| Customization: | Available |
|---|---|
| Phase: | Three |
| Core: | Core-type Transformer |
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SHM-D motor drive unit is the new intelligent digital control drive mechanism. It can be applied to the whole
range of HM tap changers.
In past decades, the motor drive unit is the conventional system of electric-magnetic contactors with various
mechanical cam switches. Its structure is clumsy with low reliability. According to the statistics, 75% of tap
changer accident are found on MDU. Its mechanical components may easily go loose or corroded under
challenging environment.
Based on cutting edge technologies from automation, astronautic and bullet train industry, Huaming designed
the new MDU SHM-D. It can decrease the failure rate to 0.01%. By increasing on-line monitor functions, the tap
changer operation will be more stable in the future.
Features.
1 All moveable components are run preciously by step motor, their operation accuracy can reach 100%
2 Instead of copper wire, the connection between motor and controller is by optical fiber cable.
3 Non-contact type high-precision sensor replaces traditional signal producer. It has excellent resistance
disturbance capability and ensure excellent performance under various harsh environment.
4 *Various on-line monitor devices are equipped. This can ensure the tap changer and transformer will be
locked and given alarm for abnormal operation. It can even indicate the oil temperature and alarm.
5 *It can detect the vacuum decrease in the vacuum interrupter and alarm.
6 *It can sense the wear out of arcing alloy contact and give signal when its expectancy finishes.
7 Its cabinet box is made of high quality aluminium alloy plate material via compressing and stretching. Its
protection degree can reach IP66.
8 Double-sealed protection are applied on its cabinet
9 All electrical and mechanical components are with capability of disturbance resistance .
10 It can detect the gas inside tap changer or transformer oil and operate the online filter automatically.
11 It can regulate the voltage automatically, saving you the cost of AVR.
12 It can realize parallel operation without extra controller
13 Modular design.
14 High precision position transmitting system
15 It has a variety of communication interface and communication protocol, and provides more choices for
smart grid applications.
* Marked item should be applied in cooperative with the user's request.
Function and Operation condition
1 Function
1 .1 Manual operation and motor operation
1.2 Remote control or local control
1.3 Step-by-step operation, overrunning at special request.
1.4 Local position indication and remote position indication
1.5 Tap position display
1.6 Electrical and mechanical limit switch
1.7 Local operation button
1.8 Operation counter
1.9 Overload protection
1.10 Parallel control
1.11 Restart device
1.12 Protection against overrun
1.13 Standard optical fiber transmitting interface
1.14 Over-current blocking signal input
1.15 BCD signal output
1.16 Contact signal output
1.17 4-20mA or 1-5V analog output signal.
1.18 Operation status signal output.
1.19 Motor drive unit accident detection and locking device
2 Operation conditions
2.1 Ambient temperature -25-60ºC (Special designed low-temperature type can withstand -60ºC )
2.2 Installation vertical inclination is no more than 2%
2.3 No severe sand dust, explosives or corrosive gas is allowed for the site.
WARMLY WELCOME YOU TO GIVE US COMMENT AND SUGGESTION FOR OUR
PRODUCTS. THANK YOU FOR YOUR SUPPORT AND COORDINATION.
WE WOULD LIKE TO PROVIDE OUR CUSTOMER WITH HIGH QUALITY PRODUCT,
EXCELLENT SERVICE AND PREFERENTIAL PRICE.
| 1. | Pre sale service |
| a. | make technical solution |
| b. | send quotation, technical data sheet and drawing |
| c. | prepare power transmission plan, testing plan and shipment plan |
| 2. | In sale service |
| a. | supervise the manufacturing schedule totally in accordance with the plan |
| b. | send photos to customer during every manufacturing process(hold point) |
| c. | inform the customer one week before testing. |
| 3. | After sale service |
| a. | installation and commissioning, training the workers |
| b. | quick response within 12 hours any time |
| c. | provide 12 months guarantee period normally. |
| 1. Q: | What is your delivery time ? |
| A: | Depend on the type of transformer. |
| 2. Q: | What is your payment term? |
| A: | 30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it. |
| 3. Q: | What kind of standard you follow? |
| A: | IEC, ANSI, CSA, GB, etc |
| 4. Q: | What kind of supporting documentation you can provide normally |
| A: | Quotation, outline drawing, manufacturing plan, quality control plan testing plan, financial report, type test report(KEMA, CESI),reference list, etc |
| 5. Q: | What is your normal warranty period? |
| A: | 12 months after transformer operation. |
| 6. Q: | Can u do installation and commission in user's site? |
| A: | Yes, we can send our installation team to user's country for service. |
| 7. Q: | Do you have any experience in this kind of transformer? |
| A: | Yes, we can provide reference list for check. |
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