Product Description

SHM-D Digital Control Motor Drive Unit of on-load tap changer

General

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, CZPT 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.
 

Main technical data

This technical data is only applied to the standard design. It may vary according to different request in
technical specification. CZPT reserves the right to revise the data in this table.

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.

 

Our Best Service For You

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 1 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.

FAQ For You

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.

Our advantages:
Quality Assurance
–From the very beginning, VILLE ensures quality in every step to achieve the best quality.
 Experience Sharing
–With more than 30 years’ experience in power industry, VILLE brings you an optimized solution.
 Global Service
–Wherever you are, VILLE global network will support and provide you with value.
 Quick Response
–In response to your needs without delay, VILLE  knows the value of your time.

Thanks for choosing VILLE as your reliable partner and
please trust both of us will create a brilliant future!

What is a drive shaft?

If you notice a clicking noise while driving, it is most likely the driveshaft. An experienced auto mechanic will be able to tell you if the noise is coming from both sides or from 1 side. If it only happens on 1 side, you should check it. If you notice noise on both sides, you should contact a mechanic. In either case, a replacement driveshaft should be easy to find.

The drive shaft is a mechanical part

A driveshaft is a mechanical device that transmits rotation and torque from the engine to the wheels of the vehicle. This component is essential to the operation of any driveline, as the mechanical power from the engine is transmitted to the PTO (power take-off) shaft, which hydraulically transmits that power to connected equipment. Different drive shafts contain different combinations of joints to compensate for changes in shaft length and angle. Some types of drive shafts include connecting shafts, internal constant velocity joints, and external fixed joints. They also contain anti-lock system rings and torsional dampers to prevent overloading the axle or causing the wheels to lock.
Although driveshafts are relatively light, they need to handle a lot of torque. Torque applied to the drive shaft produces torsional and shear stresses. Because they have to withstand torque, these shafts are designed to be lightweight and have little inertia or weight. Therefore, they usually have a joint, coupling or rod between the 2 parts. Components can also be bent to accommodate changes in the distance between them.
The drive shaft can be made from a variety of materials. The most common material for these components is steel, although alloy steels are often used for high-strength applications. Alloy steel, chromium or vanadium are other materials that can be used. The type of material used depends on the application and size of the component. In many cases, metal driveshafts are the most durable and cheapest option. Plastic shafts are used for light duty applications and have different torque levels than metal shafts.

It transfers power from the engine to the wheels

A car’s powertrain consists of an electric motor, transmission, and differential. Each section performs a specific job. In a rear-wheel drive vehicle, the power generated by the engine is transmitted to the rear tires. This arrangement improves braking and handling. The differential controls how much power each wheel receives. The torque of the engine is transferred to the wheels according to its speed.
The transmission transfers power from the engine to the wheels. It is also called “transgender”. Its job is to ensure power is delivered to the wheels. Electric cars cannot drive themselves and require a gearbox to drive forward. It also controls how much power reaches the wheels at any given moment. The transmission is the last part of the power transmission chain. Despite its many names, the transmission is the most complex component of a car’s powertrain.
The driveshaft is a long steel tube that transmits mechanical power from the transmission to the wheels. Cardan joints connect to the drive shaft and provide flexible pivot points. The differential assembly is mounted on the drive shaft, allowing the wheels to turn at different speeds. The differential allows the wheels to turn at different speeds and is very important when cornering. Axles are also important to the performance of the car.

It has a rubber boot that protects it from dust and moisture

To keep this boot in good condition, you should clean it with cold water and a rag. Never place it in the dryer or in direct sunlight. Heat can deteriorate the rubber and cause it to shrink or crack. To prolong the life of your rubber boots, apply rubber conditioner to them regularly. Indigenous peoples in the Amazon region collect latex sap from the bark of rubber trees. Then they put their feet on the fire to solidify the sap.

it has a U-shaped connector

The drive shaft has a U-joint that transfers rotational energy from the engine to the axle. Defective gimbal joints can cause vibrations when the vehicle is in motion. This vibration is often mistaken for a wheel balance problem. Wheel balance problems can cause the vehicle to vibrate while driving, while a U-joint failure can cause the vehicle to vibrate when decelerating and accelerating, and stop when the vehicle is stopped.
The drive shaft is connected to the transmission and differential using a U-joint. It allows for small changes in position between the 2 components. This prevents the differential and transmission from remaining perfectly aligned. The U-joint also allows the drive shaft to be connected unconstrained, allowing the vehicle to move. Its main purpose is to transmit electricity. Of all types of elastic couplings, U-joints are the oldest.
Your vehicle’s U-joints should be inspected at least twice a year, and the joints should be greased. When checking the U-joint, you should hear a dull sound when changing gears. A clicking sound indicates insufficient grease in the bearing. If you hear or feel vibrations when shifting gears, you may need to service the bearings to prolong their life.

it has a slide-in tube

The telescopic design is a modern alternative to traditional driveshaft designs. This innovative design is based on an unconventional design philosophy that combines advances in material science and manufacturing processes. Therefore, they are more efficient and lighter than conventional designs. Slide-in tubes are a simple and efficient design solution for any vehicle application. Here are some of its benefits. Read on to learn why this type of shaft is ideal for many applications.
The telescopic drive shaft is an important part of the traditional automobile transmission system. These driveshafts allow linear motion of the 2 components, transmitting torque and rotation throughout the vehicle’s driveline. They also absorb energy if the vehicle collides. Often referred to as foldable driveshafts, their popularity is directly dependent on the evolution of the automotive industry.

It uses a bearing press to replace worn or damaged U-joints

A bearing press is a device that uses a rotary press mechanism to install or remove worn or damaged U-joints from a drive shaft. With this tool, you can replace worn or damaged U-joints in your car with relative ease. The first step involves placing the drive shaft in the vise. Then, use the 11/16″ socket to press the other cup in far enough to install the clips. If the cups don’t fit, you can use a bearing press to remove them and repeat the process. After removing the U-joint, use a grease nipple Make sure the new grease nipple is installed correctly.
Worn or damaged U-joints are a major source of driveshaft failure. If 1 of them were damaged or damaged, the entire driveshaft could dislocate and the car would lose power. Unless you have a professional mechanic doing the repairs, you will have to replace the entire driveshaft. Fortunately, there are many ways to do this yourself.
If any of these warning signs appear on your vehicle, you should consider replacing the damaged or worn U-joint. Common symptoms of damaged U-joints include rattling or periodic squeaking when moving, rattling when shifting, wobbling when turning, or rusted oil seals. If you notice any of these symptoms, take your vehicle to a qualified mechanic for a full inspection. Neglecting to replace a worn or damaged u-joint on the driveshaft can result in expensive and dangerous repairs and can cause significant damage to your vehicle.