Megger TM1800, User Manual

Page: 9 / 104

Figure 1.2-1 Protective conductor terminal
CG0757JE ZP-CG01E TM1800 9
1 SAFETy
let. Not doing so may result in fire or electric
shock.
Separate ground wire. The TM1800 case must
also be grounded by the separate protective
ground wire with connection to the Protective
Conductor Terminal on top of the TM1800.
Check the continuity of the protective
ground wire before each use. Make sure the
connector is fastened properly to the TM1800
Protective Conductor Terminal. Make sure
the connection point at the ground system
is fastened properly. Route the wire so that
it is unlikely to be walked on or that it may
loosen accidentally by someone or something
moving near it.
Note: The protective ground wire must not
be loosened while any input connector is at-
tached to the contacts of a high voltage cir-
cuit breaker or another device being subject
to inductive or capacitive coupled interfer-
ence from surrounding high voltage wires.
5]
Connections and disconnections to the
inputs.
All input or output connections and
disconnections must be made only while
the circuit breaker poles are connected to
ground on both sides. Always connect the
TM1800 to ground before making any other
connections to the TM1800.
The Timing M/R module inputs are designed
to handle coupled interference current from
surroundings by active interference suppres-
sion. The protection, though, is relaying on
a current path from the connected inputs to
ground.
The current passing through the wires may
be harmful if there is no current path to
ground since, in that case, the high voltage
may cause an arc.
Before connecting or disconnecting the
TM1800 to a high voltage circuit breaker’s
contacts, make sure the circuit breaker is
closed and connected to ground on both
sides.
The rules regarding connection to protec-
tive ground given above must be followed
closely.
Neglecting these rules may result in fire, elec-
tric shock, or other hazards.
The Timing M/R module inputs are designed
to CAT I Environment – Secondary (signal
level) or battery operated circuits of electron-
ic equipment. Not connected to mains.
DO NOT use the Timing M/R inputs to meas-
ure on circuits in measurement category II, III
or IV.
6]
Heat. The TM1800 must be situated away
from any heat sources such as radiators, heat
registers, stoves, or other products that pro-
duce heat.
7]
Ventilation. Slots and openings in the
TM1800 are provided for ventilation. They
ensure reliable operations of the TM1800,
keeping it from overheating. These open-
ings must not be blocked nor covered during
operation. Do not install the TM1800 in a
closed space, such as a rack or cabinet, unless
proper ventilation is provided through fol-
lowing the manufacturer’s installation proce-
dure. Blocking the ventilation slots prevents
proper airflow and may result in fire, electric
shock or equipment damage. Do not run the
TM1800 with an empty module slot, insert a
Dummy module.
8]
Water and moisture. Do not use the TM1800
near water. To prevent fire or shock hazard,
do not expose the TM1800 to rain or mois-
ture.
Do not touch the plug with wet hands. Doing
so may result in electrical shock.
9]
Accessories. Do not use any accessories not
recommended by the TM1800 manufacturer
as they may cause hazards.
10]
EMC Warning . The TM1800 generates, uses,
and can generate radio frequency energy.
If not installed and used in accordance with
this manual it may cause interference to
radio communications. The TM1800 has
been tested and found to comply with the
limits for measurement equipment designed
to provide reasonable protection against
such interference when used in an industrial
environment. Operation of the TM1800 in
a commercial or residential area is likely to
cause interference, at which case, the user,