Eaton N-frame auxiliary switch Owner's Manual
Eaton N-frame auxiliary switch is used for remote signaling and system interlocking purposes. The auxiliary switch features:
- One, two, or three single pole, double-throw (SPDT) switches assembled to a plug-in module.
- Each SPDT switch has one "a" and one "b" contact.
- When the crossbar is in the contacts-closed position, the "a" contact of each SPDT switch is closed and the "b" contact is open.
- When the crossbar is in the tripped or contacts-open position, the "a" contact is open and the "b" contact is closed.
- Maximum voltage:
- 600 V AC
- 250 V DC
- Maximum current:
- 6 A AC
- 0.5 A DC (non-inductive load)
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Instruction Leaflet
IL29C124D
Effective December 2011
Supersedes IL29C124C 09/97
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
Contents
Description Page
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Instruction Leaflet IL29C124D
Effective December 2011
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
!
WARNING
CONTACT WITH ENERGIZED EQUIPMENT CAN
RESULT IN DEATH, SEVERE PERSONAL INJURY,
OR SUBSTANTIAL PROPERTY DAMAGE. DO NOT
ATTEMPT TO INSTALL OR PERFORM MAINTE-
NANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFE-
TY PROCEDURES.
EATON IS NOT LIABLE FOR THE MISAPPLICATION
OR MISINSTALLATION OF ITS PRODUCTS.
The user is cautioned to observe all recommendations, warnings, and cautions relating to the safety of personnel and equipment as well as all general and local health and safety laws, codes, and procedures.
Figure 1-1 Auxiliary Switch Installed in N-Frame Circuit
Breaker.
The recommendations and information contained herein are based on Eaton experience and judgement, but should not be considered to be all-inclusive or covering every application or circumstance which may arise. If any questions arise, contact Eaton for further inform- ation or instructions.
1. INTRODUCTION
General Information
The auxiliary switch (Fig.1 -1) indicates circuit breaker contacts status, and is used for remote signaling and system interlocking purposes. The switch consists of one, two, or three single pole, double-throw (SPDT) switches assembled to a plug-in module. The plug-in module is mounted in slots in the top of the trip unit; it occupies the accessory cavity in the circuit breaker frame, and is positioned so that the switch actuator is operated by the crossbar. Each SPDT switch has one
"a" and one "b" contact. When the crossbar is in the contacts-closed position, the "a" contact of each SPDT switch is closed and the "b" contact is open. When the crossbar is in the tripped or contacts-open position, the
"a" contact is open and the "b" contact is closed.
Table 1-1 lists electrical rating data for the auxiliary switch.
For this publication, the term circuit breaker shall also include molded case switch and motor circuit protector.
Table 1-1. Auxiliary Switch Electrical Rating Data ①➁➂
Maximum
Voltage (V)
Freq.
Maximum Dielectric
Current Withstand
(A) Voltage (V)
600
125
250
50/60 Hz
DC
DC
6
0.5
➃
0.25
➃
2500
① Endurance - 400 electrical operations plus 5600 mechanical operations
➁ Pigtail wire size - No. 18 AWG (0.82 mm(~))
➂ Terminal block is listed for use with one or two No. 18 to
No. 14 AWG solid or stranded copper wires. Torque is 7
Ib-in (0.8 N.m)
➃ Non-inductive load
2 EATON CORPORATION www.eaton.com
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
Depending on the model ordered, connections for the auxiliary switch are in one of four forms. The standard wiring configuration is pigtail leads exiting the rear of the base directly behind the auxiliary switch. Optional configurations include a terminal block mounted on the same side of the base as the accessory, leads exiting the side of the base where the accessory is mounted, and leads exiting the rear of the base on the side opposite the accessory. The 18-inch long pigtail leads are color coded for identification; identification labels are provided for pigtail leads and terminal block points. For allowable locations of all accessories, refer to Selection
Data 29-120N. See Fig. 2-2.
This instruction leaflet (I.L.) gives detailed procedures for installing the auxiliary switch.
2. INSTALLATION
NOTICE
The auxiliary switch can be field-installed in ND,
HND, and NDC circuit breakers under UL File
E64983.
The auxiliary switch can be field-installed in NW,
HNW, and NWC circuit breakers.
Instruction Leaflet IL29C124D
Effective December 2011
The auxiliary switch is listed for factory installation under UL File E7819.
