1. Trouble Shooting with EFL 10 Insulation Faults Flooded cable R b ≠ R aC b ≠ C a Typical Cable Problems Which one is the Proper Fault Location Method ? ▼▼▼▼▼ Recommended Fault Location Method To learn more click on the selected method! ELEKTR NIKA

2. Murray Method The result of Murray measurement is: Lx/L In addition EFL 10 provides: ■ RL loop resistance ■ FaE insulation resistance ■ Rx resistance to fault ■ Lx distance to fault The conditions of accurate results: ■ Ia and Ib < 450 uA ■ Ф wire a=Ф wire b ■ FbE>1000 x FaE ■ FbE>10 MOhm Recommended when only one wire of the tested pair is faulty. ELEKTR NIKA

3. Küpfmüller Method The result of Küpfmüller measurement is: Lx/L In addition ECFL 30 provides: ■ RL loop resistance ■ FaE and FbE insulation resistances ■ Rx resistance to fault ■ Lx distance to fault The conditions of accurate results: ■ Ia and Ib < 450 uA ■ Ф wire a=Ф wire b ■ 0,5>FaE / FbE>2 ■ FaE + FbE>100 x R loop The Küpfmüller method consists of 2 measurements: ■ First measurement with open far end ■ Second measurement with strap on the far end Recommended when both wires of the tested pair are faulty. ELEKTR NIKA

4. 3-Point Method The result of 3 Point measurement is: Lx/L In addition EFL 10 provides: ■ RL loop resistance ■ FaE insulation resistance ■ Rx resistance to fault ■ Lx distance to fault The conditions of accurate results: ■ Ia and Ib < 450 uA ■ The insulation resistance of auxiliary wires must be thousand time as high than that of the faulty one. Recommended when the gauge of wires in a pair are different (two healthy auxiliary wires are necessary) The 3-Point method consists of 3 measurements: ■ First measurement when the measuring voltage is connected to wire a ■ Second measurement when the measuring voltage is connected to the ground ■ Third measurement when the measuring voltage is connected to wire c ELEKTR NIKA

5. Resistance Difference Measurement EFL 10 provides the following results: Ra, Rb, R loop, Δ R, % ELEKTR NIKA

6. Capacitance Unbalance Measurement EFL 10 provides the following results: CaE, CbE, ΔC nF, Δ % ELEKTR NIKA

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