Professional Supply 1250kva Compact Electric Box Substation With Connector

 

 

Type zrtbbz

Complete set of high voltage reactive power automatic compensation device

instructions

 

catalogue

1, Safety precautions two

1.1 safety precautions two

2, Overview of zrtbb complete plant three

2.1 overview three

2.2 working principle three

2.3 specification and model three

2.4 applicable standards three

2.5 environmental conditions four

2.6 electrical requirements four

2.7 structural requirements four

2.8 components five

2.9 main functions five

2.10 technical performance five

3, Model zrtbb high voltage reactive power automatic integrated controller seven

4, Transportation, handover acceptance and storage eight

4.1 transportation eight

4.2 handover acceptance eight

4.3 storage eight

5, Installation and operation nine

5.1 installation nine

5.2 operation nine

5.3 commissioning nine

6, Common faults and treatment eleven

6.1 common abnormal conditions and faults of compensation device eleven

6.2 abnormal phenomena and faults of shunt capacitors in operation eleven

6.3 sound signal will be sent out after relay protection action of the whole set of device twelve

7, Operation and maintenance thirteen

8, Precautions fourteen

1, Safety precautions

1.1 safety precautions

Electrical equipment should be installed, operated, used and maintained by qualified professionals. This manual is an operation manual used by trained professionals, which causes adverse consequences if it is not operated according to the requirements

The company will not be held responsible.

! notes meaning

Danger of electric shock, combustion and explosion

·Only professionals can install the device, and read the instructions completely.

·Don't work alone.

·Disconnect all power connections before checking, testing and maintaining this device.

·Special attention should be paid to the design of power supply system, considering all power supply, including the possibility of reverse power transmission

Ability.

·Use a test device that adjusts the voltage correctly to make sure that all power supplies are disconnected.

·Be careful of potential hazards, make personal protective equipment, and carefully check the working area of the equipment to see if there are tools and other objects left behind.

·When removing or installing the panel, do not touch the power cord to avoid nailing on the operation panel,

To avoid personal injury.

·The successful operation of this device depends on the correct handling and installation operation. Ignoring the basic installation requirements may cause personal injury, or damage to electrical equipment or other objects.

Failure to follow this instruction may result in personal injury or death.

2, Overview of zrtbb complete plant

2.1 overview

Zrtbb type high voltage reactive power automatic compensation device consists of several groups of TBB type automatic compensation cabinets. Each group of automatic compensation cabinet contains vacuum contactor (circuit breaker), discharge coil, current transformer, dry-type air core (or dry-type iron core) reactor with inrush or harmonic resistance, capacitor and corresponding control and protection devices. It is generally an integrated device assembled in one cabinet. It is specially designed and manufactured for places where 6kV and 10kV system load changes greatly in metallurgy, iron and steel, machinery, cement, transportation, chemical industry and other industries.

The complete set of device can be a group of automatic compensation cabinet and a controller, which can be set separately, or two to six groups can share a controller, which is composed of a set of internal bus connected.

2.2 working principle

According to the fuzzy control strategy, the voltage and reactive power of the whole plant are controlled by the controller with high reliability. The capacitor bank is switched by high voltage vacuum switch. When the reactive power value detected by the controller exceeds the setting value, the controller gives the control signal according to the number of stages of the capacitor bank to be put into operation, and automatically closes the high-voltage vacuum switch to put the capacitor bank into operation; When the reactive power of the load is lower than the setting value, the controller will give a control signal to turn off the high voltage vacuum switch, and the capacitor bank will quit working. The above working state is fully automatic.

2.3 specification and model

 

2.5 environmental conditions

1) Installation location: indoor / outdoor.

2) Altitude: 1500m and below (customized for high altitude or special areas)

3) Ambient temperature: - 25 ℃~ + 45 ℃, monthly average maximum relative humidity: 90% (at 25 ℃)

4) Earthquake resistance: ground horizontal acceleration 0.2g, vertical acceleration 0.1g. According to the standard test, the safety factor is more than or equal to 1.67.

5) If the applicable conditions of the device exceed the above requirements, it shall be designed separately

2.6 electrical requirements

1) Main technical parameters: system rated voltage: 6kV (10kV), maximum voltage: 7.2kV (12kV),

Rated frequency: 50 Hz, short circuit current: 31.5 Ka RMS.

