Megger TM1700 Series, User Manual

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Figure 1.2-1 Protective conductor terminal
BL1448GE ZP-BL16E TM1700-sEriEs 7
1 sAFETy
tective ground wire with connection to the
Protective Conductor Terminal on top of the
instrument. Check the continuity of the pro-
tective ground wire before each use. Make
sure the connector is fastened properly to
the instrument Protective Conductor Termi-
nal. 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 some-
one 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 in-
strument to ground before making any other
connections to the instrument.
The Timing M/R section 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
instrument 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 section 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 instrument 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 in-
strument are provided for ventilation. They
ensure reliable operations of the instrument,
keeping it from overheating. These open-
ings must not be blocked nor covered during
operation. Do not install the instrument 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.
8]
Water and moisture. Do not use the instru-
ment near water. To prevent fire or shock
hazard, do not expose the instrument to rain
or moisture.
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 instrument manufac-
turer as they may cause hazards.
10]
EMC Warning . The instrument generates,
uses, and can generate radio frequency en-
ergy. If not installed and used in accordance
with this manual it may cause interference
to radio communications. The instrument has
been tested and found to comply with the