Instruction Bulletin Direct Operating Handle

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Instruction Bulletin

30072-450-52

9/2003

Raleigh, NC, USA

Direct Operating Handle

For Use with Class 9421 Type L Circuit Breaker Operating Mechanisms

Class 9421 Type LH79, Catalog Number 9421LH79

Retain for future use.

INTRODUCTION

The direct operating handle attaches to the shaft of the Class 9421 Type L operating mechanism to allow direct operation of the circuit breaker.

DANGER

HAZARD OF ELECTRIC SHOCK,

EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E.

• 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.

INSTALLATION

The direct operating handle is designed to fit approximately within the dimensions of the circuit breaker and of the door handle. During installation, orient the handle to ensure sufficient clearance for the enclosure walls and door. If the shaft uses a support bracket, ensure that sufficient space exists between the bracket and the enclosure door to install the operating handle.

If not, a deeper enclosure is required.

Refer to Figures 1 and 2.

1. With the circuit breaker in the off position, orient the direct operating handle either horizontally or vertically on the shaft with the labels facing outward.

Take care to avoid pinch points between the shaft and the opening in the operating handle.

2. Slide the handle down the shaft to a distance of 1.75 in. (44 mm) from the tip of the shaft.

3. Tighten the set screw and torque to 15 lb-in (1.7 N•m).

NOTE: To ensure that the handle remains in place over the life of the product, be sure to tighten the set screw to the proper torque, and use only the supplied set screw with its thread-locking tip and patch.

Figure 1: Installation

1.75 in.

44 mm

Direct Operating Handle

Figure 2: Orientation (when facing the front of the circuit breaker)

DANGER

Label Label

Horizontal Orientation

Shaft (of the Class 9421 Type L

Operating Mechanism)

OPERATION

After installation, to place the circuit breaker in the on position, turn the direct operating handle clockwise.

NOTE: It may require two hands to operate the handle when it is installed on devices equipped with large circuit breakers.

Set Screw

(15 lb-in)

Direct Operating Handle

Vertical Orientation

(can be rotated 180°)

NOTE: Labels must face outward toward the person operating the equipment.

1

Direct Operating Handle

Instruction Bulletin

30072-450-52

9/2003

Schneider Electric

8001 Highway 64 East

Knightdale, NC 27545

1-888-SquareD (1-888-778-2733) www.SquareD.com

Electrical equipment should 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.

© 2003 Schneider Electric All Rights Reserved

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