- When a circuit breaker is tripped by OCR which operates against the faulty current (Over Current Relay), Trip Alarm switch provides the information regarding the trip of circuit breaker by sending the electrical signal from the mechanical indicator on main cover of main circuit breaker or internal auxiliary switch. (Installed at the inside of circuit breaker)
- When a circuit breaker tripped by faulty current, a mechanical trip indicator (MRB, Manual Reset Button) pops out fro the main cover and the switch (AL) which sends control signal electrically is conducted to output the information occurred from faulty circuit breaker.
- MRB and AL can be operated only when tripping by OCR, but doesn't be operated by Off button and OFF operation of trip coil.
- To re-close a circuit breaker after a trip, press MRB to reset it for closing.
- 2 pcs of electrical trip switch (AL1, AL2, 1a) are provided (Option)
- Trip alarm contact and MRB (Manual reset button) need to be purchased together.
1. Electrical characteristics of trip alarm contact
| Rated voltage (V) | Non-inductive load (A) | Inductive load (A) | Inrush current | ||
|---|---|---|---|---|---|
| Resistive load | lamp load | Inductive load (A) | Motor load | ||
| 8V DC | 11 | 3 | 6 | 3 | Max.24A |
| 30V DC | 10 | 3 | 6 | 3 | |
| 125V DC | 0.6 | 0.1 | 0.6 | 0.1 | |
| 250V DC | 0.3 | 0.05 | 0.3 | 0.05 | |
| 250V AC | 11 | 1.5 | 6 | 2 | |