Powell 51897G31-1600, User Manual

Powered by Safety

®

3

Safety

01.4IB.51809

Ch 2  Safety

A.  S

Afe

 W

ork

 c

ondItIon

The information in Section A is quoted from  

NFPA 70E 2004 - 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breakers are withdrawn to the fully 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.

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

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 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  

Powell version Siemens LVAR Racking Device.

c.  G

enerAl

1.  Only supervised and qualified personnel 

trained in the usage, installation, operation, 

and maintenance of the metal-clad 

switchgear shall be allowed to work on 

this equipment.  It is mandatory that this 

instruction bulletin, any supplements, and 

service advisories be studied, understood, 

and followed.

2.  Maintenance programs must be consistent 

with both customer experience and 

manufacturer’s recommendations, 

including service advisories and instruction 

bulletin(s).  A well planned and executed 

routine maintenance program is essential 

for reliability and safety.

3.  Service conditions and applications shall 

also be considered in the development 

of safety programs.  Variables include 

ambient temperature; humidity; actual 

continuous current; thermal cycling; 

number of operations; and any adverse 

local conditions including excessive dust, 

ash, corrosive atmosphere, vermin and 

insect infestations.