Eaton Power Circuit Breaker MDN-C08

Device (Fixed): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: -.

Device (Drawout): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: Removed.

2. With breaker removed from cell, verify that the breaker secondary disconnect pins are fully seated and locked into position by lightly pulling on each wire individually.

Note: Do not exceed 1 lb of force or damage to pin or housing may occur.

3. Ensure all pins are straight without bends, corrosion, or show evidence of arcing.

Device (Fixed): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: -. Device (Drawout): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: Removed. WARNING: REMOVE THE DRAWOUT CIRCUIT BREAKERS FROM THE CASSETTE FOR THE FOLLOWING TESTS. FOR FIXED MOUNTED CIRCUIT BREAKERS, ALL PRIMARY AND SECONDARY POWER IS TO BE REMOVED.

Note: The circuit breaker will be required to be charged, closed, and opened during this inspection procedure.

2. Verify that the breaker is in working order by charging the breaker, closing the breaker, recharging the breaker, and opening the breaker.

Note: The breaker will need to be charged and opened for this inspection procedure.

3. Verify that the circuit breaker will not close if any of the following mechanical conditions exist:

a. If the breaker is equipped with an Undervoltage Release that is NOT energized, and the breaker is charged and opened, depress the ON (close) pushbutton The breaker should not close.

Charge the breaker mechanism springs either using the charging handle or the motor operator

Press the ON pushbutton to close the breaker manually and verify closing by noting the state of the indicating flag

Charge the breaker mechanism springs either using the charging handle or the motor operator. If using the motor operator, disconnect power to it to prevent automatic recharging

Press the OFF pushbutton to manually open the breaker

Press the ON pushbutton to manually close the breaker. Is the breaker closed?

Press the OFF pushbutton to manually open the breaker. Is the breaker open?

Note: Repeat this entire described test procedure three times

Sign off on the manual operation functional testing

Warning: This procedure requires trained personnel with PPE!

Charged the breaker mechanism springs using the charging handle or the motor operator

Closed the breaker by applying rated voltage to the spring release accessory and verified closing by noting the state of the indicating flag

Charged the breaker mechanism springs again using the charging handle or the motor operator

Checked the state of the pop-out trip indicator and reset it if it was 'out'

Pressed the ON pushbutton to manually close the breaker and reset the indicator if it was 'out'

Used the Functional Test Kit to trip the breaker by setting its SELECT TEST switch to INST, then pressing its PUSH TO TEST button

Verified that the trip indicator pop-out button is 'out' and then reset it by pressing the pop-out button

Reset the trip unit by the Reset/Battery Test pushbutton on the front of the trip unit

Device (Fixed): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: -.

Device (Drawout): Position of Poles: Open, Mechanism: Discharged, Device Position in Cassette: Removed.

For Magnum Breakers with Vertically Mounted Primary Disconnects:

1. With breaker removed from cell, verify that vertical adapter nuts and bolts are torqued to 37–43 lb-ft.

For All Magnum Breakers Primary Disconnects:

1. Remove the primary disconnect.