Eaton 150DHP-VR, Instruction Handbook Manual

33

Instruction Book    

IB182017EN   February 2017   www.eaton.com

5kV, 7.5kV, & 15kV DHP-VR

Replacement Circuit Breaker



 NOTICE

IF THE SPRINGS ARE TO BE CHARGED ON A CLOSED BREAKER, NO 

CLICK IS HEARD AT THE END OF CHARGING OPERATION. DISCONTINUE 

CHARGING AND REMOVE THE MAINTENANCE TOOL AS SOON AS 

“CHARGED” FLAG IS FULLY VISIBLE. CONTINUE ATTEMPTS TO FURTHER 

CHARGE MAY RESULT IN DAMAGE TO THE MECHANISM.



 WARNING

ALWAYS REMOVE THE MAINTENANCE TOOL AFTER CHARGING THE 

SPRING. FAILURE TO REMOVE THE MAINTENANCE TOOL FROM THE 

BREAKER COULD CAUSE INJURY TO PERSONNEL AND/OR EQUIPMENT 

DAMAGE IF THE BREAKER WAS TO CLOSE.

Close and trip the breaker by pushing the close lever then the trip 

lever (Figure Set 3.3).

5.5   VACUUM INTERRUPTER INTEGRITY

Using a dry lint-free cloth or a paper towel, clean all the insulating 

surfaces of the pole units. Conduct a vacuum interrupter integrity 

check as described in Section 6.

5.6   INSULATION

Check breaker primary and secondary insulation per Section 6.

5.7   CONTACT EROSION AND WIPE

Manually charge the closing springs and close the breaker. Check 

contact erosion and wipe as described in Section 6.

5.8   PRIMARY CIRCUIT RESISTANCE

Check the primary circuit resistance as described in Section 6. The 

resistance should not exceed the values specified. Record the values 

obtained for future reference.

5.9   SNUBBER ADJUSTMENT



 WARNING

FOR ALL TYPE DHP HOUSINGS, THE ADJUSTMENT STEPS OUTLINED 

IN THIS PARAGRAPH MUST BE PERFORMED BEFORE INSTALLING A 

REPLACEMENT DHP-VR CIRCUIT BREAKER. FAILURE TO COMPLETE THESE 

STEPS COULD RESULT IN EQUIPMENT DAMAGE AND/OR IMPROPER 

OPERATION.

Before racking a breaker into any and all housings, the snubber bolts 

must be adjusted as outlined in steps 1 and 2. Refer to Figures 3.4, 

3.6, 3.8, and 5.8 for reference purposes. If a breaker is moved from 

one housing to another, the procedure must be repeated for the 

new housing.

Sttp 1

:   Measure the distance from the floor plate to the underside 

of the current transformer shelf on both sides of the housing in 

line with the location of the snubber bolts on each side of the 

breaker (Figure 5.8).

Sttp 2

:   Adjust the height of the top of the snubber bolt to be 

between 0.0 and 0.031 (0.0 and 1/32) inches below the measured 

height of the current transformer shelf and tighten the locking 

nut.

0.00” to 0.031”

Figurt 5.8. Snubbtr Bolt Adjustmtnt

otte:

N

Reference Section 3 for the 

specific location of the Snubber 

Bolt for each DHP-VR Rating.

5.10   ELECTRICAL OPERATIONS CHECK

After going through the above steps, the breaker is now ready to be 

operated electrically. It is preferred that this check be made with the 

breaker in the Test position in the breaker compartment.
Since the Type DHP-VR Circuit Breaker is for use in existing DHP 

Metal-Clad Switchgear, installation procedures are similar. If it is 

necessary to reference anything in the breaker compartment, refer 

to the original instruction books supplied with the assembly.
Refer to Figure Set 3.3, depending upon the voltage rating of the 

breaker, for any parts identification required during these installation 

procedures
a. The circuit breaker’s faceplate and barriers must be positioned 

properly and securely bolted in position before inserting the 

breaker into the cell.



 WARNING

EXAMINE THE INSIDE OF THE CELL BEFORE INSERTING THE BREAKER 

FOR EXCESSIVE DIRT OR ANYTHING THAT MIGHT INTERFERE WITH THE 

BREAKER TRAVEL.



 WARNING

KEEP HANDS OFF THE TOP EDGE OF THE FRONT BARRIER WHEN PUSHING 

A BREAKER INTO A CELL. FAILURE TO DO SO COULD RESULT IN BODILY 

INJURY, IF FINGERS BECOME WEDGED BETWEEN THE BREAKER AND 

THE CELL. USE THE HANDLES PROVIDED ON THE FRONT OF THE BREAKER 

FACEPLATE, OR USE BOTH FULLY OPENED HANDS FLAT ON THE FRONT OF 

THE FACEPLATE.

b. Position the breaker in front of the cell, and line up the guide 

channel on the rear right hand side of the breaker near the 

floor with the guide rail on the right hand side of the cell floor. 

Once the breaker is aligned with the cell floor guide, push the 

breaker into the cell until the rail latch at the front of the guide 

channel catches in a notch in the guide rail, and prevents further 

movement of the breaker toward the rear of the cell (Figures 5.9). 

The breaker is now in the Test position, and secondary contacts 

can be engaged.

Figurt 5.9. Instrtion of 15kV DHP-VR