Question about using the removal of fuse holder only as an isolation

[psypac10101985]

Greetings all,
Is this sufficient as an isolation - pulling a fuse holder from the cutout? The policy at the company in which I work is that this is insufficient since there may be leakage on the cutout. We use a hotline connector when connecting cutouts - these are removed in addition to the fuse holders being pulled. What is your company's policy? If its not a problem, please mention the company you work for. Thanks from Trinidad and Tobago (state owned utility company).

 

[davidbeach]

Might help if you mention the voltage level in question.

 

[psypac10101985]

The voltage is at 12kV

 

[waross]

If there are transformers connected, they will have a low enough impedance to drop any leakage voltage on the line to zero. However leakage may be a danger on open (unloaded) lines. Why take a chance? Ground out before working on a line.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[psypac10101985]

Bill,
We do ground the lines, I am asking about the isolation only.

 

[Zogzog]

Every utility I have ever worked with requires 2 isolation points.

 

[desrod]

In Quebec, a single fuse cutout is enough but prior to grounding, the lineman will test for voltage to make sure there is no alternate voltage source like a customer generator. For us, a single open point is enough if it could be confirmed visually.

Daniel