Abstract: The present invention is a device for use to install and remove animal guards from bushings, surge arresters and insulators on electrical equipment. The device attaches one end to the receiving end of an animal guard and the opposite end to a telescope stick, hot stick or other suitable sick to support device. This device may be used to install animal guard devices while remaining at ground elevation or at an evaluation above the ground.

Abstract: The present invention is a device for use to install and remove animal guards from bushings, surge arresters and insulators on electrical equipment. The device attaches one end to the receiving end of an animal guard and the opposite end to a telescope stick, hot stick or other suitable sick to support device. This device may be used to install animal guard devices while remaining at ground elevation or at an evaluation above the ground.

Abstract: A loop-back unit for connection at the subscriber's end of a line (15) to provide a loop-back line testing facility, the unit comprising a transformer (1) with a first winding (3) and second winding (5) of relatively high inductance, connected in series across the line, and a third winding (7). In normal operation the subscriber's unit (17) is connected across the second winding and the transformer is transparent to signals on the line. To test the line a tone is applied to the line which is detected by a detector (25) connected across the third winding and in response to the detector output a control circuit (23) operates a switching arrangement (21) to disconnect the subscriber's equipment temporarily from the second winding and apply a test tone across the second winding. The unit is capable of satisfactory operation despite faults in the subscriber's equipment.