2) Electrical distance:  minimum clear distance between live parts of 10kV equipment: 0.125m, 6kV equipment

Minimum clear distance between live part and adjacent grounding body: 0.100m

2.7 structural requirements

1) The device is cabinet type, including: vacuum contactor (special vacuum switching switch for capacitor, permanent magnet contactor), shunt capacitor, fuse, reactor (damping resistance), discharge coil, zinc oxide arrester, indicating instrument, relay protection, post insulator, bus, lead wire, steel frame, high voltage cable head, secondary cable terminal room and cabinet door Multi cabinet door electrical and mechanical interlocking locking device and other components. The safe clear distance of each element in the cabinet meets the requirements of "code for design of 3 ~ 110kV High voltage power distribution equipment" (GB 50060-92). The fixation and connection of components in the cabinet shall be in accordance with the national standard

2) The "five prevention" function between cabinets is locked by electromagnetic lock. The cabinet door adopts full mechanical locking device or

Mechanical and electrical double locking device( Or according to the design requirements of the bid inviting party.

2.8 components

1) Zrtbb type voltage and reactive power integrated regulation controller. On the operation panel of the device, it receives the secondary voltage signal of the transformer secondary bus voltage transformer and the secondary current signal of the current transformer, calculates the reactive power to be compensated, and controls the switching of the capacitor bank.

2) High voltage shunt capacitor: capacitor is the main body of reactive power compensation device, which generates capacitive reactive power

It can compensate the inductive reactive power of the load.

3) Reactor for restraining inrush current or harmonic: dry type air core reactor or cast iron core reactor is used. The latter has the advantages of small volume and small magnetic flux around, so it is suitable to be installed in the cabinet. Its function is to restrain the inrush current or harmonic when the capacitor is switched on, reduce the interference to the power grid or harmonic amplification and the impact and damage to the capacitor.

4) Discharge coil: it is used as the discharge circuit of the capacitor after the capacitor is opened. After discharge, the capacitor can be put into operation again. Otherwise, overvoltage will be generated at both ends of the capacitor when it is put into operation again, which may damage the capacitor. The secondary side of the discharge coil is connected into an open triangle as the zero sequence protection of the capacitor, and the discharge coil can be replaced by a voltage transformer.

5) Zinc oxide arrester: it is used as overvoltage protection.

6) Spray by spray fuse: each capacitor is equipped with a fuse, as the over-current protection of a single capacitor.

7) Current limiting fuse: it is the quick break protection of the whole device.

8) High voltage capacitor switching switch (vacuum contactor or high voltage vacuum circuit breaker): when the total capacity of each group of automatic compensation cabinet is less than or equal to 3000kvar, it is switched by high voltage vacuum contactor. If the total capacity is more than 3000kvar, it is switched by high voltage vacuum circuit breaker. The switching is controlled by zrwkg type voltage and reactive power comprehensive regulation controller.

2.9 main functions

1) Automatic compensation of load reactive power and improvement of load power factor

2) Reduce network loss, high efficiency and energy saving

3) Suppress system harmonic or control harmonic according to user's requirement

4) Reducing reactive current and saving transformer capacity increase cost

2.10 technical performance

1) Integrated control of voltage and reactive power

a. Realize voltage priority: automatically switch the compensation cabinet according to the voltage quality requirements. When the voltage exceeds the set value, gradually cut off the capacitor bank until the voltage is qualified. When the voltage exceeds the set value, gradually switch on the capacitor bank under the condition of no compensation. Before switching on the capacitor, first inquire whether the voltage exceeds the high limit, and then decide whether to switch on the capacitor to avoid frequent action. Keep the bus voltage within the specified range.

b. Automatic reactive power compensation: according to the principle of voltage priority, according to the actual reactive power required by the system, automatically switch capacitor compensation cabinet group, reactive power under compensation gradually switch capacitor group (according to the measurement of reactive power); Step by step cut the capacitor bank without power over compensation. The system is always in the state of no over-voltage, less over compensation, under compensation and minimum reactive power loss.

2) Operation record and voltage detector function (optional function)

It can automatically or at any time call out the memory, check or print the voltage value and time, the switching times of compensation cabinet, etc

Statistical report of the current month and last month.

3) Comprehensive insurance function

a. Each group of devices has switch protection: over voltage, loss of voltage, over current, short circuit and zero sequence relay protection

Fuse over-current protection, zinc oxide arrester over-voltage protection, grounding protection, quick break protection, etc.

b. Anti misoperation: before automatically sending out the control command of each action, first inquire the possible faults after the action

Over limit value, reduce the number of actions

c. Abnormal alarm locking: when the capacitor control circuit relay protection action, refuse to move and controller power loss and other faults occur, the sound and light alarm will be sent out to display the fault location and locking outlet;

d. Automatic manual isolation: when it is necessary to manually exit the automatic switching state of any compensation cabinet group, the controller will automatically lock and exit the control.

