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NEW Flashcards

1
Q

Operating Error - East River

A

.

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2
Q

Operating Error - Cherry St

A

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3
Q

Operating Error - West 42nd

A

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4
Q

0400-0400

A

PSMP

  • Compliance with NERC Standard PRC005-6
  • PM of protection system elements:
    1. Protective relays
    2. Communication systems
    3. V/I sensing devices
    4. Station DC supply
    5. DC control circuitry
  • Time-based maintenance program for BES protection
  • PSMP maintenance intervals meet or exceed NERC requirements
  • Maximo asset and work management software to schedule/track time-based maintenance (listed by zone of protection)
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5
Q

0400-0400

PM Frequency

A

Protective BES Microprocessor Relay – 6 years
(analog-to-digital, settings, I/O)

Protective BES Non-Microprocessor Relay – 4 years
(Calibrate following Protest test plans, relay manufacturer, 0400 instructions)

Communication Systems – 4 years, 12 years
(Operational tests)

CT/PT – Same interval as protective relay
In service/Out of service (CT SAT)

DC Control Circuitry – 4 years (BES)/6 years (non-BES)
Trip checks

Station DC Supply – 4 months/18 months (SSM/Station Operators)
Supply voltage, etc

Alarm Paths – 12 years

UFLS – 12 years

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6
Q

0400-0205

A

Microprocessor Relay Maintenance and Testing

  • Equipment: Protection Suite, Microprocessor Relay Maintenance Form, laptop, relay software, Doble Test Set, multimeter, cables

Before testing: Provide proper isolation, PST awareness checklist checked off, work permit, schematics

  1. Verify I/O
  2. Metering check: verify analog-to-digital converter (inject balanced I/V, compare to metered values of relay, verify CT/PT ratios)
  3. Verify relay settings, time/date
  4. Verify passwords
  5. Force output contact/verify input contact
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7
Q

0400-0347

A

Testing Electric Circuits
- Required at new installation or where modifications have taken place

AC:

  • Point-to-point wire checks: buzzer
  • Insulation resistance: use megger (high V, low I), disconnect form ground, apply V. Minimum is CE-ES-1002

DC (control, power, alarm, Sequence of Event Recorders, oscillograph, annunciator):

  • Insulation resistance
  • Operational
  • Polarity (oscillograph inputs)
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8
Q

0400-0402

A

Testing Guidelines for Commissioning Equipment

AC

  • Wire checks
  • Insulation resistance
  • Circulating current (read with phase angle meter)
  • Primary injection
  • Load readings (phase angle meter)

DC

  • Trip/operational
  • Insulation resistance

Relays
- Test plans, I/O, analog-to-digital

CT/PT
CT: Ratio, polarity, insulation resistance, saturation (CT)
PT: ratio, polarity

Communication Circuits, Alarms, Indications

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9
Q

0400-0345

A

Performing Trip and Operational Tests at Area Substations

  • Isolate
  • Local trip tests/full trip test
  • Verify breaker failure timers
  • Transfer trip
  • AGS/CS
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10
Q

0400-0437

A

Startup/shutdown trips

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11
Q

0400-0401

A

Guidelines for Primary Injection Testing

Unbalanced/balanced

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12
Q

0400-0108

A

Testing Multi-Contact Auxiliary Relays

  • Self reset, manual reset, electrical reset
  • Insulation resistance, mechanical inspection, trip/reset coil R, minimum pickup, operating times
    Etc.
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13
Q

0400-0316

A

Working Near Electrical Equipment in Substations

  • Isolate from all sources of supply (including backfeed) before testing
  • Adequate clearance: Blue Book
  • When working on in-service equipment, discuss possibility of inadvertent trip out with operator

Before signing Work Permit, verify that protection has been provided by Substation Operator

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14
Q

0300-0030

Types of permits

A

Work Permits and Test Permits

Work permit: Permission granted to permit work or test on equipment. Verbal may be issued to PST for in-service work

Test permit: Permission for employees not normally working in substations to apply V to dead equipment

Electrical permit: work on electrical equipment

Mechanical permit: steam/water/oil/insulating or dielectric fluid, etc

Area permit: area where structural, construction, alteration, excavation or demolition work

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15
Q

Authorized Employee

A

A person certified by department manager as meeting minimum requirement to hold work or test permit.

