Cutler-Hammer E2 L User manual

I.L. 29C171
Effective March 1998.
Cutler-Hammer
Installation Instructions for Undervoltage Release
Mechanism (Handle Reset) with LED for E2L and E2LM
Mining Circuit Breakers
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.
CUTLER-HAMMER IS NOT LIABLE FOR THE MISAP-
PLICATION OR MISINSTALLATION OF ITS PROD-
UCTS.
The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person-
nel and equipment as well as all general and local
health and safety laws, codes, and procedures.
!
WARNING The recommendations and information contained herein
are based on Cutler-Hammer experience and judge-
ment, but should not be considered to be all-inclusive or
covering every application or circumstance which may
arise. If any questions arise, contact Cutler-Hammer for
further information or instruction.
1.0 INTRODUCTION
General Information
The undervoltage release mechanism (UVR) (Figure 1-
1) monitors a voltage (typically a line voltage and trips
the circuit breaker when the voltage falls to between 70
and 35 percent of the solenoid coil rating. The UVR
consists of a continuous rated solenoid with a plunger
and reset lever assembled to a plug-in module. The
plug-in module is mounted in slots in the top of the trip
unit and occupies the accessory cavity in the circuit
breaker frame. The reset lever resets the UVR when
normal voltage is restored and the circuit breaker handle
is moved to the resets (extreme OFF) position. With no
voltage applied to the UVR, the circuit breaker contacts
will not touch when a closing operation is attempted.
The UVR is available for 120 VAC. Table 1.1 lists appli-
cations and electrical ratings data for the UVR.
For this publication, the term circuit breaker shall also
include molded case switch and motor circuit protector.
Depending on the model ordered, connections for the
UVR are in one of four forms. The standard wiring con-
figuration is pigtail leads exiting the rear of the base
directly behind the UVR. 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 identi-
fication; identification labels are provided for pigtail
leads and terminal block points.
This instruction leaflet (IL) gives detailed procedures for
installing the UVR.
Figure 1-1 Undervoltage Release Mechanism (Handle
Reset) with LED installed in L-Frame Mining Circuit Breaker

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2.0 INSTALLATION
The UVR can be field-installed in E2L and E2LM min-
ing circuit breakers.
Before attempting to install the UVR, check that the
catalog number is correct as ordered.
The UVR, shown in kit form in Figure 2-1, is installed in
the left accessory mounting cavity of a 3-pole circuit
breaker. A UVR must be installed in the circuit breaker
before the circuit breaker is mounted in an electrical
system. To install the UVR, perform the following pro-
cedures:
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.
THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
SPECIAL ATTENTION SHOULD BE PAID TO
REVERSE FEED APPLICATIONS TO ENSURE NO
VOLTAGE IS PRESENT. BEFORE REMOVING A
CIRCUIT BREAKER INSTALLED INA N 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.
For new circuit breaker installation, the trip unit
must be installed in circuit breaker before attempt-
ing to install a UVR. Refer to I.L. 29C607, I.L.
29C608, I.L. 29C609 or I.L. 29C610 for instructions
on how to install trip unit.
2-1. Switch circuit breaker to OFF position.
Figure 2-1 Undervoltage Release Mechanism (Handle
Reset) Kit Figure 2-2 Trip Unit Barrier Removal
NOTICE
NOTICE
!
WARNING
NOTICE
Accessory
Identification
Label
MINING
UVR CAT UVM4PO8K STYLE 1483D42G01
FREQ
VOLTS
VA
50/60 Hz
120
2.4
Connection Diagram
Label (Pigtail
Leads Shown)
UV-1 UV-2
UV
Replacement
Interphase
Barrier
Intermediate
Plunger
UVR Plug-in
Module (With
Pigtail Leads)
Intermediate
Plunger
Recessed
Hole
Trip
Unit
Trip
Unit
Barrier

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Effective 3/98
To install UVR, circuit breaker operating mechanism
must be in tripped position.
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 instal-
lation and terminal connections.
2-3. Press PUSH-TO-TRIP button to trip operating
mechanism, and check handle moves to trip posi-
tion with white colored indicator visible in
escutcheon window.
2-4. Remove circuit breaker cover screws and covers.
2-5. For high instantaneous trip-type (catalog suffix K
designation) molded case switches, find recessed
hole in either of the trip unit outer poles (Figure 2-
2). Push intermediate plunger supplied with UVR
in one hole to trip the molded case switch.
Remove plunger to prevent it falling out of
recessed hole in trip unit and into molded case
switch mechanism.
2-6. Remove interphase barrier between accessory
mounting cavity and operating mechanism (see
Figure 2-3).
2-7. Install replacement interphase barrier (supplied
with kit) in base (see Figure 2-3).
2-8. Install UVR as described in following steps (see
Figure 2-4).
IF UVR IS REMOVED FROM CIRCUIT BREAKER,
INTERMEDIATE PLUNGER MUST ALSO BE
REMOVED. FAILURE TO REMOVE THE INTERMEDI-
ATE PLUNGER CAN RESULT IN EQUIPMENT DAM-
AGE.
a. Remove barrier from trip unit accessory mounting
slots in pole bing used for accessory (Figure 2-2).
b. Position intermediate plunger in trip unit (Figure 2-
2).
c. Press intermediate plunger into recess in trip unit
and hold in position.
NOTICE
Figure 2-3 Interphase Barrier Replacement
Figure 2-4 UVR Installation
!
WARNING
Remove
Interphase
Barrier
Replacement Barrier
Supplied with UVR
Switch Kit
UVR Plug-in
Module
UVR Reset Lever in
Slot in Interphase
Barrier in Front of
Handle Arm
Interphase
Barrier

