1. POWER FACTOR CORRECTION
Low Voltage switchgear & control-gear assembly
Provided Customized manufacture
Whole solutions for design, assembly, test…
2006/5
Best solution for your power!
2. 1. Summary
1.1General
GCK-GGD-GCS version low-voltage switchgear and controlgear assembly, with its universal
expansion options and fixed installation, plug-in or fully withdrawable technology, is a modern,
secure solution with lasting value that can be used for all kinds of applications.
System solution for low-voltage power supply as well as automation and control systems, e.g. in:
■ Power plants
■ Computing and data centres
■ Hospitals
■ Companies in all industrial sectors
■ Water treatment plants
■ Office and administrative buildings
■ Airports and logistic centres
Standards and specifications
Switchgear manufacture
The switchgear complies with the following specifications in accordance with relevant IEC
publications:
• IEC1641/ IEC IEC60439-1 or EN60439-1/ GB7251.1-1997
Operating conditions
Normal operating conditions Design to relevant standard, with the following limit values:
• Ambient temperature:
–Maximum +40℃
–Maximum 24 hour average +35℃
–Minimum (according to “minus 5 indoor class”) –5℃
• Humidity:
–the average value of the relative humidity, measured over a period of 24 h, ≤95%
–the average value of the water vapour pressure, over a period of 24 h, ≤ 2,2 kPa
–the average value of the relative humidity, over a period of one month, ≤ 90%
–the average value of the water vapour pressure, over a period of one month, ≤ 1,8 kPa
• Maximum site altitude: ≤ 3000 M above sea level.
Special operating conditions
Special operating conditions are to be agreed on by the manufacturer and user.
The manufacturer must be consulted in advance about each special operating condition:
• Site altitude over 1000 m:
–Allow for the reduction in the dielectric strength of the air.
• Increased ambient temperature:
–Current carrying capacity is reduced.
–Provide additional ventilation for heat dissipation.
• Climate:
–Avoid the risk of corrosion or other damage in areas:
• with high humidity and/or with major rapid temperature fluctuations.
– Implement preventive measures (e.g. electric heaters) to preclude condensation phenomena.
3. 2. Overview of switchgear
1Switching section with open circuit breaker
Fixed installation and withdrawable technology
2Switching section with compact circuit breaker
Fixed installation and withdrawable technology
3LV HRC fuse-switch disconnectors
4LV HRC strip-type fuse-switch disconnectors
4. 5
Switching section for reactive power compensation
6
Outgoing feeder section for motor control centres – MCC
Fully withdrawable technology
7
Outgoing feeder section for customised expansion
8
Main bus bar system and corner section
2.1Features
Short-circuit resistance up to Icw 100 kA / Ipk 250 kA
Rated current up to Ie 6300 A
width Form 500mm up to 1200mm
Fault arc resistance 50 kA at AC 50 Hz 690 V / 60 kA at AC 50 Hz 400 V
Human and operational safety Highest level in confi guration 4b / Integration of fi eld
distribution bus bars, designed
without base points for arc fault protection, into the system
wall between equipment
and cable compartments
Standards According to IEC 61439-1 / DIN EN 61439-1/-2 / VDE
0660-1/-2
5. How can you be Energy
efficient?
3. Forword
Most utilities charge for peak electrical demand on each month’s electrical bill. The
demand charge is to allow the utilities to recoup part of their capital investment in the
distribution network they operate. Each customer pays a demand charge for its peak
operating load. Often inherent in the structure of these demand charges is an
allowance for some inefficiency but most utilities will offer an incentive to their
customers to keep efficiency (measured by power factor) high.
ower factor correction devices improve overall efficiency upstream of the point of
connection in the electrical network and can be used to minimize utility kVA
demand charges.
4. Reactive power compensation-GCK
General
The GCK series panel board range is a powerful and compact range consist of automatic capacitor banks that provide
the ideal power factor correction solution for industrial and commercial applications.
Main Features
• Voltage rating range from 208 V to 600 V
• Capacity available up to 1500 kVAR at 600 V
• Optional for thermal-protected iron-core reactors preventing network resonance
• Capacitor-switching rated contactor with proven reliability
• Sophisticated power factor controller options
• Backlit display for current power factor, stage status, load and reactive currents, etc.
Main components
Power factor controller
- Economic type
Menu-driven operation for monitoring, commissioning and configuring
• Automatic adjustment for current transformer polarity and phase sequence
• Automatic no-voltage release and automatic-staged reconnection
• A backlit display for:
ower factor, steps energized, step reconnection delay, real and reactive power, voltage THD, alarm codes and more
• Alarm relay and indication available for abnormal conditions
Note:
Controller R series is standard optional for normal system application.
