EATON IL0131097EN Series NRX with PXR Cassette Cell Switch Instructions

Series NRX with PXR – Instructions for
Cassette Cell Switch – Type NF
Instruction Leaflet IL0131097EN

IL0131097EN Series NRX with PXR Cassette Cell Switch

Instructions apply to:

Series NRX, Type NF Frame
ANSI, UL1066, UL489/IEC IZMX16
WARNING

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 STEPS FOR ALL PROCEDURES DESCRIBED IN THIS INSTRUCTION LEAFLET COULD RESULT IN DEATH, BODILY INJURY, OR PROPERTY DAMAGE.
WARNING
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.

Section 1: General Information

The cassette cell switch is a compartment position switch for drawout circuit breakers. It is comprised of a cassette mounted switch assembly and a breaker mounted actuator. The switch assembly consists of three SPDT switches, which are operated by a common actuator. Figures 1 and 1a illustrate the switch contact positions when the breaker is in a specific position within the cassette. As the breaker is levered in or out from one position to another, the appropriate switch changes state as a result of contact with the breaker mounted actuator.
Kit Parts Identification
Refer to Figure 2 for visual identification of the parts listed below:
(A) Cell Switch Assembly (with mounted labels) (1);
(B) Cell Switch Actuator (1); and
(C) 10 mm self-threading TORX mounting screw (not shown).

COM – Common Wire (BLACK)
NO – Normally Open (RED)
NC – Normally Closed (BLUE)
Contact Open
Contact Closed

Figure 1a. Circuit Breaker Position and Contacts.

Required Tools
TORX Type Screwdriver (#15)
TORX Type Screwdriver (#25)
Small Flat Blade Screwdriver

Section 2: Installation of Cassette Cell Switch

Proceed with the following nine steps:
WARNING
ELECTRICAL SHOCK HAZARD: ALWAYS DE-ENERGIZE PRIMARY AND SECONDARY CIRCUITS PRIOR TO REMOVING THE CIRCUIT BREAKER FROM ITS CASSETTE.
Step 1: Remove the circuit breaker from its cassette prior to starting the installation process.
Step 2: The cell switch assembly (A) is mounted on the inside of the cassette’s left side sheet. Two screws are used to mount the assembly: one 8 mm screw already in the cassette and a 10 mm screw (C) supplied with the cell switch kit. Remove the already mounted 8 mm screw first, using a TORX screwdriver (#25), and use it in the lower mounting hole to thread the lower hole. Once the lower hole is threaded, remove the 8 mm screw and save it for mounting purposes during a later step.

Step 3: Refer to Figure 4 for reference purposes. Mount the cell switch terminal block on the DIN rail to the left of the terminal blocks. This is accomplished by connecting the bottom part of the connection block to the lower part of the DIN rail. The top part of the terminal block can then be snapped onto the upper part of the DIN rail.

Step 4: Once the cell switch terminal block is mounted as described in the previous step, position the cell switch assembly (A) on the inside of the cassette’s left side sheet so the two mounting holes, indicated in Figure 3, match up with the switch assembly mounting holes indicated in Figure 4. In addition, the position tab on the switch assembly shown in Figure 4 should be positioned on top of the leftside cassette rail.
Step 5: Insert the 10 mm TORX head type mounting screw (C) supplied with the kit into the top mounting hole. Next insert the 8 mm TORX head type mounting screw removed in Step 2 into the bottom mounting hole. Torque both screws to 48-60 lbs-in. (5.4-6.7 N·m). Mounting of the cell switch assembly is now complete.

Step 6: The cell switch actuator (B) is now mounted using the TORX head screws that are holding the lifting handle in place on the upper left side of the circuit breaker. Remove the two screws from the handle using a TORX #15 screwdriver.

Step 7: Position the cell switch actuator as shown relative the breaker handle and mount both in place using the TORX screws that were removed in Step 6. Torque both mounting screws to 30-35 lbs-in (3.4-4.0 N·m). Mounting of the cell switch actuator is now complete.

Step 8: Customer cell switch leads should be stripped to a length of 0.197 in. (5 mm). The leads are inserted into wiring access holes on top of the cell switch terminal blocks. While holding the leads securely in place, torque the appropriate screws to 4.4 lbs-in (0.5 N·m) to secure the leads. This completes the installation.

IMPORTANT
Recommended maximum electrical ratings @ 250 Vac:

• ENEC 10 (3), 10 A resistive load, 3 A motor load;
• UL/CSA, 0.25 HP 125/250 Vac, 10.1 A 125/250 Vac.

Step 9: The circuit breaker can now be put back into the cassette.
Lever the breaker into and out of its three positions to ensure that the cell switch assembly is operating smoothly.
Note: Keep in mind that the indicator on the front of the circuit breaker must indicate that the breaker is in the DISCONNECT position to permit insertion of the breaker into its cassette.

Section 3: Removal of Cassette Cell Switch

Remove the circuit breaker from its cassette and repeat Steps 2 through 8 in reverse order.

Eaton
Electrical Sector
1000 Eaton Boulevard
Cleveland, OH 44122
United States
877-ETN-CARE (877-386-2273)
Eaton.com
© 2015 Eaton Corporation
All Rights Reserved
Publication No. IL0131097EN / TBG001208
Part Number: IL0131097ENH01
March 2015
Eaton is a registered Trademark
All other Trademarks are property of their respective owners.

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