Basic Info.
Voltage Level
Low Voltage
Transport Package
Support Sea Freight & Land Freight
Specification
1200 x 1000 x 2200mm
Product Description
Product Standard
IEC 44 : Part 1 : Specificationfor current transformers.IEC 255: Electrical relays.
IEC 269: LV fuses.
IEC 289: Reactors.
IEC 529: Degrees of protection provided by enclosures (IP Code).
IEC 831: Shunt power capacitors of the self healing type for a.c. systems having rated voltage up to and including1 kV.
IEC 947 : Low-voltage Switchgear and control gear
BS 381C : Specification for colors for identification, coding& special purposes.
BS 1361 : Specification for cartridge fuses for a.c. circuitsin domestic and similar premises.
BS 3382 : Specification for electroplated coatings on threaded components.
BS 3692 : Specification for ISO metric precisionhexagon bolts, screws and nuts.Metric units. (ISO272)
BS 6231 : Specification for PVC-insulated cables for switchgear and control gear wiring.
Technical Parameter
1.General system design data |
Nominal system voltage | kv | 0.4 |
System earthing: 0.4 Kv | | Solidly earthed |
Rated frequency | Hz | 50 |
a. Impulse withstand voltage at 1.2/50 μs | kv(peak) | 8 |
b. One minute power frequency withstand voltage dry | kv | 3 |
X:R ratio | | |
Maximum site ambient temperature | ºC | 55 |
Minimum site ambient temperature | ºC | -10 |
Maximum site relative humidity at 30ºC | % | 80 |
Site altitude | m | >1000 |
Maximum site solar radiation | W/ m2 | 1100 |
Site pollution conditions (IEC 815): | | Class 3 |
2.Design data for LV capacitors. |
IEC Standard | | 831 |
Capacitor Bank kvar ratings | kvar | 140 as specified in schedule A |
Enclosures doors with the door closed | | IP 43 |
Rated voltage | | 0.4±20% |
Rated nominal voltage Un | | 0.4kV±10% |
Insulation level for 1 min | kv | 2 |
Capacitor Type | | Dry, self healing. |
Short circuit level for 1 second | ka | 50 |
Continuous over-voltage | | 1.0 Un |
8h over voltage (in any 24 h period.) | | 1.1 Un |
30 min over voltage (in any 24 h period.) | | 1.15 Un |
5 min over voltage (in any 24 h period.) | | 1.2 Un |
1 min over voltage | | 1.3 Un |
Continuous over-current | | 1.3 times normal rated current. |
Load indication | | Provision |
CT secondary | A | 5 |
CT ratios | | to suit primary current rating. |
Capacitor protection | | Fuses & un-balance protection |
Gland plates | | un-drilled |
Incoming cable entry | | From two sides and bottom |
(1)Capacitor Bank arrangement.
The capacitor equipment, unless being supplied in the LV distributionsection of a Package Substation, It is mounted in a free standing enclosure designed for indoor/outdoor use. Thescope of supply include, but not be limited to, the following:
a) Capacitor units, comprising several capacitor elements connected in a three phase arrangement enclosed in aluminum case, with their terminals brought out.
b) MCCB
c) Switching devices to connect the capacitor sub-banks to the supply. The switching of the capacitors are in response to the changing reactive load.
d) Reactive power regulator and controller and associated cabling.
e) Protection equipment and all associated cabling.
f) All CT's required to implement the scheme.
g) All primary and secondary cabling.
(2)Capacitor Elements
The capacitors elements are preferablybe wound from a metallized polypropylene film dielectric to produce a dry type cell. The wound dielectric/electrode coil is contained within a suitable case with wired out connections. The case is flexible to accommodate changes in the internal pressure.
(3)Capacitor Units.
