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1, Hong Kong Electronics Fair (Autumn Edition), 2012
  Hall-Stand No.:GH-J07
  Date: 13 - 16 October 2012
  Venue: Hong Kong Convention and Exhibition Centre
2, Expo Electrica International 2012
  Hall-Stand No.:2003-3
  Date: 6 - 8 June 2012
  Venue: Centro Banamex, Mexico City
3, Hong Kong Electronics Fair (Spring Edition), 2012
  Hall-Stand No.: GH-A15
  Date: 13 - 16 April 2012
  Venue: Hong Kong Convention and Exhibition Centre
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Piezo Switches

A piezo switch is an electrical switch based on the piezoelectric effect.
Long life (50 million cycles)
Easy to clean metal surface
Anti-Vandal IK09/ Sealed IP65(switches mounted on panel)

Further informations

Vandal Resistant Switch

Variety of Actuator
1,000,000 cycles momentary
Anti-Vandal IK09/ Sealed IP65
Stainless steel - Available with LED illumination and engraving

Further informations

New CT generation
New connection facility
The new CT

Further informations

Small size
Simple to mount
Large setting range
High switching performance

Prerequisite for a clean operation
of your components is the right climate in your
enclosure. The right climate can be attained
by a temperature and moisture control system
which is put in place.

Further informations

Inner Temperature Controller For Switchgear Cabinet
Heater
These heaters are used in enclosures where damage from condensation must be prevented, or where the temperature may not fall below a minimum value. The aluminium profile heater body design has a chimney effect and distributes the heat evenly. The pressure clamp connectors save time and simplify installation.
Snap Action Thermostat
Snap Action Thermostat
KSD series is a Small-sized bimetal thermostat with a metal cap,which belongs to thermal relays family .The main principle is that one function of bimetal discs is snap action under the change of sensing temperature, The snap action of disc push the action of the contacts through the inside structure, then caused on or off the circuit finally,It's can be used different insulating materials to satisfy the customers' request ,the main insulator is bakelite, PPS and ceramics etc. It is a small type temperature controller. And it has fixed temperature property, don't need to adjust,reliable action, long life and little wireless interference.
Inner Temperature Controller For Switchgear Cabinet
Regulating and Monitoring
Thermostat (normally closed); contact breaker for regulating heaters.
Thermostat (normally open); contact maker for regulating of filter fans and heat exchangers or for switching signal devised when temperature limit has been exceeded.
EMC Cable Gland
EMC Cable Gland
What does EMC mean?
EMC stands for Electromagnetic compatibility- thus the degree of the influence of feathers or radiations designated who of an installation, equipment or an other electrical or electronic plant goes out.
Plastic Cable Gland
Explosionproof Cable Gland
These Glands are for use with electrical equipment in potentially explosive areas, specially in chemical and petro-chemical industries. These Glands are produced according to 94/9/EC, EN 50014 & EN 50019 and are approved by Ex.
Piezo Switches
Piezo Switches
What are Piezo Switches?
A piezo switch is an electrical switch based on the Piezoelectric Effect.
The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". When the FET is on, current can flow through it as with a conventional metal contact-based switch. After the voltage pulse is dissipated in the gate resistor, the FET turns back "off", its normal high impedance state. The Piezoelectric Effect uses the fact that force applied to certain materials causes stresses that generate this electric charge. In the case of piezo switches, the force could be compressive pressure that causes the (typically disc-shaped) piezo element to bend very slightly like a drumhead.
Thus piezo switches produce a single, brief "on" pulse. This pulse can vary with the amount of pressure which is applied, since higher pressures generate higher voltages which take longer to dissipate. A capacitor may be used to store the charge in order to lengthen the time constant of the gate circuit and therefore the width of the pulse. With additional circuitry this pulse can be extended further or used to change the state of an output from steady "Off" to steady "On" by toggling a flip-flop.
Piezo switches have some interesting advantages over their conventional mechanical counterparts. One is that there are no moving parts necessary for them to do their job. This means the lifetime of such a switch can be ensured to be tens of millions of operations, since there is no wear involved.
Another advantage is that they may easily be completely sealed from the environment and thus made weatherproof. They are often constructed with stainless steel housings such that they are resistant to damage by vandals or heavy use.
Applications
Applications
