Basler Electric BE1-51 - Manual (Page 9)

9137200997 Rev G 3
set the neutral pickup point. In addition, for three-phase-and-neutral sensing units, one of the seven
sensing input range combinations must be specified.
Sensing Input Range
For three-phase-and-neutral sensing units, input ranges are:
•
0.5 to 4.0 amperes (phase and neutral)
•
1.5 to 12 amperes (phase) and 0.5 to 4.0 amperes (neutral)
•
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: 0.5 to 12 amperes and 0.1 to 2.4 amperes.
Power Supply
Five power supply options are available:
•
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). An available test plug (Basler Electric
part number 10095) allows the relay to be tested in place without disturbing external control circuit wiring.
BE1-51 Introduction