Basler BE1-87G Manual do Utilizador descarregar pdf (Página 2)

BE1-11g

FEATURES

PROTECTION

• 6 each, Instantaneous Overcurrent (50) elements provide

selection of single or three phase, neutral, zero and

negative seuqence current measurement. Directional and

non-directional operation is a selection Settable definite

time delay is available.

• 7 each, Time Overcurrent (51) elements provide selection

of single or three phase, neutral, zero and negative

sequence current measurement. Voltage control or

restraint characteristics may be selected. The reset

characteristic may be instantaneous or have an inverse

reset characteristic.

• Each Time Overcurrent element may be directional (67/

67N) (forward or reverse) or non-directional. Directional

control may be selected as Positive (I

), Negative (I

) or

Zero (I

) sequence current or zero sequence voltage (V

• 24 industry standard timing curves are available, as well

as a user programmable curve, and up to 4 user-defined

tabular curves for use by any of the Time Overcurrent

elements.

• Minimal transient overreach and overtravel is incorpo-

rated into the design of the overcurrent elements.

• An independent ground current input provides zero

sequence current polarization and/or ground overcurrent

protection.

• Negative sequence overcurrent is a selectable mode of

operation for the Time Overcurrent elements.

• 5 Phase Undervoltage (27P) and 4 Phase Overvoltage

(59P) elements are available for measurement of phase-

to-phase or phase-to-neutral voltage. Sensed voltage

may be single or three phase. Undervoltage elements

include an undervoltage inhibit setting to prevent errone-

ous operation.

• 4 Undervoltage (27X) and 4 Overvoltage (59X) elements

are available to measure single phase inputs (V

) or

calculated sequence voltages (3V

, V

(47)). These

undervoltage elements include an undervoltage inhibit

setting to prevent erroneous operation.

• All voltage elements have a choice of definite or inverse

time characteristics.

• Overexcitation, volts-per-Hertz (24) element provides a

selection for definite or inverse timing characteristics.

• Sync check (25) with line and bus voltage monitoring

logic (25VM).

• 2 directional power (32) elements measure single or three

phase power, in the forward or reverse direction, and

compare the measurement to an over or under power

user setting.

• A choice of Loss of Excitation functional elements is

provided. An offset VAR flow algorithm (40Q) provides

underexcitation protection. A dual offset mho characteris-

tic (40Z) with voltage suppression provides complete

protection for a loss of excitation.

• Fuse loss detection protects against false tripping due to

the loss of a sensing voltage (60FL).

• 8 frequency elements may be set individually for over,

under, or rate-of-change of frequency. The rate-of-change

can be set for positive, negative, or either. Each element

can be assigned to either the three phase or single phase

) voltage input. Each element includes an

undervoltage inhibit setting.

• Breaker Failure (BF) protection functionality.

• 8 general purpose logic timers (62) and additional logic

elements provide added functionality in the user de-

signed BESTLogicPlus schemes.

• 4 protection setting groups with external or automatic

selection modes.

CONTROL

• Five virtual selector switches (43) are controllabe from

both the HMI and communication ports.

• Virtual lockout (86) latches. Status is stored in EEPROM.

• Virtual breaker control switch (101) is controllable from

both the HMI and communication ports.

• Communication port control in the virtual switches

provides SCADA control of the protective system and

circuit breaker.

INSTRUMENTATION

• Real time phase (A, B, C) currents, voltages, and

frequency, as well as the calculated neutral current,

and negative and zero sequence current and voltage.

• Real Time per phase and 3 phase Watts, Vars, and

Power Factor.

• Auxiliary input fundamental and third harmonic voltage.

• Phase angle.

• Demand currents, watts, and vars.

REPORTS

• Current demands for phase, neutral, negative sequence

current, and forward and reverse watts and vars.

Magnitudes and time stamps are recorded for today's

peak, yesterday's peak, and peak since last reset.

• 4000 point log of demand readings.

• kWh and kVarh, forward and reverse.

• Breaker operations counter and contact interruption duty

FAULT RECORDING

• 1028 event sequence-of events report with I/O and

alarm sub-reports.

• Fault Reporting - 1 or 2 oscillographic records per

fault record.

• 16 fault summary reports. All Fault Summary Records

saved in non-volatile memory

• Oscillographic memory will store up to 240 cycles of

data @ 32 samples/cycle

• Oscillographic records are in the COMTRADE format.

• Distance-to-fault is calculated using a load compen-

sated algorithm.

COMMUNICATIONS PORTS

• Three independent general purpose communication

ports and available protocols:

- Front USB-B: BESTCOMSPlus

- Rear RS-485: Modbus™ or DNP





3.0

- Rear Ethernet: BESTNetPlus, BESTCOMSPlus,

Modbus™ and DNP





3.0 protocols

- IRIG-B time sync (unmodulated)

SELF TEST and ALARM FUNCTIONS

• Relay fail, major alarm, and minor alarm LEDs, and

fail-safe alarm output contact (open or closed)

See style chart, page 12, for ordering information.

1 2 3 4 5 6 7 ... 11 12

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