Scope
HXGN17-12 box-type fixed ring network cabinet for three-phase, AC 50 (60) Hz, rated voltage 3 - 12kV, rated current 630A and below the system's power distribution unit. Mainly applicable to industrial and mining enterprises as well as power distribution system by the electric box-type substation, feeder and implement controls to protect, monitoring. Particularly suitable for frequent operation of the occasion, the bus system as a single bus structure. With the realization of "Five Anti" lockout feature.
Normal environmental conditions
Altitude: 1000m the following areas; 1000-3000m above sea level to be considered in regional correction factor,
Installation site indoor, indoor temperature: -20 ℃ ~ +40 ℃,
Ambient temperature: natural weather environment temperature -40 ℃ ~ +40 ℃,
Operating ambient air temperature: -20 ℃ ~ +40 ℃
24 hours average temperature: not higher than +35 ℃,
Relative humidity (at 25 ℃): on average: less than 95% on average: less than 90%, no significant air quality, dust, smoke, corrosive or flammable gases, vapor, or salt pollution.
Electrical performance
Switchgear ratings
Rated voltage: 12 kV
Rated frequency: 50 Hz
Rated current: 400A 630A
Rated short time withstand current (3S): 20KA 31.5KV
Rated peak withstand current: 50KA 63KA
Rated short-circuit making current: 50KA 63KA
Fuse breaking current: 31.5KA
Insulation level
Frequency withstand voltage (1min): ground and white 42 KV
An isolated fracture between 48 KV
Rated lightning impulse withstand voltage 75 KV on the ground and white
An isolated fracture between 85 KV
Auxiliary circuit and control circuit (two returned Road) frequency withstand voltage of 2 KV
Creepage distance 2.0cm/kv
Mechanical life
Mechanical life meet GB3309 - 1989 section 5 and GB3906-1991 section 7.6.3 of the regulations.
Protection class
Enclosure rating IP3X.
Bus voltage control
Control bus voltage DC220V, DC110V, AC220V, DC220V
Cabinet Dimensions
W × D × H = 650 (850) × 950 × 2000 (2200)
High Voltage Switchgear electrical components within the model, parameters and layout dimensions and other requirements are engineering drawings and ordering agreement shall prevail.
High-voltage switch cabinet structure
The metal-enclosed switchgear for the box-type structure, the cabinet frame of KS (8MF) profiles processed from the cabinet structure used in all assembly, light and beautiful, can be any combination of installation, ease of unlimited expansion of extension.
Cabinet can be equipped with FN12-12-type compressor type load switch combinations, can also be equipped with FN25-12 vacuum load switch combinations, small size, maintenance-free, three linkage structure, and a clear separation fracture.
With FN12-12-type compressor type load switch combinations, FN25-12 vacuum load switch combinations, its installation flexible, left, right equipment, dress, flip.
Can be manual and electric operation, and has a remote control function.
With comprehensive and reliable mechanical linkage, interlocks, fully meet the "Five Anti" function.
Using linkage protective insulation valve, block live contact, to ensure personal safety.
More positive operation and maintenance, side door with observation windows can clearly observe the working status of cabinet components.
Factory inspection, testing and on-site inspection
Structural inspection
Products, parts, components, its size and shape, surface coating, etc. shall meet the design requirements.
Product of one or two programs, the wiring connection is correct, craft beautiful, cabinet components shall meet their own standards and technical conditions.
Mechanical characteristics and mechanical operation of the test
Switching cabinet reliable and flexible. Interlock device meet the design requirements.
Frequency withstand voltage test
Main circuit 1min power frequency withstand test voltage to ground, one white isolation fracture 48 KV 42KV
Auxiliary circuit (control circuit) 1min power frequency withstand test voltage of 2 KV
Main circuit resistance test
With different rated currents on the value of the main circuit breaker cabinet for resistance measurement, the measured resistance value should not exceed the values listed in Table 1.
Auxiliary electrical device test
Of the auxiliary circuit (control circuit) for power transmission operation of the test, the protection devices are reliable and correct action, in line with the electrical drawings.
