Sonel S-36 VLF, Руководство пользователя

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S-36 VLF
– USER MANUAL
12
3.2 Connecting the test equipment
Before connecting the device, make sure that the oil level can be seen in the middle of the oil-level
lens . If this is not the case, it is not permitted to carry out measurements.
Fig. 3.1 S-36 VLF tester connections
High-voltage connection socket
* On rear side: oil-level lens
Ground terminal of high-voltage unit (station ground)
Socket for cable connecting operating unit to high-voltage unit
Ground terminal of operating unit (protective ground)
Before connecting the test device, isolate and secure the equipment in conformity with
EN 50110-1. The requirements of EN 50191 and EN 50110-1 must be met. To connect the device,
carry out the following steps in the order given:
Ground and short-circuit the test object conductors which will not be tested as well as the cable
shield (connect to station ground or auxiliary earth point). The device can be used for testing of
unearthed equipment only, if an auxiliary earth is created.
Establish a conductive connection between the station ground or auxiliary earth and the ground
terminal of the high-voltage unit
.
Establish a connection between the ground terminal of the operating unit and the
protective ground (PE) potential
If the device is powered by Mains Voltage from a grounded Mains Socket, there is no need of
additional grounding by the green/yellow protection ground cable! That’s important to avoid
ground-loops.
Only if the equipment is powered by an isolated (earth-free) Mains, then the control unit must
be connected to an auxiliary earth (e.g. earth spike) by means of the green-yellow protection
ground cable!