Thermal time delay relay.
Used to delay the application of plate voltage to mercury vapour rectifiers until the cathode had reached a safe temperature.
Tubular glass bulb with two thick multi-strand wire flying leads and three thinner single strand flying leads.
Transfer (Probable) from Victoria: Environment Protection Authority (EPA)
On label stuck on bulb: " STYLE 136787 / SUN-VIC CONTROLS LTD. / Type "602." Control Current must not / exceed 29 MA. Control Circuit Resistance 1800 Ohms. approx. Unless 1 lead is common / to the Control Circuit, the series resistance / must be in 2 parts, 1 in each lead and neither / part must be less than 500 Ohms. / Patent No. 354020 & Others ", " 16.0 : 16.0 mA 17.9.63 "
Type of item
107 mm (Height)
Dimensions of glass tube.