Bosch BPT-C 200 Betriebsanleitung Seite 155

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Bosch Power Tec GmbH
7. Measure the mains voltage (AC), i.e. phase to phase and phase to PE.
(The measured voltage must be within the parameters given in the
technical specifications. (Technical specifications, p. 83))
8. Measure the DC voltage and polarity
Please note the following here:
Check and measure each DC input separately (directly on the DC

connection bars)
 For levels of performance 200 kVA and 300 kVA: Permissible tolerance
530–1000 V
For level of performance 350 kVA: Permissible tolerance 580–1000 V

9. Measure the auxiliary power supply
Please note the following here:
The voltage must be within the specified parameters (Technical

specifications, p. 83)
The earthing resistance is the electrical resistance between the
protective earth connection and the reference potential of the ground.
Earthing resistance is measured by running an alternating current over
the earthing conductor, the earthing line and the earth-spreading
resistor. The earthing resistance can be measured directly or indirectly.
For direct measurement, an earth probe is required. For indirect
measurement, the approximate earthing resistance is determined using
an 'earth-electrode loop resistance measurement', without the use of a
probe.
R ≤ U /I
A L F
R : Earthing resistance (protective earth)
A
U : Contact voltage
L
I : Residual current
F
10.Open external disconnectors (DC side, AC side, including auxiliary power
supply)
11.Measure the earthing resistance
Please note the following here:
Operating manual of the measuring equipment

12.Close external disconnectors
13.Close internal circuit breakers
14.Close the front door
■
The measurements have been taken
Installation | 63
BPT-C 200, 300, 350 | Operating manual