Maintained in SSO website

0300-0030

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16
Q

Ground Level Only

A

Substation Ops where people/equipment/tools not working within minimum approach of non-protected electrical conductors

0300-0030

17
Q

Provide own Isolation

A

In-service and out-of-service: PST isolate relay circuits as necessary

0300-0030

18
Q

When permits needed

A

Work which requires contact (may result in contact) with current-carrying electrical equipment

0300-0030

19
Q

Multiple work permits?

A

Once work permit issued for one group, no other permits may be issued if that work would interfere or alter protection for first group

If possible to have multiple, Substation Operator coordinates

0300-0030

20
Q

Issuing work permit

A

Substation Operator&authorized employee discuss scope of work, review protection, walk-down protection with permit.

All employees on site discuss scope of work with HTOD.

All employees do job briefing

All employees sign form

0300-0030

21
Q

Work permit software

A

ISWP: In Service Work Permit system

Notify system operation department (6 hours normally)

0300-0030

22
Q

Verbal Work Permit

A

If no Substation Operator.

PST tech calls Shift Manager, enters info in log
PST tech contact DO, request verbal

End of shift: return work permit to DO, calls shift manager

0300-0030

23
Q

Transfer work permit

A

Planned work not completed end of shift, equipment cannot be returned to service

Transfer the permit to the Substation Operator

0300-0030

24
Q

Open Work Permit

A

For long-term project, working group does not need to sign off every day. Must log in substation log though

Need to re-walk down the protection each shift through

0300-0030

25
Q

Return of completed work permit

A

Return to substation operator. Operator inspects equipment, operational checks as necessary

0300-0030

26
Q

0300-0010

A

Substation Operating and Maintenance Tags

27
Q

Tag Types

A

Defective Equipment Tag

Stop Tag: black and white striped. Applied/Removed by Substation Operator via an Operator order. For equipment that provides protection for working group

Temporary Modification Tag: for bypassed circuits and temporary power supplies

Work in Progress Tag (PST): test in progress, isolation, troubleshooting, etc.

Static Grounds Applied

0300-0010

28
Q

Blue Book Protection

2 methods of proection

A

Section 5

  1. Protection applied to prevent accidental energizing of equipment that has been de-energized form dead work.
  2. Insulating protective devices: rubber gloves, mats, etc
29
Q

Blue Book Section: Protection for Dead Work

A

Section 5.9

  1. Isolate from each source of electrical supply
    • Many ways: blocked/stop tagged disconnecting switch, open/stop tagged pothead, open/stop tagged circuit breaker, open network protector, visible gap in circuit (remove wire/bus)
  2. Ground conductors radiating in each direction from working point
30
Q

PST # techs

A

23 techs

17 permit holders

31
Q

PPE for danger from electric arcs/flashes

A

Approved hard hats, face shields and rubber gloves with protectors and fire resistant clothing shall be worn whenever a danger from electric arcs or flashes exist during operations performed in the proximity to exposed current carrying parts in any voltage classification. Where necessary, the operator shall also use an approved live line tool and sleeves.

Blue Book Section 5.12

32
Q

Stop Tag Application (who can)

A

The installation, removal or replacement of stop tags in the field shall be performed only by authorized employees under the direction of the operator having jurisdiction.

Blue Book Section 5.14

33
Q

Verifying Protection

A

To verify that electrical equipment which is not visibly grounded at the work point, is dead prior to proceeding with dead work, all conductors at the work point must be tested dead with an approved voltage detector.

Blue Book Section 5.3

PST (9 decks)

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