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Page A-1
The Heavy Duty Type AZ5 relay is used in the Terranova® 752A to control external functions. As
shown in
, maximum switching capacity for resistive loads varies from 2 A at 30 V DC (or
60 V AC) to 0.4 A at 150 V DC (or 300 V AC).
Protective Circuits for Inductive Loads
A protective circuit or component is recommended when switching inductive loads to suppress
sudden voltage spikes. One method to suppress high voltage spikes in an AC circuit is by using a
“snubber” circuit. A “snubber” circuit consists of a capacitor and resistor across an inductive load.
As shown in
, the “snubber” circuit is parallel to the LOAD which is connected in series
with the Terranova® 752A relay.
Appendix: Note on set point relays
Figure I.
AZ5 relay maximum switching capacity
