Planning The Installation - Vaisala MHT410 Guía Rápida

Recommendation
Recommended:
Straight section in the
radiator's outlet pipe.
Possible alternative:
Wall of the oil tank, high
enough from the bottom to
enable proper oil movement.
Not recommended:
Drain valve of the oil tank.
2.2 Planning the Installation
• Choose the installation location on the transformer (see
Locations (page 8)).
CAUTION!
from the valve specifications. The correct thread of the valve is female 1.5"
NPT. Do not install the transmitter in a valve with a different thread. For
example, the R thread is incorrect. If you use a different thread than female
1.5" NPT, your equipment may be damaged and the connection is not leak
tight. If you are not sure which thread your installation valve has, verify the
thread with a 1.5" NPT thread gauge.
• Make sure the oil type of the transformer matches the one configured for MHT410
(mineral oil, natural ester oil, or synthetic ester oil).
• Make sure you have all the required tools for installing the transmitter. The required tools
are presented in the front foldout pages and in the installation instructions.
• Choose the output signals: analog and/or digital.
Description
This is the best location for the transmitter.
The oil is measured in flow, which makes the oil sample
representative and instant. This is essential especially for correct
oil moisture measurement.
Compared to the radiator inlet pipe, oil in the outlet pipe is
cooled, preventing unnecessary heating of the sensors and the
transmitter.
An instrumentation valve is recommended. This is a typical valve
that is meant for oil analysis.
Moisture response time is moderate depending on the oil volume
and transmitter installation.
DANGER!
damage to transformer:
Pay attention to transmitter installation depth
and possible energized parts inside the power
transformer to minimize electric shock hazard
and equipment damage.
The moisture response can be poor due to static oil flow. There is
also a risk of separated water (leading to wrong results) and oil
sludge (risk of sensor contamination and clogged filters).
Make sure the installation valve and threads are appropriate
Chapter – Installation
Severe risk of death and of
Recommended Installation
9