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Transfer switching equipment
WHKMVTB-12
The WHKMVTB-12 medium voltage automatic transfer switching equipment is used for automatic transfer between two power sources with a rated operating voltage of 12kV and AC 50Hz.
Product Details
Model and Meaning
Technical Specifications
Appearance and dimensions
Others
The WHKMVTB-12 medium voltage automatic transfer switching equipment is used for automatic transfer between two power sources with a rated operating voltage of 12kV and AC 50Hz. This product fills the gap in the domestic 6kV~12kV automatic transfer switchgear field and is an important member of the automatic transfer switch series of Wuxi Hanguang Electric Co., Ltd. The product is suitable for data centers, hospitals, banks, chemical plants, metallurgical industries, mines, High-rise building, large CBD, automated production lines, military facilities, and other places requiring high reliability and strong power supply continuity.
The WHKMVTB-12 medium voltage automatic transfer switchgear is a CB-class, dedicated, and integrated medium voltage transfer switchgear. It features a unique structure com a dedicated BA-IIIH intelligent controller to achieve rigid mechanical interlock plus electrical dual interlock, meeting the performance indicators of relevant standards.
| WHK | MVTB | — | ☐ | / | ☐ | / | ☐ | + | ☐ |
|---|---|---|---|---|---|---|---|---|---|
| Enterprise Code | Product series code | Rated operating voltage | Rated operating current | Breaking current | Controller | ||||
|
Wuxi Han Guang Electrical Appliance Co., Ltd. |
Medium-voltage automatic transfer switch |
12kV | 1250A | 31.5kA | BA-ⅢH |
Medium-voltage automatic transfer switch electrical performance parameters
Technical Specifications
| Serial number | Name | Units | Numerical value |
|---|---|---|---|
| 1 | Rated voltage | kV | 12 |
| 2 | Rated current | A | 1250 |
| 3 | Rated frequency | Hz | 50 |
| 4 | Rated short-time power frequency withstand voltage | kV | 42 |
| 5 | Rated lightning impulse withstand voltage | 75 | |
| 6 | Rated short-time power frequency withstand voltage (fracture) | 48 | |
| 7 | Rated lightning impulse withstand voltage (fracture) | 85 | |
| 8 | Rated short-time withstand current | kA | 31.5 |
| 9 | Rated Peak Withstand Current | 80 | |
| 10 | Rated short-term withstand current (ground connection loop) | 27.4 | |
| 11 | Rated Peak Withstand Current (Ground Connection Loop) | 69.6 | |
| 12 | Rated short circuit breaking current | 31.5 | |
| 13 | Rated short-circuit closing current | 80 | |
| 14 | Short Circuit Duration | s | 4 |
| 15 | Minimum opening time | ms | 20 |
| 16 | Transition time | ≤200 | |
| 17 | DC component | % | 52 |
| 18 | Rated cable charging opening and closing current | A | 25 |
| 19 | Heavy breakdown level during capacitive current opening and closing | C2 | |
| 20 | Electrical Life Class (Automatic Reclosing) | E2 | |
| 21 | Mechanical life rating | M2 | |
| 22 | Electrical Life | Time | 10000 |
| 23 | Mechanical life | Time | 160000 |
| 24 | Conversion ability level | TC-4A | |
| 25 | Rated operating sequence | Automatic reclosing: open-0.3 s-close opening-180s-close opening |
Operating mechanism technical parameters
| Serial number | Name | Units | Numerical value | |
|---|---|---|---|---|
| 1 | Rated operating voltage | Closing coil | V |
DC110, DC220 AC110, AC220 |
| Opening coil | ||||
| Locking electromagnet | ||||
| 2 | Rated operating power | Closing coil | W | 220 |
| Opening coil | ||||
| 3 | Locking electromagnet power consumption | W | 3 | |
| 4 | Energy storage motor power | W | 90 | |
| 5 | Rated voltage of energy storage motor | V | DC110, DC220 | |
| 6 | Energy storage time | s | ≤10 | |
Electrical Intelligent Controller of Medium Voltage Transfer Switch (BA-Ⅲ H)
Working Principle
When a deviation (i.e., an abnormal change in power supply voltage or frequency) is detected in the common power supply, the medium voltage transfer switch appliance automatically switches the load from the common power supply to the standby power supply: if the common power supply returns to normal, it automatically returns the load to the common power supply.
Between 85% and 110% of the rated supply voltage U, if the AC frequency is the rated whisker rate, it should be able to work normally
Note 1: Conversion may be with or without predetermined delay and may have a power-off position
Note 2: When there are two power supplies: common power supply and standby power supply, the medium voltage transfer switch needs to specify a common power supply position
When the two power supplies are backup power supplies for each other, they can also act according to the operation procedure required by the user.
Performance and Features
◆ Basic Functions
It has the functions of over-voltage, under-voltage, over-frequency, under-frequency, over-current, phase loss and reverse phase sequence.
◆ Man-machine operation interface
LCD display, LED indication, key operation, adjustable parameters, multiple languages (Simplified Chinese, English, others).
◆ Communication function
Hardware RS485 communication interface and other types of communication methods realize four remote functions.
◆ Step by step switching function
BA-Ⅲ H monitors the state (closed/open position) of the multi-channel load switch appliance at the lower stage of the medium voltage automatic transfer switch appliance, and gradually adds the load after the medium voltage automatic transfer switch appliance is switched to the standby power supply according to the settable program to prevent excessive inrush current; And the medium-voltage automatic transfer switch appliance gradually disconnects the switch appliance of each load before disconnecting the standby power supply, so as to facilitate the smooth transition of the power supply current, the process is as follows:
1) Under no-load conditions, when BA-Ⅲ H detects the deviation of the common power supply, BA-Ⅲ H issues action instructions in turn as follows:
A) issuing a command to disconnect the load-side switch appliance;
b) sending a command to disconnect the switching electrical appliance on the common power supply side;
c) then issuing a command to close the switch electrical appliance on the standby power side;
d) Finally, the instruction is issued to close the switchgear on the load side step by step.
2) The operation sequence after the common power supply is restored is:
A) Disconnect the load side switch appliance:
b) disconnecting the standby power side switch appliance;
c) Close the commonly used power side switch appliances;
d) Turn off the load-side switchgear step by step.
It can realize the step-by-step switching control of up to 24 load switch appliances, the step-by-step switching interval is adjustable, and the priority of each load switch can be flexibly set.
◆ PT disconnection detection function
When the secondary circuit of voltage transformer (PT) is disconnected, BA-Ⅲ H shall send out a disconnection alarm signal; Self-fault lock, alarm, can't issue action command.
PT disconnection alarm value and return value can be set according to customer needs or actual working conditions.
Outline and installation dimensions (unit: mm)