The single capacitor elements are assembled into delta connected groups of 3, as many groups of 3 capacitors being connected to achieve the required capacitance of the capacitor unit. The assemble group of capacitor elements are contained within aluminumcase with the terminals brought out through bushings. The bushings are of well processed porcelain or cast resin, approved for outdooruse at continuous voltage, and hermetically sealed to the aluminum case. The terminals are heavily tinned and suitable for standard copper conductors. All capacitor units are provided with an insulating terminal cover.
The clearance between two capacitor units is not less than 5 cm.
Discharge resistors are connected across the external terminals, which suitably rated to drain the residual voltage to 50 volts within 60 seconds after the capacitor is disconnected from the supply.
(4)Moulded case circuit breakers.
If a Moulded Case Circuit Breakers (MCCB) is used as the mains supply isolator to the capacitor bank then it's circuit breaker mechanismsshall be of the tripfree pattern to prevent closing the breaker onto a faulty circuit, and engraved to indicate 'ON/OFF' position and rated current.
The MCCB ensure protection against circuit overloads and against short circuits bymeans of electronic protection thermal and instantaneous magnetic trips.
all MCCB can be adjustable to rated current of capacitor bank thermal protection adjustment range (0.5 ÷1 ) In
magnetic protection adjustment range (2 ÷ ≥ 10) In .
The MCCB have the feature to limit the fault current to the rating of the MCCB.
for capacitor banks rated at 140 kvar the rated current for MCCB 400 A , ICU ≥45 KA.
ICS ≥ 50% ICU for all MCCB.
(5)AC Magnetic Contactors.
Contactors used for power factor correction including limiting resistor to avoid inrush current
Contactors used for switching the capacitor sub-banks are designed to withstand the surge currents associated with capacitive switching.Means provided to prevent manual operationof the contactor. Terminals and contacts are shrouded to prevent inadvertent finger contact.
All switchgear and protective devices and their connections are capable of carrying continuously 1.5 times the rated capacity of the capacitor unit to which they are connected, inaccordance with IEC 831 section6.
Operating voltage for coil of contactors 220 v ± 10% .
(6) Reactive Power Regulator.
The capacitor banks are equipped with reactive power controller which will detect and measure the reactive power on the LV network and initiate a control unit to switch the appropriate number of capacitorsub banks in or out. There is a manual on/off push button provided which will take control of the sub bank to allow switching to be under operator control. Indication and push buttons for manual operationof each sub bank are provided.
The controller select the sub bank to be switched in and means provided to vary the duty cycle to ensure a reasonable distributionof switching operations between different sub banks.
The system is designed to minimize disturbance on the system and to avoid hunting. The controller is automatically switch off the capacitor bank in the event of loss of the 20 kV supply and be capable of restarting the capacitor bank automatically on restoration of thesupply.
v The regulator measures and display the following ( active,reactive power, current, voltage, harmonies, power factor, frequency, capacitive load, number of stage in service...…..).
v The regulator protects the capacitor bank if the harmonies is equal or more than ( 15 %).
v The regulator selects the suitable capacitor unit to put it in service with regardingto ( work's hours and the required reactive power).
v Operating voltage 380 V with suitable protection.
v Regulator can be adjustment automatic and manual.
v C/k automatic no need program.
v Adjustment range (0.8….1 inductive, 0.9…..1 capacitive) acc. to IEC 61010-1 .
v Adjustment for time operation for range (5 …. ≥ 240 sec)
v Regulator can put the stages in operationafter select the power factor( no need program)
v Power consumption from voltage circuit ≤15 VA .
v Starting current ≤ 20 mA
(7)Capacitor Bank Enclosure
Each enclosure is to be fully complete with front hinged and lockable access doors and have side mounted cable entry chamber for dry type cable entry from below.
The enclosure is to comprise folded steel panels appropriately welded to ensure a rigid design . If the enclosure is constructed of panels bolted to a weled steel frame, the frame must be hot dip galvanized to ISO 1461 to ensure long maintenance free life.
