1. For the charging of the spare bus, when there is a bus tie circuit breaker, the bus tie circuit breaker should be used to charge the spare bus. At this moment, the maintenance device of the bus tie circuit breaker should be fully invested, and the relevant maintenance value and time limit should be changed to smaller, so as to facilitate the bus problem, the bus tie circuit breaker can quickly trip, remove the fault point, and when the standby bus is well charged, and then the maintenance value and time limit are recalled. If there is no bus tie breaker, a barrier switch can also be used to charge when the spare bus is admitted to be in good condition.
2. When charging with bus tie circuit breaker, the charging latching connector in the differential maintenance circuit should be stopped in advance to avoid differential maintenance. At the end of the matter, only the bus tie circuit breaker is jumped, and then it is put into operation after the charging operation is completed.
3. In the process of pulling and closing the barrier switch of the bus reversing, the fuse of the operating power supply of the bus tie circuit breaker should be removed to prevent the bus tie circuit breaker from tripping by mistake during the reverse operation, resulting in the incident of pulling and closing the barrier switch with load.
4. When all the components connected to one bus are switched to another bus, there are two switching times; One is to close the barrier switch of one element to a bus, and then disconnect the other bus barrier switch; The other is to merge the blocking switches of all components into one bus one by one, and then disconnect the corresponding blocking switches on the other bus. This is determined by the placement of the location of the barrier switch operating organization and the habits of the site.
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Introduction to the hazards of arc light – Wiener
The arc of the switchgear cable distance problem causes the pressure and temperature in the switchgear to increase quickly, and if not removed in time, it will form a major hazard in the following aspects:
(1) The arc temperature is 2 times the appropriate solar temperature, and the large ...
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The advantage of closed busbar over open busbar is Wiener
1) Closing the bus duct can reduce the grounding fault, prevent the short circuit between the phases, and fundamentally eliminate the grounding fault caused by external moisture, dust and foreign objects, and improve the continuity of generator operation.
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Wiener busbar system PT disconnection treatment
The judgment of PT three-phase voltage loss (symmetrical disconnection) is fundamentally the same for each manufacturer, and it is judged according to the three-phase no voltage and the current of the line. The same is true for PT asymmetrical wire breakage. After analyzing the characteristics of PT wire breaking, the specific judgment of PT asymmetric wire breaking of different manufacturers ...
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Advantages and disadvantages of bus full differential protection
Thorough differential maintenance of the bus is to connect the current transformer of all the connecting elements on the bus to the differential circuit according to the same name phase and polarity, the characteristics and transformation ratio of the current transformer should be the same, if the transformation ratio can not be together, the compensation converter can be used to compensate, satisfactory ΣI=0.
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How to choose the right fuse - Wiener
1. Select the type of fuse according to the line requirements and installation conditions. Circuits with small capacity are semi-enclosed or enclosed without fillers; The selection of large short-circuit current has a packing closed type; Semiconductor component maintenance selection of quick fuses.
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Wiener enclosed busbar installation
Closed busway is a busbar system composed of metal plates (steel plates or aluminum plates) as protective shells, conductive strips, insulating materials and related accessories. It can be made into a piercing closing bus with spaced piercing junction boxes, or a feed-in closing bus without a junction box in the middle. ...
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Difference Between Fuse and Circuit Breaker – Vernal
The principle of the fuse is to use the current to flow through the conductor to heat the conductor, and the conductor is ablated after reaching the melting point of the conductor, so the electrical appliances and circuits used for circuit maintenance are not burned out. It is an accumulation of heat, so it is also able to complete overload maintenance. Once...
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Bus voltage non-system equipment failure and solution
In order to ensure the safe and economical operation of the power system and its power generation, supply and electrical equipment, power grid users require the voltage to operate in three ways: forward voltage regulation, reverse voltage regulation and constant voltage regulation. However, when the power grid is in practice, due to the change of active and reactive power output, the increase or decrease of electricity load, and the system wiring party...
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Operating regulations for the use of busbars - Wiener
1. Charging to the bus should be carried out with a switch (bus tie, bypass or line switch) with snap-action maintenance that reflects various types of faults. Before charging the bus, it should be considered whether the system may be unstable if the charging bus trips, and if necessary, the active power flow of the relevant line can be reduced. ...
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Closed busway essentials – Wiener
Before the closed busway device, it should be ensured that the electrical shaft, the transformer and distribution room, the decoration project of the place through which the busway passes, and the heating and ventilation project are all completed to ensure that the closed busway is not polluted. The reserved holes and embedded parts of the floor and wall should be embedded and reserved according to the position required by the design.
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Features of the use of closed busway - Wiener
Compared with other air-type busway, Wiener closed busway has many similarities in appearance, and its difference lies mainly in the shell, the structure of the closed busway is more distinctive, which also makes its use have certain advantages. As long as it is in contrast ...
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Introduction to the Wiener 3-pole adapter
1、32590
EQUES®30Compact
Bus adapter 32 A
1 adjustable support rail
45 x 160 with conductor AWG 10 (6 mm²)
2、32591
EQUES®30Compact
Bus adapter 63 A
1 ...
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Difference Between Busbar and Cable – Vernal
When the busway has not been developed and introduced, the cable is still an indispensable figure in the low-voltage distribution system, when the busway system is introduced and widely used. Whether to choose the cable or the bus duct has become a topic of endless debate. So it's hard to say which of the two is better ...
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Uses and characteristics of detached closed busbar - Wiener
Closing busbars include out-of-phase shut-off buss, co-box (including co-box phase isolation) shut-off busbars and cable busbars, which are used for power plants, substations, industrial and civil power supply leads.
Phase-off busbar
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Out of phase ...
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Classification of the use of different places in the busway - Vernal
(1) General bus duct
Non-flame retardant and non-fire-resistant bus duct used in general load power distribution. In the event of a fire during a short circuit, it will always incinerate to other connected busbars, which may briefly cause fire accidents.
(2) Flame retardant bus duct
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Characteristics of power system bus wiring mode
(1) Single bus wiring. Single bus wiring has the advantages of simple and clear, less equipment, less investment, convenient operation and expansion, but its reliability and activity are poor. When the bus or bus divider is faulty or overhauled, it is necessary to disconnect all power to the bus.
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What is the Wiener bus system
The Wiener bus system is a standardized system for bus spacing, which is used in low-voltage power supply and distribution switchgear, so that the bus can both conduct electricity and support electrical components. The system is divided into 40, 60, 100 and 185mm systems.
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Conductor and bus welding requirements - Wiener
1. Before welding, it is necessary to check whether the welding equipment is defective, whether the grounding of the electrical equipment is reliable, and strictly abide by the "welder safety operation procedures" when welding.
2. Correct wires and busbars, and prohibit the use of handleless files.
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The difference between busway and busbar - Vernal
The busway and busbar are actually closed one after the other, and the other is not closed.
Closing the busbar is referred to as the busway, which means that the busway is the vest that closes the busbar, and the closing busway and the busbar refer to the same thing.
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Advantages of busbar mounted electrical equipment - Wiener
The novelty, flexibility and originality of the busbar device appliance. It indicates the vitality of this skill and its broad market prospects. This is the real reason why we pay attention to it.
First of all, this small electrical appliance set ...
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