Local Compensation Device for Low-Voltage End
Short Description:
The KRTBBM series low-voltage terminal local compensation device uses a microprocessor as the control core to automatically track and monitor the system's reactive power. The controller uses reactive power as the control variable to fully automate the control of capacitor switching actuators, responding promptly and quickly. It provides good compensation performance, reliable operation, and eliminates overcompensation that could harm the power grid, as well as shocks and disturbances during capacitor switching.
Product details
Product Overview
KRTBBM series low-voltage unfinished in-situ compensation device products use microprocessor as the control core to automatically track and monitor the reactive power of the system; The controller takes reactive power as the control physical quantity, and automatically controls the capacitor switching actuator, with timely and rapid response, good compensation effect, and reliable work, which eliminates the overcompensation phenomenon that endangers the power grid and the impact and disturbance phenomenon when the capacitor switches.
The intelligent low-voltage line reactive power automatic compensation device, designed according to the nature of the load, can increase the system power factor from about 0.65 to more than 0.9, increase the transmission capacity of transformers and lines by more than 15~30%, reduce line loss by 25~50%, and achieve the good effect of stabilizing voltage to improve power quality and reduce power supply costs.
Basic features
1. Reactive power compensation
The sampling physical quantity is reactive power, no switching oscillation, no compensation stall area, according to the needs, different combinations of Y △ are used to compensate the power system, so that the power factor is increased to more than 0.9.
2. Operational protection
When the voltage of a certain phase of the power grid is overvolted, undervolted, and harmonic over-limited, the compensation capacitor is quickly removed.
When the power grid is out of phase or the voltage imbalance exceeds the limit, the compensation capacitor is quickly cut off, and the alarm signal is output.
Every time the power is turned on, the measuring and control instrument performs self-test and returns to the output loop, so that the output loop is in a disconnected state.
3. Display
The power distribution integrated measurement and control instrument adopts a 128X64 backlight wide-temperature LCD display, which can display the relevant parameters of the power grid in real time and intuitively display the preset parameters.
4. Data collection
Three-phase voltage knife current/lat rate factor
Active power knife reactive power
Active electric energy knife reactive electric energy
Frequency knife harmonic voltage/regular wave current
The daily voltage knife current is large and small
Power outage time/health power moment
Cumulative outage time
Voltage exceeds the upper and lower limits//phase time
5. Data communication
It has RS232/485 communication interface, and the communication method can be on-site or remote acquisition. It can realize timed summoning or real-time summoning, respond to the modification of preset parameters and remote control.
Technical parameters
Rated voltage: 380V three-phase
Rated capacity: 30, 45, 60, 90 kvar, etc. (can be determined according to different needs of users)
Order compensation method: three-phase balanced compensation type; three-phase split-phase compensation; Three-phase separation and balance combination
Compensation type (appropriate fixed compensation can be added according to user needs)
Control physical quantity: reactive power
Dynamic response time: mechatronics switchgear ≤0.2s electronic switchgear≤ 20ms
Allowable Offset of Working Voltage: -15%~10% (Factory Overvoltage Setting: 418V)
Protection functions: overvoltage, undervoltage, phase loss (using PDC-8000 power distribution integrated measurement and control instrument also has the functions of undercurrent, harmonic over-limit, voltage imbalance over-limit and so on)
Automatic operation function: power outage exit, delayed 10S automatic recovery after power transmission.
