Stahl 8527/2, Operating Instructions Manual

Page: 38 / 52

Maintenance
12 8527602300
S-BA-8527/2-01-en-10/10/2007
Circuit breakers for motor protection
8527/2
9.1 Setting the Thermal Overcurrent Trip
10 Maintenance
10.1 Regular Maintenance Work
X
Consult the relevant regulations (e.g. IEC/EN 60079-17) to determine the type and
extent of inspections.
X
Plan the intervals so that any defects in the equipment which may be anticipated are
promptly detected.
To check as part of the servicing/maintenance schedule:
X
Check that cables and lines are clamped properly.
X
Inspect device for visible damage.
X
Compliance with the permitted temperatures in accordance with EN 60079-0.
X
Make sure the device is used according to its designated use
X
Make sure the operating handle can be reset.
11478E00
The required current can be adjusted using a suitable
screwdriver.
The open end of the slot indicates the selected current (see
drawing for an example: rated current 6.3 A).
)
If ambient temperatures differ from standard values, or if the ambient
temperatures of motor and circuit breaker are different, the trip response must
be checked and the current changed if necessary.
WARNING
Risk due to unauthorised work being performed on the device!
Z
Risk of injury and damage to equipment.
X
Mounting, installation, commissioning and servicing work must only be performed by
personnel who are both authorised and suitably trained for this purpose.
WARNING
Danger from energised parts!
Z
Risk of severe injuries.
X
All connections and wiring must be disconnected from the power supply.
X
Secure the connections against unauthorised activation.
WARNING
Short circuit in the circuit
Z
After multiple short circuits, the flameproof encapsulation is no longer
guaranteed.
X
After a short circuit, check the functionality of the device.
X
Replace the entire device if needed.