300 Breaking Capacity Intelligent Integrated Low-Voltage Filtering
Power Capacitor
Technical parameters
| Ambient conditions | Ambient temperature: -25~55℃; |
| Relative temperature: 40℃, 20~90%; |
| Altitude: ≤2000m (give clear indications when placing an order if
there is any special situation) . |
| Power supply conditions | Rated voltage: -220V/~380V; |
| Voltage deviation: ±20%; |
| Voltage waveform:sine wave,total distortion rate not exceed 7%; |
| Rated frequency: 50Hz±5%; |
| Power consumption: <2W. |
| Electrical safety | Electrical clearance,creepage distance,insulation strength,safety
protection,short-circuit strength,sampling and control circuit
protection should all be in conformity with the corresponding
clauses of standard DL/T842-2003 Ordering specification for
low-voltage shunt capacitor installation. |
| Measurement error | Voltage: ≤0. 5% (within 80~120% of rated voltage) ; |
| Current: ≤1% (within 5%~20% of rated current) , |
| Power factor: ±1. 5%; |
| Temperature: ±1℃. |
| Protection error | Voltage: ≤0. 5%; |
| Current: ≤1%; |
| Temperature: ±1℃. |
| Time: ±0. 01s. |
| Reactive compensation parameters | Switching interval of capacitor: > 10s |
| (1s~10s customized) ; |
| Reactive capacity:common compensation≤40kvar, |
| separate compensation≤20kvar; |
| Online quantity: ≤120pcs. |
| Reliability | Control accuracy: 100%; |
| Permissible switching times: 200, 000 times; |
| Attenuation rate of running time of capacitor |
| capacity: ≤1%/year; |
| Attenuation rate of switching of capacitor |
| capacity: ≤0. 1%/ten thousand times; |
| Annual fault rate: ≤1%. |
| Model specification | Overall dimension (DxWXH) |
| Total compensation | 10kVar | 470x162x410 |
| 15kVar |
| 20kVar |
| 25kVar |
| 30kVar |
| 35kVar | 470x162x450 |
| 40kVar |
| Separate compensation | 5kVar | 470x162x410 |
| 15kVar |
| 20kVar |
| 30kVar | 470x162x450 |
Products overview
Intelligent integrated capacitors are mainly composed of power grid
parameter sampling, intelligent network, intelligent controller,
over-cast and cutting, power capacitor, line protection and other
units.Intelligent integrated capacitors are divided into upper and
lower split module structure, module assembly, disassembly is very
convenient.The upper module is composed of cutting switch,
intelligent controller, line protection, etc; the lower module
consists of table or two △ -connected or Y-connected power
capacitors.The intelligent integrated capacitor adopts modern
detection, power electronics, over-cutting, automatic control,
computer and network communication and other technologies, and its
composition block diagram is shown in Figure
Intelligent controller
Intelligent controller is the control core of intelligent
integrated capacitors, using high-performance, high-precision
TMS320C28x series processor DSP and low-power consumption,
high-performance STC89C53 microcontroller.The STC89C53
microcontroller obtains the three-phase voltage and voltage
parameters of the voltage and current transformer, filter circuit
and sampling circuit. The DSP calculates the reactive power Q,
power factor X, active power P, frequency f and capacitor value C
in real time. It controls the power operation parameters set by the
user to determine whether the capacitor group reactive compensation
is needed by the single chip.The microcontroller STC89C53 can
achieve high-speed data exchange with the processor DSP through
RS-485 communication to meet the real-time requirements of the
system.
Product function
It effectively suppresses high-order harmonic and surge,forms
low-resistance channel for high-order harmonic. It absorbs and
releases the harmonic,eliminates influence of high-order harmonic
to the capacitor,protects circuits and capacitors from
overload,prevents capacitors from super heating, insulating medium
from aging,avoids reduction of self healing performance,or
reduction of service life.
Matched with special capacitor switching switch,no switching surge.
- Separate-phase compensation
Capacitor of each phase of separate-phase compensation type product
can be switched separately,which improves the reactive compensating
accuracy,enables the three-phase reactive unbalance to be well
compensated.
Measurement of distribution voltage,current,reactive power,power
factor,automatic measurement and correction of CT phase and
change;measurement of three-phase current and inside temperature of
each capacitor.
Quick current switching and over-current protection of
circuit;over-voltage and under-voltage protection of
capacitor,over-temperature,open-phase and three-phase unbalance
protection of capacitor,when the temperature of capacitor exceed
65℃,the whole machine of capacitor would exit operation, which
improves its service life,and guarantees safety running of system.
Switching state,over,under and compensation state,over and
under-voltage state signals;protection operation type and
self-diagnose fault type signals.
Adoption of RS-485 communication coupling between capacitor and
controller,which is convenient for uploading of mass of sampling
data as well as information exchanging with external monitor
terminal, forms system work.
Functions of wire network communication and radio network
communication.
- Intelligent network control
It is able to detect and track the reactive variation of system
automatically,and switch in capacitor bank automatically. Carry out
switching circularly for capacitors with same capacitance,and carry
out switching according to the vacancy for capacitors with
different capacitance. The capacitor that is switched in earlier
should exit first,that exits earlier should be switched in
first;capacitor whose running temperature is lower should be
switched in first,whose running temperature is higher should exit
first;when the compensation situation is stable,the capacitors
should be switched in circularly every fifteen minutes,avoid long
time running of any one capacitor.
Intelligent control element of capacitor will carry out
self-diagnose to the running parameters of the body,once there is
self-inspection fault,the whole machine responses quickly and exit
running.
Outline and mounting sizes
