motor horsepower): 240 VAC (30 hp) and 480 VAC (50 hp) NEMA sizes: 0, 1, 2, and 3 Disconnecting device: Fusible switch Type: Full voltage non-reversing (FVNR) Enclosure Bus Bars Material: Galvanized steel sheet Material: Copper Thick: 1.
Figure 4 shows a comparison of the RK1 and J fusible switch power loss results from Equation 9 with the data from the calculator.
These protection functions are provided by a relay for the overloads and a circuit breaker or fusible switch for the short circuits.
Note, in the cited paper, it was not specified whether the reported starter power losses corresponded to FVNR or full voltage reversing (FVR) starters and whether a fusible switch or breaker was used.
Each circuit consists of a fusible switch, breaker or motor starter connected to a load.
g] Load factor 0 to1 of fusible switch in secondary branch [I.
loss] is the power loss of the main fusible switch in watts, [I.
To estimate the heat gain from power panelboards, the loss models of the panelboard with main breaker and given by Equation 17 and the panelboard with main fusible switch given by Equation 18 were used in a Visual Basic program that was linked to a spreadsheet.
Bus Bars Vertical bus Horizontal and Horizontal and bars--3 phase Vertica bus Vertical bus bars--3 phase bars--3 phase and ground Breaker Rated Up to 1200 amps 150 to 5000 800 to 5000 amps Current amps Access Only from the Front and rear Front and rear front access access Disconnect Fusible Switch Fusible Switch
LVPCB Devices MCCB MCCB ICCB LVPCB FLVPCB--Fused low-voltage power circuit breaker