Load Break Switch
Swich Load Break Switch (LBS) is a three phase phase switch or circuit breaker for off-field placement on a pile, which is electronically controlled. switches with placement on the pile are optimized via remote control and automation schemes. Swich breaker load is also a vacuum cleaner system isolated by SF6 gas in a stainless steel tank and sealed. its full-insulated cabling system and simple pile mounting system that makes the installation process faster at a lower cost. its electronic control system is placed on a control box made of stainless steel so it can be used in various environmental conditions. The control panel (user-friendly) and withstand all weather conditions. remote monitoring and control systems can also be added without the need to add Remote Terminal Units (RTUs).
Generally the versions of the equipment consist of:
• Pole Top Load Break Switch
• Pole Top Control Cubicle
• Control & Protection Module
related documents include:
• Window Switchgear Operating System (WSOS)
• Test and Training Set (TTS)
• Database Access Protocol (DAP)
• Specific Telemetry Protocol Implementations
• Remote Control Panel
• Field Workshops and Test Procedures
• CAPM Replacement Procedure
Version-Equipment Version includes Contact Close from close command acceptance <1.2 sec and Contact Open since receipt of open command <1.2 sec. Maximum Line Volume on Swicthgear Ratings between 12
or 24kV with continuous current 630 A RMS. SF6 Gas Isolation medium with operational pressure of SF6 gas at 20 C is 200kPa Gauge. Manual operation can be done independently by the operator. Pressure to operate the Max 20 kg lever. load breaker switches equipped with elastomeric bushing boots for open space. These boots can accommodate insulated cables with diameter ranges between 16 - 32 mm and will produce a fully isolated system. pre-cut cable that has been given a terminal can be used directly for the bushing load switch and has fulfilled the requirements in accordance with the equipment. however, for cables, may use those provided by the apparatus as long as it still meets the specified specifications.
LBS with SF6 Gas
Construction and Operation Load Break Switches and Sectionalisers are described as follows. load Break Swicth uses a puffer interrupter inside a fully welded stainless steel tank filled with SF6 gas. Interrupters are placed in groups and driven by the spring mechanism. it is operated both manually and with a DC motor in the motor compartment under the tank. Electric motors come from 24V batteries in the control room. current transformers are installed in the tank and connected to electronic elements to provide an interference indication and line measurement. there are epoxy bushing-bushings with capacitive voltage transformers, these are connected to electronic elements to provide line sensing and measurement. the electronic control elements located in the control room have the same standard used to operate the intelligent swicthgear, which is connected to the swicthgear with the control cable inserted into the Swicth Cable Entry Module (SCEM) located within the motor compartment.
using TM-19 Construction.
Construction TM-19 is a special pole mounted LBS (Load Break Switch) at the top. Has double traves. Isolator used type of suspension.
Coordinate Load break switch, SSO, PBO in case of interference
- Power Dispute (PMT)
a circuit breaker (PMT) is an electrical breaker that serves to connect and disconnect the electrical (switching equipment) both under normal conditions (according to plan with the purpose of maintenance), abnormal (interference), or maneuvering the system, so it can monitorcontinuity of power system and reliability of maintenance workthe conditions to be met by a circuit breaker or a Circuit Breaker (CB) are:
a. Must be able to cover and flows full load current for a long time.
b. Can open automatically to disconnect load or load more.
c. should be able to disconnect quickly when a short circuit occurs.
d. The gap (Gap) must withstand the circuit voltage, when the contact opens.
e. Able to flow short circuit with a certain time.
f. Able to break the current of transformer or network transformer as well as current of loading (Charging Current)
g. able to withstand the effects of its contact arching, electromagnetic force or high thermal conditions due to short circuit.
