Three Phase Compensation Intelligent Integrated Low-Voltage Power
Capacitor
Code and implication
Technical parameters
Rated voltage: AC400V (deviation≤±10%,
Sine wave total distortion rate <5%)
Rated current: AC0~5A (current harmonic <10%,
current input impedance ≤0. 02Ω)
Operating freq: 50Hz; Standby power: <0.5W
Voltage≤0. 5%; Current≤0. 5%; Power≤0.5%;
Power factor ±0. 01%; Temperature ±1℃;
Time≤100ms
- Data of connecting with system
Maxi qty connected with system: ≤99PCS;
Initialized time of connecting with system: ≤10s
- Ambient operating conditions
Ambient temperature: -30~+60℃
Relative humidity: 90%RH (No dew at 20℃)
- Parameter of reactive power compensation
Interval between switching on/off: single piece ≥20s
(increase if more pieces operated together)
Maxi capacity of single capacitor:
three-phase compensated together (30+30) kVar;
three-phase compensated respectively 30kVar;
Capacitor attenuation rate: ≤0. 5%/ year,
failure rate: ≤5%/year (servicing 6000h)
Permissible switching times: 106;
protective breaking capacity: 120KA.
Comm.port: RS485
Performance and Feature
- Intelligent monitoring system
Acquisition of current, voltage, rely on 32-bit plug-in type MCU
made by ST America,which can perform quick sampling,the transfer
time of 12-bit AD need1uS only,these can realize high accurate
measurement and calculation of 3-P current, 3-pvoltage, 3-P active
power,reactive power,transparent power and etc,calculation and
analysis of harmonics.
Monitor is LCD with 128X64 matrix, Chinese language,display the
time,inside temperature,current,voltage,harmonic parameters at real
time, check other parameters,operation status through keys,also the
values of over-voltage,under-voltage,under-current,
over-temperature,over-compensation can be set and saved,data not
lost in case of power failure.
- Intelligent connection with power system
The product provides RS485 port,built-in MODBUS.RTU
protocol,compatible with DL645-2007 protocol,able to perform remote
monitoring and controlling. When more than one product connected
with system,they will have one master machine among them
automatically.others as slave machines,become automatic control
system of reactive power compensation, any of individual one has
fault,it will stop running, does not influence on others
operating;if the master machine has fault and out of operation,they
will produce new master machine automatically,form a new system.
Hi-performance dry type cylinder-shaped self-healing power
capacity,has the merits of well radiation,small size,long service
life,ensure the safety and reliability.
The general switch cooperated with high breaking fused disconnector
is able to break 120KA short circuit current,large break
position,to ensure the product able to isolate from system quickly
and safely.
Wiring
1. The two shall be connected according to the power supply and
load sign on the leakage breaker and shall not be reversed.
2. The protection line shall not pass through the zero-order
current transformer. When the three-phase five-line system or the
single-phase three-line system is adopted, the protection line must
be connected to the protection main line at the inlet end of the
leakage circuit breaker, and shall not pass through the zero-order
current transformer midway.
3. Single-phase lighting circuit, three-phase four-line production
and distribution lines, and other lines or equipment using the
working zero line, the zero line must pass through the zero-order
current transformer.
4. In the system with the direct grounding of the neutral point of
the transformer, once the leakage circuit breaker is installed, the
working zero line can only be used as the working zero line after
passing through the zero-order current transformer, and the
grounding cannot be repeated or connected with the working zero
line of other lines.
5. The electrical equipment can only be connected to the load side
of the leakage circuit breaker, and do not allow one end to be
connected to the load side, while the other end is connected to the
power supply side.
6. In the lines with the single-phase and the three-phase load
mixed under the three-phase four-line system or the three-phase
five-line system, the three-phase load should be balanced as far as
possible.
Common fault
Put into the trip
1) The three-phase power line, including the zero line, does not
cross the zero-order current transformer in the same direction, and
the wiring can be corrected.
2) The leakage circuit breaker and the unleakage circuit breaker
are electrical connected, and the two circuits can be divided.
3) There is a fire load in the line, so that such a load can be
eliminated.
4) Work zero line through the zero-order current transformer has
repeated grounding phenomenon, and repeated grounding shall be
eliminated.
5) The leakage circuit breaker itself has a fault, and should be
replaced.
