# See the attached file for questioins

**Thehonest**

3.6 (6)

3.5 (160)

A VarleyBridge is connected to a faulty three-core copper cable by two identical copper leads of resistance *R _{l}*.

(a) Show that for the initial reading (connection to earth);

2*R _{x}* = 2

*R*–

_{c}*R*

_{i}(b) By multiplying the rhs brackets and collecting terms, show the effect of the leads is given by:

(c) Determine the distance to the fault by modifying the expression in (b) and using

(d) Using

(e) Determine the distance to a fault on a 200 m, 120 mm^{2} copper cable

if copper 10 mm^{2} test leads of length 10 m are used and .

- 5 years ago

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