4) Overload capacity

a. The whole set of plant can operate for a long time under 1.1 times of rated voltage, 30min every 24h under 1.15 times of rated voltage, 5min twice a month under 1.2 times of rated voltage, and 1min twice a month under 1.3 times of rated voltage.

b. The whole set of equipment can operate continuously under the effective value of 1.3 times of the rated current.

3, Model zrtbb high voltage reactive power automatic integrated controller

Use and operation of controller

The use and operation of the controller are detailed in the controller manual

4, Primary schematic diagram equipment front view

4, Transportation, handover acceptance and storage

4.1 transportation

1) In addition to short distance transportation by truck, the device is easy to handle, lift and separate with nylon bag to avoid damage

Packing, fixed in wooden cases. The top of the wooden box is protected from rain.

2) There are shipping marks on the packing cases. During transportation and storage, it is not allowed to turn upside down or over to avoid damaging the paint

Surface and prevent the impact deformation of the framework.

4.2 handover acceptance

When the product is transported to the site, check and accept the goods and data according to the packing list, open the packing box and check the box

Check whether the components are complete according to the technical conditions of the components

Do a good job of filing and preservation, after the acceptance, both parties sign for confirmation

4.3 storage

When the device is stored, rain proof and moisture-proof measures should be taken instead of being placed directly on the wet soil. around

The air temperature and humidity shall comply with Article 2.5 (3), and there shall be no corrosive smell in the warehouse.

5, Installation and operation

5.1 installation

1) When the device is installed, open the packing box to check whether the components in the box are complete. The acceptance shall be conducted according to the acceptance items specified in the technical conditions of each component.

2) The installation personnel shall install the device in place according to the company's infrastructure drawing, check whether the cabinet is flat, and check whether the cabinet sequence is correct. After confirming that the cabinet appearance is in order, the sequence is correct, and the grounding is good, the internal assembly and debugging shall be carried out by the company's personnel.

3) The device has been installed before leaving the factory. Considering the safety and weight of components and other factors, the reactor and capacitor have been removed and packed separately during delivery. When the goods are delivered to the manufacturer, the company will send someone to guide the installation and check the integrity of the whole cabinet. The manufacturer is requested to sign after acceptance.

4) The capacitor name plate on the capacitor cabinet should face outward to facilitate the inspection of the staff.

5.2 operation

1) First, connect the control power supply (dc220v / dc110v) of the whole set of device.

2) Set the change-over switch of the complete cabinet to the manual position to exit automatically; Set to auto position, manual exit.

3) At this time, the indicator light and controller on the panel of the whole set of device should display normally.

4) (close the relevant isolating switch).

5) Turn on the high voltage power.

5.3 commissioning

1. Inspection before commissioning

(1) check whether the installed electrical components are consistent with the design configuration

(2) whether the color sequence and installation structure of busbar meet the standard

(3) check whether the electrical clearance and creepage distance of the device meet the standard

(4) check whether the installation screws of cabinet structure and components are all tight

(5) check whether all primary and secondary thread ends are fastened

(6) According to the design drawings, check whether the safety distance of primary equipment is enough (12.5cm).

2. Insulation resistance

(1) whether the phase to phase and phase to ground (2500 megohm) live display device can work normally.

(2) secondary circuit (500 megohm).

3. Withstand voltage test

(1) phase to phase and phase to ground (according to the actual voltage level and standard, the time is one minute)

(2) secondary circuit (2000 V, 10 seconds)

4. Add rated operating voltage for debugging

(1) check if there is any fault in the secondary circuit, and all secondary devices (such as instruments, indicator lights and lamps)

Button, intermediate relay, voltage relay, vacuum contactor, etc.) can work normally.

(2) manual opening and closing circuit: under the condition that the secondary circuit is not short circuited, the rated secondary power supply is added for opening and closing (the transfer switch is in the manual position). If the opening and closing can be carried out smoothly and the opening and closing indicator can work normally, it means that there is no fault in the opening and closing circuit; If the switch cannot be opened or closed, the secondary device fault on the circuit shall be eliminated first, and then the circuit fault shall be eliminated according to the drawing

(3) automatic opening and closing circuit: the controller is used for opening and closing (at the transfer switch)