HXGN-12/630-20 Environmentally Friendly Air Insulated AC Metal Enclosed Switchgear Ring Main Unit

• Specification
• Technical Parameters

• The HXGN-12/630-20 environmentally friendly air-insulated AC metal-enclosed switchgear is designed by our company based on the development trend of the “intelligent and green grid” power industry, and at the same time meets the standardized design requirements of the State Grid. It has absorbed advanced domestic and foreign technologies and design concepts. Environmentally friendly switchgear independently developed on the basis of This product has excellent performance such as reasonable design, reliable power supply, compact structure, easy installation, flexible operation, small size, and high cost performance. It is suitable for power distribution systems with three-phase AC 50Hz and rated voltage 12kV: especially suitable for small secondary distribution stations. It is used to receive and distribute electric energy in power systems such as switch offices, industrial and mining enterprises, urban residential areas, airports, railways, tunnels, and high-rise buildings.

  Switch cabinet structure

  

   

  Switchgear Structural features

  1. Independent closed air box structure

  All medium-voltage live parts are installed in a fully enclosed stainless steel housing, and the protection level is reached, which absolutely guarantees the personal safety of the operator. It is not affected by small animals, saprophytic gases, moisture, condensation, dust and sun exposure; Rusty, no eddy current (cabinet body is 304 stainless steel).

  2. Dry air is insulated

  Using dry air as insulation medium, the product is more environmentally friendly, eliminating the use of SF6 gas and its pollution to the environment, the medium voltage part inside the air box adopts composite insulation, compact structure, small size, high safety and reliability, small and practical.

  3. Small vacuum interrupter design

  Using vacuum as arc extinguishing medium, miniaturized, low contact pressure vacuum arc extinguishing chamber structure design reduces the closing output work of the operating mechanism, improves the operational reliability and mechanical life of switchgear, and truly achieves 10,000 times maintenance-free.

  4. High personal safety

  The switchgear adopts fully insulated and fully enclosed structure design, and the protection level of the box body reaches TIP4x, and the protection level of the medium voltage live part reaches IP67. The switchgear non-transmission cable is connected by a touchable fully shielded plug-in cable head, designed with a reliable pressure relief device and a mechanical and electrical “five-proof” interlock. Intact man-machine operation interface. Prevent misoperation and ensure the personal safety of bombers,

  5. Spacious cable connection room

  The cable connection room space is large, suitable for parallel cable connection and additional lightning arrester, the cable connection plug is at the same height, the cable can be installed in parallel, and the height of the center of the cable outlet casing from the bottom of the box is 650mm.

  6. Flexible expansion mode

  The electrical connector mounted on the top ring side can be designed between the functional units, which can be reliably connected without other functional units and facilitate expansion. Each functional unit can be designed as a unit-type ring common box, and the maximum number of units can be 4 units common box.

   

  

  Integrated circuit breaker, PT (load switch) and three-station isolating switch, modular design, more convenient installation. Optimize the electric field design, the partial discharge is better, and the partial discharge of the whole machine is less than 1PC.

  Conditions of Use

  1. Ambient temperature: -45 °C ~ +45°C

  2. Humidity: daily average ≤ 95%; monthly average ≤ 90%

  3. Altitude: ≤ 4000 meters

  4. Earthquake resistance: 8 degrees5.

  The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV.

   

• S/N	Item	Unit	Data
  1	Rated voltage	kV	12
  2	Rated frequency	Hz	50
  3	Rated current	A	630
  4	Rated frequency withstand voltage (phase to phase, ground)	kV/1min	42
  5	Rated power frequency withstand voltage (vacuum, isolation fracture)	kV/1min	48
  6	Rated lightning impulse withstand voltage (phase to phase, ground)	kV	75
  7	Rated lightning impulse withstand voltage (vacuum, isolation fracture)	kV	85
  8	Rated short- time withstand current and duration (main circuit, grounding switch)	kA/4S	20
  9	Rated short-time withstand current and duration (ground loop)	kA/2S	17.4
  10	Rated peak withstand current (circuit, grounding switch)	kA	50
  11	Rated short circuit breaking current	kA	43.3
  12	Rated short circuit breaking current	kA	20
  13	Rated short circuit breaking current breaking times	times	30
  14	Rated operating sequence		0-0.3s-CO-180s-CO
  15	Out-of-phase ground fault interrupting current	kA	17.4
  16	times of ground loop closures	times	5
  17	Rated inflation pressure	Mpa	0.02
  18	Mechanical life (circuit breaker)	times	10000
  19	Mechanical life (isolating switch)	times	3000
  20	Gas box/casing protection level		IP67/IP4X

