MNS

LV draw-out switchgear

1 Summary

1.1 Scope of application

This series of LV draw-out switchgear is suitable for power plants, substations, petrochemical industry, steel smelting and rolling, transportation and energy, light industry and textile, factories and mining enterprises, residential communities, high-rise buildings, and other places. Used for energy conversion, distribution, and control of power distribution equipment for AC systems with a rated working voltage of 690V and below at a frequency of 50-60Hz.

1.2 Installation conditions

The upper limit of the ambient air temperature is +40C, and the lower limit is -5C. And the average temperature within 24 hours shall not exceed +35℃;

Atmospheric conditions: The air is clean, and the relative humidity does not exceed 50% at the highest temperature of +40C . Higher relative humidity is allowed at lower temperatures (such as 90% at +20C): However, it should be considered that occasional condensation may occur due to temperature changes;

The altitude does not exceed 2000m;

This device is suitable for transportation and storage processes at the following temperatures:- Within the range of 25℃ to+55℃, it can reach+70℃ in a short period of time (no more than 24 hours). At these extreme temperatures, the device should not suffer any irreparable damage and should be able to operate normally under normal conditions;

If the above usage conditions cannot be meet, it should be resolved through negotiation between the user and the manufacturer.

When this device is used on offshore oil drilling and production platforms and nuclear power plants, a separate technical agreement should be signed

2 Basic technical parameters

2.1 Electrical performance

2.2 Protection level

3 Cabinet structure

The basic structure of the switchgear cabinet is composed of C-shaped profiles assembled. The C profile is bent from a steel plate with an E=2.5mm module installation hole.

All frames and inner partitions are galvanized and purified. The surrounding door panels and side panels are subjected to high-voltage electrostatic spraying.

The basic structure of the cabinet is shown in Figure 1, and the basic dimensions of the cabinet are shown in Figure 2, Tables 1 and 2.

4 Switchgear type

Power distribution center cabinet (PC): Emax, MT, 3WN, AH, ME series circuit breakers can be used. Motor Control Center Cabinet (MCC): assembled from large and small drawers, each circuit main switch adopts a high breaking molded case circuit breaker or a rotating load switch with a fuse. Power factor automatic compensation cabinet (with manual, automatic, and remote power factor compensation devices)

7 Cabinet frame structure composed of C-shaped profiles (Figure 1)

8 Cabinet diagram (Figure 2)

MCC (single sided operation)

MCC (Double sided operation)

9 Partition design of cabinet body

9.1 Power Distribution Center (PC)

① Divide the PC cabinet into three compartments;

Horizontal busbar compartment: at the rear of the cabinet;

Functional unit compartment: on the upper or left side of the cabinet front

② Split measures:

The horizontal busbar compartment and the functional unit compartment are separated by steel plates; The control circuit compartment and the functional unit compartment are separated by a flame-retardant polyphenylene ether plastic cover.

③ The frame type circuit breakers installed inside the cabinet can be manually operated outside the cabinet when the door is closed. Observe the opening and closing status of the circuit breaker and determine whether the circuit breaker is in the test position or in the working position based on the position relationship between the operating mechanism and the door.

④ A component separation structure is designed between the main circuit and the auxiliary circuit. The auxiliary electrical units composed of instruments, signal lights, and buttons are all installed on a plastic board, and the cover made of flame-retardant polyurethane foam plastic is separated from the main circuit behind the board.

9.2 Withdrawable motor control center and small current power distribution center (MCC)

The withdrawable MCC cabinet is divided into three compartments, namely the horizontal busbar compartment behind the cabinet, the functional unit compartment on the left front of the cabinet, and the cable compartment on the right front of the cabinet. The horizontal busbar compartment and functional unit compartment are separated by functional boards made of flame-retardant foam plastic, and the cable compartment is separated from the horizontal busbar compartment and functional unit compartment by steel plates.