For sealed circuit breakers (NDB), Underwriters Lab oratories Inc. UL 489 requires that internal accessories be installed at the factory. The auxiliary switch is listed for factory installation under UL File
E7819.
Where local codes and standards permit and UL listing is not required, internal accessories can be field installed in sealed circuit breakers. In this case, UL listing becomes invalid and the label should be removed .
Before attempting to install the auxiliary switch check that the catalog number is correct as ordered and that the rating of the accessory satisfies the job requirements.
The auxiliary switch, shown in kit form in Fig. 2-1, is installed in the right or left accessory mounting cavity of a 2-, 3-, or 4 pole circuit breaker. An auxiliary switch must be installed in the circuit breaker before the circuit breaker is mounted in an electrical system. To install the auxiliary switch, perform the following procedures:
Auxiliary Switch
Plug-in Module with
Pigtail Leads
Wire
Marking Labels
(Supplied With Double
Auxiliary Switch Only).
Figure 2-1 Auxiliary Switch Kit.
Accessory
Identification
Label
Connection
Diagram
Label
Pigtail
Lead Label
Shown
NOTICE
A circuit breaker that is mounted in an electrical system must be removed to install the accessory.
To ensure correct accessory installation, the circuit breaker must be placed on a horizontal surface.
!
WARNING
THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
BEFORE REMOVING A CIRCUIT BREAKER
INSTALLED IN AN ELECTRICAL SYSTEM, MAKE
SURE THE CIRCUIT BREAKER IS SWITCHED TO
THE OFF POSITION AND THERE IS NO VOLTAGE
PRESENT WHERE WORK IS TO BE PERFORMED.
SPECIAL ATTENTION SHOULD BE PAID TO
REVERSE FEED APPLICATIONS TO ENSURE NO
VOLTAGE IS PRESENT.
NOTICE
For new circuit breaker installation, the trip unit must be installed in circuit breaker before attempting to install an auxiliary switch.
EATON CORPORATION www.eaton.com
3
Instruction Leaflet IL29C124D
Effective December 2011
Rear Exiting Leads
(Preferred)
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
Auxiliary
Switch Above
Right-Hand
Accessory
Cavity
Recessed
Hole Under
Dust Cover
Auxiliary Switch
Installed In
Left-Hand
Accessory
Cavity
Terminal Back
4
Figure 2-3 Auxiliary Switch Installation Positions.
Side Exiting Leads
Opposite-Side
Exiting Leads
Figure 2-2 Accessory Wiring Options.
2-1. Switch circuit breaker to OFF position.
NOTICE
Molded case switch trip units are not equipped with a PUSH-TO-TRIP button. For molded case switches, omit step 2-3.
2-2. Disconnect and remove circuit breaker from installation and terminal connections.
2-3. Switch circuit breaker to ON position then press
PUSH TO-TRIP button to trip operating mechanism and check handle moves to trip position with white colored indicator visible in escutcheon window.
2-4. Remove circuit breaker cover screws and covers.
2-5. For high instantaneous trip-types (catalog suffix K designations) molded case switches, find recessed hole in left pole of the trip unit normally intended for intermediate plunger, remove dust cover (Fig. 2-3) and push a fine point implement in hole to trip the molded case switch.
NOTICE
For a single auxiliary switch having rear or opposite-side exiting pigtail leads, thread leads through center trough in side of base before attempting to insert the mounting bracket. For double or triple accessories, leads from the outer auxiliary switch must go to the center trough. Pigtail leads exiting in this manner should be eased through trough as mounting bracket is inserted into trip unit retaining slots. Use center trough also for leads exiting the side of the circuit breaker.
2-6. Route wiring to meet installation requirements (see
Fig. 2-2).
!
CAUTION
LEADS SHOULD BE FORMED AND ROUTED TO
CLEAR ALL MOVING PARTS WHEN ACCESSORY IS
PROPERLY INSTALLED. LEADS COULD BE DAM-
AGED IF IN CONTACT WITH MOVING PARTS.
2-7. Insert auxiliary switch as described in the following steps (Fig. 2-3).
EATON CORPORATION www.eaton.com
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
Instruction Leaflet IL29C124D
Effective December 2011
Modification
Label
Accessory
Identification
Label
Red Red a
Black b
Blue
Pigtail Leads
Black
Blue
Terminal Block a b c
Figure 2-5 Auxiliary Switch Connection Diagram.