  Switchgear Merger plan

  

EKL4 Panel type short-circuit earth fault indicator for High Voltage Switchgear

• Specification
• Technical parameters
• Installation
• Ordering Information
• PDF download

• Panel type short-circuit earth fault indicator is supporting installation ring net switch in the power distribution network system, cable branch box, box changes. Used to indicate the corresponding cable segment of single-phase earth fault of short circuit and a real-time monitoring devices. Line fails, the staff can use indicator alarm indication, quickly determine the fault section, and find out the fault point. At the same item, the alarm fine real-time can be sent to the monitoring center server. In monitoring the computer screen shows a fault area and the specific location, guide the patrol personnel to quickly determine the fault section and find out the fault point. The indicators provide the best way to solve the problem of troubleshooting. To improve the work efficiency and shorten the blackout time, quickly restore power, improve power supply reliability and economic benefit, it is of great significance.

  Main function

  1. Short circuit alarming and indicating: Short circuit sensor measures the circuit at work,  when the electric current reaches or exceeds the setting value of the short circuit current when the short trouble takes place in the circuit, short circuit sensor send out the alarm signal, transmit to the indicator computer via the wire (the optic fiber) , after the indicator computer receives this signal, it produces the corresponding warning indicator signal.
  2. Earthing alarming and indicating: The earthing sensor measures the zero sequence current of the circuit at work, when the earthing current reaches or exceeds the setting value of the earthing current when the ground fault takes place in the circuit

  3. Low voltage alarming and indicating: The indicator adopts battery power supply, it will send out voltage signal when the voltage of battery is below normal working voltage 0v to remind workers to change battery. Low battery alerting function could separately indicate no less than 60 lasting days口earthing sensor will send out the alarm signal, transmit to the indicator computer via the wire (the optic fiber) , after the indicator computer receives this signal, it produces the corresponding warning indicator signal
  4. Reset automatically: After the indicating device sends out the alarm signal, if it was not reset manually, after the setting time, the indicating device can be reset automatically.
  5. Manual reset: After the indicating device alerts, operator could release the alerts through pushing ” resets / tests ” button on the indicator indicator panel after holding for 3 seconds.
  6. Automation: After the indicating device produces the corresponding warning indicator signal, it will output the remote alarm signal transmission. The indicating device can also receive the reset signal from the distant place, and will reset it by remote operation
  7. Test: The indicator can carry on the work of self test.

   

• 1. Short circuit current alert: ≥150A continuously adjustable; factory set: 630A, short circuit delayed 20-300ms adjustable, factory set 200ms
  2. Earthing current alert: ≥5A-400A continuously adjustable; factory set: 10A, earthing delayed 20-300ms adjustable, factory set: 200ms
  3. Working power supply: ER 14505 lithium battery 3.6V/1.9Ah (Valid≥8 years)
  4. Overall unit standby current: ≤5μA
  5. Automatic reset time: 1s-32h (factory set 8h)
  6. Indicator level of protection: Indicator IP40; sensor IP65
  7. Remote relay: 30DC/2A; 230VAC/1A
  8. The biggest withstand current of short circuit current sensor:   20KA 4s
  9. Working environment: -40℃ to +75℃ ; relatively temperature: ≤95%; waterproof, acid proof,  anti salt mis
  10. Usage range: below 20kV  system

   

• 1. The indicator can installed in the ring main unit (Switch board, cable branch box, etc. ) on the front panel and the operator must push the shrapnel on the indicator while dismantling it
  2. The indicator size: 96*48* 80 mm
  3. The hole size: 92*44 mm

  4. Earthing sensor:
  The three cables of earthing sensor should be wrapped while installing, the earthing cable should be crossed back to the sensor
  5. Connection between earthing sensor and indicator
  Red, yellow, blue cables should be fixed to the corresponding terminal 3, 2, 1 on the back of indicator

  

   

   

   

• 1. The starting value of short circuit alert current
  2. The starting value of earthing alert current
  3. Automatic reset time
  4. The length of wire (fiber) (standard length is 2m/EA, added length should be paid additionally)

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