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• Kromschroder TZI

Description

Ignition transformers TZI and TGI are designed for high-voltage spark ignition of gas burners with a single-pole output to protective earth (PE). The ignition transformers can also be used on burners with single-electrode operation (SEO); the ignition current and ionization current flow over a common electrode. Ignition transformer TZI must be mounted in a non-contact housing, for example in a control cabinet. It fulfills the requirements for IP 00. Ignition transformer TGI in its die-cast aluminum housing meets the requirements for enclosure IP 65, NEMA 4. It is suitable for on-site mounting near the burner.

Duty Cycles

Transformers can operate, depending on the model, on continuous or intermittent duty in accordance with the technology applied to the burner and the control device. Intermittent duty transformers are designed for specific ON and OFF times. Please check the label of the transformer in question. Note, the duty cycle decreases proportionately if the transformer is subject to ambient temperatures in excess of the design spec., which is 35°C (95°F) in this case.

ED=19% on 3 min. (180s)
The transformer can operate for 34 seconds and should be turned off for the remaining 146 seconds. Since the transformer is only active during burner ignition, and assuming a 5 second spark time, it appears the transformer can attempt six burner ignition trials in 180 seconds, or two per minute.

ED=33% on 3 min.
This notation means the transformer can be switched ON for one minute, and must then be OFF for at least two minutes.

ED=100%
These transformers can operate continuously.