Areva KITZ 101 - Auxiliary supply tests

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If the mains supply has no earth connection, the KITZ interface unit earthing
connection on the rear of the case must be used to connect the unit to a local
(mains) earth.
10.1.4.2 K-Bus earthing
The K-Bus cable screen should only be connected to earth at one point in the
communication system. This will normally involve connecting the cable at the
master station end to the KITZ interface unit earth connection and not at any
other point.
10.1.5 Insulation
Insulation tests only need to be done when required.
Isolate all wiring from the earth and test the insulation with an electronic or
brushless insulation tester at a DC voltage not exceeding 1000V. Terminals of
the same circuits should be temporarily strapped together.
The main groups on the relays are given below:
Auxiliary voltage supply
K-Bus Communication port
Case earth
This test should not be performed on the IEC870 (RS232) communications port.
10.1.6 Equipment required
The KITZ units require the following:
AC/DC voltmeter 0–300V
A portable PC, with Protection Access Software & Toolkit and a K Range relay
are essential for commissioning the KITZ K-Bus/IEC 870 interface unit.
10.2 Auxiliary supply tests
The unit will operate from either a 110V/120V or 220/240V ac auxiliary
supply, or a 24/125V or 48/250V dc auxiliary supply depending on the
version. The incoming voltage must be within the operating range specified in
Table 7.
Nominal Operative
KITZ 101
110/240V ac 87– 265V ac 50/60Hz
KITZ 102
24/125V ac/dc 19 –150V dc
50 –133V ac 50/60Hz
48/250V ac/dc 33 – 300V dc
87 – 265V ac 50/60Hz
Table 7. KITZ auxiliary supply rating.
The green supply indication should be on when the auxiliary supply voltage is
greater than the minimum specified level.