Disassembly of abb circuit breaker energy storage mechanism

How is a circuit breaker transported?

Each case is marked with case markings on two sides with indelible black ink. The case markings include information of case number, gross weight, etc. The circuit-breaker is transported in seaworthy packing in ‘OPEN’ position in two parts (in most of the cases).

How do I know if my ABB circuit breaker is bad?

Screws, nuts, bolts, etc. must be tight. After 10,000 operations or after 5 years, it is advisable to contact an ABB service center to have the circuit-breaker checked. Locking rings out of place, loose nuts or screws. Locking rings out of place, loose nuts or screws. Clean with a rough cloth soaked in a suitable solvent.

What causes a breaker to stop working?

Closing of breaker does not take place although there is an indication that the springs are charged. Operating coils does not operate. The toggle joints of the mechanism are incorrectly adjusted. Wrong wiring of the auxiliary circuit. Wrongly adjusted clearances of coil magnets armature. Measure the voltage adjust the coils adjustment screw.

What is the standard arrangement of OHB breaker (with breaker structure)?

Standard General Arrangement Drawing of OHB Breaker (with breaker structure) Aa Terminals (Al. Alloy) 1. For 40.5kV rating creepage distance is 1116mm 2. Mounting holes for mounting of CT on CT structure are 450X450 3. Structure is telescopic and has adjustment holes of 200mm 4. All dimensions are in mm. Fig. 1b.

What should I do if my ABB insulator is damaged?

Check that all parts are included in the delivery. Check the packing list. Check that no parts have been damaged during transport; especially the porcelain insulators. Report any faults immediately to the ABB representative. 4.2.1.3.

How do you change a motor breaker?

Charge the closing spring. Close the breaker. If required then adjust the micro-switch for proper operation. Check the breakers with the auxiliary supply connect while charging at minimum operating voltage of the motor. Take few operations for the new mechanism. Seal various lock nuts of various settings with red paint.