GGJ type low-voltage reactive power compensation

GGJ type low-voltage distribution reactive power compensation comprehensive cabinet is a new type of outdoor power distribution reactive power compensation comprehensive cabinet designed in line with the principles of safety, economy, rationality and reliability. It is suitable for urban network, rural grid transformation, industrial and mining enterprises, street lamp lighting, residential communities, etc. in the distribution system of AC 50Hz and rated voltage of 380V, with power distribution, control, protection, reactive power compensation, power metering and other multi-functions, the new outdoor comprehensive distribution box with power distribution, control, protection, reactive power compensation, power metering and other functions, and can add leakage protection functions according to user requirements. The product has the advantages of novel structure, reasonable structure, high protection level, convenient installation and commissioning, maintenance and overhaul. The product complies with GB7251.1-1997, GB/T15576-2008, and has passed the 3C certification, which is an ideal low-voltage complete set of equipment in the current power grid transformation.

Product model and meaning

G-AC low-voltage distribution cabinet, G electrical components fixed installation, fixed wiring, J-electrostatic capacitors.

GGJ series outdoor power distribution reactive power compensation integrated cabinet is suitable for power distribution, metering, protection and automatic compensation of reactive power at 0.4kV voltage level.

2. Product features

GGJ series low-voltage reactive power compensation cabinet is composed of cabinet, isolation switch, fuse, switching capacitor contactor, thermal overload relay, power capacitor and intelligent reactive power compensation controller, etc., and the cabinet is a closed structure.

3. Main performance

1. Timely and rapid response, good compensation effect, reliable work, and leakage protector can also be added according to user needs.

2. Protection function: overvoltage, overload, undervoltage, undercurrent, short circuit and other functions

3. Operation mode: It has two working modes: automatic operation and manual operation.

4. It can increase the power factor of the power grid to more than 0.95

4. Operating conditions

1. Ambient temperature: -20°C~+50°C

2. Air relative humidity: ≤90% (relative ambient temperature is 20°C~25°C)

3. Altitude: no more than 2500m

4. Environmental conditions: suitable for indoor (inside the box) installation, not suitable for fire, explosion hazard, serious pollution, chemical corrosion

and the place where the violent vibration occurred.

5. Installation position: the inclination perpendicular to the ground should not exceed 5º

5. Technical parameters:

1. Rated voltage: 380V

2. Rated frequency: 50Hz

3. Compensation method: three-phase compensation and single-phase compensation combined.

4. Compensation capacity: 60kvar~390kvar.

5. Compensation method: cyclic switching, encoding switching, fuzzy control automatic switching.

6. Control physical quantity: reactive power or reactive current

7. Fastest response time: ≤20ms

6. Installation and commissioning

1. Check before installation

Check whether the equipment is intact, whether the random information and accessories are complete, and contact the manufacturer in time if you find any problems.

2. Inspection and experiment before power-on

After the product is installed, the following items need to be inspected and tested before it is put into operation.

1) Check whether the cabinet is dry and clean.

2) Whether the operating mechanism of the electrical components is flexible, there should be no jamming or excessive operating force.

3) Whether the on/off of the main electrical components is reliable and accurate, and whether the on/off of the auxiliary contacts is reliable and accurate.

4) Whether the ratio and polarity of the instrument indicate and transformer are correct.

5) Whether the bus connection is good, and whether its insulation supports, mounting parts and accessories are firm and reliable.

6) The insulation resistance should not be less than 10 megaohms when measuring with a 500-volt megaohm meter, and electronic devices, capacitors and current-consuming devices such as coils should be disconnected when browsing.

3. Power-on debugging

Debugging of automatic reactive power compensation controller

The controller has been adjusted according to the relevant standards for input, cutting threshold, delay time, and overvoltage threshold, and if it needs to be re-adjusted, please adjust it according to the instructions for automatic reactive power compensation controller.

7. Precautions for use and maintenance

1) The operation, maintenance and overhaul of the product must be carried out by qualified electrical personnel.

2) During maintenance, the power supply should be disconnected first, and then repaired after the compensation capacitor is discharged.

3) Perform regular repairs.

5) If the main switch of the integrated distribution box selects the knife switch, the knife switch must be split and closed in the case of no load to ensure personal safety.

6) If the user chooses a comprehensive distribution box with a reactive power compensation device, the automatic reactive power compensation controller in the product should be operated and inspected in strict accordance with the instruction manual.

8. Shape and installation size