Vandal Resistant Switch
Vandal Resistant Switch
Vandal resistant switches (sometimes referred to as vandal proof switches or tamper-proof switches) are electrical switches designed to be installed in a location (or device) and application where they may be subject to vandalism or tampering, as in the case of pedestrian crossing switches, or fraudulent or unauthorized use, as in the case of vending machine switches. Vandal resistant switches that are located on devices that are accessible to the public or which are located outside also have to be able to withstand dust, rain, snow, and frequent operation.
Pushbutton vandal-resistant switches are frequently constructed of stainless steel or other durable metals and mounted into panels or housing boxes made out of strong materials, such as polycarbonate plastic, aluminium, or stainless steel. In some cases, the housing may be 1/4" thick, to protect both the switch and the housing from attempts by vandals to damage the switch or housing using blunt force. The housing for vandal proof switches is often secured using security screws (which cannot be unscrewed with regular screw drivers). The height of buttons in the panel is often minimized by using flush-mounting, to make it more difficult to pry them out, a design technique used in ATM banking machines that are located outside. Some vandal-resistant switches are protected against tampering using other approaches, such as hiding the switches behind a locked or screwed-down door-covered panel, or by requiring a key or passcode before the switch will operate the device.
Applications
Circuit Breaker
Circuit Breaker
A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, to immediately discontinue electrical flow. Unlike a fuse, which operates once and then has to be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.
Contactor
Contactor
A contactor is an electro-magnetic switching device (a relay) used for remotely switching a power or control circuit. A contactor is activated by a control input which can be a lower or higher voltage / current than that which the contactor is switching. Contactors come in many forms with varying capacities and features. Unlike a circuit breaker a contactor is not intended to interrupt a short circuit current. Contactors range from having a breaking current of several amps and 110 volts to thousands of amps and many kilovolts. The physical size of contactors ranges from a device small enough to pick up with one hand, to large devices approximately a metre (yard) on a side.Contactors are used to control electric motors, lighting, heating, capacitor banks, and other electrical loads.
Thermal Overload Relay
Thermal Overload Relay
Thermal overload relay combined with contact to protect motors (nominal operating voltage of up to 690 V ac and 800 V dc).
Thermal overload relay is a three-relay.
High Voltage Fuses
Drop Out Fuse
In the electrical distribution utility industry a cutout is a combination fuse and switch used in primary overhead feeder lines and taps to protect stepdown transformers from current surges and overloads.
A cutout consists of three major components: The fuse elements, or fuse links used in most distribution cutouts are tin or silver alloy fuse links that melt (or operate) when exposed to high current conditions. Ampere ratings of fuse elements vary from 1 ampere to 200 amperes.
Cutouts are typically mounted about 20 degrees off vertical so that the center of gravity of the fuse holder is displaced and the fuse holder will rotate by its own weight and dangle when the fuse blows. Tension on the fuse link normally holds an ejector spring in a stable position. When the fuse blows, this tension is released which causes the ejector spring to rapidly pull the unmelted stub of the fuse link out of the fuse holder tube to reduce surge duration and damage to the transformer and fuse holder. This quenches any arc in the fuse holder.
Each fuse holder typically has an attached pull ring that can be hooked by a long fiberglass hookstick operated by a lineworker from the ground, to manually open the switch. While often used for switching, the standard cutout shown is not designed to be manually opened under load. For applications where the switch is likely to be used to interrupt power manually, a "load break" version is available that has an attachment to quench the arc.
Up until the mid 1990s each manufacturer used their own dimensional standards for cutout design; by the late 1990s most cutouts were of an "interchangeable design." This design allows for the interchangeable use of cutout bodies and fuse holders manufactured by different vendors.
The fuse holder may be replaced by a solid blade, which would allow the fuse holder assembly to be used as a switch only.
Cutouts may be used with circuit breakers called reclosers which sense and interrupt brief fault currents and then automatically restore service. After a preset number of operations (such as 3 or 4) the recloser remains open.