Grounding Dga Monitor; Figure 11 Optpsu1 Power Supply Unit Cable Glands And Connectors - Vaisala Optimus OPT100 Installation Manual

OPT100 Installation Guide
1
Figure 11 OPTPSU1 Power Supply Unit Cable Glands and Connectors
1 Ground terminal
2 AC in: Mains power input. 100 ... 240 VAC, 50 ... 60 Hz, 10 A
3 Spare
4 Spare
5 Relay out: Relay output. Max 250 VAC, 10 A
6 Relay control in: Relay control from DGA monitor
7 DC out: DC out to DGA monitor. 24 VDC, 20 A
4.3 Grounding DGA Monitor
• Grounding cable with max 16 mm
the DGA monitor and the power supply unit to the grounding point(s).
• Cable stripping tool
• Phillips head screwdriver
• Metal file
• Multimeter
1. Locate the ground terminals on the underside of the DGA monitor and the power supply
unit, and find a good grounding point on the transformer or the surrounding structures.
See Figure 10 (page 29)
2. Clean the grounding point of rust for a good connection.
3. Ground the DGA monitor:
a. Run the cable from the ground terminal to the grounding point, and secure it so it
does not hang loose.
b. Connect the cable to the grounding point on the DGA monitor.
c. Connect the other end of the cable to the grounding point.
d. Measuring the resistance from the ground terminal to the grounding point to verify
the grounding.
4. Repeat step 3 to ground the power supply unit as well.
30
2 3
and Figure 11 (page
4 5
2
(AWG5) conductor. Enough to reach from
30).
M211857EN-F
6 7