage and
current are all cast with resin, like a building block structure,
which is easy to replace, easy to maintain, and saves
costs;(3) The product has high precision, and the current
transformer can reach 0.2S level, which realizes wide load
measurement;(4) The use of materials makes the product have high
dynamic and thermal stability;(5) The voltage part can be equipped
with a 220V auxiliary winding to provide power for switches,
etc.Conditions of Use:1. The ambient temperature is between -45°C
and 40°C, not exceeding the daily average temperatur
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