Voith 91868550, Instructions And Operating Manual

Page: 6 / 27

Instruction and Operating Manual
Overspeed Protector CTO-B45202
2019 / 02
J.M. Voith SE & Co. KG │ Division Digital Ventures
Page: 6 / 25
918 3626018864 en D – 74564 Crailsheim Version: 2.1
2 Safety information
2.1 Definition of symbols and warnings
Symbol
Damage/harm
to ...
Signal word Definition Consequences
Persons
Property EX-
PROTECTION! Notes to
Ex-protection Explosion hazard
Persons DANGER! Imminent danger Fatal or most serious
injuries (crippling)
Persons WARNING! Dangerous situation possible Fatal or most serious
injuries possible
Material ATTENTION! Harmful situation possible Possible damage to
- the product
- its environment
– Note!
Information! Application details and other
useful information Efficient in operation
2.2 Proper use
The overspeed protector is an electro-hydraulic turbine trip device to control the speed of
steam turbines. If a trip criterion occurs, the magnetic force is switched off in the electronic
component thus switching over the 3/2-way valve via a restoring spring designed with
substantial power reserves. This procedure reliably connects the way valve outlet with the
tank return line and the trip-stop valve will close. The overspeed protector is suitable for
use in Zone 1 and Zone 2 in potentially explosive atmosphere. Allowable ambient
temperature for operation is
-30°C…..+60°C.
The permissible temperature of the hydraulic oil is +10 °C … +60 °C.

The max. surface of the device is significantly determined by the temperature of the
hydraulic oil.
For the operation it is therefore vital to ensure that the max. permissible oil temperature
will not be exceeded!
2.3 Important information
The following information refers to the entire instruction manual and is to be observed in
addition to the individual instructions.
Accident prevention

It is imperative to observe the requirements of the relevant standards and regulations
when connecting an overspeed protector in explosion-proof design.

There must not be any potentially explosive atmosphere during all works performed,
such as e.g. transportation, storage, installation, electrical connection, commissioning,
test run, maintenance and servicing!