 The TEL1 is basic test equipment an electrician cannot do without. |
| TEL1 is a dual-function test instrument utilized to verify electrical wiring connections and the functioning of earth leakage/residual current detectors devices by forcing the ELCB/RCD to trip. |
| This verifies that the protection device open the mains power supply circuit when a current higher than a certain amplitude circulate into the ground/earth wire (generally around 15mA). |
| This ensures the electrical installation meets safety and regulation requirements. |
| The wiring check is reported on the bright neon lights and the key code is shown on the table located under the tester. |
| The table tells the user if the wires are connected correctly or not and guide the user to solve his fault, if any. However, it does not detect or show if a short circuit is present between the neutral and earth/ground wires as well as does not detect or show if a swap occured between the neutral and earth/ground wires due to the fact that these wires are connected together at the supply transformer or some time, again are connected together by a link, somewhere else in the power distribution system. |
| The wiring integrity checker of the TEL1 uses three large and bright neon lights to detect and display voltage conditions on and between powered electrical wires. |
| These neon lights will lite according to a different sequence related to the wiring conditions of the electrical system. The table located under the tester shows the wiring conditions. |
| The residual current detector or Earth Leakage Circuit Breaker Tester injects and simulates a ground/earth fault current into the earth/ground wire to trip the device under test. The fault current can be increased by rotating the switch to the new higher value to force the device to trip. |
