9252000897 Rev A
BE1-50/51B-233 Installation
4-1
SECTION 4
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INSTALLATION
GENERAL
When not shipped as part of a control or switchgear panel, the relays are shipped in sturdy cartons to
prevent damage during transit. Immediately upon receipt of a relay, check the model and part number
against the requisition and packing list to see that they agree. Visually inspect the relay for damage that
may have occurred during shipment. If there is evidence of damage, immediately file a claim with the
carrier and notify the Regional Sales Office, or contact the Sales Representative at Basler Electric,
Highland, Illinois.
Proper operation of the relay may be confirmed by performing the operational test procedure of Section 5.
If the relay won't be installed immediately, store the relay in its original shipping carton in a moisture and
dust-free environment.
FACTORY SETTINGS
Factory settings for the internal switches of SW3 are as follows:
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SW3-1 — OFF (0.0 additional fixed delay for the instantaneous element).
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SW3-2 — OFF (0.0 additional fixed delay for the instantaneous element).
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SW3-3 — OFF (Westinghouse/ABB type characteristic curves).
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SW3-4 — ON (Integrating reset characteristics).
INSTALLATION
Select the desired relay settings before putting the relay into service. Changing pickup current settings
while the relay is in service may cause tripping. Perform the following procedures to install the BE1-
50/51B-233 relay.
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Select the desired relay settings on your new BE1-50/51B-233 relay.
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Remove the existing ABB relay cradle.
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Insert the new relay cradle and close the cradle latches locking the relay into the case.
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Close knife-blade switches.
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To install the cover, position the interlocking bracket at the top of the new Basler Electric cover into
the mating receptacle at the top of the case. Secure the captive fastener at the bottom of the cover.
APPLICATION COORDINATION
In a typical application coordination scheme, a BE1-50/51B-233 is being used to provide primary
protection for a radial distribution feeder. An electromechanical overcurrent relay with extremely inverse
timing provides protection for the transformer and bus. To improve coordination with the
electromechanical relay, the BE1 relay with integrating reset characteristic has the time characteristic
curve E (extremely inverse) selected (SW3-3 set to OFF) and the TIME DIAL set to 2.0. The feeder
NOTE
Be sure that the relay is hard-wired to earth ground with no smaller than 12 AWG
copper wire attached to the ground terminal on the rear of the unit case. When
the relay is configured in a system with other devices, it is recommended to use a
separate lead to the ground bus from each unit.
CAUTION
Close all BLACK handle switches before closing any RED handle switches.
Insure that the RED handle switches are closed last.
Summary of Contents for BE1-50/51B-233
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