Eaton Xiria, Руководство пользователя

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Xiria
994.570 G01 06 27
4.3 Interlocks
The Xiria unit is equipped as standard with built-in
interlocks to prevent accidental switching operations.
These interlocks are mechanical interlocks.
L
IFE HAZARD
Undesirable switching operations could result in
the following:
•
danger to personnel (operating and service
personnel);
•
failure of power supply;
•
damage to the unit.
W
ARNING
If a (switching) action cannot be achieved with
normal operating force:
•
Check against section 4 whether
the action to be carried out is permissible;
•
Notify Eaton-ESS if the action is permissible
according to the switching tables but cannot be
accomplished with normal operating force.
4.3.1 Built-in interlocks
The following interlocks have been applied:

Interlock to prevent cable access from being opened if
cable is not earthed. Note: Once the cable access has
been opened, the panel can be switched off to carry out
cable tests; this interrupts the cable-earth link.

Interlock to prevent operation of the change-over switch
when the circuit-breaker or load-break switch is active.

In order prevent reflex attempts to switch off a short-
circuit after switching on, the opening button is equipped
with an anti-reflex flap (1).
A number of switching positions can also be interlocked
with padlocks.
W
ARNING
After any temporary absence, check that the
necessary interlocks and eventually mounted
back-up earths are still in place.
4.3.2 Earthed position interlock
The earthed position interlock is intended to prevent the
cable earthing from being interrupted unintentionally. Cable
earthing is achieved via the load-break/circuit breaker
switch; it therefore requires to be locked against opening to
be sure that the cable is earthed.
Once this interlock has been installed, the following
operations are no longer possible:

Turning off the switch with the opening button.

Electrical disconnection of the switch by the protective
relay.

Opening the door of the cable compartment.
The earthed position interlock can be installed if (see
section 4.2.2):

the change-over switch is in the earthed position;

the switch is ON;

the cable access door is closed;

the flap in front of the opening button is fully placed in
front of this button.
The interlock is used as follows, see Figure 4-13
1. Turn the selector (7) anti clockwise.
2. Place the cover flap fully in front of the opening
button (A)
3. Pull part B to the front, part C will automatically move
downward and part B stays in position (Figure 4-13 C).
4. Put the hasp of the padlock (D) through the hole on
the right (Figure 4-13 D).
The hasp diameter can be 1-12 mm.
5. The earth position is now interlocked, including the
cable access door and the opening button.
6.
Put up a “cable earthed” warning sign if needed.
Remove the interlock as follows:
1. Remove the padlock D (Figure 4-13 D).
2. Push part C upwards, part B will automatically move
backwards (Figure 4-13 C).
3. The earth position interlock is removed.
Figure 4-13
A
C
D
C C
B
B
A
7