Pigtail Connection
Diagram
(When Used)
Terminal Block
Connection Diagram
Label (When Used)
Figure 2-4 Preferred Mounting Locations for Accessory
Nameplate Labels.
a. Slide auxiliary switch plug-in module into slots until retaining spring clip snaps into trip unit. Auxiliary switch actuator must be in front of the crossbar. For terminal block assemblies, slide terminal block into mounting slot on side of base as plug-in module is being positioned. b. If required, complete routing of leads to opposite side through rear wiring trough. c. For double or triple auxiliary switch pigtail leads, attach wire marking labels to bundle of three leads for each switch. (Markers designated 1, 2, and 3 are provided if required.)
!
CAUTION
WHEN INSTALLING CIRCUIT BREAKER MAIN
COVER, MAKE SURE THAT ALL INTERNAL PARTS
ARE IN PLACE:
•
All leads are clear of the cover.
2-8. With circuit breaker handle in TRIPPED position and accessory pigtail leads (if used) routed as required, install circuit breaker covers. Secure with pan-head screws. Torque to 22-24 Ib-in (2.49- 2.72 N.m).
2-9. Place accessory labels (supplied with kit) on circuit breaker (see Fig. 2-4).
NOTICE
Accessory labels show connection diagram for auxiliary switch. Pigtail leads are color coded red, black, and blue.
2-10. Test auxiliary switch(es). Connect continuity tester or ohmmeter across pigtail leads or terminal block connections. Check continuity as follows: a. Circuit breaker handle OFF
"a" contact(s) - open
"b" contact(s) - closed.
b. Circuit breaker handle ON
"a" contact(s)- closed
"b" contact(s) - open
NOTICE
For molded case switches omit step c.
c. Press PUSH-TO-TRIP button
"a" contact(s) - open
"b" contact(s) - closed.
If auxiliary switch(es) fails test, make sure that auxiliary switch(es) module is properly seated in trip unit slots. If auxiliary switch(es) appears to be correctly installed and the problem persists, contact Eaton.
2-11. Install circuit breaker.
2-12. Connect auxiliary switch(es) as required (see Fig.
2-5).
Eaton assumes no responsibility for malfunctioning accessories installed improperly by the customer.
EATON CORPORATION www.eaton.com
5
Instruction Leaflet IL29C124D
Effective December 2011
Notes:
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
6 EATON CORPORATION www.eaton.com
Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
Notes:
Instruction Leaflet IL29C124D
Effective December 2011
EATON CORPORATION www.eaton.com
7
Instruction Leaflet
Effective December 2011
IL29C124D Installation Instructions for Auxiliary Switch for NDB, ND,
HND, NDC, NW, HNW, NWC Circuit Breakers, Series C Molded
Case Switches, and Motor Circuit Protectors (HMCP)
The instructions for installation, testing, maintenance, or repair herein are provided for the use of the product in general commercial applications and may not be appropriate for use in nuclear applications. Additional instructions may be available upon specific request to replace, amend, or supplement these instructions to qualify them for use with the product in safety-related applications in a nuclear facility.
This Instruction Booklet is published solely for information purposes and should not be considered all-inclusive. If further information is required, you should consult an authorized Eaton sales representative.
The sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between the parties. This literature is not intended to and does not enlarge or add to any such contract.
The sole source governing the rights and remedies of any purchaser of this equipment is the contract between the purchaser and Eaton.
NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR
MERCHANTABILITY, OR WARRANTIES ARISING FROM COURSE
OF DEALING OR USAGE OF TRADE, ARE MADE REGARDING
THE INFORMATION, RECOMMENDATIONS, AND DESCRIPTIONS
CONTAINED HEREIN.
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever, including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations and description contained herein.
Eaton Corporation
Electrical Sector
1111 Superior Ave.
Cleveland, OH 44114
United States
877-ETN-CARE (877-386-2273)
Eaton.com
© 2011 Eaton Corporation
All Rights Reserved
Printed in USA
Publication No. IL29C124D / TBG000807
Part No. 6634C81H04
December 2011
Eaton is a registered trademark of Eaton
Corporation.
All other trademarks are property of their respective owners.

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