6) Uo selectable by parameter, Uo measured as default.
7) Multi-purpose protection is used for, for example, RTD/mA based protection.
3. Protections functions
The IED offers all the functionality needed to
manage motor starts and normal operation,
also including protection and fault clearance
in abnormal situations. The main features of
the IED include thermal overload protection,
motor start-up time supervision, locked rotor
protection and protection against too
frequent motor starts. The IED also
incorporates non-directional earth-fault
protection, negative phase-sequence current
unbalance protection and backup overcurrent
protection. Furthermore, the IED offers motor
running stall protection, loss-of-load
supervision and phase-reversal protection.
Standard configurations B and C additionally
offer directional earth-fault protection, three
phase undervoltage protection, negative
phase-sequence overvoltage and positive
sequence undervoltage protection. Further,
the B and C configurations offer frequency
protection including overfrequency,
underfrequency and rate-of-change frequency
protection modes.
The RTD/mA module offered as an option for
standard configurations A and B enable the
use of the optional multipurpose protection
function which can be used for tripping and
alarm purposes using RTD/mA measuring
data or analog values via GOOSE messages.
In certain motor drives of special importance
there must be a possibility to override the
motor thermal overload protection to perform
an emergency start of a hot motor. To enable
an emergency hot start, REM615 offers a
forced start execution feature.
Enhanced with optional hardware and
software, the IED also features three light
detection channels for arc fault protection of
the circuit breaker, busbar and cable
compartment of metal-enclosed indoor
switchgear.
The arc-fault protection sensor interface is
available on the optional communication
module. Fast tripping increases personnel
safety and limits switchgear damage, should
an arc fault occur.
Motor Protection and Control 1MRS756890 D
REM615
Product version: 3.0 Issued: 2010-06-29
6 ABB
To Next Page
Loading...