This intermediate voltage pMT is usually installed on the Main Stage, on the incoming cord of the Incoming Cubicle and on any Outgoing Cubicle (outgoing Cubicle) leading to the outflow from the Substation (The authority of the intermediate voltage carrier is the sideIncoming Cubicle).viewed from the fire extinguishing media PMT distinguished on:
- PMT with oil media (Oil Circuit Breaker)
- PMT with SF6 gas media (SF6 Circuit Breaker)
- PMT with vacuum media (Vacum Circuit Breaker)
the construction of a 20 kV PMT system on the Parent Substation is usually made so that the PMT and its driving mechanisms can be pulled out / drawable (in order to test position if there is a blackout due to maintenance work or disturbance).
In the work area of PT. pLN (Persero) UPJ Wiradesa itself there are 4 feeder and PMT Feeder active. The respective feeder and its active PMT feeder include: - PKN 3
- PKN 5
- PKN 8
- PKN 12
- Disconector (DS) / Switch Separator
is a breaker device used to close and open on the main safety / recloser components, the DS can not be operated directly, as it has a specially designed design and has a specific class or specification, if imposed for direct operationit will cause a fire bow that can be fatal.what is meant by the direct operation is the connection or disconnection of power by using DS at the time the DS is still powered voltage.
the operation of the DS can not be simultaneously but operated one by one because between one DS with another unrelated DS, usually using a stick (a special stick) that can be extended or shortened according to the distance where DS is located, the DS itself consists ofceramic material as a support and a metal-based knife as its switch.3. Air Break Switch (ABSw)
Air Break Switch (ABSw) is a connecting device that functions as a separator and is normally installed on an external network. Usually the contact medium is air which is equipped with arc damper / interrupter in the form of air blowing. aBSw is also equipped with arc damper which serves to muffle the arc arcing caused at the time of opening / removing ABSw knife in the condition of the tension. then ABSw is also equipped with a fulcrum insulator as ABSwriter support, contact blade as a motion contact that functions to open / disconnect and connect / insert ABSw, as well as ABSw handlebar that acts as a ABSw blades drive rod. routine maintenance performed for ABSw because it is often operated, resulting in the knives being worn and there is a gap when inserted into the damper / contact. This gap that resulted in sparks spark that can make ABSw burned.
installation of ABSw on the network, among others used for:
a. Added load on network location
b. Reduced load on network location
c. Separation of the network manually when the network is interrupted.
ABSW consists of:
- Stang ABSW
- Iron Cross Arm
- Bone Isolator
4.Contact knife - Ground Wire
- Fire Bow
- Flexible Metal Ribbons
- Load Break Switch (LBS)
- Recloser (Auto Reverse Cover / PBO)
recloser is the equipment used to protect when there is interference, on the downstream side will open automatically and will do the reclose up to several times depending on the setting and finally will open permanently if the interruption is still not lost(lock out).recloser normalization can be done either manually or by remote system. Recloser also serves as a barrier to the area that is extinguished by permanent disturbance or can localize the disturbed area
recloser has 2 (two) characteristics of operation time (dual timming), that is fast operation (fast) and slow operation (delay)
According to the recloser phases differentiated above:
a. 1 phase recloser
b. 3 phase recloser
According to the sensor used, the recloser is distinguished upon:
a. recloser with voltage sensor (using voltage transformer) used in east java
b. Reclosers with current sensors (using current transformers) are used in central Java
AVS installation when there is a short circuit
Ways of working :
point B we consider an interruption, so PMT trip and section A, section B, section C, section D is not on hold. AVS 1, AVS 2, AVS 3 will open after an interval of t-3 = 0.5 seconds. pBO - 1 works and after reaches 60 seconds, PMT Repeater reenter (Reclose 1), then t -1 = 10 seconds interval after AVS 1 feel voltage then AVS 1 will close. Because in section B there is still interference then PMT Repeat trip again. aVS 1 & AVS 2 immediately locks because time feels very fast voltage (smaller than time t-2 = 5 seconds). PBO - 2 works and after reaching 180 seconds, PMT Repeater reenter (Reclose 2) and section A are on hold. Section B, section C and section D are not on / off. the power flow of the Disperse is only in section A only.in addition to installed AVS that is operated automatically is also widely used LBS which operated manually and has the same function that is as a breaker tool that can localize the network section is disrupted so as not to affect the other network section.