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Summary of Contents for WEG UBW120
- Page 1 Motors | Automation | Energy | Transmission & Distribution | Coatings WEG Molded Case Circuit Breakers UBW1200 User’s Manual...
- Page 2 600 V for UL applications, and have integral trip units. Available current ratings are up to 1200 for UL applications. Refer to Table 1 for available trip units and Table 2 for available rating plugs. UBW1200 WEG molded case circuit breakers are listed in accordance with Underwriters Laboratories, Inc. Standard UL 489 and satisfy the requirements of the International Electrotechnical Commission Recommendations No.
- Page 3 (PCB) reaches approximately 90 ºC. For ambient conditions above 40 ºC (104 ºF), derating of the circuit breaker should be considered to avoid exceeding a safe terminal temperature operation range. Consult WEG for recommendations. WEG Molded Case Circuit Breakers - User’s Manual...
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Page 4: Installation
Make sure the circuit breaker is suitable for the intended installation by comparing nameplate date with existing equipment ratings and system requirements. Inspect the circuit breaker for completeness and check for damage before mounting. WEG Molded Case Circuit Breakers - User’s Manual... -
Page 5: Accessory Installation
2.3.1. 800 A and 1200 A Front Connect If not already installed, mount terminals as shown in Figure 2. To do this, terminal cover screws must be first be loosened and the terminal covers removed. Figure 2: terminal installation WEG Molded Case Circuit Breakers - User’s Manual... - Page 6 3.438 (87.31) 1.718 (43.64) 2.50 R (6.35 R) 1.906 (48.41) Handle .188 R 5.587 (4.76 R) (141.91) 1.500 (38.10) 3.187 (80.95) 6.375 (161.92) Front cover cutout Figure 4: circuit breaker escutcheon dimensions WEG Molded Case Circuit Breakers - User’s Manual...
- Page 7 (2.7-3.4 Nm). When using the terminal LT1B2 UBW700, or when prospective fault currents of cabled installations exceed 65 kA (such as NDC applications), the conductors are to be braced in accordance with Figure 5. WEG Molded Case Circuit Breakers - User’s Manual...
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Page 8: Manual Operation
Manual operation of the circuit breaker is controlled by the circuit breaker handle and the push-to-trip button. The circuit breaker handle has three positions, two of which are shown on the cover in raised lettering to indicate ON and OFF. On the handle, WEG Molded Case Circuit Breakers - User’s Manual... - Page 9 3 terms units = 1.719 (43.7) (34.9) 6 terms units = 3.219 (81.8) 2.750 (69.9) 9 terms units = 4.719 (119.9) 4.125 (104.8) Removable terminal 8.250 (209.6) cover Figure 6: circuit breaker manual controls WEG Molded Case Circuit Breakers - User’s Manual...
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Page 10: Circuit Breaker Reset
OFF position. Caution Lack of illumination of the status light does not indicate the terminals of the breaker are deenergized. 4. 310+ TRIP UNIT ADJUSTMENTS Figure 7 Figure 8 WEG Molded Case Circuit Breakers - User’s Manual... - Page 11 135% and will trip as a function of 12 t for higher currents. Continuous current values for each lettered setting are indicated by the chart on the right side of the trip unit. WEG Molded Case Circuit Breakers - User’s Manual...
- Page 12 (C, NO) is available. The wires for this contact exit the left hand side of the breaker and are color coded as follows: Blue = C, and Red = NO. WEG Molded Case Circuit Breakers - User’s Manual...
- Page 13 6. Check circuit breaker mounting hardware, and tighten if necessary. 7. Check area where circuit breaker is installed for any safety hazards, including personal safety and fire hazards. Exposure to certain types of chemicals can cause deterioration of electrical connections. WEG Molded Case Circuit Breakers - User’s Manual...
- Page 14 NOTES WEG Molded Case Circuit Breakers - User’s Manual...
- Page 15 NOTES WEG Molded Case Circuit Breakers - User’s Manual...
- Page 16 Changzhou – Jiangsu Phone: +86 519 88067692 info-cn@weg.net For those countries where there is not a WEG own operation, find our local distributor at www.weg.net. WEG Group - Automation Business Unit Jaraguá do Sul - SC - Brazil 55 (47) 3276-4000 Phone: + automacao@weg.net...
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