To Next Page

To Previous Page

5-8 BE1-50/51M - Testing

NOTES

When testing TIME overcurrent functions, INST PICKUP settings of 00 will affect the

calibration of the TIME functions. TIME PICKUP settings of 00 also affect INST

functions.

Step 1. Set target current source to 1.0 ampere, ac.

Step 2. Apply 0.15 ampere input current to terminals 8 and 9.

Step 3. Connect a jumper between TIME MANUAL TRIP test points. Check that TIME target operates.

Step 4. Connect a jumper between INST MANUAL TRIP test points. Check that INST target operates.

Step 5. Reset targets.

Integrating Reset Test

(Applicable Only To 200 Series Relays)

Perform preliminary setup:

Connect test setup as shown in Figure 5-1.

Insure that SW3 switches are set correctly: SW3-1 for operating frequency, SW3-2 to OFF (no

instantaneous delay), SW3-3 to OFF (no instantaneous delay (100 series relays) or ABB type curves

selected (200 series relays) ), and

SW3-4 to ON

(selects integrating reset).

Set TIME DIAL to 4.5.

Set CURVE to I.

Set TIME PICKUP to .20.

Set INST PICKUP to 18.

Step 1. Set target current source to 1.0 ampere, ac.

Step 2. Read all of Step 3 before beginning Step 3.

Step 3. Apply 0.8 ampere input current to terminals 8 and 9. After the unit trips, remove the input current for 20

±0.25 seconds, then reapply the 0.8 ampere input current. Record the elapsed time from the

reapplication of input current to the output retrip.

Result:

Elapsed time should be 1.55 ±0.3 seconds.

SETTING THE RELAY

Select the desired relay settings before putting the relay into service. Changing pickup current settings while

the relay is in service may cause tripping.

PERIODIC TESTS

General

All relays should be tested periodically to identify and correct any problems that are found.

Single phase relays such as the BE1-50/51B-105 are normally used in groups of four (three phase and ground)

on the protected circuit. Only three are required at any one time to provide complete protection. The fourth one

assures that protection is maintained even if one relay failed.

This protection scheme also allows one unit at a time to be withdrawn for testing purposes without loosing

protection during the test. Refer to Figures 5-1 and 5-2 for recommended test setups.

Courtesy of NationalSwitchgear.com

Brand	Basler
Model	BE1-50/51M-100 Series
Category	Relays
Language	English

Basler BE1-50/51M-100 Series User Manual

Table of Contents

Questions and Answers:

Basler BE1-50/51M-100 Series Specifications

Related product manuals