6. - Advanced type
• Measurement of total current harmonic distortion
• Harmonic spectrum for current and voltage
• Step-condition monitoring (capacitance loss)
• On-line user help menus
• Alarm relay and indication for:
Low power factor, hunting, abnormal power factor, low voltage, over-capacitive, over-current, over-voltage,
over-temperature and excessive voltage THD
• Future optional RS485 Modbus® auxiliary communication module
Capacitor element
•The HQ (high-quality) protection system provides protection against
two types of end-of-life faults: high-current faults are protected by an
HRC cartridge fuse, low-current faults are protected by a combination
of the overpressure disconnect device and the HRC fuse.
• The unique, modular-cell design encapsulates the
elements in a plastic housing mounted on a molded plastic base.
The plastic materials minimize the chances of ground faults originating from the cells. Furthermore, the
design of the cells leads to better heat dissipation resulting in a cooler operation and longer life
Note:Capacitors with
various type with
good quality but
according to panel
seizes requirement.
Contactors
pecial contactors for application capacitive switching duty rated and designed to provide
performance and durability.
Note:
CJ series or equivalent type contactor is acceptable.
Iron core reactors
The iron core reactors in special requirement systems are custom-designed and manufactured under tight tolerances:
• Reactors are constructed with EI laminated low-loss magnetic
material and precision-controlled air gaps
• Three-phase windings consist of rectangular cross section, 220˚ C
(428˚ F) insulation for 115˚ C (239˚ F) rise with insulated all-copper
conductors
• Entire reactor assembly is impregnated and baked with high-
temperature thermo-setting epoxy resin to provide superior insulation
levels
• Each reactor has a thermistor embedded in the center leg and wired to thermistor relay. The
thermal protection system will shut down overheated stage affected by excessive harmonic
currents. Automatic reset is standard
7. 5. Specification for Reactive power compensation
Type Enclosed automatic capacitor bank
Capacitor dielectric Metalized polypropylene film
Internal connection 3 Phase, Delta
Tolerance on capacitance 0%/+15%
Discharge mechanism Polycarbonate resistor, one per phase
Discharge time One minute to less than 50 V
Expected life* 130,000 hours (nominal voltage and current), 0% THD (V)
Rated voltage (Un) 208 V, 240 V, 480 V, 600 V
Rated frequency 50/60 Hz
50 kA symmetrical at 600 V
Interrupting rating (maximum) 65 kA symmetrical ≤ 480 V
Continuous over-voltage 1.1 x Un
Continuous over-current 1.35 x In
Maximum recommended harmonic
current (Ih)
Maximum recommended harmonic
voltage (Vh)
1.05 x Ih
x Vh
Ambient temperature range -10℃ to +40℃ (+14°F to +104°F)
Highest mean over:24 hours +40℃ (+104°F)
Highest mean over: one year +30℃(+86°F)
Attitude ≤ 1800 meters (6000 feet) without de-rating
Note:* 5% reduction in rated kVAR near the end of life is typical.
6. Selection Guide Steps
Applying capacitors to a network containing highly cyclical loads or harmonic producing loads warrants
special considerations. The following information is normally needed:
• 12 months of utility billing information
• Location of utility metering
• A single-line diagram of the network showing nature of loads.
• Transformer(s) kVA rating, percent impedance (%Z), and primary and secondary voltages.
• Current and Voltage Harmonic spectrum (magnitudes for each harmonic frequency) or TDD*
and THD(V)** reading at point of the compensation
• Size and location of any existing capacitors
Note:*TDD-Total Demand Distortion, indices
to measure total harmonic current limit per
IEEE519.**THD(V)-Total Harmonic Voltage
Distortion, indices to measure total harmonic
voltage limit.
8. 7. Typical Applications
The applications for benefit
Applications Requirement Benefit
Power factor correction
Utilities impose power factor
penalty, if power factor below
target
Reduce power factor penalty
expense
Power factor improvement
Increase distribution system
capacity
Free up transformer capacity
without capital expenditure
Fast reactive power
compensation
Reactive power compensation
responds load fluctuation
Provide on-time reactive
power support
7.1 The typical applications reference SLD
Copyright 2014 Farady Electric
Zhejiang Farady Electric Co.,Ltd
TEL:0086-577-61722510/61777258
Fax:0086-577-61777257
Http://www.farady.cn
Email:info@farady.cn
Add:Su’ao,Liushi,Yueqing,Zhejiang,P.R.China, 325604
