Powell AP.CBM.01 EIM, Manual

3

Safety

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01.4IB.48070A

Ch 2  Safety

A.  S

Afe

 W

ork

 c

ondItIon

The information in Section A is quoted from  

NFPA 70E 2012 - Article 120, 120.1 Establishing an 

Electrically Safe Work Condition.

120.1 Process of Achieving an Electrically Safe 

Work Condition

1.  Determine all possible sources of electrical 

supply to the specific equipment.  Check 

applicable up-to-date drawings, diagrams, 

and identification tags.

2.  After properly interrupting the load current, 

OPEN the disconnecting device(s) for each 

source.

3.  Wherever possible, visually verify that all 

blades of the disconnecting devices are 

fully OPEN or that drawout type circuit 

breakers are withdrawn to the fully 

disconnected position.

4.  Apply lockout/tagout devices in accordance 

with a documented and established policy.

5.  Use an adequately rated voltage detector 

to test each phase conductor or circuit part 

to verify they are deenergized.  Test each 

phase conductor or circuit part both  

phase-to-phase, and phase-to-ground.  

Before and after each test, determine 

that the voltage detector is operating 

satisfactorily.

Informational Note:

  See ANSI/ISA-

61010-1 (82.02.01)/UL 61010-1, Safety 

Requirements for Electrical Equipment for 

Measurement, Control, and Laboratory 

Use - Part 1:  General Requirements, 

for rating and design requirements for 

voltage measurement and test instruments 

intended for use on electrical systems  

1000V and below.

6.  Where the possibility of induced voltages 

or stored electrical energy exists, ground 

the phase conductors or circuit parts 

before touching them.  Where it could be 

reasonably anticipated that the conductors 

or circuit parts being deenergized 

could contact other exposed energized 

conductors or circuit parts, apply ground 

connecting devices rated for the available 

fault duty.

B.  S

Afety

 G

uIdelIneS

Study this instruction bulletin and all other 

associated documentation before uncrating 

the controllers.

Each user has the responsibility to instruct 

and supervise all personnel associated with 

usage, installation, operation, and maintenance 

of this equipment on all safety procedures.  

Furthermore, each user has the responsibility of 

establishing a safety program for each type of 

equipment encountered.

The

medium voltage equipment described in 

this instruction bulletin is operated by a  

high-energy, high-speed mechanism that 

is interlocked to provide specific operating 

sequences.  It is mandatory that the following 

rules be observed to ensure the safety of 

personnel associated with usage, installation, 

operation, and maintenance of these 

controllers. 

The safety rules in this instruction bulletin are 

not intended to be a complete safety program.  

The rules are intended to cover only some of the 

important aspects of personnel safety related to  

Circuit Breaker Monitor (CBM).