Nortel DMS-100 Series Maintenance Manual page 8

vi Contents
3.2 Power plant critical limits 3-18
3.3 Power plant maintenance schedule 3-19
3.4 Power plant checks 3-20
3.5 Power plant safety checks 3-21
3.6 Power plant fuse checks 3-22
3.7 Charging equipment checks 3-22
3.8 Battery equipment checks 3-24
3.9 Standby power system checks 3-34
3.10 Standby engine-alternator checks 3-35
3.11 Standby power system exercise 3-36
3.12 Miscellaneous power plant checks 3-41
3.13 Submitting the maintenance report 3-42
4 Grounding system maintenance
4.1 Grounding system diagrams 4-1
4.2 Tools required 4-1
4.3 Building principal ground (BPG) checks 4-2
4.4 Ground resistance test 4-3
4.5 Floor ground bar (FGB) checks 4-3
4.6 Power plant grounding checks 4-4
4.7 AC grounding checks 4-4
4.8 DMS SPG checks 4-5
4.9 Framework bonding equalizer (FBE) checks 4-6
4.10 Framework ground bus checks 4-7
4.11 Logic return equalizer (LRE) checks 4-8
4.12 Logic return bar (LRB) checks 4-9
4.13 Bonding within DMS cabinets/frames 4-9
4.14 Cable entrance ground bar (CEGB) checks 4-9
4.15 Main distribution frame/protector frame checks 4-10
4.16 Cleaning corroded grounding connections 4-11
4.17 Grounding audit 4-12
List of figures
Figure 3-1
297-1001-350 Standard 02.02 August 1997
Draft: June 2, 1993
3.1.1 Maintenance records 3-1
3.1.2 Maintenance action record 3-17
3.1.3 Tools 3-17
3.8.1 Maintenance intervals 3-24
3.8.2 Trouble conditions 3-26
3.8.3 Post connections 3-26
3.8.4 Positive plate growth 3-26
3.8.5 Post corrosion 3-27
3.8.6 Electrolyte level and temperature 3-32
3.8.7 Water analysis report 3-32
3.8.8 Avoiding battery trouble 3-33
3.11.1 Precautions 3-36
3.11.2 Preparations 3-37
3.11.3 Procedure 3-38
4.7.1 AC-free DMS switch 4-4
4.7.2 Other DMS switch versions 4-5
Sample pilot cell voltage and specific gravity test record 3-3
4-1