The TD-50 is similar in construction to a type TD-5 relay except for a transistor starting circuit rather than an external contact.
This relay is for use with other solid-state relays whose output is capable of supplying sufficient base current to drive the TD-50 input transistors into saturation. When used in this manner, the logic may be arrange for use in breaker failure schemes or similar applications where various combination of "AND" and "OR" logic are desired.
- Dual indipendent timing
- 0.05 to 30 seconds in 4 different ranges
- Logic AND/OR possibilities