Safety Measures; General Information Regarding Insulation Measurement - BEHA UNITEST TELARIS ISO Instruction Manual

3.0 Safety Measures

The UNITEST TELARIS ISO has been designed
and checked in accordance with the safety regula-
tions for Electronic test and Measurement
Instruments EN 61010 and IEC 61010, and left
our factory in a safe and perfect condition.
The respective accident prevention regulati-
ons established by the professional associati-
on for electrical systems and equipment must
be strictly met at all times.
In order to avoid electrical shock, the valid
safety and VDE regulations regarding excessi-
ve contact voltages must receive the utmost
attention when working with voltages excee-
ding 120V (60V) DC or 50V (25V)rms AC. The
values in brackets are valid for limited ranges
(as for example medicine and agriculture).
If the operator's safety is no longer guaran-
teed, the instrument is to be put out of servi-
ce and protected against use. The safety can
no longer be guaranteed if the instrument:
• obvious damage
• does not carry out the desired measurements
• has been stored for too long under unfavourable
conditions
• has been subjected to mechanical stress during
transport.
The instrument may only be used within the
operating ranges as specified in the technical
data section.
Safety Measures / General Information
Avoid any heating up of the instrument by
direct sunlight to ensure perfect functio-
ning and long instrument life.
The opening of the instrument for fuse repla-
cement, for example, may only be carried out
by professionals. Prior to opening, the instru-
ment has to be switched off and disconnec-
ted from any current circuit.
4.0 General Information regarding Insulation
Measurement
Prior to definitive commissioning, insulation mea-
surement has to be carried out in electrical instal-
lations. This measurement is of basic importance,
as insulation measurements (protection against
hazardous body currents) are used, for example,
as only measurement for fire protection. If a limi-
ted fault current flows between two conductors
due to an insulation error, a heating up or even a
fire will be the consequence. The only possibility
of detect such an error consists of an insulation
measurement.
Insulation resistance measurement is carried out:
• between all active conductors (e.g. L1, L2, L3)
towards ground or towards the grounded
protective conductor (PE, N)
• between protective conductor (PE) and neutral
(N)
• between external conductors (e.g. L1, L2, L3).
This measurement may be omitted if the res
pective line is equipped with a grounded
conductor or shield.
The following has to be respected:
• The measurement must be carried out for each,
individual (switched-off !!) current circuit.
• No load should be connected.
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