NARDA PMM L3-100, User Manual

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6-2 Installation
6-4 Preparation for use
From the mains lines conductor to the case of the unit there is a high
leakage current.
The mains lines conductor is connected to ground via high value capacitors
due to the measurement system to be applied.
Over current protection is not provided in the LISN. The LISN must be
connected to a power mains which has the properly rated mains
protection installed.
The leakage currents between the phases and the earth line generally
exceed permitted limits for typical environments due to internal
capacitors; for this reason it is mandatory to use a current rated
insulating transformer to supply the PMM LISN Network.
PMM LISN Network, the insulating transformer and Equipment Under
Test must be provided by an appropriate current rated contact
breaker or fuses as closest as possible on the supply line and with a
safety indication of equipment operated by.
6-5 Pilot circuit
According to EN 60309 (IEC 309) Normative, the industrial mains plugs and
outlets, with an operating current, are provided with an auxiliary connector
called Pilot Circuit contact.
The Pilot Circuit contact is used to avoid mains plug disconnection
with an operating high current load connected. In this case a current
rated remote control switch shall be provided to allow a safe
automatic mains disconnection.
The Pilot Circuit contact and the remote control switch, connected
according to the following figure example, also allows to check
automatically the protection earth conductor continuity till the Device
Under Test mains connection.
Fig. 6-1 Pilot Circuit connection example
This is a Safety Class I equipment, it is provided with a protective
earth terminal. Before connecting this instrument, ensure that an
uninterruptible safety earth ground is provided from the main power
source to the product protective earth connection. If this instrument
is to be connected to other equipment or accessories, prior to
energizing either unit verify that a common ground exists between
them. Any interruption or loosening of the protective earth ground
conductor, either inside or outside the unit or in an extension cable
will cause a potential shock hazard that could result in personal
injury. Verify the safety earth ground functionality before operation.