Extech Instruments MG500 Instrukcja Użytkownika Pobierz pdf (Strona 11)

MG500-EU-EN v1.0 7/13

DCMotorTest

1. Disconnectthemotorfromtheline.

2. Totestthebrushrigging,fieldcoils,andarmature,connecttheREDleadtothegrounded

motorhousingandtheGREENleadtothebrushonthecommutator.

3. Iftheresistancemeasurementindicatesaweakness,raisethebrushesoffofthe

commutator

andseparatelytestthearmature,fieldcoils,andbrushriggingbyconnecting

oneleadtoeachindividually,leavingthe otherconnectedtothegroundedmotorhousing.

ThisalsoappliestoDCGenerators.



TestingSingleConductorCables

1. Completelydisconnectthecable

undertestfromitssourceand

destination.

2. Connectthetestleadstothe

cableasshownatright.



TestingMultiConductorCables

1. Completelydisconnectthecableundertestfromitssourceanddestination.

2. Refertothediagramsbelowforthreepossibletests.



Core Insulation Sheath Covering

EARTH GUARD LINE

Testing one conductor to

all of the conductors

Testing one conductor

to earth

One conductor to all

minus ground

EARTH

LINE

EARTH

GUARD

LINE

EARTH

1 2 ... 6 7 8 9 10 11 12 13 14 15

Brak uwag

Extech Instruments MG500 Instrukcja Użytkownika Strona 11