Bosch FSA 050 - Insulation Analysis; Standard Insulation Analysis

1 689 989 102 2019-05-24| Robert Bosch GmbH
30 | FSA 050 | Operationen
5.5 Insulation analysis
DANGER – Risk of electric shock from high
DC voltages during insulation analysis.
Electric shocks resulting from contact with
live parts can cause injuries or heart failure
or even be fatal.
¶ Insulation analysis on hybrid vehicles,
electric vehicles or equipment is only to
be performed by trained power systems
engineers.
¶ Avoid contact with live parts when
performing insulation analysis.
! Depending on the interference voltage detection
limit value set for insulation analysis (refer to
Section 5.1), implementation of insulation analysis
by the FSA050 may be inhibited on exceeding the
limit value to guard against damage to the device.
The supply voltage applied is displayed. Voltages
above the set limit value are indicated by the buzzer.
Automatic discharge
After performing insulation analysis, capacitive circuits
are discharged automatically on releasing <TEST>.
! Before connecting the measurement leads, the circuit
to be tested must be fully discharged and reliably
isolated. Therefore, a voltage measurement should
always be carried out before insulation analysis!
i During insulation analysis, the symbol flashes on
the LCD as long as the test voltage is being applied
to the circuit to be checked.
5.5.1 Standard insulation analysis
1. Connect the measurement leads or the remote
sensor to the circuit to be tested.
2. Set the rotary switch to the correct position (fig. 2,
pos.11) (50V, 100V, 250V, 500V or 1kV).
 ln5 appears on the LCD.
3. To start insulation analysis, press and hold <TEST>
(fig.2, pos.1).
 The insulation resistance value is displayed in both
analog and digital form, together with the actual
test voltage value.
i With <TEST> pressed, the insulation analysis can
beextended as required by additionally pressing
</OK> (fig.2, pos.2). The lock symbol  appears
and <TEST> can be released. Press <TEST> or
</OK> again to cancel the lock.
! In contrast to stand-alone operation of the FSA050,
during a standard insulation analysis with the
CompacSoft[plus] software, the insulation voltage
remains applied to the circuit that is to be tested
until <TEST> is pressed on the FSA 050 or <F3> is
pressed in the CompacSoft[plus] software.
i With the lock applied, the leakage current,
measurement time or test voltage can be displayed
by repeatedly pressing <µA/s/V>.
4. Release <TEST> to end insulation analysis.
5. Disconnect the measurement leads or remote sensor
once the analog display shows zero.
6. Switch off the FSA 050.
i The FSA 050 is switched off automatically after
15minutes if no further measurements are taken.