ABB CP Series Інструкція з експлуатації - Сторінка 6

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41-222.2J

Fig. 8.

Diagram of Test Connection for Checking the

Undervoltage Time Curves of the Type CP Relay.

Check all of the scale markings in a similar

manner.

3. Time Curve - The time curve can be checked by

the use of the circuits of Figs. 8 and 9.

B. INDICATING CONTACTOR SWITCH (ICS)

Close the main relay contacts and pass sufficient d-c

current through the trip circuit to close the contacts of

the ICS. This value of current should not be greater

than the particular ICS setting being used. The indi-

cator target should drop freely.

The contact gap should be approximately .047"

between the bridging moving contact and the adjust-

able stationary contacts. The bridging moving

contact should touch both stationary contacts simul-

taneously.

C. INDICATING VOLTAGE SWITCH (IVS)

Close the main relay contacts and apply rated d-c

voltage across terminals 1 and 10. The contacts of

the IVS unit should close and the indicator target

should drop freely.

Sub 3

184A199

Fig. 9.

Diagram of Test Connection for Checking the

Overvoltage Time Curves of the Type CP Relay.

6.1

ROUTINE MAINTENANCE

All relays should be inspected periodically and the

time of operation should be checked at least once

every year or at such other time intervals as may be

dictated by experience to be suitable to the particular

application.

All contacts should be periodically cleaned. A contact

burnishes S#182A836HO1 is recommended for this

purpose. The use of abrasive material for cleaning

contacts is not recommended, because of the danger

of embedding small particles in the face of the soft

silver contact and thus impairing the contact.

6.2

CALIBRATION

Use the following procedure for calibrating the relay if

the relay has been taken apart for repairs, or the

adjustments have been disturbed. This procedure

should not be used until it is apparent that the relay is

not in proper working order (See "Acceptance

Check").

Type CP Reverse Phase Relay

Sub 2

184A195