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WEG Molded Case Circuit Breakers - User’s Manual

8

WARNING

Hazardous voltage conditions can cause death or severe personal injury. 
Maintain original electrical clearance and creepage spacings at terminations.

3.   MANUAL OPERATION AND THERMAL-MAGNETIC 

TRIP UNIT ADJUSTMENT

3.1.  MANUAL OPERATION

Manual operation of the circuit breaker is controlled by the circuit breaker handle 
and the PUSH-TO-TRIP button in the trip unit. The circuit breaker handle has three 
positions, two of which are shown on the cover with raised lettering to indicate ON 
and OFF. On the handle, ON, OFF, and trip are also shown by a color-coded strip 
for each circuit breaker handle position: red for ON, white for tripped, and green 
for OFF (see Figure 6).

Magnetic 
adjustment 
button 
(3 places)

Thermal- 
magnetic  
trip unit

Push-to-trip 

button

ON

Handle 
position 
indicator

International symbols

Color:

Red

-

-
-

ON

ON
OFF

- TRIP
- OFF (reset)

White
Green

TRIP

OFF

Figure 6:

 circuit breaker manual controls

Summary of Contents for UBW600

Page 1: ...Motors Automation Energy Transmission Distribution Coatings User s Manual WEG Molded Case Circuit Breakers UBW600 ...

Page 2: ...res The recommendations and information contained herein are based on WEG experience and judgement but should not be considered to be all inclusive or covering every application or circumstance which may arise If any questions arise contact WEG for further information or instructions 1 INTRODUCTION 1 1 GENERAL INFORMATION The UBW600 circuit breaker Figure 1 are 600 V ac maximum rated devices with ...

Page 3: ...Amperes ln Fixed thermal Adjustable thermal1 Adjust able magnetic instanta neous Multiples of ln 1 Trip unit rating Fixed rating plug Adjustable rating plug Adjustable short time Multiples of ln 1 UBW600 500 5 to 10 600 500 500 600 2 to 8 600 600 Table 1 available trip unit ratings Notes 1 For adjustable thermal trip units the magnetic setting is a multiple of the maximum thermal setting ...

Page 4: ... circuit breaker has not been damaged during transit or initial handling 2 To install trip unit and any internal accessories remove installed cover screws and cover Note The circuit breaker handle must be in the tripped or OFF position to remove the cover Instructions for installing the trip unit and accessories are supplied with the devices 3 If not already installed mount trip unit and accessori...

Page 5: ...configuration the circuit breaker can be mounted using different styles of hardware The following steps describe how to mount the circuit breaker using standard hardware When special hardware is needed for example with the motor operator the instruction leaflet describing the accessory also describes the special mounting arrangements 6 To mount the circuit breaker perform the following steps a For...

Page 6: ... 438 87 33 3 281 83 34 1 325 33 66 1 719 43 66 0 250 6 35 Radius Circuit breaker handle Load end Figure 4 circuit breaker escutcheon cutout dimensions for 3 pole circuit breakers Note Dimensions in inches millimeters Labels with accessory connection schematic diagrams are provided on the side of the circuit breaker c Position circuit breaker on mounting surface d Install circuit breaker mounting s...

Page 7: ...e terminal cover on circuit breaker cover with mounting screws provided Torque to 20 22 lb in 2 26 2 49 N m Terminal Cat No Terminal material body Screw head type AWG wire range Metric wire range mm Wire type Torque value lb in N m LT3 UBW4001 Aluminum Socket 400 500 2 185 240 Cu Al 275 31 1 Table 2 terminal types Notes 1 Sold in 3 poles kits only 10 When step type terminals Cat No LT3D UBW600 or ...

Page 8: ...andle and the PUSH TO TRIP button in the trip unit The circuit breaker handle has three positions two of which are shown on the cover with raised lettering to indicate ON and OFF On the handle ON OFF and trip are also shown by a color coded strip for each circuit breaker handle position red for ON white for tripped and green for OFF see Figure 6 Magnetic adjustment button 3 places Thermal magnetic...

Page 9: ...TIC TRIP UNIT ADJUSTMENT The magnetic element of each pole of the trip unit can be adjusted by rotating the adjustment buttons on the front face of the trip unit with a screw driver The buttons have several settings as indicated on the nameplate with values in multiples of the trip unit ampere rating In as shown in Figure 7 To adjust the setting rotate each button clockwise until arrow on button p...

Page 10: ...r in the ON position press the PUSH TO TRIP button to mechanically trip the circuit breaker Trip reset and switch circuit breaker ON several times If mechanism does not reset each time the circuit breaker is tripped replace the circuit breaker 4 Check base cover operating handle and handle barrier for cracks chipping and discoloration Circuit breakers should be replaced if cracks or severe discolo...

Page 11: ...ate WEG selling policies or other contractual agreement between the parties This literature is not intended to and does not enlarge or add to any such contract The sole source governing the rights and remedies of any purchaser of this equipment is the contract between the purchaser and WEG NO WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILIT...

Page 12: ... Phone 233 30 2766490 info zestghana com gh INDIA Bangalore Karnataka Phone 91 80 41282007 info in weg net Hosur Tamil Nadu Phone 91 4344 301577 info in weg net ITALY Cinisello Balsamo Milano Phone 39 2 61293535 info it weg net JAPAN Yokohama Kanagawa Phone 81 45 5503030 info jp weg net MALAYSIA Shah Alam Selangor Phone 60 3 78591626 info wattdrive com my MEXICO Huehuetoca Mexico Phone 52 55 53214...

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