Schneider Electric JYT65474 Frame Mission Critical Circuit Breaker Instruction Manual

JYT65474 Frame Mission Critical Circuit Breaker
Instruction Manual

JYT65474 Frame Mission Critical Circuit Breaker

Retain for future use.
Before starting the installation, read and understand all instructions
Applications
The Power PacT J-Frame Mission Critical Circuit Breaker is specifically designed to provide selective coordination with QO™ and E-frame circuit breakers during a short-circuit condition. J-frame mission critical circuit breakers are selective with QO or E-frame circuit breakers per Table 1 when the amperage of the main circuit breaker is at least two times greater than the amperage of the branch circuit breaker.
TABL. 1 : Selectivity with QO and E-Frame Circuit Breakers 1

1 Including AFI, CAFI, EPD and GFI circuit breakers.
One-Line Diagram
208 Y/120 V 3 Phase panel 

Required for Installation

Circuit Breaker

—

|

—

| 3|

—

|

—

I-Line, Micrologic 5/6 Trip Unit| 250 A|

—

|

—

| 3| 1| 1
Lugs One End| 250 A| 3| 2| 3|

—

|

—

Lugs Both Ends| 250 A|

—

| 2| 6|

—

|

—

No Lugs| 250 A| 6| 2|

—

|

—

|

—

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH

•  Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462.
• This equipment must only be installed and serviced by qualified electrical personnel.
• Turn off all power supplying this equipment before working on or inside equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
•  Replace all devices, doors and covers before turning on power to this equipment.

Failure to follow these instructions will result in death or serious injury.
WARNING: This product can exposeyou to chemicals including DINP, which is known to the State of California to cause cancer, and DID Which is known to the State of California to cause birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov.
The product has been designed for4 environment A (Class A, IEC 60947-1).
Use of this product in environment B (Class B, IEC 60947-1) may cause unwanted electromagnetic disturbances in which case the user may be required to take adequate mitigation measures.

Installation

More detailed information can be found on our website: http://www.se.com
For application assistance, please call 1-888-778-2733.
Circuit Breaker Preparation

1. Turn off all power supplying this equipment before working on or inside equipment.

2. Trip the circuit breaker (Figure 1, a–c).
   NOTE: All internal accessories must be installed prior to installing the circuit breaker.

3.  Remove the handle extension (d) if it will interfere with the enclosure door closing.
   NOTE: The handle extension is on all circuit breakers with YE suffix.

4. Remove accessory cover (e).

5. Install the internal accessories (f) as instructed in the instruction bulletins shipped with each accessory.

Visi-Trip™
The Visi-Trip LED handle aids in quickly locating a circuit breaker that requires attention. Inspect the handle position for circuit breaker trip indication. The Visi-Trip handle will flash an LED light as described in Table 2.
NOTE: When performing annual maintenance in accordance with MCCB Field Testing and Maintenance Guide(0600IB1201), operate the push to trip button (if equipped) to verify the VisiTrip functionality. Cycle the circuit breaker from tripped to OFF, and then from OFF to ON and take note of the battery health. See Table 2.
Wait five seconds between handle operation and push-to-trip button operation to ensure that the Vasari handle is on standby mode. Tripping the circuit breaker too soon after toggling may result in the VisiTrip handle not operating as intended.
TABL. 2 :

handle position for circuit breaker trip indication.

1. Refer to the Schneider Electric Frequently Asked Questions page https://www.se.com/us/en/faqs/home/ for more information.
2. If a nuisance LED flashing occurs on ON or OFF position, it can be reset by toggling the circuit breaker. If toggling the circuit breaker is not desired, LED flashing will reset after six hours.

Individually-Mounted Circuit Breaker Installation
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
Install circuit breaker so minimum electrical clearance to grounded metal is maintained.
Failure to follow these instructions will result in death or serious injury.

1. Check minimum electrical clearances (Figure 2, a–c). Enclosure Dimensions****
   |
   ---|---
   Frame| Standard (80%) Rated| 00% Rated
   JD/JG/ JJ/JL 2| 150–250 A| 18.72 x 6.12 x 3.49 in. (476 x 155 x 89mm)| 18.72 x 6.12 x 3.49 in.
   (476 x 155 x 89 mm)
   JR| 28.5 x 12.38 x 5.38 in. (724 x 314 x 137mm)| 62 x 22.5 x 14 in.
   (1575 x 572 x 356 mm)

1 If dimension “A” is less than 0.56 in. (14.2 mm), attach fiber insulating plate (not provided) to enclosure cover.
2 Insulation required if circuit breaker side < 4.13 in. from metal.

