Product Overview
JP type low-voltage comprehensive compensation distribution cabinet is a new type of low-voltage comprehensive compensation distribution cabinet developed by Jiangxi Yikai Electric Equipment based on the technical requirements for power transmission in the power system and combined with many years of practical experience in developing and producing power equipment. It is a new type of low-voltage comprehensive compensation distribution cabinet for electric power. Specially designed for departments and power users, it is a modern new product that integrates protection, measurement, measurement, compensation, communication, and lightning protection. It can provide indirect contact protection when the human body gets electric shock; it can also effectively compensate for reactive power, improve power quality, and reduce losses. It is an indispensable energy-saving device. At the same time, this equipment can provide power distribution operation data, providing a complete set of scientific basis for formulating economical and safe power operation plans and equipment capacity expansion.
1. Purpose
JP cabinet low-voltage comprehensive compensation distribution cabinet is mainly used for leakage, overload protection, lightning protection and reactive power compensation of low-voltage power grids to improve safe power consumption and power factor of the power grid, reduce line losses and improve power quality. This series of low-voltage comprehensive compensation distribution cabinets takes an intelligent reactive power controller as the core, uses non-contact capacitive switches or capacitive contactors as switching devices of the capacitor bank, and automatically switches capacitors according to the power factor of the power grid to ensure The power grid always has a high power factor. The compensation components of the JPS3 type low-voltage comprehensive compensation distribution cabinet are capacitors, which can be used in situations where harmonics are not high; the compensation components of the JPS31 type low-voltage comprehensive compensation distribution cabinet are also capacitors, but they can be divided according to the load status of each phase. The compensation components of the JPS H-type low-voltage comprehensive compensation distribution cabinet are composed of capacitors and reactors connected in series. They have harmonic suppression functions and can be used in situations with high harmonics.
2. Conditions of use
1. Ambient temperature: -30℃～52℃.
2. Relative humidity: no more than 90%.
3. There is no corrosive gas, no conductive dust, and no flammable or explosive media in the surrounding environment.
4. Altitude: no more than 2500m.
5. There should be no severe vibration or bumps at the installation site, and the installation inclination should not be greater than 5 degrees.
Note: If there are special environmental usage conditions, please consult with our company when ordering.

3. Implementation of standard
ICE439 "Low-voltage complete switchgear and control equipment"
GB7251 "Low-voltage complete switchgear"
GB3983.1-89 "Low-voltage shunt capacitor"
GB12747-91 "Self-healing low-voltage shunt capacitor"
DL/T597-1996 Technical conditions for ordering low-voltage reactive power compensator
GB/T15576-1995 Low-voltage no General technical conditions for power static compensation device
DL500-92 Technical conditions for ordering voltage monitors
GB9466-88 Basic test methods for low-voltage complete sets of switchgear
GB1497-85 Basic standards for low-voltage electrical appliances
GB1208-1997 Current transformers
GB4942.2-85 Protection levels of low-voltage electrical appliance enclosures
4. Structural features
1. The main components inside the comprehensive compensation distribution cabinet include leakage protectors, capacitors, reactors (JPS H type), knife fuse switches (or knife switches, choose one), fuses (or small circuit breakers), contactors (or It is composed of silicon controlled thyristor (composite switch), controller, etc.; JPS H-type reactive power compensation cabinet can be modularized according to user requirements. The module integrates capacitors, reactors, fuses and contactors, with compact structure and novel layout. .
2. There are power factor meters, ammeters, voltmeters (or power indicator lights, choose one of the two) on the panel of the cabinet to facilitate real-time observation; there is a fan (optional) for heat dissipation on the top of the cabinet, which is controlled by a temperature control switch , there is a manual/automatic switch for controlling the fan on the panel.
3. The cabinet is made of high-quality cold-rolled steel plate or stainless steel plate, which has good flatness. The outer surface is spray-painted (stainless steel plate is optional) and has strong anti-corrosion ability; the internal frame is made of galvanized steel plate, aluminum-zinc-coated steel plate or stainless steel plate (optional). selection) to ensure better conductivity and corrosion resistance. 
4. Complete protection functions: short circuit, overload, overvoltage, undervoltage, phase loss, residual current (leakage), neutral line broken on the power supply side, etc.; each parameter is easy to set; it automatically exits when an external related fault occurs operation, and automatically resumes operation after power is supplied (the main switch has an automatic reclosing function).
5. Technical parameters
1. Rated voltage: 220V, 380V (400V), 660V
2. Rated frequency: 50Hz
3. Rated compensation capacity: 4～600kvar
4. Operating voltage range: 0.8～1.1Un
5. Capacitor wiring mode: "△" or "Y".
6. Measurement error: Voltage: 0.5% Current: 1.0% Reactive power: 1.0%.
7. Switching mode: three-phase automatic switching (JPS 3 type), split-phase switching (JPS 1 type), three-phase single-phase automatic switching (JPS 31 type).
8. Switching delay: adjustable from 1 to 999 seconds.
6. Typical model technical data and overall dimensions
1 Basic electrical parameters
                                 JPS series comprehensive compensation distribution cabinet reference technical parameters

Note: The overall dimensions listed in the above table are the company's regular dimensions and can be appropriately changed according to the different components installed and the needs of the user.

2 Main working principle
JPS series low-voltage comprehensive compensation distribution cabinet uses residual current-operated circuit breakers to provide indirect contact protection against personal electric shock hazards. It can also protect against ground faults, over-current, short circuit, under-voltage and other hazards in circuits or electrical equipment. Protection against phase loss and broken neutral line on the power supply side.
The automatic reactive power compensation controller installed in the cabinet acts to automatically control the input and removal of parallel capacitor banks in the cabinet, keeping the reactive power consumption of the power grid at a minimum, thus improving the voltage quality of the power grid and reducing the losses of the transmission system and transformers. . Due to the random nature of power loads, the three-phase loads, especially the reactive loads, are not always balanced. The power factor of a certain phase load is close to 1 while the power factor of another phase is very low. JPS D device Precision step compensation can be performed on each of the three phases in units of 1 to 3 kvar, that is, single-phase reactive power compensation.
  
Dimensional drawing