JP-0.4kV Reactive metering integrated distribution cabinet for district transformer
Key attributes
| Brand | ROCKWILL |
| Model NO. | JP-0.4kV Reactive metering integrated distribution cabinet for district transformer |
| Part | Transformer |
| Rated primary ampere turn | 400 |
| Rated primary current | 400A |
| Series | JP-0.4 |
Product descriptions from the supplier
Description ：
The distribution cabinetis an outdoor complete set of power distribution unit of three-phase AC50Hz and rated voltage of 400V, is applicable to urban and rural power grids, used for control, compensation and metering of output of transformer of 10KV to transformer. It realizes load control, meter reading, remote maintenance, anti-electricity-theft alarm, prepayment control of electric charge and other functions to circuit, there is air circuit breaker that is used for breaking loads in the switch chamber; reactive compensation chamber is equipped with multi-stage dynamic reactive power compensation device that is of surgefree and long service life, which realizes compensation mode of voltage zero crossing switch in and current zero-crossing switch off, will not produce over voltage, it is able to realize multi compensation modes of three-phase equilibrium, three-phase separation, three-phase separation + equilibrium and so on. As it integrates the functions of electric energy metering with load breaking reactive compensation, it is of great advantage to realize automated control, and is convenient for installation, it cuts down the investment, is propitious to be popularized. This integrated distribution cabinet complies with the standards GB/7251.1-2005, GB/15576-2008 and so on.
Technical feature：
Equipped with high-precision metering devices.
It has the function of reactive power compensation.
High integration improves the operation efficiency .
It is equipped with a comprehensive protection device.
Main technical parameters:
Current transformer part of distribution box：
Switch part of distribution box：
Reactive compensation:
Outline and installation dimensions:
Q:What is a power distribution cabinet?
A:A power distribution cabinet is an electrical device that receives and distributes electrical power. It houses various electrical components like circuit breakers, switches, and fuses. Its main functions include power distribution, controlling the flow of electricity, and protecting electrical equipment and circuits from over - current, over - voltage, and other faults....
Q:What is a DB cabinet?
A:“DB cabinet” usually refers to a Distribution Board cabinet. It's an enclosure that contains electrical switches, fuses, and other components. Its role is to receive electrical power from a main source and distribute it to various sub - circuits or loads in a building or facility. It helps manage and protect the electrical distribution system, preventing overloads and short - circuits....
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Related Knowledges
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Main Transformer Accidents and Light Gas Operation Issues1. Accident Record (March 19, 2019)At 16:13 on March 19, 2019, the monitoring background reported a light gas action of No. 3 main transformer. In accordance with the Code for Operation of Power Transformers (DL/T572-2010), operation and maintenance (O&M) personnel inspected the on-site condition of No. 3 main transformer.On-site confirmation: The WBH non-electrical protection panel of No. 3 main transformer reported a Phase B light gas action of the transformer body, and the reset was ineff02/05/2026 -
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026
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