The drawers of MCC (Motor Control Center) are divided into the following 5 types:

8E/4: Height 200 \* Width 150 \* Depth 400mm

8E/2: height 200 \* width 300 \* depth 400mm

8E: Height 200 \* Width 600 \* Depth 400mm

16E: Height 200 \* Width 600 \* Depth 400mm

24E: Height 200 \* Width 600 \* Depth 400mm

9.3 Rear outgoing switchgear structure

The rear outgoing line is designed to reduce the width of the switchgear arrangement. The main busbar of the switchgear is horizontally installed at the top of the switchgear, and the rear half of the cabinet is a cable compartment. The incoming and outgoing cables are all connected in the cable compartment behind the cabinet. The front of the switchgear is a device compartment, which houses the functional units of the switchgear. The system design moves the cable compartment on the side of the switchgear to the rear closing cabinet, greatly reducing the arrangement width of the switchgear to further meet the requirements of the substation space layout. The width of the feeder cabinet is 600mm and the depth is 1000/1200mm. The top is an independent main busbar compartment isolated from the device compartment. The effective installation height of the front device compartment is 72E (E=25mm), which is isolated from the rear cable compartment through a multi-functional board, fully utilizing the installation space of the switchgear. Compact structure and flexible unit configuration. The cable compartment on the back is equipped with a door for easy installation and maintenance.

The width of the incoming cabinet is determined by the frame current of the wiring unit. The recommended width is 400/600/800/1000mm, and the cabinet depth is 1000mm.

10 Busbar system

The switchgear can be equipped with two sets of main busbars, installed in the rear busbar compartment of the switchgear. Two sets of busbars can be installed separately in the upper and lower parts of the cabinet. According to the needs of the incoming line, the upper and lower sets of busbars can be made of different or the same crosssection materials. Both can be powered separately, in parallel, or as backup power sources.

The distribution busbar (vertical busbar) can choose "L" type copper bars or rectangular copper bars; When selecting "L" type copper bars for vertical copper bars, the supporting insulation components are functional boards which have good safety performance, small size, and a maximum current of 1000A; When selecting rectangular copper bars for vertical copper bars, the supporting insulation component is the busbar clamp, which has good safety performance, large volume, and a maximum current of 2000A. All frame structural components are connected with self-tapping screws, which has high grounding reliability.

The neutral busbar and neutral protection busbar are installed parallel to the lower part of the functional unit compartment and vertically in the cable compartment. If an insulator is used to separate the N line from the PE line, the N line and the PE line should be used separately. If a conductor is used to short circuit the two lines, they become PE/N lines.

11 Protective earthing system

The protection circuit of the device consists of two parts: a separately decorated PE wire (or PE/N wire) that runs through the entire queue length and a conductive structural component. The metal structural components in the device, except for the exterior doors and sealing plates, are all galvanized. At the connection points of the structure, they are carefully designed to withstand a certain short-circuit current.

12 Auxiliary current and cable tray

An auxiliary circuit cable tray is installed at the top of the functional unit compartment, which can accommodate inter cabinet connecting wires and public power cables.

13 Cable and control line connection

On one side of the withdrawable component, the cable compartment is equipped with wiring devices and terminals for connecting the outgoing cable and the wiring between the control wire and the component. The incoming and outgoing cables and control line wiring devices are arranged on the guide rail on the right side of the cable compartment. The main circuit terminal is located at the rear, and the control line terminal is located in the front 45° direction. The wiring of the control wire terminal can be connected with screws or plug-in wire nose or copper wire. If the main circuit terminal on the adapter of the withdrawable component is less than 65A, it is equipped with PE terminal.

14 Security protection system

Each cabinet does not have one or a set of flame-retardant plastic functional boards, which are installed between the main busbar room and the electrical room. Their function is to effectively prevent accidents caused by arcing and short circuits between the busbar caused by switch components due to faults, and strict isolation measures are taken.

There is a galvanized metal bottom plate with ventilation holes between the upper and lower drawers for isolation. The smaller 8E/4 and 8E/2 drawers are surrounded by flame-retardant engineering plastic parts, so there is a strong insulation and isolation effect between adjacent circuits. Various plastic components are used inside the cabinet to support the live parts, which are halogen-free. And it has anti leakAge performance of CT1300 level or above.

15 Drawer type

There are five standard sizes, all based on a height of 8E (200mm):

8E/4: Assemble 4 drawer units in the height space of 8E.

8E/2: Assemble 2 drawer units in the height space of 8E.

8E: Assemble 1 drawer unit in the height space of 8E.

16E: Assemble 1 drawer unit in a height space of 16E (400mm).

24E: Assemble 1 drawer unit in a height space of 24E (400mm).

Five types of drawer units can be assembled in a single cabinet or as a mixed assembly. The maximum number of drawer units that can be accommodated in a single cabinet assembly is shown in Figure 3.

16 Electrical and mechanical interlocking of drawers

The drawer unit has a reliable mechanical interlocking position, which is controlled by the operating handle and has clear and accurate closing, testing, extraction, and isolation positions.

