Fas 15/27/34.5kv Auto Sectionalizer
China Fas 15/27/34.5kv Auto Sectionalizer, Find details about China High Voltage Auto Sectionalizer, Auto Sectionalizer from Fas 15/27/34.5kv Auto Sectionalizer
Basic Info.
Model NO.
FAS
Standard
JIS
Trademark
FARADY
Transport Package
Wooden Case
Origin
Zhejiang
Model NO.
FAS
Standard
JIS
Trademark
FARADY
Transport Package
Wooden Case
Origin
Zhejiang
Product Desciption
General
The electric sectionalizer has been developed for use on overhead distribution lines to improve reliability and service continuity. It enhances the protection of the distribution system in a simple, economical way which is free from maintenance and spares. Statistics indicated that 70% - 90% of fuse cutout operations are in response to transient faults. The electronic sectionalizer enables customers to better manage these types of transient faults. It is designed to substitute a fuse cutout, ensuring effective isolation only in the event of a sustained fault. It remains unresponsive to transient faults. The sectionalizer is a self-contained device, designed to be used in a coordinated overcurrent protection scheme with automatic reclosers.
This sectionalizer uses micro-computer and operating trip mechanism and does not require external auxiliary supply.And it is designed to withstand the mechanical forces generated by high fault currents. Its design also caters for the durability needed with repetitive hook stick closing in harsh outdoor environments.
The electronic sectionalizer incorporates electronic logic and trip circuits which are controlled and powered by a dual core current transformer mounted on the copper conductive tube.The current transformer is mounted externally to the conductive tube and encapsulated in a durable weatherproof epoxy.
The electronic circuit provides the necessary intelligence for counting recloser tripping operations and provokes the opening of the sectionalizer at the appropriate time. The electronic circuit is encapsulated with epoxy, within the environmentally sealed conductive tube. The tube acts as a faraday cage, protecting the electronic circuit from the influence of magnetic fields.
Tripping is achieved when a solenoid located in the lower half of the conductive tube is energized and the trip arm is released enabling the hinged trunnion to collapse.
Working principle
The current transformer built in the cutout sectionalizer can detect the current of the main circuit and send the output to the electronic control for digital handling. When a fault occurs, the upstream recloser (or circuit breaker) opens, the circuit loses voltage and the current is lower than 300mA, the electronic controller can remember this opening time as a "count". As it accumulate the presetting number (1 to 4), the sectionalizer will automatic trips within 180ms of fault interruption to isolate fault. Then the upstream recloser (or circuit breaker) closes to restore power supply to the healthy section of the system to limit outage scope and protect the main feeder in service. If the fault is temporary and is cleared before the sectionalizer counter reaches the presetting number, the sectionalizer remains closed and resets to its original state after its reset time expires.
Counts
The number of counts differentiates real faults from transient faults. When the preset number of counts is registered, the electronic sectionalizer will operate.
The sectionalizer can be set to 1, 2, 3, 4 counts. It registers a count when a current dead time exceeding 200 milliseconds occurs, immediately after a current pick up. This ensures the sectionalizer only registers a count when a recloser has tripped due to a fault current.
The count setting should be one count less than the immediate upstream recloser.
Pick up current
The pick up current is the threshold, which must be exceeded in order to register a count. The pick up requires a minimum fault pulse that is 10% greater than the pick up current setting and is longer than 20 milliseconds in duration.
Resetting
The electronic sectionalizer will reset itself during the drop out operation. Do not need remove the unit from its mount using a hook stick and reset it manually.
Service conditions
1.The ambient air temperature is not above 55ºC or below -40ºC.
2.The average value of the ambient temperature, measured over a period of 24h,does not exceed 25ºC.
3.The altitude does not exceed 1000 m (3300ft).
4.The wind speed does not exceed 34 m/s (corresponding to 700 Pa on cylindrical surfaces).
5.The ice coating does not exceed 1mm.
6.The sectionalizer should not apply to those flammable, explosive, corrosive and severe vibration conditions. As to other service conditions not covered in the manual, please contact and consult with the manufacturer for detail information.
Technical data
Rated actuating current: 8 to 400A
Reclaim time: 20 ±5%s
Operation counts: 1-4
Sensitivity of pick up current: ±10%
Max. load current prior to operation: 0.3A
Min. recloser dead time: 500ms
Min. duration of fault pulse: 10ms
Selection list
Please inform the order before ordering. For example:
Note: Please view the label to know the section current(I1, I2, I3, I4, I5) .
