In series to every phase winding of transformer.
For an 800 kVA transformer, the size of the fuse depends on the primary and secondary voltage levels. A common rule of thumb is to use a fuse rating of about 125% of the transformer's full-load current. For an 800 kVA transformer at a standard voltage of 480V, this typically results in a fuse size of around 1,200 to 1,500 Amps, but it's essential to consult the manufacturer's specifications and consider local regulations for precise sizing. Always ensure that the fuse is selected based on both the transformer and application requirements.
An ELSP is a current limiting fuse used in series with the primary fuse of a transformer.
1o amper
50 amp
Yes, but it's usual to have fuses on both sides of the transformer.
the INside
Lower the rating of the primary fuse feeding the transformer.
Sounds like you might have a blown transformer, or a blown fuse on the transformer. Hope for the fuse. Its on the Furnace. Be sure your white wire is on the heat side of the thermostat, and the red wire is on the correct terminal also. The transformer can be checked with a voltmeter.
Sounds like the wrong size fuse protection was used. The transformer should be protected to its kva capacity.
Definitely NOT! An open circuit (across a melted fuse for example) on the secondary side of a current transformer is subject to a dangerously-high voltage, so a fuse must not be fitted. The secondary side of a CT must never be open circuited.
There are two types of pole-mounted fuse. One type is a high-voltage fuse, intended to protect the transformer. The other type is a low-voltage fuse, intended to protect the cable or line supplied by the secondary winding of that transformer. The current ratings of these fuses depend entirely on the current ratings of the devices they are there to protect.