Vertical mounting is recommended to allow air to flow unimpeded. Use #6 – 32 screws, flat washers, and lock washers to secure mounting on heat sinks. Use shielded wires for input leads when they are exposed to a source of induced current. Wiring Locate SSRs as far from motor leads as possible to prevent malfunction from induced current. Using a thermal compound between the base of the SSR and the heat sink for heat dissipation is recommended. The recommended heat sink dimensions and material are shown in the table: Output Rating Heat sinks are recommended for all solid state relays depending on ambient temperature and mounting position. (See the Temperature Derating Curves on the following page.) When SSRs are used with inductive loads, suppress the inrush current to half of the peak surge current. If SSRs must be installed in an environment subject to high temperatures or poor ventilation, or if SSRs are mounted collectively, reduce the load current so that it does not approach the ambient temperature-load current recommendation. Make sure applications are dry and well ventilated.
#Idec rss series install
Technical Notes Environment Do not install SSRs near sources of excessive heat. Using a zero-switched SSR will reduce inrush current and prolong lamp life. Lamp Loads Zero voltage switching is ideal for driving incandescent lamps, since the cold filament will not be subjected to a large inrush current. UL Motor Load Ratings (HP Ratings) Part Number Read the technical notes on the following page prior to installing solid state relays.
#Idec rss series series
RSS series relays provide a highly reliable means of switching AC loads when applied properly. RSS relays use high-noise immunity circuitry with a built-in snubber to handle the electrical noise generated by inductive loads. In such cases, use an SSR relay at no more than 75% of the rating. Heater Loads When using solid state relays for driving heaters where the load is switched on and off rapidly and continuously, severe thermal stress will result. Use a relay rated for this surge, which has a 1/2 cycle surge current greater than the maximum applied line voltage the transformer’s primary resistance (approximately 10x rated current). Recommended Loads Transformer Loads Transformer loads sometimes result in severe inrush current when the transformer saturates during the first cycle. Snubbed for 0.5 power factor at rated load Optional fingersafe terminal cover (RSS-CVR).Internal transient protection – built-in snubber.RSS Series Panel Mount Solid State Relays Key features:
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