Application
Normally, the sectionalizer is applied in conjunction with an upstream recloser or circuit breaker.For Example:
The recloser applied in the substation is set (1 fast and 3 slow) 4 shots to lockout and 6 units cutout sectionalizers (F1, F2, F3, F4, F5, F6) are applied in the four branch line to separate 7 section ( L1, L2, L3, L4, L5, L6, L7). The counts of F1 is set to 3 time, F2, F3, F5 are set to 2 times and F4, F6 are set to 1 time. As shown in the following figure:
If there is a fault E1 in section L5, a fault current flow the recloser and sectionalizer F1, F3, F4, The recloser trip and all the line lost voltage, The sectionalizer F4 trip after it reach to the presetting "count" number 1 and isolate the fault section L5, the rescloser reclose and restore the healthy section L1, L2, L3, L4, L6, L7 to service.
If a fault E2 in section L6, a fault current flow the recloser and sectionalizer F1, F5, the recloser trip, if the fault is temporary, the recloser reclose to restore the line in service, then the sectionalizer F1, F5 remains closed and resets to its original state after a presetting time since it does not reach the presetting count number,. if the fault is permanent, the recloser fail to reclose successfully and trip again, all the line lost voltage and the sectionalizer F5 trip to isolate fault section L6 after it reaches the presetting count number 2, the sectionalizer F1 remain closes state since it does not reach the presetting count number. The recloser reclose again and restore the healthy section L1, L2, L3, L4, L5 to service.
If a fault E3 in section L2, a fault current flow the recloser and sectionalizer F1, the recloser trip. If the fault is temporary the recloser reclose to restore the line in service, then the sectionalizer F1 remains closed and resets to its orginal state after a presetting time since it does not reach the presetting count number. If the fault is permanent , the recloser fail to reclose successfully and trip again all the line lost voltage and the sectionalizer F1 trip to isolate fault section L2 after it reach the presetting count number 3, The recloser reclose again and restore the healthy section L1 to service.
The count number of sectionalizer is set 1 time normally as it applied in the end of substation because almost fault occurring at the end of substation is permanent and is set 2 or 3 times applied on the overhead line because almost fault applied on the overhead line is temporary.
In this co-ordination, the sectionalizer can easily and optimized co-ordinate.
The electric sectionalizer has been developed for use on overhead distribution lines to improve reliability and service continuity. It enhances the protection of the distribution system in a simple, economical way which is free from maintenance and spares. Statistics indicated that 70% - 90% of fuse cutout operations are in response to transient faults. The electronic sectionalizer enables customers to better manage these types of transient faults. It is designed to substitute a fuse cutout, ensuring effective isolation only in the event of a sustained fault. It remains unresponsive to transient faults. The sectionalizer is a self-contained device, designed to be used in a coordinated overcurrent protection scheme with automatic reclosers.
This sectionalizer uses micro-computer and operating trip mechanism and does not require external auxiliary supply.And it is designed to withstand the mechanical forces generated by high fault currents. Its design also caters for the durability needed with repetitive hook stick closing in harsh outdoor environments.
The electronic sectionalizer incorporates electronic logic and trip circuits which are controlled and powered by a dual core current transformer mounted on the copper conductive tube.The current transformer is mounted externally to the conductive tube and encapsulated in a durable weatherproof epoxy.
The electronic circuit provides the necessary intelligence for counting recloser tripping operations and provokes the opening of the sectionalizer at the appropriate time. The electronic circuit is encapsulated with epoxy, within the environmentally sealed conductive tube. The tube acts as a faraday cage, protecting the electronic circuit from the influence of magnetic fields.
Tripping is achieved when a solenoid located in the lower half of the conductive tube is energized and the trip arm is released enabling the hinged trunnion to collapse.
Working principle
The current transformer built in the cutout sectionalizer can detect the current of the main circuit and send the output to the electronic control for digital handling. When a fault occurs, the upstream recloser (or circuit breaker) opens, the circuit loses voltage and the current is lower than 300mA, the electronic controller can remember this opening time as a "count". As it accumulate the presetting number (1 to 4), the sectionalizer will automatic trips within 180ms of fault interruption to isolate fault. Then the upstream recloser (or circuit breaker) closes to restore power supply to the healthy section of the system to limit outage scope and protect the main feeder in service. If the fault is temporary and is cleared before the sectionalizer counter reaches the presetting number, the sectionalizer remains closed and resets to its original state after its reset time expires.