The functions of the operating mechanism are shown in Figures 4 and 5.

To enhance safety precautions, a padlock can be added after the operating handle is positioned, with a maximum of three locks.

After the drawer unit is in place, the switch functions and positions listed in Figures 4 and 5 must be strictly followed, otherwise the structural components may be damaged. Please be careful when using it.

17 Schematic diagram of operating switch functions

18 Arrangement and combination of primary plan

① The total height of the functional unit compartment is 72E.

②In the same device, the general arrangement pattern of functional units is that small functional units are above and large functional units are below.

③8E/4 drawers consist of 4 to form an 8E installation unit, 8E/2 drawers consist of 2 to form an 8E installation unit, or 2 8E/4 drawers and 1 8E/2 drawer to form an 8E installation unit

④ The current transformers depicted in the scheme are the maximum installed quantity in this scheme (in schemes 01-19, 21-39, one current transformer can be added for reactive power compensation circuit). In practical use, it can be reduced or not installed according to system needs.

⑤ There are two types of device depths: 600mm (MCC single-sided operation cabinet) and 1000mm (PC and MCC double-sided operation cabinet). It is recommended to arrange and use PC and MCC separately. When using a split function board, it is possible to allow PC and MCC to be mixed and assembled in one cabinet.

⑥ When the PC and MCC devices are arranged adjacent to each other, then:

(1) When the MCC double-sided cabinet (or 600 depth MCC single-sided cabinet) is arranged adjacent to the PC cabinet, an adapter cabinet (with a width of 400mm) must be added between the two cabinets, as shown in Figure 6, Example 1.

(2)When the single-sided operation of the MCC is deepened to 1000mm, no adapter cabinet can be added, as shown in Figure 6, Example 2.

19 Schematic diagram of combination method (Figure 6)

20 Installation, use, and maintenance

① The installation reference diagram is shown in Figures 7 and 8.

② After the device arrives at the destination, the packAging box should be checked for completeness first. If the device is not installed immediately, it should be stored in a dry and clean place

③ The device is recommended to be installed off the wall or against the wall. The installation foundation plane should be flat, and the horizontal error of the foundation channel steel should be 1/1000, with a total length deviation of 3mm.

④At that time, it is recommended to use grade 8.8 and tension washers for the bolt fixation of all conductive parts. The recommended tightening torque values are shown in the table below:

The cable head sheath and a certain number of copper connectors for the secondary circuit provided in the MCC scheme accessories. (To adapt to the cold pressing process of copper joints, it is recommended to use multi-core flexible wires for secondary cables).

After connecting the cables, the bottom of the device should be sealed to prevent small animals from crawling into the cabinet and causing short circuit accidents.

After installation or adjustment, the device needs to undergo the following inspections and tests before being put into operation:

① Check whether the electrical equipment and control wiring installed in the device comply with the factory's drawing requirements.

②Manual operation of various switches should be flexible and free from abnormalities and jamming.

③ Check whether the mechanical interlocking mechanism and electric interlocking device operate correctly and reliably, and should meet the system requirements.

④ Check whether the insulation resistance of the main circuit and control circuit meets the specified requirements.

⑤Check whether the electrical equipment installed in the device has good contact and meets the technical conditions of the electrical appliance itself.。

⑥ Check whether there are any foreign objects inside the device and if the installation screws of each component are loose.

Instructions for operating withdrawable MCC:

① The bottom of the drawer can only be pushed into the cabinet after it enters the guide correctly, otherwise it may cause damage to the drawer or failure to pull it out.

②The symbols and functions on the 8E/4 and 8E/2 drawer panels are shown in Figure 4. The arrow from the breaking position "O" to the working position "I" in the figure represents: first push the operating handle inward, then rotate the handle from "O" to "I". When returning, there is no need to push, as long as the handle "I" is turned towards "O", and after releasing, the handle will automatically pop out.

③ The symbol and function on the 8E-24E drawer panel are shown in Figure 5. When the handle reaches the working position, the mechanism releases the mechanical lock on the main switch. At this time, the main switch can be closed and opened. However, after the main switch is closed, the handle of the interlocking mechanism cannot be operated. There is a plastic small cover on the lower right corner door that meets the logo, which is the unlocking mechanism of the door. The operation process is as follows: when the drawer is in the working position, if you want to open the door, first pull out the small cover, and then use a screwdriver to insert the hole and move the lock buckle downwards to open the door. After opening the door, be sure to cover the plastic small cover, otherwise it will damage the original protection level.

