Catalogue - SSR and Solid State Relays - GEFRAN - (Version JPG)

guidelines for product selection

LOAD TYPE

GEFRAN's range of solid state relay consists of various families of products, with single-phase and 3-phase versions, with or without aluminum heatsinks, and with logic, analog, potentiometer, and serial line control. Versions with heatsink, called "Power Solid State Relays", are designed to provide the declared rated current at 40°C room temperature (50°C for the Wattcor series] and at 100% of the control signal. To select the best product, we advise you to begin with information on the application.

A careful check of the characteristics of the load to be controlled and of installation conditions will help you make the best choice with regard to price, performance, and duration.

Selection of series based on load type, control signal, activation type.


			zero-crossing		Phase angle
Load type			Logic input	Analog input	Analog input ramp power-up
}	Resistive elements whose ohm value does not change significantly with temperature (low heat coefficient)	Ex. chrome nickel, iron chrome nickel	GTS-L, GTS-T, GTS, GTD, GTZ, W211	GTT, W212	W312
Ì	Resistive elements whose ohm value changes with temperature (high heat coefficient)	Ex. tungstene, molybdenum, molybdenum disilicide, platinum			W312
Ì	Resistive elements whose ohm value changes with time	Ex. Silicon Carbide			W312
	Long-wave infrared heating elements		GTS-L, GTS-T, GTS, GTZ, W211	GTT, W212	W312
	Medium- and short-wave infrared heating elements				W312
E	Resistive heating elements powered by transformer	Ex. molybdenum, graphite			W312
Ì	Inductive loads in general				W312

£ 0

"oj

0 3 13 0

Ifl 0)

"oj

SSR and Solid State Relays - GEFRAN - #15

Precision potentiometer, Temperature sensor, Terminal, Power controller, DC drive