Protection equipment range

29 September 2010 Circuit & System Protection

Legrand’s range of protection equipment includes DPX MCCBs, trip-free switches, electronic earth leakage modules and specially designed accessories such as control signalling and motor operator units.

DPX MCCBs consist of a comprehensive selection of user-friendly auxiliaries that offer optimum efficiency, safety and easy installation. They are equipped with thermal magnetic or electronic releases. These MCCBs are available in six frame sizes with capacities of 125 A to 1600 A units up to 100 kA. All MCCBs have settable adjustments to suit the tripping requirements of the installation. Charts for association and discrimination between MCCBs and MCCBs are available, as well as between MCCBs and MCBs.

Control and signalling auxiliaries include fault signals that indicate the state of the contacts or the opening of the MCCB on a fault. Shunt trips and under-voltage releases allow the remote tripping of a DPX. Time lag (800 ms) under-voltage releases also prevent the false tripping in the event of AC supply micro breaks or micro control. These auxiliaries are common to all frame sizes.

New motors for DPX 125 to DPX 1 600 are designed for remote making and breaking of a DPX circuit and automatically reset in the event of a tripping on a fault. A lock prevents operation when working on the line. An electronic test unit is used for checking the operating characteristics of an electronic MCCB. Functions include identification of under-voltage release, monitoring of trip curves, measurement of internal temperatures of the device and memorisation of the number of occasions the device has tripped on a fault since installation.

Residual current relays and separate coils offer residual current protection on large diameter conductors to DPX MCCBs. It is advisable to fit a shunt trip or under-voltage release to the MCCBs or the switches used with them. The smaller frame sizes up to 250 A DPX circuit breakers can be DIN rail mounted under modular or special faceplates.

For more information contact Legrand, +27 (0)11 444 7971, [email protected], www.legrand.co.za

Further reading:

EMI shielding materials application guide
Circuit & System Protection
TE Connectivity’s shielding solutions include electrically conductive elastomers, gaskets, knitted wire mesh, oriented wire, EMI shielding ventilation panels, shielded window, cable shielding and shielding components.

Read more...

---

Clearing the Static: ESD containers and packaging
Actum Circuit & System Protection
         Vacuum forming ESD Electronic components can be damaged by electrostatic discharges. To protect against such damage, electronic assembly parts are often transported or stored in vacuum formed component ...

Read more...

---

Electrostatic discharge chairs
Actum Circuit & System Protection
An ESD chair forms an integral part of grounding within the electrostatic discharge protected area to prevent potential damage to products.

Read more...

---

Conductive ESD footwear
Actum Circuit & System Protection
Conductive ESD footwear is used in conjunction with other grounding devices, such as a wrist strap, cord, and ESD surface mats, to provide a continuous path to ground.

Read more...

---

Clearing the Static: The importance of cleaning in ESD control
Actum Circuit & System Protection
To prevent Electrostatic Discharge (ESD) damage to sensitive electronic assemblies and components, all production, handling, packaging, and storage must take place in an ESD-protected environment.

Read more...

---

Clearing the Static: Staying grounded
Actum Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.

Read more...

---

Smarter protection without disruption
NewElec Pretoria Circuit & System Protection
Designed for operations still running without integrated automation, NewElec’s retrofit-friendly systems let you upgrade performance and safety without overhauling your entire network.

Read more...

---

Circuit breaker for reliable, compliant protection
RS South Africa Circuit & System Protection
Legrand’s low-voltage power distribution portfolio encompasses the DX3 range of miniature circuit breakers, designed to deliver dependable protection in residential, commercial and industrial installations.

Read more...

---

Reducing noise on power supply lines
Future Electronics Circuit & System Protection
Murata has introduced the EMIFIL ESD Series Noise Filters, a breakthrough solution engineered for superior noise suppression and enhanced electrostatic discharge (ESD) protection.

Read more...

---

Clearing the Static: Fundamental principles of static control
Actum Circuit & System Protection
Controlling electrostatic discharge in electronics manufacturing is essential with effective ESD programs built on six key principles.

Read more...

---