21 Transportation and storage of devices

The device shall not roll over and be violently shaken.

When lifting the device after unpacking, a transportation angle plate should be used, and the angle between the two steel wire ropes should be ≤ 120° . If using a forklift, rolling bars, or prying bars, it is not allowed to be directly carried out on the bottom frame of the device.

If the device needs to be moved at a small distance during installation, it can be pried on the four corners of the chassis.

Electrical products and parts shall not be disassembled in the device.

It should be prevented from rain and moisture, and the Environment temperature should comply with the relevant regulations of this sample.

22 Product completeness

The switchgear is equipped with packing list, product qualification certificate, product user manual, and necessary drawings. The accompanying accessories include door keys and spare parts provided according to the supporting list

Option 1 Welding and installation Option 2 Bolt Installation

23 Installation diagram (Figure 7)

24 Installation diagram of busbar structure (Figure 8)

Note: The manufacturer can provide various forms of busbars according to user requirements.

GTDSVF

Multifunctional variable frequency speed control cabinet

1 Summary

1.1 Scope of application

Our company's multifunctional variable frequency speed control cabinet GTDSVF series provides customized solutions for customers, making it convenient for management and operation, and more suitable for the needs of various industries.

1) The energy-saving effect is significant, with a power saving rate of up to 40%\~85%, especially outstanding for variable load motors such as centrifugal and axial fans, water (oil) pumps, etc.

2) The speed regulation performance is far superior to other speed regulation methods such as thyristor cascade speed regulation and rotor series resistance speed regulation.

3) It has multiple protection functions such as motor overload and overheating, ensuring the safe operation of the motor.

4) It also has the soft start function of asynchronous motors.

5) It has a standard serial interface and can connect multiple frequency converters to PLC or other remote management systems.

1.2 Installation conditions

Widely used:

For various occasions, such as fans, oil fields, oil extraction equipment, domestic water supply and drainage, fire protection, spraying, pressurization, air conditioning cooling circulation, industrial control pumps, sewage discharge

Multiple functions:

It is divided into multiple control methods such as one-driven-one, one-driven-two, and two-driven-two. The main and backup pumps can be selected in any combination, with multiple starting methods and various control forms.

2 Product model and meaning

A (one-driven-one) B (one for use and one for backup)

C (without bypass) D (other)

Power(37kV)

220V 380V 660/690V 1140V

S (Three-phase) D (Single-phase)

V/F (Variable frequency control cabinet)

DS (Multifunctional speed regulation)

GT (Jubang Group Co., Ltd.)

3 Main technical parameters

4 Description of options and accessory functions

5 Flexible configurable solution

Cabinet type	Secondary circuit diagram	Control principle	Application features
One-driven-one (cabinet diagram)	Users can achieve frequency conversion switching operation of the motor		The on-site production requirements are high, and the shutdown of the frequency converter can ensure the normal operation of the equipment.
One for use and one for backup (cabinet diagram)		Users can achieve frequency conversion switching operation for motors and backup motors	The on-site production requirements are high, that is, the main motor is shut down and can be replaced with a backup motor to ensure normal production operation.
No bypass (cabinet diagram)		Users can achieve variable frequency operation of the motor	The on-site production requirements are not high, that is, the frequency converter is shut down, and during the repair of the frequency converter, the equipment shutdown does not have a significant impact on production.

6 Selection guidance

7 Introduction to Industry Application Fields

Inverter booster integrated machine (American style/Chinese style)

1 Summary

Inverter booster integrated machine (American/Chinese) is a photovoltaic integrated machine developed by Jubang Group based on the characteristics of the photovoltaic power generation industry chain. In order to meet the needs of customers to reduce costs, reduce construction cycles, and adapt to various environments, in addition to inverter stations, European style box transformers, and American style box transformers, it has also derived a comprehensive and encompassing almost all photovoltaic industry chains. EBS integrates DC distribution, inverter, medium voltage transformer, ring main unit and system monitoring functions, with a standard power dispatch interface, providing a one-stop solution for the inverter unit scheme from the DC output link of photovoltaic cell modules to the grid connection link. It has significant advantages in system integration, environmental adaptation, overall investment cost and fast installation and commissioning

2 Product features

Basic configuration

• DC cabinet+ Inverter+ American style box transformer

Product features

• It can be lifted as a whole, and the installation on the construction site is convenient and fast, greatly reducing the

• construction period of the power station.

• Save construction costs, reduce construction difficulty and uncontrollable risks.

