2
Instruction Leaet IL0131075EN
Effective August 2015
Installation and removal instructions
Series NRX RF xed breaker
three-wayType 32 cable interlock kit
EATON www.eaton.com
mWARNING
(1) ONLY QUALIFIED ELECTRICAL PERSONNEL SHOULD BE PERMITTED TO
WORK ON THE EQUIPMENT.
(2) ALWAYS DE-ENERGIZE PRIMARY AND SECONDARY CIRCUITS IF A
CIRCUIT BREAKER CANNOT BE REMOVED TO A SAFE WORK LOCATION.
(3) DRAWOUT CIRCUIT BREAKERS SHOULD BE LEVERED (RACKED) OUT TO
THE DISCONNECT POSITION.
(4) ALL CIRCUIT BREAKERS SHOULD BE SWITCHED TO THE OFF POSITION
AND MECHANISM SPRINGS DISCHARGED.
FAILURE TO FOLLOW THESE WARNINGS FOR ALL PROCEDURES
DESCRIBED IN THIS INSTRUCTION LEAFLET COULD RESULT IN DEATH,
BODILY INJURY, OR PROPERTY DAMAGE.
mWARNING
THE INSTRUCTIONS CONTAINED IN THIS IL AND ON PRODUCT LABELS
HAVE TO BE FOLLOWED. OBSERVE THE FIVE SAFETY RULES:
– DISCONNECTING
– ENSURE THAT DEVICES CANNOT BE ACCIDENTALLY RESTARTED
– VERIFY ISOLATION FROM THE SUPPLY
– EARTHING AND SHORT-CIRCUITING
– COVERING OR PROVIDING BARRIERS TO ADJACENT LIVE PARTS
DISCONNECT THE EQUIPMENT FROM THE SUPPLY. USE ONLY AUTHORIZED
SPARE PARTS IN THE REPAIR OF THE EQUIPMENT. THE SPECIFIED
MAINTENANCE INTERVALS AS WELL AS THE INSTRUCTIONS FOR REPAIR
AND EXCHANGE MUST BE STRICTLY ADHERED TO PREVENT INJURY TO
PERSONNEL AND DAMAGE TO THE SWITCHBOARD.
mWARNING
MECHANICAL INTERLOCKS FOR SYSTEMS WITH ONE OR TWO SUPPLIES
SWITCHED ON AT ALL TIMES. IN THE EVENT THAT BOTH SUPPLY
SWITCHING DEVICES ARE IN THE OPEN POSITION, THERE IS A POSSIBILITY
THAT A CLOSE SIGNAL TO ALL THREE SWITCHING DEVICES COULD CAUSE
MOMENTARY PARALLELING. IF THIS IS UNDESIRABLE, THE USER MAY
WANT TO INCLUDE A SEPARATE MECHANICAL AND/OR ELECTRICAL
INTERLOCK TO PREVENT SIMULTANEOUS CLOSING COMMANDS BEING
SENT TO BOTH OF THE NORMAL SUPPLY SWITCHING DEVICES (A AND C)
AND THE TIE SWITCHING DEVICE (B) UNDER ALL CONDITIONS.
General information
This information leaflet provides detailed installation instructions for
installing and interconnecting one fixed Type RF frame breaker to
another type of low voltage circuit breaker (LVCB) in any position
(see A, B, C in Table 1) for a Type 32 interlock configuration as
shown in Figure 1. When purchasing kits for a Type 32 interlock
configuration setup, additional interlock kits (the types of interlock
kits and the other breakers on which they can be installed that are
compatible with this kit are listed in Table 2) are required for the
other two breakers as well as the interconnecting cable kits
(three are required).
For Type 32 interlock configurations, the mechanical interlock holds
one of the breakers tripped or open (prevents closure) when the
other two are closed. A lever assembly is mounted on each breaker
and interfaces with the pole shaft and trip bar. The lever assemblies
are interconnected with cables provided in interconnecting cable
kits (listed in Table 3) that are compatible with this interlock kit. The
cable kits, purchased separately, each contain two cables and can be
used for any orientation of the breakers according to the installation
recommendations in Step 9.
Refer to Figure 2 and Figure 3 for identification of interlock kit and
interconnecting cable kit contents, respectively.
Breaker A
Breaker B
Breaker C
Type 32 cable routing
Figure 1. Cable routing for three-way Type 32
interlock configurations
Table 1. Type 32 interlock logic
Type 32 (six cable)
Breaker
A B C
A B C
Allowed states or conditions
000
100
010
001
110
011
101
0 = open
1 = closed
