Name: Hach sc200
Brand: Hach
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80459-641-01E Model 6 Motor Control Centers

10/2012 Section 6—Maintaining the MCC

ENGLISH

Circuit Breaker or Disconnect Switch—Verify proper operation of the

circuit breaker or disconnect switch. Inspect switch blades; if evidence of

arcing or excessive heat is present, replace the switch assembly. Exercise

the push-to-trip feature on the circuit breakers.

Operator Mechanism—Verify proper operation of the operator mechanism

(see Figure 89). Test for proper ON, TRIP, OFF, and RESET positions (F-,

K-, and L-frame circuit breakers) or ON, TRIP, and OFF positions (

H-, J-,

M-, or P-frame circuit breakers). Verify proper door interlock operation.

NOTE: Fusible switch operator mechanisms do not have TRIP or RESET

positions.

Fuses—Inspect all fuses and fuse clips (see Figure 90). Replace any parts

showing signs of overheating or arcing.

Starter Contacts—Check the starter contacts (see Figure 91). Replace any

that are badly worn or pitted. (See the contactor instruction bulletin included

with the original shipment.)

Figure 89: Operator Mechanism in the

Tripped Position

Figure 90: Inspecting Fuses

Figure 91: Starter Contacts

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