Acceptance test project
a. In accordance with order data matching cabinet installation drawings of electrical components models, specifications, quantities are matched;
b. Check for loose fasteners, find loose should be tightened;
c. Check the bus connections, contacts are tight and, if exposed, should be repaired;
d. manual isolating switches, circuit breakers, mechanical interlocking procedures 3 to 5 times, the phenomenon should be flexible and not stuck, and the action should be accurate, the program is correct;
e. Check the circuit breaker, isolating switch of the mechanical properties are suitable for their own requirements, circuit breakers need to press the maximum voltage, low voltage operation of the test, combined points should be normal;
f. Check whether the secondary wiring drawings, in the case of the main power circuit is not energized the movement of the secondary circuit test, the second diagram should be consistent with the requirements;
g. the main loop resistance measurement, because many of the switchgear solutions, the relative resistance to be determined, the tentative site for the measurement of electrical connectors and circuit breakers, circuit breaker does not exceed its standard value, the electrical connection terminals should not exceed 1uΩ, DC voltage drop measurement method, through to 100A DC current, measuring the voltage drop;
h. secondary circuit insulation strength test, between the conductor and the shell, applied 50Hz, voltage 2000V, which lasted 1min, no breakdown should discharge phenomenon, the secondary circuit in electronics parts, test voltage by the manufacturer and user agreement.
i. acceptance test, the main circuit power frequency insulation voltage test, and in relatively white, applied AC 50Hz, rated voltage switchgear according to according to GB311 · 1 ~ 1997 the provisions of Article 6.6 of the value should be no breakdown flashover.
Operational preparation
a. Turn the control, signals, lighting and other power;
b. In isolation, circuit breakers and other states in the sub-gate, to the main bus transmission, which means that the progress line circuit breaker cabinet;
c. Close the cabinet with the switch voltage transformer isolation switch, check the voltmeter indication is correct, if the right to continue down
Carried out;
d. Close the arrester, transformer station and ancillary electrical isolation and put into operation;
e. closing the feeder circuit breaker in order to check meter is correct.
Maintenance and repair
Switchgear put into operation, monitoring and maintenance are as follows:
a. observe the electrical connection at the main bus and the bus, the bus is found to be overheating repair discoloration;
b. observe the lighting, control, signal power is normal power supply;
c. Record the circuit breaker operating times;
Maintenance
Switchgear maintenance, faulty maintenance and periodic maintenance, troubleshooting is to prevent the failure to expand the operation and prevent accidents in the
Concluded that the presence or imminent failure, immediately repair the fault location, timely troubleshooting.
Regular maintenance, according to the provisions run on time, repair as follows:
a. Clean all parts of the dust, especially the insulation surface dust;
b. repair locks and mechanical interlock program, maintain a flexible and reliable operation, the program is correct;
c. Press the circuit breaker, disconnecting switch, operating mechanism and other electrical requirements for maintenance, commissioning;
d. Check the electrical contact area, exposure is good, detect ground loops, maintain continuous conduction;
e. Tighten the screws, pins.
Product operation, inspection and storage
Products by factory inspection before packaging and shipping, packaging, product boxes bolted to the bottom sit. Transport process, not restricted to upright inverted, tipping, rolling, fall. By packing list on the machine, accessories for acceptance.
Custody
Product before installation, should be stored in the warehouse in original packaging, if not storage rooms, should prevent the rain, to prevent damp;
May not disassemble electrical components and parts.
Installation, adjustment
Installation
Circuit breaker in the closing minutes when the dynamic load generated, up, down approximately 7840N, this data provides the basis of the design basis for estimating the stress.
Installation procedures and precautions
a. The switch cabinet according to the order placed, based on the adjusted into a group of switchgear straightness, squareness, level, and then use M12 bolts or welding methods to tighten the switchgear on the base channel;
b. The M12 × 30 bolt connection between the cabinet;
c. Install the main bus, open bus room to install the top cover plate, tighten the cover after installation, connect the bus when the contact surface should be smooth, free of dirt, dirt should be in addition to the net, painted neutral vaseline oil;
d. Install a cable, the cable after the first production, the cable head fixed on the bracket, cable and bus bar contact surface should be smooth, contact surface coated with petroleum jelly immediately after the neutral connection and fastening of the cable construction finished application partition the room with the cable channel cable packer;
e. Connect cabinet indirectly bus, so arranged along the direction of fused switchgear, and protective earth grounding inspection whether there are any omissions, whether continuous conduction ground loops, grounding resistance should be less than the work 1000uΩ, protective earth resistance of less than 4Ω;
f. Install the secondary circuit cable, cable penetration by the institution on the left end, the relay along the wall into the room, points received corresponding terminal block, cable construction should pay attention to numbers, terminal numbers do not leak through, or wearing the wrong, after construction of the second cable, pay attention to forget the cover cable holes.
Ordering Information
Main program code and in-line system wiring diagram, Pareto chart and floor plan
Auxiliary circuit diagram, terminal layout map, if not terminal layout diagram provided by the manufacturer
Electrical switchgear components, models, specifications, quantity
Main bus, the bus branch materials, specifications, or supply provided by the manufacturer
Should be required to provide bus bridge span and height
Required attachments, type and quantity of spare parts should be made
Switchgear used in special environmental conditions should be made in order