2. Install circuit breaker (Figure 3, a–b).

I-Line™ Circuit Breaker Installation
NOTICE
HAZARD OF EQUIPMENT DAMAGE

• Do not adjust jaws.
• Do not remove joint compound.
• If necessary, use Square D joint compound PJC7201.

Failure to follow these instructions can result in equipment damage.

1. Rack the circuit breaker onto the bus (Figure 4, a–b).
2. Tighten the mounting bracket screw (c–d).
3. For circuit breakers with Micrologic 5 or 6 trip units, attach blank extension HLN4EBL (narrow) or HLW4EBL (wide) to the equipment dead front (ef). See installation bulletin 80030-695-02 for  additional information on installing blank extensions.

Cable Installation
NOTE: If needed, install lugs as directed in the instruction shipped with the lug kit.
To convert AL250JD lugs to AL175JD lugs, use the included wire binding screws and the instructions packed with the screws.
NOTICE
HAZARD OF FALSE TORQUE INDICATION
Do not allow conductor strands to interfere with threads of wire binding screws.
Failure to follow these instructions can result in equipment damage.
TABL. 3 : Lug Information

|

|

| | ****
---|---|---|---|---
AL250JD| J-frame| 250 A| (1) Al/Cu| 3/0 AWG–350 kcmil (120–185 mm2)| 1 in. (25 mm)| 225 lb-in.
CU250JD| J-frame| 250 A| (1) Cu| 1/0 AWG–300 kcmil (50–185 mm2)| 1 in. (25 mm)| 250 lb-in.

NOTE: See Table 3 for strip lengths and torques.

1. Preform the conductors to their final  configuration. Strip the conductor ends (Figure 5, a). Do not nick strands.
2.  Install the cables in the lugs and torque the wire binding screws (b).

Bus Installation
NOTE: If terminal nut inserts are not  installed, install terminal nut inserts asdirected in the instructions shipped with  the terminal nut kit.

1. Prepare the bus connections as shown (Figure 6, a).
2. Install the bus connections, using the supplied hardware (b–c).

FIG. 6 :

Lug Shield and Phase Barrier Installation
Install any phase barriers and lug shields as instructed in the bulletins shipped with them.
Control Wiring Installation (All Circuit Breakers)
NOTE: Refer to the bulletin shipped with each accessory for accessory installation instructions.

1. Remove accessory cover (Figure 7, b– c).
2. Install auxiliary devices into corresponding accessory compartments (d).

TABL. 4 :

Auxiliary Devices

OF| Auxilliary contact| Al, A3|
SD| Alarm switch| Al
MN| Undervoltage trip| A2
|
MX| Shunt trip| A2
SDE| Overcurrent trip| A3
7 mm 0 27 in.| 1-2.5mm2 18-14 AWG
SDx| Relay module| Al & A2
SDTAM| Relay module| Al & A2
NSX cord
Cordon NSX
Cordon NSX| Communications cord| A3 alone
Al with BSCM
BSCM| Breaker status communication module| A3
24 Vdc terminal block| Power supply terminal block| A3
MN Spring clamp| Under voltage trip spring clamp| A2
|
MX Spring clamp| Shunt trip spring clamp| A2
7 mm n 27 in| 0.5-1.5 mm2
20-1R AM–;

NOTE: SDx or SDTAM accessories require fuse.
A: 200 mA fuse required, Busman Fuse KTK-2/10 or equivalent
NOTICE

HAZARD OF EQUIPMENT DAMAGE

• Tighten all accessory cover screws to stated torque.
• Do not over torque screws.
• Do not use power equipment to torque screws.

Failure to follow these instructions can result in equipment damage.

1. Route wiring (Figure 7, a).

2. Replace accessory cover (b–c), being careful not to pinch wires when installing cover.
   NOTE: Confirm catalog number on side accessory label (d) and on accessory cover (e) match.

