Features:

• 3 m 1005-266
• 3 m, 15 kV screened, large size insulated clips, supplied in carry holdall
• Large range to suit all applications
• Unique locking HV insulated plugs
• None detachable clips for safety with capacitance
• Screened options for high noise environments
• High quality silicon double insulated cable

Applications:

Relative motion between unshielded long leads for a D.C. test causes a variation in capacitance between them. This in turn causes very low frequency currents to flow, creating interference with the D.C. being measured. In addition induced current from nearby cables or radiated noise from corona around HV bushings can interfere with measurements causing unstable readings. This can be greatly reduced by using a screened lead set. The positive (red) test lead is not screened as it is usually connected to ground. The negative (black) lead is shielded with the shield connected to the guard terminal. Induced currents flow to the guard terminal and are therefore not measured. Note: The shielded test lead cannot remove capacitive induced currents from the system. For example, overhead lines moving in the wind can still result in capacitive currents being impressed on the insulation measurement. The effect will be seen as a slow variation in reading. However, this effect can be removed from the measurement by selecting one of the four averaging filters on the S1-1568.

Description:

Megger provide a range of lead sets and clips of different sizes and electrical characteristics for use with Megger 5 kV, 10 kV and 15 kV insulation resistance testers, enabling the user to choose the most applicable lead set for the work in hand. The design of the lead sets is intended to facilitate connection to a variety of de-energised systems for the purpose of making insulation resistance measurements. In all cases it is the responsibility of the user to employ safe working practices and verify that the system is safe before connection. Even isolated systems may exhibit significant capacitance which will become highly charged during the application of the insulation test. This charge can be lethal and connections, including the leads and clips, should never be touched during the test. The system must be safely discharged before touching connections. These lead sets are suitable for use with all current Megger 5 kV, 10 kV and 15 kV insulation resistance testers except the BM11, BM15 and MJ15.