# Label Description Cable diameter Wrench
size
6 Relay control
in
Relay control from DGA monitor. Use
Vaisala cable CBL210539.
7 … 12 mm
(0.28 … 0.47 in)
24 mm
7 DC out DC output to DGA monitor, 24 V DC, 20 A.
Use Vaisala cable CBL210544.
9 … 16 mm
(0.35 … 0.63 in)
30 mm
4.3 Interior parts
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
17
18
19
16
Figure 14 Inside DGA monitor cabinet
1 Valve 5 (bleed valve). Must be
manually accessed during
initialization and uninstallation.
2 Valve 4
3 Oil block
4 Valve 2
5 Valve 3
6 Valve 1
7 In-oil measurement of hydrogen and
moisture
8 Oil out
9 Oil in
10 Terminal blocks for RS-485 output
(Y1) and relay control (Y2)
11 Circuit breakers: main breaker (F2)
and breaker for heating power (F1)
12 Terminal block for DC in (Y3)
13 Surge arresters
14 Circuit breaker for auxiliary device
(F3) (Y4)
15 Processing unit
16 Ethernet connectors:
ETH0 Connection for SCADA, wired
to external Ethernet
connector
ETH1 Service port for temporary
local use, with IP address
192.168.28.2
17 Auxiliary device and terminal blocks
(Y5)
18 Control unit
19 Optical measurement module for
extracted gases
Chapter 4 – Electrical installation
41
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