• Standardized unit overall plan, quick debugging and integration into the grid. Maximum system integration, reduce the cost of equipment.

Flexible plan

• Specifications:10kV\~35kV。

• The appearance can be customized according to user needs.

Quality experience

• Three-year warranty commitment, product reliability and safety.

• Simplify on-site installation engineering;

• Easy and convenient maintenance.

Inverter booster integrated machine (European Style)

1 Summary

Inverter booster integrated machine (European style) is a photovoltaic integrated machine developed by Jubang Group based on the photovoltaic power generation industry chain. In order to meet the needs of customers to reduce costs, reduce construction cycles, and adapt to various environments, in addition to inverter stations, European style box transformers, and American style box transformers, it has also evolved into a comprehensive and almost complete photovoltaic industry chain

EBS integrates DC distribution, inverter, medium voltage transformer, ring main unit and system monitoring functions, with a standard power dispatch interface, providing a one-stop solution for the inverterunit scheme from the DC output link of photovoltaic cell modules to the grid connection link. It has significant advantages in system integration environmental adaptation, overall investment cost, and fast installation and commissioning

2 Product features

Basic configuration

• DC cabinet+ inverter+ AC cabinet+ step-up transformer+ medium voltage load switchgear.

Product features

• It can be lifted as a whole, and the installation on the construction site is convenient and fast, greatly reducing the

• construction period of the power station;

• Save construction costs, reduce construction difficulty and uncontrollable risks;

• Standardized unit overall plan, fast debugging and integration into the grid;

Maximizing system integration and reducing equipment costs.

Flexible plan

• Specifications: 10kV\~35kV;

• The appearance can be customized according to user needs.

Quality experience

• Three year warranty commitment, product reliability and safety;

• Simplify on-site installation engineering;

• Easy and convenient maintenance.

Energy storage converter booster integrated cabin (European Style)

1 Features

Integrated design of "transformation" and "upgrading" to achieve integrated product delivery;

Highly integrated, rational and efficient layout, improving space utilization;

Secondary circuit integration, unified measurement, protection, and communication;

Flexible configuration, supporting multi machine parallel connection, PQ, VF and other functions;

1500V system has a wide DC voltage range and flexible DC terminal configuration;

Various applications such as peak shaving and valley filling, peak shaving and frequency regulation, and auxiliary new energy grid connection;

Maximizing system integration and reducing equipment costs.

2 Technical parameters

Energy storage converter booster integrated machine (American Style)

1 Summary

Our company's independently developed three point flat medium voltage high-power energy storage converter, switchgear, and step-up transformer have been optimized and integrated. They have the characteristics of higher power per set of equipment, simple application, flexible installation site selection, and convenient operation and maintenance. The system can directly connect 10/35kV high voltage to the power grid, reducing complex high voltage system design work, shortening the system design cycle, and reducing system design costs.

2 Product features

Intelligent and efficient

• Advanced multi-level inverters circuit topology, high conversion efficiency, and better power quality

• Wide DC voltage range, up to 1500V

• Advanced control algorithms with multiple operating modes available, including constant current, constant voltage, and constant power

• Supports long-term overload operation at 110% rated power and short-term overload capacity at 120% rated power

• Intelligent temperature control air cooling, stable operation over a wide temperature range

• Ultra high power density, smaller volume at the same power level

Safe and reliable

• Comprehensive battery protection and maintenance strategies to improve battery life

• Protection against overcurrent, overheating, overload, overvoltage, short circuit, lightning protection and grounding, etc

• Equipped with zero voltage and high voltage ride through functions, with strong adaptability to the power grid

• Equipped with anti islanding protection to ensure safe operation of the power grid

• Adapt to harsh environments of low temperature, high humidity, and high altitude

• The protection level of the inverter is IP55, and the outdoor installation of the entire machine is convenient

Efficient layout

• Integrated design of inverter, switchgear, and transformer, with simple application

• Complete power level, easy for user system configuration

• Local touch screen monitoring, real-time display, and convenient operation

• Standard Ethernet, RS485, CAN communication interface

3 Technical parameter

GTE2000/2500/3150/3450

Communication side parameters (grid connected operation mode)

Communication side parameters (island operation mode)

JUBANG GROUP CO., LTD.

Address: Wei No.16Rd, Economic Development Zone, Yueqing, Wenzhou, Zhejiang, China
Phone: 0086-577-62799786 Fax:0086-577-62799789
Http://www.mccb.cn
Email: jubanggroup@163.com