the "fuse", he says, would be the etch on the board = because they
would just peel off with the overvoltage testing of UL = 1459.
HI, DAVE
HOW ARE YOU GOING TO CONTROL AND PROVE THAT THE TRACE WILL HAVE A
CONSISTENT THICKNESS AND WIDTH, AND THAT THE TRACK WILL BURNT AND OPEN
AT THE SAME CURRENT CONSISTENTLY. FOR THIS REASON AND FROM MY
EXPERIENCE DEALING WITH UL. THEY DO NOT ACCEPT TRACE AS AN ALTERNATE
MEANS OF PROTECTION. AS FOR CSA, THEY USUALLY CONDUCT ANOTHER TEST
WITH THE BURN TRACE BYPASS( I.E WITH A HIGHER CURRENT RATED WIRE) AND
THEN REPEAT THE TEST. THEREFORE, YOUR BEST OPTION MAY STILL BE THE
"FUSE".
TRANSFORMER THAT MET UL1950 MAY COST MORE, BUT YOU ONLY HAVE TO
MAINTAIN ONE INVENTORY INSTEAD OF TWO(I.E YOUR COST OF INVENTORY MAY
BE LOWER), IT MAY GENERATES BETTER SALES TO ASSET RATIO, THE
INTANGIBLE COSTS OF SEPARATING AND CONTROL OF THESE TWO TYPES OF
TRANSFORMER IN PRODUCTION MAY NOT WORTH THE COST OF SAVING (YOUR CO.S'
ACCOUNTANT MAY ABLE ABLE TO HELP YOU OUT). YOU ALSO HAVE AN OPTION TO
NEGOTIATE WITH YOUR CURRENT SUPPLIER FOR A BETTER PRICE, IF FAIL,
SEARCH FOR OTHER SUPPLIER. THEY ARE MORE THAN ONE SUPPLIER OUT THEIR
WAITING FOR YOUR BUSINESS.
P.LIM (FORMER EMPLOYEE OF CSA)
REGULARATORY COMPLIANCE COORDINATOR
VTECH ENGINNERING CANADA, LTD.
[email protected]