Main Structure
Low voltage 400V 50Hz AC capacitor bank Panel with APFC(Automatic Power Factor Correction) controller , 500 Kvar
No. | components name | model/specifications | unit | QTY | original |
0 | Floor standing metal enclosure, mm | 1000*800*2200 | pcs | 1 | |
1 | MCCB | BRM1-1250S/3300-1000A | pcs | 1 | Boerstn |
2 | MCB | BRB1-125/3P 100A | pcs | 10 | Boerstn |
3 | Capacitive contactor | CJ19-95/12 | pcs | 10 | Boerstn |
4 | capacitor | BSMJ0.45-50-3 | pcs | 10 | Boerstn |
5 | current transformer | BH-0.66 1000/5A 0.5 | pcs | 3 | |
6 | surge arrester | FYS-0.22 | group | 1 | |
7 | APFC controller | RPC3F-10 | pcs | 1 | |
8 | voltage selecting switch | LW12-16YH2/2 | pcs | 1 | |
9 | Ampmeter | 6L2-A | pcs | 3 | |
10 | Voltmeter | 6L2-V | pcs | 1 | |
11 | indication light | ND16-22 | pcs | 10 | |
12 | terminal block | URTK | pcs | 6 | |
13 | horizontal copper busbar | TMY-3*(80*6) | Kg | 12.82 | |
14 | neutral copper busbar | TMY-50*5 | Kg | 2.23 | |
15 | grounding copper busbar | TMY-50*5 | Kg | 2.23 | |
16 | branch circuit copper busbar | TMY-80*6 | Kg | 25.63 | |
17 | heat shrinkable tubes | | set | 1 | |
18 | aux.accessories | | set | 1 | |
Address:
Industrial Park (Yongkang Industrial Park), Fuzhou, Jiangxi, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Electrical & Electronics
Management System Certification:
ISO 9001, ISO 14001, OHSAS/ OHSMS 18001
Company Introduction:
Jiangxi Yawei Electric Co., Ltd., established in April 2012, is a high-tech enterprise specializing in the production and manufacture, scientific research and development, and product sales of intelligent complete sets of switchgear series substation equipment such as transformers, combined substations, high and low voltage switchgear, distribution boxes, JP cabinets, etc. The company is located in Chongren Industrial Park, Jiangxi Province.
The company covers an area of nearly 40000 square meters, with a registered capital of 10.06 million yuan and more than 120 employees. It is a separate enterprise after the reform of the former Chongren transformer factory. It has 45 years of transformer production history and strong technical force. There are 2 senior engineers, 3 senior engineers and nearly 20 technicians with intermediate and senior technical titles. Relying on domestic advanced technology, production and testing equipment, in accordance with the operation standard of ISO9001 quality certification system, the enterprise adopts computer-aided design to provide customers with environmental protection, energy-saving and low-carbon high-quality products in line with the characteristics of various regions, so as to meet the market and the root requirements of different customers.
At present, the company′s S11, S13 series 10kV oil immersed transformers; Scb10, scb12, scb13 series 10kV Grade grade epoxy casting dry-type power transformer; SH15, scbh15 amorphous alloy power transformer; Yb prefabricated substation; ZGS combined substation; High and low voltage switch cabinet; Outdoor ring network box; Distribution box; High overload transformer. The products have passed the quality inspection of National Transformer Quality Supervision and inspection center and national medium and low voltage transmission and distribution equipment quality supervision and inspection center The products have passed the national compulsory "3C" certification and environmental protection certification, and obtained the registration model registration certificate.
Relying on the strong strength of enterprises and "innovation is the foundation of development, quality is the basis of survival, integrity is the way of operation, management is the source of efficiency. " The company has been awarded high-tech enterprises, AAA level contract abiding enterprises, member units of Enterprise Credit Management Association, high-quality enterprises in Jiangxi Province, and product selection and promotion enterprises for national power grid construction and transformation.