Eaton NRX Скачать руководство пользователя страница 27

Страница: 27 / 64

Section 4: Circuit breaker features and accessories

Series NRX with PXR - type RF low voltage power (air) circuit breakers instruction manual

MN013002ENH03 September 2016 www.eaton.com

Interlocked pop-out mechanical trip indicator

An interlocked, red mechanical trip indicator is an optional
feature. It is located in the front of the breaker near the top
and to the right of the trip unit (Figure 5). It operates by
releasing and popping out any time the circuit breaker trips
due to an overcurrent condition.

ote:

The interlocked mechanical trip indicator will prevent
the breaker from being reclosed until the red, pop-
out indicator is reset or pushed back in.

The indicator is reset manually by pushing it back in, or
remotely with the available accessory. If the interlocked
indicator is not reset, the circuit breaker will not close until
the indicator is pushed back in.

An overcurrent trip switch (bell alarm), discussed later in this
section, that operates off the position of the mechanical trip
indicator is also available.

Operations counter

The operations counter is a mechanical device used to indi-
cate a record of the number of circuit operations. It can be
viewed through the breaker’s front cover (Figure 5).

Off key lock

The off key lock secures the circuit breaker in the OFF
position. It can be viewed through the front cover (Figure
6). The customer supplies the key lock. The provisions are
available for Kirk, Castell, Ronis, and CES.

Pushbutton cover

Padlockable covers are available to limit access to the ON
and OFF pushbuttons.

Safe-off pushbutton cover

When padlocked, it maintains the OFF button in the actu-
ated position, which prevents closure of the breaker.

Cassette safety shutters

Automatically operated insulating type safety shutters
(Figure 3) are available for use with the drawout cassette to
cover the fixed primary contacts when the circuit breaker is
not in the CONNECT position. The shutters are activated by
barriers which must be installed on the rear of the drawout
breaker.

Door escutcheon

The door escutcheon is a molded frame used to seal the
space between the circuit breaker and the compartment
door cutout. It is supplied with a mounting gasket. Refer to
IL01301012E for installation information.

IP55 dust and water resistant cover

A hinged dome-shaped waterproof cover attaches to the
metal compartment door to provide protection for the circuit
breaker.

Mechanical interlock

Mechanical interlocks are available to interlock the operation
of two or three Series NRX circuit breakers. The mechanical
interlock holds one or more circuit breakers tripped (pre-
vents closure) when others are closed. Consult Eaton for
details.

Publications

Table 5. Series NRX publications.

Description

Publication
number

Frame

PXR 20/25 Trip Unit for Series NRX User Manual

MN013003EN NF and RF

PXR 20/25 Trip Unit for Series NRX Screen
Navigation Guide

IL0131128EN NF and RF

Series NRX with PXR Circuit Breaker Wiring
Diagrams

TD013001EN

NF and RF