Oil-Immersed Arc-Suppression Coil and Earthing Transformer Operating Instructions SIEYUAN ELECTRIC CO.,LTD

1 Application Scope The Operating Instructions are applicable to the transportation, the storage, the installation, the operation and the maintenance of oil-immersed arc-suppression coils with the nominal capacity of 5000kVA and below and the voltage class of 66kV and below (hereafter referred to as voltage-regulation oil-immersed earthing transformers with the nominal capacity of 5000kVA and below and the voltage class of 35kV and below (hereafter referred to as “earthing transformer” for short). 1.1 The arc-suppression coils are used for compensating single-phase reactors generating condenser...

3 Model of the product 3.1 Arc-suppression coil The Sequence of the Letters in the Product Model and Their Meanings

Primary rated voltage（kV） Secondary rated capacity（kVA） （kVA）Primary rated capacity Design serial number Three phase Earthing transformer 4.1 Height above sea level ≤1000m 4.2 Environmental temperature The maximum temperature +40℃ Maximum annual average temperature 20℃ The average temperature of the hottest month 30℃ The minimum temperature 4.3 Relative humidity ≤95% 4.4 There shall be no obvious dirt in the installation environment 4.5 The ground acceleration caused by earthquake ag Below 3m/s2 in the horizontal direction; Below 1.5m/s2 in the vertical direction. 4.6 If the above conditions...

weight of the products. The lifting loops or hanging handles are just for lifting the products; when the products are lifted, the included angles between the ropes and the vertical lines are less than 30 degrees. Attention shall be paid to riggings such as rope clamps, strippers and so on which shall not squeeze porcelain sleeves and other fittings. 5.3 During transportation the products shall be put horizontally as far as possible with the maximum gradient less than 10 degrees, and shall not be impacted violently. After the user unit receives the products, he shall immediately check the specification,...

absorbers installed to ensure certain oil pressure and oil quantity and to be adapted to the temperature fluctuation. 8 Installation 8.1 When the product is installed on the field, no position of the product is allowed to be welded (welding components and parts). If the product needs welding in an exceptional case, cooling measures must be taken around the welded points to prevent the transformer oil from being decompounded into gas, or else, the transformer oil is incorrect. 8.2 Before the product is put into running test, all of fastening bolts in the product shall be fastened again. 8.3 When...

cover on the top of the oil conservator shall be opened to inject correct transformer oil to the normal oil level in the oil conservator (the oil level depends on the ambient temperature). During oil injection, all of air relief cocks must be opened until the oil bleeds out when the cocks shall be closed. 8.8.2 For the products in full-sealed corrugated tank structure, the oil level read on the top tube-type oil level gauge on the tank cover shall be checked. In case the oil is not full, it shall be injected. When oil is injected, all of air relief cocks and the rotary cover on the top of the...

valves (unless specially specified, it is present for arc-suppression coil with the capacity of more than 630kVA; it is present for the earthing transformer with the capacity of more than or equal to 800kVA). 8.12.2 Transformer oil is filled in the sleeves. 8.12.3 Air is drained from the air relay. 8.13 In case the product is provided with the air relay, after it is installed on the basal plane, one end of the oil conservator shall be blocked up by 10 to 15mm so that the product is slightly inclined to increase the action sensitivity of the air relay. 8.14 On completion of the installation, all...

the conditions, the rating shall be achieved as far as possible; pay attention to the sound of the product and the change in instruments during the test. 9.1.4.2 The circuits of the product regulated by regulating the capacity and the high impedance shall be connected according to relevant requirements. 9.1.4.3 The impedance value of the product shall not be significantly different from the delivery test results (see the corresponding test values on the test reports of the product). The voltage is regulated to a nominal value (depending on the test conditions), and the switch is regulated to...

（short-circuited to co）, CO/cb（short-circuited to ao）; when the group of joining is ZNyn1: AO/ab（short-circuited to co）, BO/bc（short-circuited to ao）, CO/ac（short-circuited to bo）. In the test in 9.1.3 and the tests below, after the product is injected with oil, it must be left still for some time (at the level 6kV, for three hours; at the level 10kV, for 8 hours; at the level 35kV, for 24 hours; at the level 66kV, for 36 hours). During the tests, the precedence of the above items must be kept. 9.2 The following checks shall follow after the product passes the test in clause 7.1, 9.2.1 Calibrating...

increased gradually from zero so as to find out the fault early. 9.4 For arc-suppression coils, if PT and CT used for measurement are not used, the circuit of PT shall be open with one end earthed; after CT is short-circuited, it is earthed. 9.5 For the excitation-free tapping switch, when the locating pin on the top of the regulation handle of the switch is put in position, the number next to it is the grade of the switch. During the grade regulation, it must be powered off, and then the switch is turned to the grade required (the guide pin must be clamped in the clamping groove) before the...

running period is subject to the provisions on the nameplate. The voltage measurement coils provide load capacity of about 110V and 10A. 10.3 Earthing transformer: 10.3.1 After the neutral point of the earthing transformer is connected with the arc-suppression coil, single-phase switching-on is not allowed. Accordingly, it would be best that three-phase synchronizing switch shall be adopted on the high pressure side (for instance, three-phase oil switch, three-phase SF6 switch and so on); 10.3.2 On the primary side of the product the arc-suppression coil provides rated zero-sequence current;...