Eaton SVS/12, User Manual

Page: 28 / 138

SVS/12
28 994.530 G01 02
2.4.2 Interlocks, 1250 A panels
Definitions

Panel in the "operating position" means:
the disconnector is in the busbar position and the
circuit-breaker is closed

Panel in the "earthing position" means:
the disconnector is in the earthing position and the
circuit-breaker is closed

Panel in the "intermediate position" means:
the disconnector is in the busbar or earthing position
and the circuit-breaker is open.
Disconnector

The disconnector can only be operated if the circuit-
breaker is open.
Circuit-breaker panel

The circuit-breaker can only be closed if the
disconnector is fully in the busbar position or fully in the
earthing position.

A panel is provided with a padlock to prevent the
circuit-breaker from being opened in the earthing
position

As an option, an interlock can be provided on the
access door of the cable compartment:
This means that the door can only be opened in the
earthing position.
Bus-section panel

On a bus-section panel, the circuit-breaker can be
closed if one of the disconnectors is in the earthing
position. For this reason the main busbar can be
earthed.

The circuit-breaker can be locked with a padlock.
Metering panel

A padlock can be provided on the access door of a
metering panel.
2.4.3 Safety
System-specific safety instructions appear in this manual
as instructions (such as warnings, life hazard etc.) before
or within the relevant operation in the step-by-step
procedures.
The procedures describe what the user may do:

The user must follow the procedures closely and should
only use the accessories supplied.

The user must observe the safety instructions indicated
before the relevant procedures or operations.

No other activities whatsoever are permitted.

When panels are open, the user is responsible for
safety during work on the installation.