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EDS309x_D00012_03_M_XXEN/11.2014
5. Connecting the locating current injector
5.1 Disconnecting insulation monitoring device
During insulation fault location using the EDS309… an existing insulation monitoring device must
be disconnected from the system for the duration of the fault location if its internal resistance is
R
i
< 120 k
Ω
. During this process the connection to the system must be interrupted on all poles, shut-
ting down the supply voltage to the insulation monitoring device is insufficient. On the usage of
such a device with
R
i
≥
120 k
Ω
the effect is negligible, disconnection is not required in this case. How-
ever the PGH18… will affect the measurement made by the insulation monitoring device.
5.2 Locating current injector in an electrically isolated IT system
For insulation fault location in electrically isolated systems using the EDS3096PG, the integrated
voltage source G in the PGH186 supplies a locating voltage.
The locating voltage DC 50 V is provided by the PGH186 at the socket L1(+). Make sure that this sock-
et is coupled to the system to be monitored during insulation fault location, only then will the inte-
grated voltage source in the PGH186 be effective.
Hazard due to excessively high locating voltage!
Check the information on the nameplate to ensure the devices to be connected
are suitable for the supplying system. The operation of the PGH18… and possi-
bly the power supply unit with an incorrect supply voltage can cause irreparable
damage to the devices.
Prior to commissioning check whether all system components are correctly
connected together.
Note that the active conductors in the system to be checked must be coupled
together via loads or the electrically isolated power supply.
CAUTION
U
S
= 0 V
IT-System
PSA...
EDS195P
PGH186
PE
R
F
L2(L-)
L1(L+)
2
3
1
G
+
-
L1
Summary of Contents for EDS3090
Page 6: ...Table of Contents 6 EDS309x_D00012_03_M_XXEN 11 2014...
Page 26: ...Considerations prior to use 26 EDS309x_D00012_03_M_XXEN 11 2014...
Page 62: ...Frequently Asked Questions 62 EDS309x_D00012_03_M_XXEN 11 2014...
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