|FA23926||What is the meaning of the utilization categories AC1 and AC3 for the Tesys contactors?|
The standard utilization categories defines the current making and breaking values for contactors.
They depend on the following:
The type of...
|FA22721||Why are XPE foot switches only available with quick-break contacts whereas older models were available with slow-break contacts?|
For many years it was not possible to comply with the rules on positive opening using quick-break contacts. For this reason products were designed...
|FA163890||What are the differences between 380VAC, 400VAC and 415VAC Mains Supplies and what voltage equipment should I use?|
For many years, mainland Western Europe has used a mains, 3 phase, electricity supply rated at nominally 380VAC 50Hz. The UK used 415VAC 50Hz.
|FA144607||Does the Delta 105 trunking system meet the Part M compliance?|
The Delta 105 trunking system offers products that enable Part M compliance, please contact the technical support team on 0870 608 8 608 for further...
|FA23007||What is the meaning of the items screen-printed on the setting selector switches of the Micrologic and STR electronic control units.|
Standard IEC 60947-2 defines the names of the selector switches.
The meanings of the screen-printed items on the selector switches of the trip units...
|FA142116||Do LC1K and LC1D have mirror contacts? Which ones are those?|
Yes, if those contactors have built in or using ad on auxiliary, in the following circumstances:
TESYS model K contactors :
|FA142074||What is the maximum earth fault loop impedance Zs for the Tesys U? What values are taken into consideration to calculate the Zs values?|
For a TN system, section 413-02-08 of BS7671 defines the maximum earth fault loop impedance based on the following condition being met:
|FA142128||What’s the Earth loop impedance value Zs for the GV3 range?|
Note: For calculation purposes, the single phase
voltage considered to be 240V
|FA142242||What is the maximum surface temperature limit for the TeSys D contactor terminals?|
Thermal image inspection of equipment is becoming a regular part of routine maintenance.
As contactors are switching and carrying power, they can...
|FA142622||Tripping curves for GB2 circuit breakers.|
The tripping curves for the GB2 circuit breakers are displayed below :
Extracted from the Control and protection components 2011/2012 catalogue...