3. Replace Visi-Trip handle (f), note proper orientation (g).

4. Mark on side accessory label (d) which device was installed.

FIG. 7
Individually-Mounted Circuit Breakers I-line Circuit Breakers Trip Unit Adjustment
MicroLogic 2 and 3 Trip Units:
Set the trip unit using the dials on the front of the trip unit (Figure 8, a–d). See Figure 9 for dial information.
See bulletin 48940-310-01, MicroLogic 1, 2, and 3 Electronic Trip Unit—Users Manual, for more information on the trip unit. For example:
To set Ir to 80, rotate dial until arrow points to 80.A. Sensor rating In
B. Long-time protection pickup setting dial Ir
C. Long-time protection time delay setting dial tr
D. Instantaneous protection pickup setting dial Ii
E. Short-time protection pickup setting dial Isd
Protective Functions Trip Curve

A = Adjustable
N = Not Adjustable
— = Not Available

MicroLogic 5 and 6 Trip Units:
Set the protection functions:

• The Pocket Tester or the UTA Tester can be used to power the MicroLogic 5/6 trip unit (Figure 10, a–g). Use enclosed screwdriver to adjust dial settings if necessary (h–i).
• Use the keypad for fine adjustments. See Figure 11 for dial information. See bulletin 48940-312-01, MicroLogic 5 and 6 Electronic Trip Units—Users Manual, for more information on setting and operation of the trip unit.

A. Sensor rating In
B. Long-time protection pickup setting dial Ir
C. Instantaneous protection pickup setting dial Ii
Micro Logic 5.2 A-W, 5.2 E-W

Protective Functions Trip Curve
5.2 A-W, 5.2 E-W, 6.2 A-W, 6.2 E-W A = Adjustable
AR=Adjustable with RSU software
N = Not Adjustable
— = Not Available

No| Function / Función / Fonction| MicroLogic Trip Unit / Unidad de disparo / Déclencheur
---|---|---
5.2| 6.2
1| In| N| N
2| Ir| A| A
3| tr| A| A
4| Isd| A| A
5| tsd| A| A
6| I2t ON/OFF| A| A
7| Ii| A| A
8| Ig| —| A
9| tg| —| A
10| I2t ON/OFF| —| A
Function|

Description

---|---
In| Sensor rating
Ir| Long-time protection pickup
tr| Long-time protection time delay
Isd| Short-time protection pickup
tsd| Short-time protection time delay
I2t ON/OFF| Short-time protection I2t curve in ON or OFF position
Ii| Instantaneous protection pickup
Ig| Ground-fault protection pickup
tg| Ground-fault protection time delay
I2t ON/OFF| Ground-fault protection I2t curve in ON or OFF position

Circuit Breaker Removal

1. Turn off all power supplying this equipment before working on or inside equipment.
2.  Remove circuit breaker in reverse order of installation.

Troubleshooting

If problems occur during installation, refer to the following guide. If problems persist, contact the local field office.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• This equipment must be installed and serviced only by qualified electrical personnel.
• Troubleshooting may require energizing auxiliary devises with a test power supply. Make sure that the power supply is Off (O) before connecting or disconnecting it to the auxiliary device.
• Qualified persons performing diagnostics or troubleshooting that require electrical conductors to be energized must comply with NFPA 70 E – Standard for Electrical Safety Requirements for Employee Workplaces and OSHA Standards – 29 CFR Part 1910 Subpart S – Electrical.

Failure to follow these instructions will result in death or serious injury.

Check system for short circuit or overload.
Circuit beaker trips, but no short circuit or overload is evident.| Voltage is below under voltage trip setting.| Check system for low voltage.
Push-to-trip button does not trip circuit breaker.| Circuit breaker already tripped.| Move circuit breaker handle to reset then to on (I).
Circuit breaker cannot be opened manually.| Damage to current path.| Contact local field office.

Electrical equipment must be installed, operated, serviced, and maintained only by qualified  personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.
Schneider Electric and Square D are trademarks and the property of Schneider Electric SE, its subsidiaries, and affiliated companies. All other trademarks are the property of their respective owners.

Schneider Electric Limited
Stafford Park 5 Telford TF3 3BL
United Kingdom www.se.com/uk
Schneider Electric USA, Inc.
800 Federal Street
Andover, MA 01810 USA 888-778-2733
www.se.com/us
Schneider Electric Canada, Inc.
5985 McLaughlin Road
Mississauga, ON L5R 1B8 Canada
800-565-6699
www.se.com/ca
© 2012-2023 Schneider Electric All Rights Reserved

References

• P65Warnings.ca.gov
• p65warnings.ca.gov/
• Schneider Electric Canada | Global Specialist in Energy Management and Automation
• Schneider Electric Mexico | Servicios de Renovación y Retrofit de Schneider Electric
• Schneider Electric USA | Global Specialist in Energy Management and Automation
• Frequently Asked Questions - Schneider Electric

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>