ECP 11-0209 Interlocks Test Form

Document Number: ECP 11-0209

Version: 3.0

Date: 30/01/2017

INTERLOCKS TEST FORM

Substation Name Substation Number Circuit

General Data

Interlocking circuit diagram number

Mechanical interlocks ( or n/a)

Circuit Breakers

Check keys and locks with interlocking schematic Circuit breaker number Keys trapped in intermediate position and only released in fully open or fully closed position as appropriate to the particular interlock

Isolators

Isolator number Check keys and locks and their function with interlocking circuit diagram Keys trapped in intermediate position and only released in the fully open or fully closed position as appropriate to the particular interlock Subject to the energising of the magnetic bolt, bolt release requires the application of all keys

Earth Switches

Earth switch number Check keys and locks and their function with interlocking circuit diagram Keys released only in the fully open or fully closed position Removal of any key prevents operation

Maintenance Earthing Devices

Maintenance earthing device number Check keys and locks and their function with interlocking circuit diagram All keys required for operation

Key Exchange Boxes Key exchange box ID Check keys and locks and their function with interlocking circuit diagram

Excess Keys

Confirm that not more than the correct number of keys are available

Electrical interlocks ( or n/a)

Local Auxiliary Switch Chains

Check to circuit diagram number…………………… Each alternative chain of auxiliary switches when closed permits operation, and opening of any one contact prevents operation

Auxiliary Switch Chains for Parallel Operation

Check with interlocking circuit diagram Each alternative chain of auxiliary switches when closed permits operation, and any one contact open prevents operation

Electrical Bolts Operational Tests

Check operation of all bolts at standing batter volts

Comments

Certification ()

All tests have been completed satisfactorily

Contractor Commissioning Engineer (if applicable)

Organisation Name

Date Signature

UK Power Networks Commissioning Engineer

Name Signature Date