9137200997 Rev D
BE1-51 General Information
1-3
•
0.5 to 4 amperes (phase) and 1.5 to 12 amperes (neutral)
•
1.5 to 12 amperes (phase and neutral)
•
0.1 to 0.8 amperes (phase and neutral)
•
0.3 to 2.4 amperes (phase) and 0.1 to 0.8 amperes (neutral)
•
0.3 to 2.4 amperes (phase and neutral)
For all other units, two ranges are available. They are 0.5 to 12 amperes and 0.1 to 2.4 amperes.
Power Supply
Five power supply options are available. They are:
•
24
Vdc
•
48
Vdc
•
125 Vdc and 100/125 Vac
•
48 Vdc or 125 Vdc and 100/125 Vac
•
250 Vdc and 240 Vac
Targets
Single-phase relays have two function targets that indicate when the time delay or instantaneous
element(s) have operated. On multiple phase relays, additional targets indicate which phase or neutral
element(s) operated.
Function targets may be specified as either internally operated or current operated by a minimum of 0.2
amperes through the output trip circuit. When current operated, the output circuit must be limited to 30
amperes for 0.2 seconds, 7 amperes for 2 minutes, and 3 amperes continuously.
Outputs
Optional normally opened, normally closed, or SPDT auxiliary output contacts may be selected. Contacts
actuate when the output relay is energized. Internally operated front panel mounted targets, and front
panel targets operated by the dc current in the output circuit are available for the time overcurrent and
instantaneous overcurrent functions. Optional front panel mounted
PUSH-TO-ENERGIZE-OUTPUT
pushbuttons allow direct actuation of each output relay for external circuit testing.
Instantaneous Outputs
One or two instantaneous overcurrent outputs are optionally available. Each is adjustable up to 40 times
the time overcurrent pickup point. When the sensed current exceeds the instantaneous overcurrent
pickup point, an output relay is energized. An independent front panel control
(INST 1
or
INST 2)
adjusts
the pickup point for each optional output. If more than one phase is applied to the relay, the instantaneous
pickup point will be the same for all phases. If neutral current is sensed, a front panel
INST 1 (NEUTRAL)
provides adjustment of the neutral pickup point. Instantaneous overcurrent elements are not voltage
controlled.
Packaging
Each relay is mounted in a drawout cradle and enclosed in a standard utility style case with either semi-
flush or projection mounting (depending upon case style selected). Circuit components are accessed by
removing the individual printed circuit boards from the relay cradle. Use an extender card (Basler Electric
part number: 9165500199) to test and troubleshoot the relay. An available test plug (Basler Electric part
number: 10095 or G.E. part number 12XLA12A1) allows the relay to be tested in place without disturbing
external control circuit wiring.
MODEL AND STYLE NUMBER DESCRIPTION
Electrical characteristics and operational features included in a particular style of the BE1-51 Time
Overcurrent Relay are defined by a combination of letters and numbers that make up its style number.
The model number, together with the style number, describes the options included in a specific device,
and appears on the front panel, drawout cradle, and inside the case assembly. Upon receipt of a relay, be
sure to check the style number against the requisition and the packing list to ensure that they agree.