To verify that the oil connections are tight, check for leaks during commissioning
when the DGA monitor is pumping oil. Ideally, check the connections again after
the DGA monitor has been running for some time (for example, the next day).
More information
‣
Recommended locations of oil connections (page 15)
‣
Attaching power supply unit (page 37)
3.4.1 Installing oil lines with flexible hoses
• 14‑mm wrench (2 pcs)
• 19‑mm wrench
• 22‑mm wrench
• Flex hose kit, 2 x 10 m (Vaisala item ASM214666SP)
• Adapter kit, ½" NPT (Vaisala item ASM214667SP)
• Adapter kit, 1" NPT (Vaisala item ASM214668SP)
• Adapter kit, 2" NPT (Vaisala item ASM214669SP)
• Optional pipeline valve kit, 10‑mm (Vaisala item ASM214670SP)
• Pressurized air, either a bottle or a compressor
• Container for waste oil with at least 5 liter (1.3 gallon) capacity
Follow these instructions to install oil lines with
flexible hoses. The flex hose kit and adapters
are not delivered with the standard DGA monitor delivery.
When working with oil pipes, hoses, fittings, and adapters:
• Keep parts and tools clean and o the ground. Dirty parts may contaminate
the transformer oil or cause connections to leak.
• Oil pipes, hoses and connection adapters must be dry, without any free
water residue inside. Water inside the oil lines can cause issues with the
OPT100 measurement and water may be carried with the oil to the connected
transformer.
• Use new Swagelokâ adapters (nuts and ferrules) when making new
connections. Do not use third party adapters or used parts from a dierent
connection. Opening and retightening existing oil line connections without
changing the nuts and ferrules is OK as long as the parts appear intact and
you can verify the connections do not leak.
• If you are unsure about the proper use of fittings and adapters, refer to their
manufacturer's instructions online.
CAUTION!
Wear protective eyewear and gloves.
Chapter 3 – Mechanical installation
35
To Next Page
Loading...