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d. Push circuit breaker handle towards the ON position
and hold while sliding UVR plug-in module into slots
in trip unit (Figure 2-4) until retaining clip snaps into
trip unit. For terminal block assemblies, slide termi-
nal block into mounting slot on side of base as plug-
in module is being positioned.
For a UVR having rear or opposite-side exiting pig-
tail leads, thread leads through in side of base
before attempting to insert the mounting bracket.
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.
LEADS SHOULD BE FORMED AND ROUTED TO
CLEAR ALL MOVING PARTS WHEN ACCESSORY IS
PROPERLY INSTALLED. PIGTAIL WIRES COULD
BE DAMAGED IF IN CONTACT WITH MOVING
PARTS.
2-9. Route wiring to meet installation requirements
(Figure 2-5). If required, complete routing of leads
of opposite side through rear wiring trough.
FAILURE TO KEEP FINGERS AWAY FROM MOVING
PARTS CAN CAUSE PERSONAL INJURY. WHEN
CHECKING ACCESSORY, DO NOT PUT FINGERS
NEAR MOVING PARTS INSIDE CIRCUIT BREAKER
CASE. SPRINGS CAUSE INTERNAL PARTS TO
MOVE QUICKLY AND WITH FORCE.
2-10. Perform mechanical check of UVR after installa-
tion:
a. WIth the circuit breaker still electrically isolated,
reset the circuit breaker.
b. Mechanical check. Using a small flat-blade screw-
driver, (Figure 2-6), push in and hold solenoid
plunger. Switch circuit breaker to ON. Release
solenoid plunger and check that circuit breaker trips.
c. Reset circuit breaker handle and check that handle
arm moves reset lever to reset the solenoid plunger.
d. If mechanical check does not trip circuit breaker,
see if UVR and intermediate plunger are correctly
installed. If UVR and intermediate plunger are cor-
NOTICE
Figure 2-5 Accessory WIring Options
Figure 2-6 Screwdriver Depressing Undervoltage
Release Mechanism Solenoid Plunger
Rear Exiting Leads
(Preferred) Terminal Block
Side Exiting Leads Opposite-Side
Exiting Leads
Solenoid
Plunger
Flatblade
Screwdriver
!
WARNING

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Effective 3/98
rectly installed. If UVR and intermediate plunger appear
to be properly installed and problem persists, contact
Cutler-Hammer.
WHEN INSTALLING CIRCUIT BREAKER MAIN
COVER, MAKE SURE THAT ALL INTERNAL PARTS
ARE IN PLACE:
·SLIDING HANDLE BARRIER IS POSITIONED SO
THAT THE HANDLE OPENING IS ALIGNED WITH
THE HANDLE.
·ALL LEADS ARE CLEAR OF THE COVER.
2--11.With circuit breaker handle in the TRIPPED posi-
tion and accessory pigtail leads (if used) routed as
required, install circuit breaker covers. Secure
with pan-head screws. Torque to 20-22 lb-in.
(2.26-2.49 N.m.)
2-12. Remove and discard UL listing label on LDB cir-
cuit breakers only.
2-13. Place accessory labels (supplied with kit) on cir-
cuit breaker (see Figure 2-7).
2-14. Where practical and after taking all necessary
safety precautions, apply rated voltage to UVR.
Reset and close circuit breaker. Confirm that cir-
cuit breaker trips when voltage is removed.
2-15. Install circuit breaker.
Accessory labels show connection diagram for UVR
contacts. Pigtail leads are color coded orange and
brown.
2-16. Connect UVR as required (see Figure 2-8).
Cutler-Hammer assumes no responsibility for malfunc-
tioning accessories installed improperly by the cus-
tomer.
!
CAUTION
NOTICE
Figure 2-7 Preferred Mounting Locations for Accessory
Nameplate Labels
Figure 2-8 Undervoltage Release Mechanism (Handle
Reset) Connection Diagram
Terminal Block
Connection Diagram
Label (When Used) Modification
Label
Accessory
Identification
Label Pigtail
Connection
Diagram
(When Used)
Overcurrent Protection
(Supplied by Customer
When Required)
Overcurrent Protection
(Supplied by Customer
When Required)
Monitored
Voltage Monitored
Voltage
Orange
Brown
UV1
UV2
UVR
UVR
Pigtail Leads Terminal Block

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Application Electrical Operating Ratings Approximate Operating Time (ms)
Ratings
Voltage Supply Dropout Pickup VA Min.➁Initiation➂Maximum Dielectric➃
(V) Voltage Voltage (V) Voltage (V) UVR Circuit Circuit Withstand
(V) Min. Min. Max. Response Breaker Breaker Voltage (V)
Contact Contact
Separation Opening
120 120 44.5 77 93.5 2.1 5 15 25 1500
Table 1.1 AC (50/60 Hz) Undervoltage Release Mechanism (Handle Reset) Ratings ➀
➀Endurance – 400 electrical operations plus 5600 mechanical operations
➁UVR will override a momentary voltage dip up to the response time shown
➂Unlatching occurs 1 millisecond before circuit breaker contacts begin to separate
➃For 1 minute

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Cutler-Hammer
Five Parkway Center
Pittsburgh, PA 15220
Effective 3/98 (ISI)
Style 6603C60H01
Printed in U.S.A.
Page 8 I.L. 29C171