You want to replace a high voltage ignition transformer?

Find the make and type of the burner

• Find the reference on the hood

Example :

BRC TYPE AT 5 ABRS
220 V ip 1.2 A 50Hz
OCCASIONAL SERVICE 33%
MIDDLE MITT 35E
HIGH VOLTAGE DANGER

• Details of the dimensions of the transformers

OR

If you do not have the reference you need to find:

• Power supply voltage: 110/220V-220V-220/380V (by cable or AMP plug)
• Mode of fixation with plate/ without plate/ with stud
• Distance between HV terminals: Horizontal or Perpendicular
• Number of exits 1 or 2
• Exit voltage (example: 2x5000 V or 1x8000 V)
• Type of HV terminal

• Working factor 10%-20%-33%-60% permanent 100%

What is the working factor?

It is the time of functioning of the machine expressed in a percent in relation to a predetermined unit of time by the builder of the transformer (generally 3 minutes) during this the secondary exit power stays stable, after this time the power decreases.

Example :

Transformer working factor 100% works in permanence without modifying the secondary exit power

Transformer working factor 50% for 3 minutes of supplied power the power corrects to the secondary for 1.5 minutes, the exit power declines after that time lapses.

Transformer working factor 33% for 3 minutes of supplied power the power corrects to the secondary for 1 minute, the exit power declines after that time lapses. 

This aspect is important because the cycle of the control box in service of the transformer cannot exceed the working time that said transformer.

Example :

The cycle of the LOA 24 box starts the transformer immediately after the opening of the solenoid valve (pre-ignition) then the solenoid valve opens and then the transformer continues to work until the contact of the second solenoid valve (after ignition). 

The entirety of the cycle lasts 33 seconds; so we can observe that the transformer working at a 8% or 10% working factor like there exists in gas burners (example code 805937 or 407215) would not suffice because the effective working time (or efficiency) would be of 14.4 seconds for an 8% and 18 seconds for a 10%.