Counts
The number of counts differentiates real faults from transient faults. When the preset number of counts is registered, the electronic sectionalizer will operate.
The sectionalizer can be set to 1, 2, 3, 4 counts. It registers a count when a current dead time exceeding 200 milliseconds occurs, immediately after a current pick up. This ensures the sectionalizer only registers a count when a recloser has tripped due to a fault current.
The count setting should be one count less than the immediate upstream recloser.
Pick up current
The pick up current is the threshold, which must be exceeded in order to register a count. The pick up requires a minimum fault pulse that is 10% greater than the pick up current setting and is longer than 20 milliseconds in duration.
Resetting
The electronic sectionalizer will reset itself during the drop out operation. Do not need remove the unit from its mount using a hook stick and reset it manually.
Service conditions
1.The ambient air temperature is not above 55ºC or below -40ºC.
2.The average value of the ambient temperature, measured over a period of 24h,does not exceed 25ºC.
3.The altitude does not exceed 1000 m (3300ft).
4.The wind speed does not exceed 34 m/s (corresponding to 700 Pa on cylindrical surfaces).
5.The ice coating does not exceed 1mm.
6.The sectionalizer should not apply to those flammable, explosive, corrosive and severe vibration conditions. As to other service conditions not covered in the manual, please contact and consult with the manufacturer for detail information.
Technical data
Rated actuating current: 8 to 400A
Reclaim time: 20 ±5%s
Operation counts: 1-4
Sensitivity of pick up current: ±10%
Max. load current prior to operation: 0.3A
Min. recloser dead time: 500ms
Min. duration of fault pulse: 10ms
Selection list
Please inform the order before ordering. For example:
| Pick up current (A) | Count/counts | ||||
| I1 | I2 | I3 | I4 | I5 | 1,2,3,4 |
Dimension and Mounting Arrangements
Note: 1. Installation mode can be designed according to customer requirements. 2. Link must be balanced when installed. |
Application
Normally, the sectionalizer is applied in conjunction with an upstream recloser or circuit breaker.For Example:
The recloser applied in the substation is set (1 fast and 3 slow) 4 shots to lockout and 6 units cutout sectionalizers (F1, F2, F3, F4, F5, F6) are applied in the four branch line to separate 7 section ( L1, L2, L3, L4, L5, L6, L7). The counts of F1 is set to 3 time, F2, F3, F5 are set to 2 times and F4, F6 are set to 1 time. As shown in the following figure:
If there is a fault E1 in section L5, a fault current flow the recloser and sectionalizer F1, F3, F4, The recloser trip and all the line lost voltage, The sectionalizer F4 trip after it reach to the presetting "count" number 1 and isolate the fault section L5, the rescloser reclose and restore the healthy section L1, L2, L3, L4, L6, L7 to service.
If a fault E2 in section L6, a fault current flow the recloser and sectionalizer F1, F5, the recloser trip, if the fault is temporary, the recloser reclose to restore the line in service, then the sectionalizer F1, F5 remains closed and resets to its original state after a presetting time since it does not reach the presetting count number,. if the fault is permanent, the recloser fail to reclose successfully and trip again, all the line lost voltage and the sectionalizer F5 trip to isolate fault section L6 after it reaches the presetting count number 2, the sectionalizer F1 remain closes state since it does not reach the presetting count number. The recloser reclose again and restore the healthy section L1, L2, L3, L4, L5 to service.
If a fault E3 in section L2, a fault current flow the recloser and sectionalizer F1, the recloser trip. If the fault is temporary the recloser reclose to restore the line in service, then the sectionalizer F1 remains closed and resets to its orginal state after a presetting time since it does not reach the presetting count number. If the fault is permanent , the recloser fail to reclose successfully and trip again all the line lost voltage and the sectionalizer F1 trip to isolate fault section L2 after it reach the presetting count number 3, The recloser reclose again and restore the healthy section L1 to service.
The count number of sectionalizer is set 1 time normally as it applied in the end of substation because almost fault occurring at the end of substation is permanent and is set 2 or 3 times applied on the overhead line because almost fault applied on the overhead line is temporary.
In this co-ordination, the sectionalizer can easily and optimized co-ordinate.
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